// This file was generated automatially by gencpp's singleheader.cpp(See: https://github.com/Ed94/gencpp)

#pragma once

#if __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-const-variable"
#pragma clang diagnostic ignored "-Wswitch"
#pragma clang diagnostic ignored "-Wunused-variable"
#pragma clang diagnostic ignored "-Wunknown-pragmas"
#pragma clang diagnostic ignored "-Wvarargs"
#pragma clang diagnostic ignored "-Wunused-function"
#endif

#if __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunknown-pragmas"
#pragma GCC diagnostic ignored "-Wcomment"
#pragma GCC diagnostic ignored "-Wswitch"
#pragma GCC diagnostic ignored "-Wunused-variable"
#endif
/*
    gencpp: An attempt at "simple" staged metaprogramming for c/c++.

    See Readme.md for more information from the project repository.

    Public Address:
    https://github.com/Ed94/gencpp

    This is a single header variant of the library.
    Define GEN_IMPLEMENTATION before including this file in a single compilation unit.
*/
#if ! defined( GEN_DONT_ENFORCE_GEN_TIME_GUARD ) && ! defined( GEN_TIME )
#error Gen.hpp : GEN_TIME not defined
#endif

#ifdef GEN_DONT_USE_NAMESPACE
#define GEN_NS_BEGIN
#define GEN_NS_END
#else
#define GEN_NS_BEGIN \
	namespace gen    \
	{
#define GEN_NS_END }
#endif


//! If its desired to roll your own dependencies, define GEN_ROLL_OWN_DEPENDENCIES before including this file.
// Dependencies are derived from the c-zpl library: https://github.com/zpl-c/zpl
#ifndef GEN_ROLL_OWN_DEPENDENCIES

#pragma once

#pragma region Platform Detection

/* Platform architecture */

#if defined( _WIN64 ) || defined( __x86_64__ ) || defined( _M_X64 ) || defined( __64BIT__ ) || defined( __powerpc64__ ) || defined( __ppc64__ ) \
|| defined( __aarch64__ )
#ifndef GEN_ARCH_64_BIT
#define GEN_ARCH_64_BIT 1
#endif
#else
#ifndef GEN_ARCH_32_BItxt_StrCaT
#define GEN_ARCH_32_BIT 1
#endif
#endif

/* Platform OS */

#if defined( _WIN32 ) || defined( _WIN64 )
#ifndef GEN_SYSTEM_WINDOWS
#define GEN_SYSTEM_WINDOWS 1
#endif
#elif defined( __APPLE__ ) && defined( __MACH__ )
#ifndef GEN_SYSTEM_OSX
#define GEN_SYSTEM_OSX 1
#endif
#ifndef GEN_SYSTEM_MACOS
#define GEN_SYSTEM_MACOS 1
#endif
#include <TargetConditionals.h>
#if TARGET_IPHONE_SIMULATOR == 1 || TARGET_OS_IPHONE == 1
#ifndef GEN_SYSTEM_IOS
#define GEN_SYSTEM_IOS 1
#endif
#endif
#elif defined( __unix__ )
#ifndef GEN_SYSTEM_UNIX
#define GEN_SYSTEM_UNIX 1
#endif
#if defined( ANDROID ) || defined( __ANDROID__ )
#ifndef GEN_SYSTEM_ANDROID
#define GEN_SYSTEM_ANDROID 1
#endif
#ifndef GEN_SYSTEM_LINUX
#define GEN_SYSTEM_LINUX 1
#endif
#elif defined( __linux__ )
#ifndef GEN_SYSTEM_LINUX
#define GEN_SYSTEM_LINUX 1
#endif
#elif defined( __FreeBSD__ ) || defined( __FreeBSD_kernel__ )
#ifndef GEN_SYSTEM_FREEBSD
#define GEN_SYSTEM_FREEBSD 1
#endif
#elif defined( __OpenBSD__ )
#ifndef GEN_SYSTEM_OPENBSD
#define GEN_SYSTEM_OPENBSD 1
#endif
#elif defined( __EMSCRIPTEN__ )
#ifndef GEN_SYSTEM_EMSCRIPTEN
#define GEN_SYSTEM_EMSCRIPTEN 1
#endif
#elif defined( __CYGWIN__ )
#ifndef GEN_SYSTEM_CYGWIN
#define GEN_SYSTEM_CYGWIN 1
#endif
#else
#error This UNIX operating system is not supported
#endif
#else
#error This operating system is not supported
#endif

/* Platform compiler */

#if defined( _MSC_VER )
#define GEN_COMPILER_MSVC 1
#elif defined( __GNUC__ )
#define GEN_COMPILER_GCC 1
#elif defined( __clang__ )
#define GEN_COMPILER_CLANG 1
#elif defined( __MINGW32__ )
#define GEN_COMPILER_MINGW 1
#error Unknown compiler
#endif

#if defined( __has_attribute )
#define GEN_HAS_ATTRIBUTE( attribute ) __has_attribute( attribute )
#else
#define GEN_HAS_ATTRIBUTE( attribute ) ( 0 )
#endif

#if defined( GEN_GCC_VERSION_CHECK )
#undef GEN_GCC_VERSION_CHECK
#endif
#if defined( GEN_GCC_VERSION )
#define GEN_GCC_VERSION_CHECK( major, minor, patch ) ( GEN_GCC_VERSION >= GEN_VERSION_ENCODE( major, minor, patch ) )
#else
#define GEN_GCC_VERSION_CHECK( major, minor, patch ) ( 0 )
#endif

#define GEN_DEF_INLINE  static
#define GEN_IMPL_INLINE static inline

#pragma endregion Platform Detection

#pragma region Mandatory Includes

#include <stdarg.h>
#include <stddef.h>

#if defined( GEN_SYSTEM_WINDOWS )
#include <intrin.h>
#endif

#pragma endregion Mandatory Includes

#ifdef GEN_DONT_USE_NAMESPACE
#define GEN_NS
#define GEN_NS_BEGIN
#define GEN_NS_END
#else
#define GEN_NS gen::
#define GEN_NS_BEGIN \
	namespace gen    \
	{
#define GEN_NS_END }
#endif

GEN_NS_BEGIN

#pragma region Macros

#define zpl_cast( Type ) ( Type )

// Keywords

#define global        static    // Global variables
#define internal      static    // Internal linkage
#define local_persist static    // Local Persisting variables

#ifdef GEN_COMPILER_MSVC
#define forceinline __forceinline
#define neverinline __declspec( noinline )
#elif defined( GEN_COMPILER_GCC )
#define forceinline inline __attribute__( ( __always_inline__ ) )
#define neverinline __attribute__( ( __noinline__ ) )
#elif defined( GEN_COMPILER_CLANG )
#if __has_attribute( __always_inline__ )
#define forceinline inline __attribute__( ( __always_inline__ ) )
#define neverinline __attribute__( ( __noinline__ ) )
#else
#define forceinline
#define neverinline
#endif
#else
#define forceinline
#define neverinline
#endif

// Bits

#define bit( Value )                           ( 1 << Value )
#define bitfield_is_equal( Type, Field, Mask ) ( ( Type( Mask ) & Type( Field ) ) == Type( Mask ) )

// Casting

#define ccast( Type, Value ) ( *const_cast< Type* >( &( Value ) ) )
#define pcast( Type, Value ) ( *reinterpret_cast< Type* >( &( Value ) ) )
#define rcast( Type, Value ) reinterpret_cast< Type >( Value )
#define scast( Type, Value ) static_cast< Type >( Value )

// Num Arguments (Varadics)
// #if defined(__GNUC__) || defined(__clang__)
// Supports 0-50 arguments
#define num_args_impl( \
_0,                    \
_1,                    \
_2,                    \
_3,                    \
_4,                    \
_5,                    \
_6,                    \
_7,                    \
_8,                    \
_9,                    \
_10,                   \
_11,                   \
_12,                   \
_13,                   \
_14,                   \
_15,                   \
_16,                   \
_17,                   \
_18,                   \
_19,                   \
_20,                   \
_21,                   \
_22,                   \
_23,                   \
_24,                   \
_25,                   \
_26,                   \
_27,                   \
_28,                   \
_29,                   \
_30,                   \
_31,                   \
_32,                   \
_33,                   \
_34,                   \
_35,                   \
_36,                   \
_37,                   \
_38,                   \
_39,                   \
_40,                   \
_41,                   \
_42,                   \
_43,                   \
_44,                   \
_45,                   \
_46,                   \
_47,                   \
_48,                   \
_49,                   \
_50,                   \
_51,                   \
_52,                   \
_53,                   \
_54,                   \
_55,                   \
_56,                   \
_57,                   \
_58,                   \
_59,                   \
_60,                   \
_61,                   \
_62,                   \
_63,                   \
_64,                   \
_65,                   \
_66,                   \
_67,                   \
_68,                   \
_69,                   \
_70,                   \
_71,                   \
_72,                   \
_73,                   \
_74,                   \
_75,                   \
_76,                   \
_77,                   \
_78,                   \
_79,                   \
_80,                   \
_81,                   \
_82,                   \
_83,                   \
_84,                   \
_85,                   \
_86,                   \
_87,                   \
_88,                   \
_89,                   \
_90,                   \
_91,                   \
_92,                   \
_93,                   \
_94,                   \
_95,                   \
_96,                   \
_97,                   \
_98,                   \
_99,                   \
_100,                  \
N,                     \
...                    \
)                      \
	N

// ## deletes preceding comma if _VA_ARGS__ is empty (GCC, Clang)
#define num_args( ... ) \
	num_args_impl(      \
	_,                  \
	##__VA_ARGS__,      \
	100,                \
	99,                 \
	98,                 \
	97,                 \
	96,                 \
	95,                 \
	94,                 \
	93,                 \
	92,                 \
	91,                 \
	90,                 \
	89,                 \
	88,                 \
	87,                 \
	86,                 \
	85,                 \
	84,                 \
	83,                 \
	82,                 \
	81,                 \
	80,                 \
	79,                 \
	78,                 \
	77,                 \
	76,                 \
	75,                 \
	74,                 \
	73,                 \
	72,                 \
	71,                 \
	70,                 \
	69,                 \
	68,                 \
	67,                 \
	66,                 \
	65,                 \
	64,                 \
	63,                 \
	62,                 \
	61,                 \
	60,                 \
	59,                 \
	58,                 \
	57,                 \
	56,                 \
	55,                 \
	54,                 \
	53,                 \
	52,                 \
	51,                 \
	50,                 \
	49,                 \
	48,                 \
	47,                 \
	46,                 \
	45,                 \
	44,                 \
	43,                 \
	42,                 \
	41,                 \
	40,                 \
	39,                 \
	38,                 \
	37,                 \
	36,                 \
	35,                 \
	34,                 \
	33,                 \
	32,                 \
	31,                 \
	30,                 \
	29,                 \
	28,                 \
	27,                 \
	26,                 \
	25,                 \
	24,                 \
	23,                 \
	22,                 \
	21,                 \
	20,                 \
	19,                 \
	18,                 \
	17,                 \
	16,                 \
	15,                 \
	14,                 \
	13,                 \
	12,                 \
	11,                 \
	10,                 \
	9,                  \
	8,                  \
	7,                  \
	6,                  \
	5,                  \
	4,                  \
	3,                  \
	2,                  \
	1,                  \
	0                   \
	)

// #else
// This doesn't work on latest msvc so I had to use /Zc:preprocessor flag.

// Supports 1-50 arguments
// #define num_args_impl(                                  \
// 		_1,  _2,  _3,  _4,  _5,  _6,  _7,  _8,  _9, _10,   \
// 		_11, _12, _13, _14, _15, _16, _17, _18, _19, _20,  \
// 		_21, _22, _23, _24, _25, _26, _27, _28, _29, _30,  \
// 		_31, _32, _33, _34, _35, _36, _37, _38, _39, _40,  \
// 		_41, _42, _43, _44, _45, _46, _47, _48, _49, _50,  \
// 		_51, _52, _53, _54, _55, _56, _57, _58, _59, _60,  \
// 		_61, _62, _63, _64, _65, _66, _67, _68, _69, _70,  \
// 		_71, _72, _73, _74, _75, _76, _77, _78, _79, _80,  \
// 		_81, _82, _83, _84, _85, _86, _87, _88, _89, _90,  \
// 		_91, _92, _93, _94, _95, _96, _97, _98, _99, _100, \
// 		N, ...                                             \
// 	) N

// #define num_args(...)                         \
// 	num_args_impl( __VA_ARGS__,                  \
// 		100, 99, 98, 97, 96, 95, 94, 93, 92, 91, \
// 		 90, 89, 88, 87, 86, 85, 84, 83, 82, 81, \
// 		 80, 79, 78, 77, 76, 75, 74, 73, 72, 71, \
// 		 70, 69, 68, 67, 66, 65, 64, 63, 62, 61, \
// 		 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, \
// 		 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, \
// 		 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, \
// 		 40, 39, 38, 37, 36, 35, 34, 33, 32, 31, \
// 		 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, \
// 		 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, \
// 		 10,  9,  8,  7,  6,  5,  4,  3,  2,  1  \
// 	)
// #endif

// Stringizing
#define stringize_va( ... ) #__VA_ARGS__
#define stringize( ... )    stringize_va( __VA_ARGS__ )

// Function do once

#define do_once()                 \
	do                            \
	{                             \
		static bool Done = false; \
		if ( Done )               \
			return;               \
		Done = true;              \
	} while ( 0 )

#define do_once_start             \
	do                            \
	{                             \
		static bool Done = false; \
		if ( Done )               \
			break;                \
		Done = true;

#define do_once_end \
	}               \
	while ( 0 )     \
		;

#define labeled_scope_start \
	if ( false )            \
	{
#define labeled_scope_end             }

#define clamp( x, lower, upper )      min( max( ( x ), ( lower ) ), ( upper ) )
#define count_of( x )                 ( ( size_of( x ) / size_of( 0 [ x ] ) ) / ( ( sw )( ! ( size_of( x ) % size_of( 0 [ x ] ) ) ) ) )
#define is_between( x, lower, upper ) ( ( ( lower ) <= ( x ) ) && ( ( x ) <= ( upper ) ) )
#define max( a, b )                   ( ( a ) > ( b ) ? ( a ) : ( b ) )
#define min( a, b )                   ( ( a ) < ( b ) ? ( a ) : ( b ) )
#define size_of( x )                  ( sw )( sizeof( x ) )

#if defined( _MSC_VER ) || defined( GEN_COMPILER_TINYC )
#define offset_of( Type, element ) ( ( GEN_NS( gen_sw ) ) & ( ( ( Type* )0 )->element ) )
#else
#define offset_of( Type, element ) __builtin_offsetof( Type, element )
#endif

template< class Type >
void swap( Type& a, Type& b )
{
	Type tmp = a;
	a        = b;
	b        = tmp;
}

#pragma endregion Macros

#pragma region Basic Types

#define GEN_U8_MIN  0u
#define GEN_U8_MAX  0xffu
#define GEN_I8_MIN  ( -0x7f - 1 )
#define GEN_I8_MAX  0x7f

#define GEN_U16_MIN 0u
#define GEN_U16_MAX 0xffffu
#define GEN_I16_MIN ( -0x7fff - 1 )
#define GEN_I16_MAX 0x7fff

#define GEN_U32_MIN 0u
#define GEN_U32_MAX 0xffffffffu
#define GEN_I32_MIN ( -0x7fffffff - 1 )
#define GEN_I32_MAX 0x7fffffff

#define GEN_U64_MIN 0ull
#define GEN_U64_MAX 0xffffffffffffffffull
#define GEN_I64_MIN ( -0x7fffffffffffffffll - 1 )
#define GEN_I64_MAX 0x7fffffffffffffffll

#if defined( GEN_ARCH_32_BIT )
#define GEN_USIZE_MIN GEN_U32_MIN
#define GEN_USIZE_MAX GEN_U32_MAX
#define GEN_ISIZE_MIN GEN_S32_MIN
#define GEN_ISIZE_MAX GEN_S32_MAX
#elif defined( GEN_ARCH_64_BIT )
#define GEN_USIZE_MIN GEN_U64_MIN
#define GEN_USIZE_MAX GEN_U64_MAX
#define GEN_ISIZE_MIN GEN_I64_MIN
#define GEN_ISIZE_MAX GEN_I64_MAX
#else
#error Unknown architecture size. This library only supports 32 bit and 64 bit architectures.
#endif

#define GEN_F32_MIN 1.17549435e-38f
#define GEN_F32_MAX 3.40282347e+38f
#define GEN_F64_MIN 2.2250738585072014e-308
#define GEN_F64_MAX 1.7976931348623157e+308

#if defined( GEN_COMPILER_MSVC )
#if _MSC_VER < 1300
typedef unsigned char  u8;
typedef signed char    s8;
typedef unsigned short u16;
typedef signed short   s16;
typedef unsigned int   u32;
typedef signed int     s32;
#else
typedef unsigned __int8  u8;
typedef signed __int8    s8;
typedef unsigned __int16 u16;
typedef signed __int16   s16;
typedef unsigned __int32 u32;
typedef signed __int32   s32;
#endif
typedef unsigned __int64 u64;
typedef signed __int64   s64;
#else
#include <stdint.h>

typedef uint8_t  u8;
typedef int8_t   s8;
typedef uint16_t u16;
typedef int16_t  s16;
typedef uint32_t u32;
typedef int32_t  s32;
typedef uint64_t u64;
typedef int64_t  s64;
#endif

static_assert( sizeof( u8 ) == sizeof( s8 ), "sizeof(u8) != sizeof(s8)" );
static_assert( sizeof( u16 ) == sizeof( s16 ), "sizeof(u16) != sizeof(s16)" );
static_assert( sizeof( u32 ) == sizeof( s32 ), "sizeof(u32) != sizeof(s32)" );
static_assert( sizeof( u64 ) == sizeof( s64 ), "sizeof(u64) != sizeof(s64)" );

static_assert( sizeof( u8 ) == 1, "sizeof(u8) != 1" );
static_assert( sizeof( u16 ) == 2, "sizeof(u16) != 2" );
static_assert( sizeof( u32 ) == 4, "sizeof(u32) != 4" );
static_assert( sizeof( u64 ) == 8, "sizeof(u64) != 8" );

typedef size_t    uw;
typedef ptrdiff_t sw;

static_assert( sizeof( uw ) == sizeof( sw ), "sizeof(uw) != sizeof(sw)" );

// NOTE: (u)zpl_intptr is only here for semantic reasons really as this library will only support 32/64 bit OSes.
#if defined( _WIN64 )
typedef signed __int64   sptr;
typedef unsigned __int64 uptr;
#elif defined( _WIN32 )
// NOTE; To mark types changing their size, e.g. zpl_intptr
#ifndef _W64
#if ! defined( __midl ) && ( defined( _X86_ ) || defined( _M_IX86 ) ) && _MSC_VER >= 1300
#define _W64 __w64
#else
#define _W64
#endif
#endif
typedef _W64 signed int   sptr;
typedef _W64 unsigned int uptr;
#else
typedef uintptr_t uptr;
typedef intptr_t  sptr;
#endif

static_assert( sizeof( uptr ) == sizeof( sptr ), "sizeof(uptr) != sizeof(sptr)" );

typedef float  f32;
typedef double f64;

static_assert( sizeof( f32 ) == 4, "sizeof(f32) != 4" );
static_assert( sizeof( f64 ) == 8, "sizeof(f64) != 8" );

typedef s8  b8;
typedef s16 b16;
typedef s32 b32;

#pragma endregion Basic Types

#pragma region Debug

#if defined( _MSC_VER )
#if _MSC_VER < 1300
#define GEN_DEBUG_TRAP() __asm int 3 /* Trap to debugger! */
#else
#define GEN_DEBUG_TRAP() __debugbreak()
#endif
#elif defined( GEN_COMPILER_TINYC )
#define GEN_DEBUG_TRAP() process_exit( 1 )
#else
#define GEN_DEBUG_TRAP() __builtin_trap()
#endif

#define GEN_ASSERT( cond ) GEN_ASSERT_MSG( cond, NULL )

#define GEN_ASSERT_MSG( cond, msg, ... )                                                     \
	do                                                                                       \
	{                                                                                        \
		if ( ! ( cond ) )                                                                    \
		{                                                                                    \
			assert_handler( #cond, __FILE__, zpl_cast( s64 ) __LINE__, msg, ##__VA_ARGS__ ); \
			GEN_DEBUG_TRAP();                                                                \
		}                                                                                    \
	} while ( 0 )

#define GEN_ASSERT_NOT_NULL( ptr ) GEN_ASSERT_MSG( ( ptr ) != NULL, #ptr " must not be NULL" )

// NOTE: Things that shouldn't happen with a message!
#define GEN_PANIC( msg, ... ) GEN_ASSERT_MSG( 0, msg, ##__VA_ARGS__ )

void assert_handler( char const* condition, char const* file, s32 line, char const* msg, ... );
s32  assert_crash( char const* condition );
void process_exit( u32 code );

#if Build_Debug
#define GEN_FATAL( ... )                                                  \
	do                                                                    \
	{                                                                     \
		local_persist thread_local char buf[ GEN_PRINTF_MAXLEN ] = { 0 }; \
                                                                          \
		str_fmt( buf, GEN_PRINTF_MAXLEN, __VA_ARGS__ );                   \
		GEN_PANIC( buf );                                                 \
	} while ( 0 )
#else

#define GEN_FATAL( ... )                \
	do                                  \
	{                                   \
		str_fmt_out_err( __VA_ARGS__ ); \
		process_exit( 1 );              \
	} while ( 0 )
#endif

#pragma endregion Debug

#pragma region Memory

#define kilobytes( x )     ( ( x ) * ( s64 )( 1024 ) )
#define megabytes( x )     ( kilobytes( x ) * ( s64 )( 1024 ) )
#define gigabytes( x )     ( megabytes( x ) * ( s64 )( 1024 ) )
#define terabytes( x )     ( gigabytes( x ) * ( s64 )( 1024 ) )

#define GEN__ONES          ( zpl_cast( uw ) - 1 / GEN_U8_MAX )
#define GEN__HIGHS         ( GEN__ONES * ( GEN_U8_MAX / 2 + 1 ) )
#define GEN__HAS_ZERO( x ) ( ( ( x )-GEN__ONES ) & ~( x )&GEN__HIGHS )

//! Checks if value is power of 2.
GEN_DEF_INLINE b32 is_power_of_two( sw x );

//! Aligns address to specified alignment.
GEN_DEF_INLINE void* align_forward( void* ptr, sw alignment );

//! Aligns value to a specified alignment.
GEN_DEF_INLINE s64 align_forward_i64( s64 value, sw alignment );

//! Moves pointer forward by bytes.
GEN_DEF_INLINE void* pointer_add( void* ptr, sw bytes );

//! Moves pointer forward by bytes.
GEN_DEF_INLINE void const* pointer_add_const( void const* ptr, sw bytes );

//! Calculates difference between two addresses.
GEN_DEF_INLINE sw pointer_diff( void const* begin, void const* end );

//! Copy non-overlapping memory from source to destination.
void* mem_copy( void* dest, void const* source, sw size );

//! Search for a constant value within the size limit at memory location.
void const* mem_find( void const* data, u8 byte_value, sw size );

//! Copy memory from source to destination.
GEN_DEF_INLINE void* mem_move( void* dest, void const* source, sw size );

//! Set constant value at memory location with specified size.
GEN_DEF_INLINE void* mem_set( void* data, u8 byte_value, sw size );

//! @param ptr Memory location to clear up.
//! @param size The size to clear up with.
GEN_DEF_INLINE void zero_size( void* ptr, sw size );

//! Clears up an item.
#define zero_item( t ) zero_size( ( t ), size_of( *( t ) ) )    // NOTE: Pass pointer of struct

//! Clears up an array.
#define zero_array( a, count ) zero_size( ( a ), size_of( *( a ) ) * count )

enum AllocType : u8
{
	EAllocation_ALLOC,
	EAllocation_FREE,
	EAllocation_FREE_ALL,
	EAllocation_RESIZE,
};

using AllocatorProc = void*( void* allocator_data, AllocType type, sw size, sw alignment, void* old_memory, sw old_size, u64 flags );

struct AllocatorInfo
{
	AllocatorProc* Proc;
	void*          Data;
};

enum AllocFlag
{
	ALLOCATOR_FLAG_CLEAR_TO_ZERO = bit( 0 ),
};

#ifndef GEN_DEFAULT_MEMORY_ALIGNMENT
#define GEN_DEFAULT_MEMORY_ALIGNMENT ( 2 * size_of( void* ) )
#endif

#ifndef GEN_DEFAULT_ALLOCATOR_FLAGS
#define GEN_DEFAULT_ALLOCATOR_FLAGS ( ALLOCATOR_FLAG_CLEAR_TO_ZERO )
#endif

//! Allocate memory with default alignment.
GEN_DEF_INLINE void* alloc( AllocatorInfo a, sw size );

//! Allocate memory with specified alignment.
GEN_DEF_INLINE void* alloc_align( AllocatorInfo a, sw size, sw alignment );

//! Free allocated memory.
GEN_DEF_INLINE void free( AllocatorInfo a, void* ptr );

//! Free all memory allocated by an allocator.
GEN_DEF_INLINE void free_all( AllocatorInfo a );

//! Resize an allocated memory.
GEN_DEF_INLINE void* resize( AllocatorInfo a, void* ptr, sw old_size, sw new_size );

//! Resize an allocated memory with specified alignment.
GEN_DEF_INLINE void* resize_align( AllocatorInfo a, void* ptr, sw old_size, sw new_size, sw alignment );

//! Allocate memory for an item.
#define alloc_item( allocator_, Type ) ( Type* )alloc( allocator_, size_of( Type ) )

//! Allocate memory for an array of items.
#define alloc_array( allocator_, Type, count ) ( Type* )alloc( allocator_, size_of( Type ) * ( count ) )

/* heap memory analysis tools */
/* define GEN_HEAP_ANALYSIS to enable this feature */
/* call zpl_heap_stats_init at the beginning of the entry point */
/* you can call zpl_heap_stats_check near the end of the execution to validate any possible leaks */
void heap_stats_init( void );
sw   heap_stats_used_memory( void );
sw   heap_stats_alloc_count( void );
void heap_stats_check( void );

//! Allocate/Resize memory using default options.

//! Use this if you don't need a "fancy" resize allocation
GEN_DEF_INLINE void* default_resize_align( AllocatorInfo a, void* ptr, sw old_size, sw new_size, sw alignment );

void* heap_allocator_proc( void* allocator_data, AllocType type, sw size, sw alignment, void* old_memory, sw old_size, u64 flags );

//! The heap allocator backed by operating system's memory manager.
constexpr AllocatorInfo heap( void )
{
	return { heap_allocator_proc, nullptr };
}

//! Helper to allocate memory using heap allocator.
#define malloc( sz ) alloc( heap(), sz )

//! Helper to free memory allocated by heap allocator.
#define mfree( ptr ) free( heap(), ptr )

GEN_IMPL_INLINE b32 is_power_of_two( sw x )
{
	if ( x <= 0 )
		return false;
	return ! ( x & ( x - 1 ) );
}

GEN_IMPL_INLINE void* align_forward( void* ptr, sw alignment )
{
	uptr p;

	GEN_ASSERT( is_power_of_two( alignment ) );

	p = zpl_cast( uptr ) ptr;
	return zpl_cast( void* )( ( p + ( alignment - 1 ) ) & ~( alignment - 1 ) );
}

GEN_IMPL_INLINE s64 align_forward_i64( s64 value, sw alignment )
{
	return value + ( alignment - value % alignment ) % alignment;
}

GEN_IMPL_INLINE void* pointer_add( void* ptr, sw bytes )
{
	return zpl_cast( void* )( zpl_cast( u8* ) ptr + bytes );
}

GEN_IMPL_INLINE void const* pointer_add_const( void const* ptr, sw bytes )
{
	return zpl_cast( void const* )( zpl_cast( u8 const* ) ptr + bytes );
}

GEN_IMPL_INLINE sw pointer_diff( void const* begin, void const* end )
{
	return zpl_cast( sw )( zpl_cast( u8 const* ) end - zpl_cast( u8 const* ) begin );
}

GEN_IMPL_INLINE void* mem_move( void* dest, void const* source, sw n )
{
	if ( dest == NULL )
	{
		return NULL;
	}

	u8*       d = zpl_cast( u8* ) dest;
	u8 const* s = zpl_cast( u8 const* ) source;

	if ( d == s )
		return d;
	if ( s + n <= d || d + n <= s )    // NOTE: Non-overlapping
		return mem_copy( d, s, n );

	if ( d < s )
	{
		if ( zpl_cast( uptr ) s % size_of( sw ) == zpl_cast( uptr ) d % size_of( sw ) )
		{
			while ( zpl_cast( uptr ) d % size_of( sw ) )
			{
				if ( ! n-- )
					return dest;
				*d++ = *s++;
			}
			while ( n >= size_of( sw ) )
			{
				*zpl_cast( sw* ) d  = *zpl_cast( sw* ) s;
				n                  -= size_of( sw );
				d                  += size_of( sw );
				s                  += size_of( sw );
			}
		}
		for ( ; n; n-- )
			*d++ = *s++;
	}
	else
	{
		if ( ( zpl_cast( uptr ) s % size_of( sw ) ) == ( zpl_cast( uptr ) d % size_of( sw ) ) )
		{
			while ( zpl_cast( uptr )( d + n ) % size_of( sw ) )
			{
				if ( ! n-- )
					return dest;
				d[ n ] = s[ n ];
			}
			while ( n >= size_of( sw ) )
			{
				n                         -= size_of( sw );
				*zpl_cast( sw* )( d + n )  = *zpl_cast( sw* )( s + n );
			}
		}
		while ( n )
			n--, d[ n ] = s[ n ];
	}

	return dest;
}

GEN_IMPL_INLINE void* mem_set( void* dest, u8 c, sw n )
{
	if ( dest == NULL )
	{
		return NULL;
	}

	u8* s = zpl_cast( u8* ) dest;
	sw  k;
	u32 c32 = ( ( u32 )-1 ) / 255 * c;

	if ( n == 0 )
		return dest;
	s[ 0 ] = s[ n - 1 ] = c;
	if ( n < 3 )
		return dest;
	s[ 1 ] = s[ n - 2 ] = c;
	s[ 2 ] = s[ n - 3 ] = c;
	if ( n < 7 )
		return dest;
	s[ 3 ] = s[ n - 4 ] = c;
	if ( n < 9 )
		return dest;

	k                               = -zpl_cast( sptr ) s & 3;
	s                              += k;
	n                              -= k;
	n                              &= -4;

	*zpl_cast( u32* )( s + 0 )      = c32;
	*zpl_cast( u32* )( s + n - 4 )  = c32;
	if ( n < 9 )
		return dest;
	*zpl_cast( u32* )( s + 4 )      = c32;
	*zpl_cast( u32* )( s + 8 )      = c32;
	*zpl_cast( u32* )( s + n - 12 ) = c32;
	*zpl_cast( u32* )( s + n - 8 )  = c32;
	if ( n < 25 )
		return dest;
	*zpl_cast( u32* )( s + 12 )      = c32;
	*zpl_cast( u32* )( s + 16 )      = c32;
	*zpl_cast( u32* )( s + 20 )      = c32;
	*zpl_cast( u32* )( s + 24 )      = c32;
	*zpl_cast( u32* )( s + n - 28 )  = c32;
	*zpl_cast( u32* )( s + n - 24 )  = c32;
	*zpl_cast( u32* )( s + n - 20 )  = c32;
	*zpl_cast( u32* )( s + n - 16 )  = c32;

	k                                = 24 + ( zpl_cast( uptr ) s & 4 );
	s                               += k;
	n                               -= k;

	{
		u64 c64 = ( zpl_cast( u64 ) c32 << 32 ) | c32;
		while ( n > 31 )
		{
			*zpl_cast( u64* )( s + 0 )   = c64;
			*zpl_cast( u64* )( s + 8 )   = c64;
			*zpl_cast( u64* )( s + 16 )  = c64;
			*zpl_cast( u64* )( s + 24 )  = c64;

			n                           -= 32;
			s                           += 32;
		}
	}

	return dest;
}

GEN_IMPL_INLINE void* alloc_align( AllocatorInfo a, sw size, sw alignment )
{
	return a.Proc( a.Data, EAllocation_ALLOC, size, alignment, nullptr, 0, GEN_DEFAULT_ALLOCATOR_FLAGS );
}

GEN_IMPL_INLINE void* alloc( AllocatorInfo a, sw size )
{
	return alloc_align( a, size, GEN_DEFAULT_MEMORY_ALIGNMENT );
}

GEN_IMPL_INLINE void free( AllocatorInfo a, void* ptr )
{
	if ( ptr != nullptr )
		a.Proc( a.Data, EAllocation_FREE, 0, 0, ptr, 0, GEN_DEFAULT_ALLOCATOR_FLAGS );
}

GEN_IMPL_INLINE void free_all( AllocatorInfo a )
{
	a.Proc( a.Data, EAllocation_FREE_ALL, 0, 0, nullptr, 0, GEN_DEFAULT_ALLOCATOR_FLAGS );
}

GEN_IMPL_INLINE void* resize( AllocatorInfo a, void* ptr, sw old_size, sw new_size )
{
	return resize_align( a, ptr, old_size, new_size, GEN_DEFAULT_MEMORY_ALIGNMENT );
}

GEN_IMPL_INLINE void* resize_align( AllocatorInfo a, void* ptr, sw old_size, sw new_size, sw alignment )
{
	return a.Proc( a.Data, EAllocation_RESIZE, new_size, alignment, ptr, old_size, GEN_DEFAULT_ALLOCATOR_FLAGS );
}

GEN_IMPL_INLINE void* default_resize_align( AllocatorInfo a, void* old_memory, sw old_size, sw new_size, sw alignment )
{
	if ( ! old_memory )
		return alloc_align( a, new_size, alignment );

	if ( new_size == 0 )
	{
		free( a, old_memory );
		return nullptr;
	}

	if ( new_size < old_size )
		new_size = old_size;

	if ( old_size == new_size )
	{
		return old_memory;
	}
	else
	{
		void* new_memory = alloc_align( a, new_size, alignment );
		if ( ! new_memory )
			return nullptr;
		mem_move( new_memory, old_memory, min( new_size, old_size ) );
		free( a, old_memory );
		return new_memory;
	}
}

GEN_IMPL_INLINE void zero_size( void* ptr, sw size )
{
	mem_set( ptr, 0, size );
}

struct VirtualMemory
{
	void* data;
	sw    size;
};

//! Initialize virtual memory from existing data.
VirtualMemory vm_from_memory( void* data, sw size );

//! Allocate virtual memory at address with size.

//! @param addr The starting address of the region to reserve. If NULL, it lets operating system to decide where to allocate it.
//! @param size The size to serve.
VirtualMemory vm_alloc( void* addr, sw size );

//! Release the virtual memory.
b32 vm_free( VirtualMemory vm );

//! Trim virtual memory.
VirtualMemory vm_trim( VirtualMemory vm, sw lead_size, sw size );

//! Purge virtual memory.
b32 gen_vm_purge( VirtualMemory vm );

//! Retrieve VM's page size and alignment.
sw gen_virtual_memory_page_size( sw* alignment_out );

struct Arena
{
	static void* allocator_proc( void* allocator_data, AllocType type, sw size, sw alignment, void* old_memory, sw old_size, u64 flags );

	static Arena init_from_memory( void* start, sw size )
	{
		return {
			{nullptr, nullptr},
			start,
			size,
			0,
			0
		};
	}

	static Arena init_from_allocator( AllocatorInfo backing, sw size )
	{
		Arena result = { backing, alloc( backing, size ), size, 0, 0 };
		return result;
	}

	static Arena init_sub( Arena& parent, sw size )
	{
		return init_from_allocator( parent.Backing, size );
	}

	sw alignment_of( sw alignment )
	{
		sw alignment_offset, result_pointer, mask;
		GEN_ASSERT( is_power_of_two( alignment ) );

		alignment_offset = 0;
		result_pointer   = ( sw )PhysicalStart + TotalUsed;
		mask             = alignment - 1;

		if ( result_pointer & mask )
			alignment_offset = alignment - ( result_pointer & mask );

		return alignment_offset;
	}

	void check()
	{
		GEN_ASSERT( TempCount == 0 );
	}

	void free()
	{
		if ( Backing.Proc )
		{
			gen::free( Backing, PhysicalStart );
			PhysicalStart = nullptr;
		}
	}

	sw size_remaining( sw alignment )
	{
		sw result = TotalSize - ( TotalUsed + alignment_of( alignment ) );
		return result;
	}

	AllocatorInfo Backing;
	void*         PhysicalStart;
	sw            TotalSize;
	sw            TotalUsed;
	sw            TempCount;

	operator AllocatorInfo()
	{
		return { allocator_proc, this };
	}
};

// Just a wrapper around using an arena with memory associated with its scope instead of from an allocator.
// Used for static segment or stack allocations.
template< s32 Size >
struct FixedArena
{
	static FixedArena init()
	{
		FixedArena result = { Arena::init_from_memory( result.memory, Size ), { 0 } };
		return result;
	}

	sw size_remaining( sw alignment )
	{
		return arena.size_remaining( alignment );
	}

	operator AllocatorInfo()
	{
		return { Arena::allocator_proc, &arena };
	}

	Arena arena;
	char  memory[ Size ];
};

using Arena_1KB   = FixedArena< kilobytes( 1 ) >;
using Arena_4KB   = FixedArena< kilobytes( 4 ) >;
using Arena_8KB   = FixedArena< kilobytes( 8 ) >;
using Arena_16KB  = FixedArena< kilobytes( 16 ) >;
using Arena_32KB  = FixedArena< kilobytes( 32 ) >;
using Arena_64KB  = FixedArena< kilobytes( 64 ) >;
using Arena_128KB = FixedArena< kilobytes( 128 ) >;
using Arena_256KB = FixedArena< kilobytes( 256 ) >;
using Arena_512KB = FixedArena< kilobytes( 512 ) >;
using Arena_1MB   = FixedArena< megabytes( 1 ) >;
using Arena_2MB   = FixedArena< megabytes( 2 ) >;
using Arena_4MB   = FixedArena< megabytes( 4 ) >;

struct Pool
{
	static void* allocator_proc( void* allocator_data, AllocType type, sw size, sw alignment, void* old_memory, sw old_size, u64 flags );

	static Pool init( AllocatorInfo backing, sw num_blocks, sw block_size )
	{
		return init_align( backing, num_blocks, block_size, GEN_DEFAULT_MEMORY_ALIGNMENT );
	}

	static Pool init_align( AllocatorInfo backing, sw num_blocks, sw block_size, sw block_align );

	void clear();

	void free()
	{
		if ( Backing.Proc )
		{
			gen::free( Backing, PhysicalStart );
		}
	}

	AllocatorInfo Backing;
	void*         PhysicalStart;
	void*         FreeList;
	sw            BlockSize;
	sw            BlockAlign;
	sw            TotalSize;
	sw            NumBlocks;

	operator AllocatorInfo()
	{
		return { allocator_proc, this };
	}
};

#pragma endregion Memory

#pragma region String Ops

GEN_DEF_INLINE const char* char_first_occurence( const char* str, char c );
constexpr auto             str_find = &char_first_occurence;

GEN_DEF_INLINE b32  char_is_alpha( char c );
GEN_DEF_INLINE b32  char_is_alphanumeric( char c );
GEN_DEF_INLINE b32  char_is_digit( char c );
GEN_DEF_INLINE b32  char_is_hex_digit( char c );
GEN_DEF_INLINE b32  char_is_space( char c );
GEN_DEF_INLINE char char_to_lower( char c );
GEN_DEF_INLINE char char_to_upper( char c );

GEN_DEF_INLINE s32 digit_to_int( char c );
GEN_DEF_INLINE s32 hex_digit_to_int( char c );

GEN_DEF_INLINE s32         str_compare( const char* s1, const char* s2 );
GEN_DEF_INLINE s32         str_compare( const char* s1, const char* s2, sw len );
GEN_DEF_INLINE char*       str_copy( char* dest, const char* source, sw len );
GEN_DEF_INLINE sw          str_copy_nulpad( char* dest, const char* source, sw len );
GEN_DEF_INLINE sw          str_len( const char* str );
GEN_DEF_INLINE sw          str_len( const char* str, sw max_len );
GEN_DEF_INLINE char*       str_reverse( char* str );    // NOTE: ASCII only
GEN_DEF_INLINE char const* str_skip( char const* str, char c );
GEN_DEF_INLINE char const* str_skip_any( char const* str, char const* char_list );
GEN_DEF_INLINE char const* str_trim( char const* str, b32 catch_newline );

// NOTE: ASCII only
GEN_DEF_INLINE void str_to_lower( char* str );
GEN_DEF_INLINE void str_to_upper( char* str );

s64  str_to_i64( const char* str, char** end_ptr, s32 base );
void i64_to_str( s64 value, char* string, s32 base );
void u64_to_str( u64 value, char* string, s32 base );
f64  str_to_f64( const char* str, char** end_ptr );

GEN_IMPL_INLINE const char* char_first_occurence( const char* s, char c )
{
	char ch = c;
	for ( ; *s != ch; s++ )
	{
		if ( *s == '\0' )
			return NULL;
	}
	return s;
}

GEN_IMPL_INLINE b32 char_is_alpha( char c )
{
	if ( ( c >= 'A' && c <= 'Z' ) || ( c >= 'a' && c <= 'z' ) )
		return true;
	return false;
}

GEN_IMPL_INLINE b32 char_is_alphanumeric( char c )
{
	return char_is_alpha( c ) || char_is_digit( c );
}

GEN_IMPL_INLINE b32 char_is_digit( char c )
{
	if ( c >= '0' && c <= '9' )
		return true;
	return false;
}

GEN_IMPL_INLINE b32 char_is_hex_digit( char c )
{
	if ( char_is_digit( c ) || ( c >= 'a' && c <= 'f' ) || ( c >= 'A' && c <= 'F' ) )
		return true;
	return false;
}

GEN_IMPL_INLINE b32 char_is_space( char c )
{
	if ( c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '\f' || c == '\v' )
		return true;
	return false;
}

GEN_IMPL_INLINE char char_to_lower( char c )
{
	if ( c >= 'A' && c <= 'Z' )
		return 'a' + ( c - 'A' );
	return c;
}

GEN_IMPL_INLINE char char_to_upper( char c )
{
	if ( c >= 'a' && c <= 'z' )
		return 'A' + ( c - 'a' );
	return c;
}

GEN_IMPL_INLINE s32 digit_to_int( char c )
{
	return char_is_digit( c ) ? c - '0' : c - 'W';
}

GEN_IMPL_INLINE s32 hex_digit_to_int( char c )
{
	if ( char_is_digit( c ) )
		return digit_to_int( c );
	else if ( is_between( c, 'a', 'f' ) )
		return c - 'a' + 10;
	else if ( is_between( c, 'A', 'F' ) )
		return c - 'A' + 10;
	return -1;
}

GEN_IMPL_INLINE s32 str_compare( const char* s1, const char* s2 )
{
	while ( *s1 && ( *s1 == *s2 ) )
	{
		s1++, s2++;
	}
	return *( u8* )s1 - *( u8* )s2;
}

GEN_IMPL_INLINE s32 str_compare( const char* s1, const char* s2, sw len )
{
	for ( ; len > 0; s1++, s2++, len-- )
	{
		if ( *s1 != *s2 )
			return ( ( s1 < s2 ) ? -1 : +1 );
		else if ( *s1 == '\0' )
			return 0;
	}
	return 0;
}

GEN_IMPL_INLINE char* str_copy( char* dest, const char* source, sw len )
{
	GEN_ASSERT_NOT_NULL( dest );
	if ( source )
	{
		char* str = dest;
		while ( len > 0 && *source )
		{
			*str++ = *source++;
			len--;
		}
		while ( len > 0 )
		{
			*str++ = '\0';
			len--;
		}
	}
	return dest;
}

GEN_IMPL_INLINE sw str_copy_nulpad( char* dest, const char* source, sw len )
{
	sw result = 0;
	GEN_ASSERT_NOT_NULL( dest );
	if ( source )
	{
		const char* source_start = source;
		char*       str          = dest;
		while ( len > 0 && *source )
		{
			*str++ = *source++;
			len--;
		}
		while ( len > 0 )
		{
			*str++ = '\0';
			len--;
		}

		result = source - source_start;
	}
	return result;
}

GEN_IMPL_INLINE sw str_len( const char* str )
{
	if ( str == NULL )
	{
		return 0;
	}
	const char* p = str;
	while ( *str )
		str++;
	return str - p;
}

GEN_IMPL_INLINE sw str_len( const char* str, sw max_len )
{
	const char* end = zpl_cast( const char* ) mem_find( str, 0, max_len );
	if ( end )
		return end - str;
	return max_len;
}

GEN_IMPL_INLINE char* str_reverse( char* str )
{
	sw    len  = str_len( str );
	char* a    = str + 0;
	char* b    = str + len - 1;
	len       /= 2;
	while ( len-- )
	{
		swap( *a, *b );
		a++, b--;
	}
	return str;
}

GEN_IMPL_INLINE char const* str_skip( char const* str, char c )
{
	while ( *str && *str != c )
	{
		++str;
	}
	return str;
}

GEN_IMPL_INLINE char const* str_skip_any( char const* str, char const* char_list )
{
	char const* closest_ptr     = zpl_cast( char const* ) pointer_add( ( void* )str, str_len( str ) );
	sw          char_list_count = str_len( char_list );
	for ( sw i = 0; i < char_list_count; i++ )
	{
		char const* p = str_skip( str, char_list[ i ] );
		closest_ptr   = min( closest_ptr, p );
	}
	return closest_ptr;
}

GEN_IMPL_INLINE char const* str_trim( char const* str, b32 catch_newline )
{
	while ( *str && char_is_space( *str ) && ( ! catch_newline || ( catch_newline && *str != '\n' ) ) )
	{
		++str;
	}
	return str;
}

GEN_IMPL_INLINE void str_to_lower( char* str )
{
	if ( ! str )
		return;
	while ( *str )
	{
		*str = char_to_lower( *str );
		str++;
	}
}

GEN_IMPL_INLINE void str_to_upper( char* str )
{
	if ( ! str )
		return;
	while ( *str )
	{
		*str = char_to_upper( *str );
		str++;
	}
}

#pragma endregion String Ops

#pragma region Printing

struct FileInfo;

#ifndef GEN_PRINTF_MAXLEN
#define GEN_PRINTF_MAXLEN kilobytes( 128 )
#endif

// NOTE: A locally persisting buffer is used internally
char* str_fmt_buf( char const* fmt, ... );
char* str_fmt_buf_va( char const* fmt, va_list va );
sw    str_fmt( char* str, sw n, char const* fmt, ... );
sw    str_fmt_va( char* str, sw n, char const* fmt, va_list va );
sw    str_fmt_out_va( char const* fmt, va_list va );
sw    str_fmt_out_err( char const* fmt, ... );
sw    str_fmt_out_err_va( char const* fmt, va_list va );
sw    str_fmt_file( FileInfo* f, char const* fmt, ... );
sw    str_fmt_file_va( FileInfo* f, char const* fmt, va_list va );

constexpr char const* Msg_Invalid_Value = "INVALID VALUE PROVIDED";

inline sw log_fmt( char const* fmt, ... )
{
	sw      res;
	va_list va;

	va_start( va, fmt );
	res = str_fmt_out_va( fmt, va );
	va_end( va );

	return res;
}

#pragma endregion Printing

#pragma region Containers

template< class Type >
struct Array
{
	struct Header
	{
		AllocatorInfo Allocator;
		uw            Capacity;
		uw            Num;
	};

	static Array init( AllocatorInfo allocator )
	{
		return init_reserve( allocator, grow_formula( 0 ) );
	}

	static Array init_reserve( AllocatorInfo allocator, sw capacity )
	{
		Header* header = rcast( Header*, alloc( allocator, sizeof( Header ) + sizeof( Type ) * capacity ) );

		if ( header == nullptr )
			return { nullptr };

		header->Allocator = allocator;
		header->Capacity  = capacity;
		header->Num       = 0;

		return { rcast( Type*, header + 1 ) };
	}

	static uw grow_formula( uw value )
	{
		return 2 * value + 8;
	}

	bool append( Type value )
	{
		Header* header = get_header();

		if ( header->Num == header->Capacity )
		{
			if ( ! grow( header->Capacity ) )
				return false;

			header = get_header();
		}

		Data[ header->Num ] = value;
		header->Num++;

		return true;
	}

	bool append( Type* items, uw item_num )
	{
		Header* header = get_header();

		if ( header->Num + item_num > header->Capacity )
		{
			if ( ! grow( header->Capacity + item_num ) )
				return false;

			header = get_header();
		}

		mem_copy( Data + header->Num, items, item_num * sizeof( Type ) );
		header->Num += item_num;

		return true;
	}

	bool append_at( Type item, uw idx )
	{
		Header* header = get_header();

		if ( idx >= header->Num )
			idx = header->Num - 1;

		if ( idx < 0 )
			idx = 0;

		if ( header->Capacity < header->Num + 1 )
		{
			if ( ! grow( header->Capacity + 1 ) )
				return false;

			header = get_header();
		}

		Type* target = Data + idx;

		mem_move( target + 1, target, ( header->Num - idx ) * sizeof( Type ) );
		header->Num++;

		return true;
	}

	bool append_at( Type* items, uw item_num, uw idx )
	{
		Header* header = get_header();

		if ( idx >= header->Num )
		{
			return append( items, item_num );
		}

		if ( item_num > header->Capacity )
		{
			if ( ! grow( header->Capacity + item_num ) )
				return false;

			header = get_header();
		}

		Type* target = Data + idx + item_num;
		Type* src    = Data + idx;

		mem_move( target, src, ( header->Num - idx ) * sizeof( Type ) );
		mem_copy( src, items, item_num * sizeof( Type ) );
		header->Num += item_num;

		return true;
	}

	Type& back( void )
	{
		Header& header = *get_header();
		return Data[ header.Num - 1 ];
	}

	void clear( void )
	{
		Header& header = *get_header();
		header.Num     = 0;
	}

	bool fill( uw begin, uw end, Type value )
	{
		Header& header = *get_header();

		if ( begin < 0 || end >= header.Num )
			return false;

		for ( sw idx = begin; idx < end; idx++ )
		{
			Data[ idx ] = value;
		}

		return true;
	}

	void free( void )
	{
		Header& header = *get_header();
		gen::free( header.Allocator, &header );
		Data = nullptr;
	}

	Header* get_header( void )
	{
		return rcast( Header*, Data ) - 1;
	}

	bool grow( uw min_capacity )
	{
		Header& header       = *get_header();
		uw      new_capacity = grow_formula( header.Capacity );

		if ( new_capacity < min_capacity )
			new_capacity = min_capacity;

		return set_capacity( new_capacity );
	}

	uw num( void )
	{
		return get_header()->Num;
	}

	bool pop( void )
	{
		Header& header = *get_header();

		GEN_ASSERT( header.Num > 0 );
		header.Num--;
	}

	void remove_at( uw idx )
	{
		Header* header = get_header();
		GEN_ASSERT( idx < header->Num );

		mem_move( header + idx, header + idx + 1, sizeof( Type ) * ( header->Num - idx - 1 ) );
		header->Num--;
	}

	bool reserve( uw new_capacity )
	{
		Header& header = *get_header();

		if ( header.Capacity < new_capacity )
			return set_capacity( new_capacity );

		return true;
	}

	bool resize( uw num )
	{
		Header* header = get_header();

		if ( header->Capacity < num )
		{
			if ( ! grow( num ) )
				return false;

			header = get_header();
		}

		header->Num = num;
		return true;
	}

	bool set_capacity( uw new_capacity )
	{
		Header& header = *get_header();

		if ( new_capacity == header.Capacity )
			return true;

		if ( new_capacity < header.Num )
			header.Num = new_capacity;

		sw      size       = sizeof( Header ) + sizeof( Type ) * new_capacity;
		Header* new_header = rcast( Header*, alloc( header.Allocator, size ) );

		if ( new_header == nullptr )
			return false;

		mem_move( new_header, &header, sizeof( Header ) + sizeof( Type ) * header.Num );

		new_header->Capacity = new_capacity;

		gen::free( header.Allocator, &header );

		Data = rcast( Type*, new_header + 1 );
		return true;
	}

	Type* Data;

	operator Type*()
	{
		return Data;
	}

	operator Type const*() const
	{
		return Data;
	}

	// For-range based support

	Type* begin()
	{
		return Data;
	}

	Type* end()
	{
		return Data + get_header()->Num;
	}
};

template< typename Type >
struct HashTable
{
	struct FindResult
	{
		sw HashIndex;
		sw PrevIndex;
		sw EntryIndex;
	};

	struct Entry
	{
		u64  Key;
		sw   Next;
		Type Value;
	};

	static HashTable init( AllocatorInfo allocator )
	{
		HashTable< Type > result = { { nullptr }, { nullptr } };

		result.Hashes            = Array< sw >::init( allocator );
		result.Entries           = Array< Entry >::init( allocator );

		return result;
	}

	static HashTable init_reserve( AllocatorInfo allocator, uw num )
	{
		HashTable< Type > result        = { { nullptr }, { nullptr } };

		result.Hashes                   = Array< sw >::init_reserve( allocator, num );
		result.Hashes.get_header()->Num = num;

		result.Entries                  = Array< Entry >::init_reserve( allocator, num );

		return result;
	}

	void clear( void )
	{
		for ( sw idx = 0; idx < Hashes.num(); idx++ )
			Hashes[ idx ] = -1;

		Hashes.clear();
		Entries.clear();
	}

	void destroy( void )
	{
		if ( Hashes && Hashes.get_header()->Capacity )
		{
			Hashes.free();
			Entries.free();
		}
	}

	Type* get( u64 key )
	{
		sw idx = find( key ).EntryIndex;
		if ( idx >= 0 )
			return &Entries[ idx ].Value;

		return nullptr;
	}

	using MapProc = void ( * )( u64 key, Type value );

	void map( MapProc map_proc )
	{
		GEN_ASSERT_NOT_NULL( map_proc );

		for ( sw idx = 0; idx < Entries.num(); idx++ )
		{
			map_proc( Entries[ idx ].Key, Entries[ idx ].Value );
		}
	}

	using MapMutProc = void ( * )( u64 key, Type* value );

	void map_mut( MapMutProc map_proc )
	{
		GEN_ASSERT_NOT_NULL( map_proc );

		for ( sw idx = 0; idx < Entries.num(); idx++ )
		{
			map_proc( Entries[ idx ].Key, &Entries[ idx ].Value );
		}
	}

	void grow()
	{
		sw new_num = Array< Entry >::grow_formula( Entries.num() );
		rehash( new_num );
	}

	void rehash( sw new_num )
	{
		sw idx;
		sw last_added_index;

		HashTable< Type > new_ht         = init_reserve( Hashes.get_header()->Allocator, new_num );

		Array< sw >::Header* hash_header = new_ht.Hashes.get_header();

		for ( idx = 0; idx < new_ht.Hashes.num(); ++idx )
			new_ht.Hashes[ idx ] = -1;

		for ( idx = 0; idx < Entries.num(); ++idx )
		{
			Entry& entry = Entries[ idx ];

			FindResult find_result;

			if ( new_ht.Hashes.num() == 0 )
				new_ht.grow();

			entry            = Entries[ idx ];
			find_result      = new_ht.find( entry.Key );
			last_added_index = new_ht.add_entry( entry.Key );

			if ( find_result.PrevIndex < 0 )
				new_ht.Hashes[ find_result.HashIndex ] = last_added_index;

			else
				new_ht.Entries[ find_result.PrevIndex ].Next = last_added_index;

			new_ht.Entries[ last_added_index ].Next  = find_result.EntryIndex;
			new_ht.Entries[ last_added_index ].Value = entry.Value;
		}

		destroy();
		*this = new_ht;
	}

	void rehash_fast()
	{
		sw idx;

		for ( idx = 0; idx < Entries.num(); idx++ )
			Entries[ idx ].Next = -1;

		for ( idx = 0; idx < Hashes.num(); idx++ )
			Hashes[ idx ] = -1;

		for ( idx = 0; idx < Entries.num(); idx++ )
		{
			Entry*     entry;
			FindResult find_result;

			entry       = &Entries[ idx ];
			find_result = find( entry->Key );

			if ( find_result.PrevIndex < 0 )
				Hashes[ find_result.HashIndex ] = idx;
			else
				Entries[ find_result.PrevIndex ].Next = idx;
		}
	}

	void remove( u64 key )
	{
		FindResult find_result = find( key );

		if ( find_result.EntryIndex >= 0 )
		{
			Entries.remove_at( find_result.EntryIndex );
			rehash_fast();
		}
	}

	void remove_entry( sw idx )
	{
		Entries.remove_at( idx );
	}

	void set( u64 key, Type value )
	{
		sw         idx;
		FindResult find_result;

		if ( Hashes.num() == 0 )
			grow();

		find_result = find( key );

		if ( find_result.EntryIndex >= 0 )
		{
			idx = find_result.EntryIndex;
		}
		else
		{
			idx = add_entry( key );

			if ( find_result.PrevIndex >= 0 )
			{
				Entries[ find_result.PrevIndex ].Next = idx;
			}
			else
			{
				Hashes[ find_result.HashIndex ] = idx;
			}
		}

		Entries[ idx ].Value = value;

		if ( full() )
			grow();
	}

	sw slot( u64 key )
	{
		for ( sw idx = 0; idx < Hashes.num(); ++idx )
			if ( Hashes[ idx ] == key )
				return idx;

		return -1;
	}

	Array< sw >    Hashes;
	Array< Entry > Entries;

protected:
	sw add_entry( u64 key )
	{
		sw    idx;
		Entry entry = { key, -1 };

		idx         = Entries.num();
		Entries.append( entry );
		return idx;
	}

	FindResult find( u64 key )
	{
		FindResult result = { -1, -1, -1 };

		if ( Hashes.num() > 0 )
		{
			result.HashIndex  = key % Hashes.num();
			result.EntryIndex = Hashes[ result.HashIndex ];

			while ( result.EntryIndex >= 0 )
			{
				if ( Entries[ result.EntryIndex ].Key == key )
					break;

				result.PrevIndex  = result.EntryIndex;
				result.EntryIndex = Entries[ result.EntryIndex ].Next;
			}
		}

		return result;
	}

	b32 full()
	{
		return 0.75f * Hashes.num() < Entries.num();
	}
};

#pragma endregion Containers

#pragma region Hashing

u32 crc32( void const* data, sw len );
u64 crc64( void const* data, sw len );

#pragma endregion Hashing

#pragma region Strings

// Constant string with length.
struct StrC
{
	sw          Len;
	char const* Ptr;

	operator char const*() const
	{
		return Ptr;
	}
};

#define cast_to_strc( str ) *rcast( StrC*, str - sizeof( sw ) )
#define txt( text )              \
	StrC                         \
	{                            \
		sizeof( text ) - 1, text \
	}

StrC to_str( char const* str )
{
	return { str_len( str ), str };
}

// Dynamic String
// This is directly based off the ZPL string api.
// They used a header pattern
// I kept it for simplicty of porting but its not necessary to keep it that way.
struct String
{
	struct Header
	{
		AllocatorInfo Allocator;
		sw            Capacity;
		sw            Length;
	};

	static uw grow_formula( uw value )
	{
		// Using a very aggressive growth formula to reduce time mem_copying with recursive calls to append in this library.
		return 4 * value + 8;
	}

	static String make( AllocatorInfo allocator, char const* str )
	{
		sw length = str ? str_len( str ) : 0;
		return make_length( allocator, str, length );
	}

	static String make( AllocatorInfo allocator, StrC str )
	{
		return make_length( allocator, str.Ptr, str.Len );
	}

	static String make_reserve( AllocatorInfo allocator, sw capacity );

	static String make_length( AllocatorInfo allocator, char const* str, sw length );

	static String fmt( AllocatorInfo allocator, char* buf, sw buf_size, char const* fmt, ... );

	static String fmt_buf( AllocatorInfo allocator, char const* fmt, ... );

	static String join( AllocatorInfo allocator, char const** parts, sw num_parts, char const* glue )
	{
		String result = make( allocator, "" );

		for ( sw idx = 0; idx < num_parts; ++idx )
		{
			result.append( parts[ idx ] );

			if ( idx < num_parts - 1 )
				result.append( glue );
		}

		return result;
	}

	static bool are_equal( String lhs, String rhs )
	{
		if ( lhs.length() != rhs.length() )
			return false;

		for ( sw idx = 0; idx < lhs.length(); ++idx )
			if ( lhs[ idx ] != rhs[ idx ] )
				return false;

		return true;
	}

	bool make_space_for( char const* str, sw add_len );

	bool append( char c )
	{
		return append( &c, 1 );
	}

	bool append( char const* str )
	{
		return append( str, str_len( str ) );
	}

	bool append( char const* str, sw length )
	{
		if ( sptr( str ) > 0 )
		{
			sw curr_len = this->length();

			if ( ! make_space_for( str, length ) )
				return false;

			Header& header = get_header();

			mem_copy( Data + curr_len, str, length );

			Data[ curr_len + length ] = '\0';

			header.Length             = curr_len + length;
		}
		return str;
	}

	bool append( StrC str )
	{
		return append( str.Ptr, str.Len );
	}

	bool append( const String other )
	{
		return append( other.Data, other.length() );
	}

	bool append_fmt( char const* fmt, ... );

	sw avail_space() const
	{
		Header const& header = *rcast( Header const*, Data - sizeof( Header ) );

		return header.Capacity - header.Length;
	}

	char& back()
	{
		return Data[ length() - 1 ];
	}

	sw capacity() const
	{
		Header const& header = *rcast( Header const*, Data - sizeof( Header ) );

		return header.Capacity;
	}

	void clear()
	{
		get_header().Length = 0;
	}

	String duplicate( AllocatorInfo allocator )
	{
		return make_length( allocator, Data, length() );
	}

	void free()
	{
		if ( ! Data )
			return;

		Header& header = get_header();

		gen::free( header.Allocator, &header );
	}

	Header& get_header()
	{
		return *( Header* )( Data - sizeof( Header ) );
	}

	sw length() const
	{
		Header const& header = *rcast( Header const*, Data - sizeof( Header ) );

		return header.Length;
	}

	void skip_line()
	{
#define current ( *scanner )
		char* scanner = Data;
		while ( current != '\r' && current != '\n' )
		{
			++scanner;
		}

		s32 new_length = scanner - Data;

		if ( current == '\r' )
		{
			new_length += 1;
		}

		mem_move( Data, scanner, new_length );

		Header* header = &get_header();
		header->Length = new_length;
#undef current
	}

	void strip_space()
	{
		char* write_pos = Data;
		char* read_pos  = Data;

		while ( *read_pos )
		{
			if ( ! char_is_space( *read_pos ) )
			{
				*write_pos = *read_pos;
				write_pos++;
			}
			read_pos++;
		}

		write_pos[ 0 ] = '\0';    // Null-terminate the modified string

		// Update the length if needed
		get_header().Length = write_pos - Data;
	}

	void trim( char const* cut_set )
	{
		sw len          = 0;

		char* start_pos = Data;
		char* end_pos   = Data + length() - 1;

		while ( start_pos <= end_pos && char_first_occurence( cut_set, *start_pos ) )
			start_pos++;

		while ( end_pos > start_pos && char_first_occurence( cut_set, *end_pos ) )
			end_pos--;

		len = scast( sw, ( start_pos > end_pos ) ? 0 : ( ( end_pos - start_pos ) + 1 ) );

		if ( Data != start_pos )
			mem_move( Data, start_pos, len );

		Data[ len ]         = '\0';

		get_header().Length = len;
	}

	void trim_space()
	{
		return trim( " \t\r\n\v\f" );
	}

	// Debug function that provides a copy of the string with whitespace characters visualized.
	String visualize_whitespace() const
	{
		Header* header = ( Header* )( Data - sizeof( Header ) );

		String result  = make_reserve( header->Allocator, length() * 2 );    // Assume worst case for space requirements.

		for ( char c : *this )
		{
			switch ( c )
			{
				case ' ' :
					result.append( txt( "·" ) );
					break;
				case '\t' :
					result.append( txt( "→" ) );
					break;
				case '\n' :
					result.append( txt( "↵" ) );
					break;
				case '\r' :
					result.append( txt( "⏎" ) );
					break;
				case '\v' :
					result.append( txt( "⇕" ) );
					break;
				case '\f' :
					result.append( txt( "⌂" ) );
					break;
				default :
					result.append( c );
					break;
			}
		}

		return result;
	}

	// For-range support

	char* begin() const
	{
		return Data;
	}

	char* end() const
	{
		Header const& header = *rcast( Header const*, Data - sizeof( Header ) );

		return Data + header.Length;
	}

	operator bool()
	{
		return Data;
	}

	operator char*()
	{
		return Data;
	}

	operator char const*() const
	{
		return Data;
	}

	operator StrC() const
	{
		return { length(), Data };
	}

	// Used with cached strings
	// Essentially makes the string a string view.
	String const& operator=( String const& other ) const
	{
		if ( this == &other )
			return *this;

		String& this_ = ccast( String, *this );

		this_.Data    = other.Data;

		return this_;
	}

	char& operator[]( sw index )
	{
		return Data[ index ];
	}

	char const& operator[]( sw index ) const
	{
		return Data[ index ];
	}

	char* Data;
};

struct String_POD
{
	char* Data;
};

static_assert( sizeof( String_POD ) == sizeof( String ), "String is not a POD" );

// Implements basic string interning. Data structure is based off the ZPL Hashtable.
using StringTable = HashTable< String const >;

// Represents strings cached with the string table.
// Should never be modified, if changed string is desired, cache_string( str ) another.
using StringCached = String const;

#pragma endregion Strings

#pragma region File Handling

typedef u32 FileMode;

enum FileModeFlag
{
	EFileMode_READ   = bit( 0 ),
	EFileMode_WRITE  = bit( 1 ),
	EFileMode_APPEND = bit( 2 ),
	EFileMode_RW     = bit( 3 ),
	GEN_FILE_MODES   = EFileMode_READ | EFileMode_WRITE | EFileMode_APPEND | EFileMode_RW,
};

// NOTE: Only used internally and for the file operations
enum SeekWhenceType
{
	ESeekWhence_BEGIN   = 0,
	ESeekWhence_CURRENT = 1,
	ESeekWhence_END     = 2,
};

enum FileError
{
	EFileError_NONE,
	EFileError_INVALID,
	EFileError_INVALID_FILENAME,
	EFileError_EXISTS,
	EFileError_NOT_EXISTS,
	EFileError_PERMISSION,
	EFileError_TRUNCATION_FAILURE,
	EFileError_NOT_EMPTY,
	EFileError_NAME_TOO_LONG,
	EFileError_UNKNOWN,
};

union FileDescriptor
{
	void* p;
	sptr  i;
	uptr  u;
};

typedef struct FileOperations FileOperations;

#define GEN_FILE_OPEN_PROC( name )     FileError name( FileDescriptor* fd, FileOperations* ops, FileMode mode, char const* filename )
#define GEN_FILE_READ_AT_PROC( name )  b32 name( FileDescriptor fd, void* buffer, sw size, s64 offset, sw* bytes_read, b32 stop_at_newline )
#define GEN_FILE_WRITE_AT_PROC( name ) b32 name( FileDescriptor fd, void const* buffer, sw size, s64 offset, sw* bytes_written )
#define GEN_FILE_SEEK_PROC( name )     b32 name( FileDescriptor fd, s64 offset, SeekWhenceType whence, s64* new_offset )
#define GEN_FILE_CLOSE_PROC( name )    void name( FileDescriptor fd )

typedef GEN_FILE_OPEN_PROC( file_open_proc );
typedef GEN_FILE_READ_AT_PROC( FileReadProc );
typedef GEN_FILE_WRITE_AT_PROC( FileWriteProc );
typedef GEN_FILE_SEEK_PROC( FileSeekProc );
typedef GEN_FILE_CLOSE_PROC( FileCloseProc );

struct FileOperations
{
	FileReadProc*  read_at;
	FileWriteProc* write_at;
	FileSeekProc*  seek;
	FileCloseProc* close;
};

extern FileOperations const default_file_operations;

typedef u64 FileTime;

enum DirType
{
	GEN_DIR_TYPE_FILE,
	GEN_DIR_TYPE_FOLDER,
	GEN_DIR_TYPE_UNKNOWN,
};

struct DirInfo;

struct DirEntry
{
	char const*     filename;
	struct DirInfo* dir_info;
	u8              type;
};

struct DirInfo
{
	char const* fullpath;
	DirEntry*   entries;    // zpl_array

	// Internals
	char** filenames;    // zpl_array
	String buf;
};

struct FileInfo
{
	FileOperations ops;
	FileDescriptor fd;
	b32            is_temp;

	char const* filename;
	FileTime    last_write_time;
	DirEntry*   dir;
};

enum FileStandardType
{
	EFileStandard_INPUT,
	EFileStandard_OUTPUT,
	EFileStandard_ERROR,

	EFileStandard_COUNT,
};

/**
 * Get standard file I/O.
 * @param  std Check zpl_file_standard_type
 * @return     File handle to standard I/O
 */
FileInfo* file_get_standard( FileStandardType std );

/**
 * Closes the file
 * @param  file
 */
FileError file_close( FileInfo* file );

/**
 * Returns the currently opened file's name
 * @param  file
 */
inline char const* file_name( FileInfo* file )
{
	return file->filename ? file->filename : "";
}

/**
 * Opens a file
 * @param  file
 * @param  filename
 */
FileError file_open( FileInfo* file, char const* filename );

/**
 * Opens a file using a specified mode
 * @param  file
 * @param  mode     Access mode to use
 * @param  filename
 */
FileError file_open_mode( FileInfo* file, FileMode mode, char const* filename );

/**
 * Reads from a file
 * @param  file
 * @param  buffer Buffer to read to
 * @param  size   Size to read
 */
GEN_DEF_INLINE b32 file_read( FileInfo* file, void* buffer, sw size );

/**
 * Reads file at a specific offset
 * @param  file
 * @param  buffer     Buffer to read to
 * @param  size       Size to read
 * @param  offset     Offset to read from
 * @param  bytes_read How much data we've actually read
 */
GEN_DEF_INLINE b32 file_read_at( FileInfo* file, void* buffer, sw size, s64 offset );

/**
 * Reads file safely
 * @param  file
 * @param  buffer     Buffer to read to
 * @param  size       Size to read
 * @param  offset     Offset to read from
 * @param  bytes_read How much data we've actually read
 */
GEN_DEF_INLINE b32 file_read_at_check( FileInfo* file, void* buffer, sw size, s64 offset, sw* bytes_read );

struct FileContents
{
	AllocatorInfo allocator;
	void*         data;
	sw            size;
};

constexpr b32 zero_terminate    = true;
constexpr b32 no_zero_terminate = false;

/**
 * Reads the whole file contents
 * @param  a              Allocator to use
 * @param  zero_terminate End the read data with null terminator
 * @param  filepath       Path to the file
 * @return                File contents data
 */
FileContents file_read_contents( AllocatorInfo a, b32 zero_terminate, char const* filepath );

/**
 * Returns a size of the file
 * @param  file
 * @return      File size
 */
s64 file_size( FileInfo* file );

/**
 * Seeks the file cursor from the beginning of file to a specific position
 * @param  file
 * @param  offset Offset to seek to
 */
GEN_DEF_INLINE s64 file_seek( FileInfo* file, s64 offset );

/**
 * Seeks the file cursor to the end of the file
 * @param  file
 */
GEN_DEF_INLINE s64 file_seek_to_end( FileInfo* file );

/**
 * Returns the length from the beginning of the file we've read so far
 * @param  file
 * @return      Our current position in file
 */
GEN_DEF_INLINE s64 file_tell( FileInfo* file );

/**
 * Writes to a file
 * @param  file
 * @param  buffer Buffer to read from
 * @param  size   Size to read
 */
GEN_DEF_INLINE b32 file_write( FileInfo* file, void const* buffer, sw size );

/**
 * Writes to file at a specific offset
 * @param  file
 * @param  buffer        Buffer to read from
 * @param  size          Size to write
 * @param  offset        Offset to write to
 * @param  bytes_written How much data we've actually written
 */
GEN_DEF_INLINE b32 file_write_at( FileInfo* file, void const* buffer, sw size, s64 offset );

/**
 * Writes to file safely
 * @param  file
 * @param  buffer        Buffer to read from
 * @param  size          Size to write
 * @param  offset        Offset to write to
 * @param  bytes_written How much data we've actually written
 */
GEN_DEF_INLINE b32 file_write_at_check( FileInfo* file, void const* buffer, sw size, s64 offset, sw* bytes_written );

GEN_IMPL_INLINE s64 file_seek( FileInfo* f, s64 offset )
{
	s64 new_offset = 0;

	if ( ! f->ops.read_at )
		f->ops = default_file_operations;

	f->ops.seek( f->fd, offset, ESeekWhence_BEGIN, &new_offset );

	return new_offset;
}

GEN_IMPL_INLINE s64 file_seek_to_end( FileInfo* f )
{
	s64 new_offset = 0;

	if ( ! f->ops.read_at )
		f->ops = default_file_operations;

	f->ops.seek( f->fd, 0, ESeekWhence_END, &new_offset );

	return new_offset;
}

GEN_IMPL_INLINE s64 file_tell( FileInfo* f )
{
	s64 new_offset = 0;

	if ( ! f->ops.read_at )
		f->ops = default_file_operations;

	f->ops.seek( f->fd, 0, ESeekWhence_CURRENT, &new_offset );

	return new_offset;
}

GEN_IMPL_INLINE b32 file_read( FileInfo* f, void* buffer, sw size )
{
	s64 cur_offset = file_tell( f );
	b32 result     = file_read_at( f, buffer, size, file_tell( f ) );
	file_seek( f, cur_offset + size );
	return result;
}

GEN_IMPL_INLINE b32 file_read_at( FileInfo* f, void* buffer, sw size, s64 offset )
{
	return file_read_at_check( f, buffer, size, offset, NULL );
}

GEN_IMPL_INLINE b32 file_read_at_check( FileInfo* f, void* buffer, sw size, s64 offset, sw* bytes_read )
{
	if ( ! f->ops.read_at )
		f->ops = default_file_operations;
	return f->ops.read_at( f->fd, buffer, size, offset, bytes_read, false );
}

GEN_IMPL_INLINE b32 file_write( FileInfo* f, void const* buffer, sw size )
{
	s64 cur_offset = file_tell( f );
	b32 result     = file_write_at( f, buffer, size, file_tell( f ) );

	file_seek( f, cur_offset + size );

	return result;
}

GEN_IMPL_INLINE b32 file_write_at( FileInfo* f, void const* buffer, sw size, s64 offset )
{
	return file_write_at_check( f, buffer, size, offset, NULL );
}

GEN_IMPL_INLINE b32 file_write_at_check( FileInfo* f, void const* buffer, sw size, s64 offset, sw* bytes_written )
{
	if ( ! f->ops.read_at )
		f->ops = default_file_operations;

	return f->ops.write_at( f->fd, buffer, size, offset, bytes_written );
}

enum FileStreamFlags : u32
{
	/* Allows us to write to the buffer directly. Beware: you can not append a new data! */
	EFileStream_WRITABLE = bit( 0 ),

	/* Clones the input buffer so you can write (zpl_file_write*) data into it. */
	/* Since we work with a clone, the buffer size can dynamically grow as well. */
	EFileStream_CLONE_WRITABLE = bit( 1 ),
};

/**
 * Opens a new memory stream
 * @param file
 * @param allocator
 */
b8 file_stream_new( FileInfo* file, AllocatorInfo allocator );

/**
 * Opens a memory stream over an existing buffer
 * @param  file
 * @param  allocator
 * @param  buffer   Memory to create stream from
 * @param  size     Buffer's size
 * @param  flags
 */
b8 file_stream_open( FileInfo* file, AllocatorInfo allocator, u8* buffer, sw size, FileStreamFlags flags );

/**
 * Retrieves the stream's underlying buffer and buffer size.
 * @param file memory stream
 * @param size (Optional) buffer size
 */
u8* file_stream_buf( FileInfo* file, sw* size );

extern FileOperations const memory_file_operations;

#pragma endregion File Handling

#pragma region Timing

#ifdef GEN_BENCHMARK
//! Return CPU timestamp.
u64 read_cpu_time_stamp_counter( void );

//! Return relative time (in seconds) since the application start.
f64 time_rel( void );

//! Return relative time since the application start.
u64 time_rel_ms( void );
#endif

#pragma endregion Timing

#pragma region Parsing

#pragma region ADT

enum ADT_Type : u32
{
	EADT_TYPE_UNINITIALISED, /* node was not initialised, this is a programming error! */
	EADT_TYPE_ARRAY,
	EADT_TYPE_OBJECT,
	EADT_TYPE_STRING,
	EADT_TYPE_MULTISTRING,
	EADT_TYPE_INTEGER,
	EADT_TYPE_REAL,
};

enum ADT_Props : u32
{
	EADT_PROPS_NONE,
	EADT_PROPS_NAN,
	EADT_PROPS_NAN_NEG,
	EADT_PROPS_INFINITY,
	EADT_PROPS_INFINITY_NEG,
	EADT_PROPS_FALSE,
	EADT_PROPS_TRUE,
	EADT_PROPS_NULL,
	EADT_PROPS_IS_EXP,
	EADT_PROPS_IS_HEX,

	// Used internally so that people can fill in real numbers they plan to write.
	EADT_PROPS_IS_PARSED_REAL,
};

enum ADT_NamingStyle : u32
{
	EADT_NAME_STYLE_DOUBLE_QUOTE,
	EADT_NAME_STYLE_SINGLE_QUOTE,
	EADT_NAME_STYLE_NO_QUOTES,
};

enum ADT_AssignStyle : u32
{
	EADT_ASSIGN_STYLE_COLON,
	EADT_ASSIGN_STYLE_EQUALS,
	EADT_ASSIGN_STYLE_LINE,
};

enum ADT_DelimStyle : u32
{
	EADT_DELIM_STYLE_COMMA,
	EADT_DELIM_STYLE_LINE,
	EADT_DELIM_STYLE_NEWLINE,
};

enum ADT_Error : u32
{
	EADT_ERROR_NONE,
	EADT_ERROR_INTERNAL,
	EADT_ERROR_ALREADY_CONVERTED,
	EADT_ERROR_INVALID_TYPE,
	EADT_ERROR_OUT_OF_MEMORY,
};

struct ADT_Node
{
	char const*      name;
	struct ADT_Node* parent;

	/* properties */
	ADT_Type type  : 4;
	u8       props : 4;
#ifndef GEN_PARSER_DISABLE_ANALYSIS
	u8 cfg_mode          : 1;
	u8 name_style        : 2;
	u8 assign_style      : 2;
	u8 delim_style       : 2;
	u8 delim_line_width  : 4;
	u8 assign_line_width : 4;
#endif

	/* adt data */
	union
	{
		char const*       string;
		Array< ADT_Node > nodes;    ///< zpl_array

		struct
		{
			union
			{
				f64 real;
				s64 integer;
			};

#ifndef GEN_PARSER_DISABLE_ANALYSIS
			/* number analysis */
			s32 base;
			s32 base2;
			u8  base2_offset : 4;
			s8  exp          : 4;
			u8  neg_zero     : 1;
			u8  lead_digit   : 1;
#endif
		};
	};
};

/* ADT NODE LIMITS
 * delimiter and assignment segment width is limited to 128 whitespace symbols each.
 * real number limits decimal position to 128 places.
 * real number exponent is limited to 64 digits.
 */

/**
 * @brief Initialise an ADT object or array
 *
 * @param node
 * @param backing Memory allocator used for descendants
 * @param name Node's name
 * @param is_array
 * @return error code
 */
u8 adt_make_branch( ADT_Node* node, AllocatorInfo backing, char const* name, b32 is_array );

/**
 * @brief Destroy an ADT branch and its descendants
 *
 * @param node
 * @return error code
 */
u8 adt_destroy_branch( ADT_Node* node );

/**
 * @brief Initialise an ADT leaf
 *
 * @param node
 * @param name Node's name
 * @param type Node's type (use zpl_adt_make_branch for container nodes)
 * @return error code
 */
u8 adt_make_leaf( ADT_Node* node, char const* name, ADT_Type type );


/**
 * @brief Fetch a node using provided URI string.
 *
 * This method uses a basic syntax to fetch a node from the ADT. The following features are available
 * to retrieve the data:
 *
 * - "a/b/c" navigates through objects "a" and "b" to get to "c"
 * - "arr/[foo=123]/bar" iterates over "arr" to find any object with param "foo" that matches the value "123", then gets its field called "bar"
 * - "arr/3" retrieves the 4th element in "arr"
 * - "arr/[apple]" retrieves the first element of value "apple" in "arr"
 *
 * @param node ADT node
 * @param uri Locator string as described above
 * @return zpl_adt_node*
 *
 * @see code/apps/examples/json_get.c
 */
ADT_Node* adt_query( ADT_Node* node, char const* uri );

/**
 * @brief Find a field node within an object by the given name.
 *
 * @param node
 * @param name
 * @param deep_search Perform search recursively
 * @return zpl_adt_node * node
 */
ADT_Node* adt_find( ADT_Node* node, char const* name, b32 deep_search );

/**
 * @brief Allocate an unitialised node within a container at a specified index.
 *
 * @param parent
 * @param index
 * @return zpl_adt_node * node
 */
ADT_Node* adt_alloc_at( ADT_Node* parent, sw index );

/**
 * @brief Allocate an unitialised node within a container.
 *
 * @param parent
 * @return zpl_adt_node * node
 */
ADT_Node* adt_alloc( ADT_Node* parent );

/**
 * @brief Move an existing node to a new container at a specified index.
 *
 * @param node
 * @param new_parent
 * @param index
 * @return zpl_adt_node * node
 */
ADT_Node* adt_move_node_at( ADT_Node* node, ADT_Node* new_parent, sw index );

/**
 * @brief Move an existing node to a new container.
 *
 * @param node
 * @param new_parent
 * @return zpl_adt_node * node
 */
ADT_Node* adt_move_node( ADT_Node* node, ADT_Node* new_parent );

/**
 * @brief Swap two nodes.
 *
 * @param node
 * @param other_node
 * @return
 */
void adt_swap_nodes( ADT_Node* node, ADT_Node* other_node );

/**
 * @brief Remove node from container.
 *
 * @param node
 * @return
 */
void adt_remove_node( ADT_Node* node );

/**
 * @brief Initialise a node as an object
 *
 * @param obj
 * @param name
 * @param backing
 * @return
 */
b8 adt_set_obj( ADT_Node* obj, char const* name, AllocatorInfo backing );

/**
 * @brief Initialise a node as an array
 *
 * @param obj
 * @param name
 * @param backing
 * @return
 */
b8 adt_set_arr( ADT_Node* obj, char const* name, AllocatorInfo backing );

/**
 * @brief Initialise a node as a string
 *
 * @param obj
 * @param name
 * @param value
 * @return
 */
b8 adt_set_str( ADT_Node* obj, char const* name, char const* value );

/**
 * @brief Initialise a node as a float
 *
 * @param obj
 * @param name
 * @param value
 * @return
 */
b8 adt_set_flt( ADT_Node* obj, char const* name, f64 value );

/**
 * @brief Initialise a node as a signed integer
 *
 * @param obj
 * @param name
 * @param value
 * @return
 */
b8 adt_set_int( ADT_Node* obj, char const* name, s64 value );

/**
 * @brief Append a new node to a container as an object
 *
 * @param parent
 * @param name
 * @return*
 */
ADT_Node* adt_append_obj( ADT_Node* parent, char const* name );

/**
 * @brief Append a new node to a container as an array
 *
 * @param parent
 * @param name
 * @return*
 */
ADT_Node* adt_append_arr( ADT_Node* parent, char const* name );

/**
 * @brief Append a new node to a container as a string
 *
 * @param parent
 * @param name
 * @param value
 * @return*
 */
ADT_Node* adt_append_str( ADT_Node* parent, char const* name, char const* value );

/**
 * @brief Append a new node to a container as a float
 *
 * @param parent
 * @param name
 * @param value
 * @return*
 */
ADT_Node* adt_append_flt( ADT_Node* parent, char const* name, f64 value );

/**
 * @brief Append a new node to a container as a signed integer
 *
 * @param parent
 * @param name
 * @param value
 * @return*
 */
ADT_Node* adt_append_int( ADT_Node* parent, char const* name, s64 value );

/* parser helpers */

/**
 * @brief Parses a text and stores the result into an unitialised node.
 *
 * @param node
 * @param base
 * @return*
 */
char* adt_parse_number( ADT_Node* node, char* base );

/**
 * @brief Parses a text and stores the result into an unitialised node.
 * This function expects the entire input to be a number.
 *
 * @param node
 * @param base
 * @return*
 */
char* adt_parse_number_strict( ADT_Node* node, char* base_str );

/**
 * @brief Parses and converts an existing string node into a number.
 *
 * @param node
 * @return
 */
ADT_Error adt_str_to_number( ADT_Node* node );

/**
 * @brief Parses and converts an existing string node into a number.
 * This function expects the entire input to be a number.
 *
 * @param node
 * @return
 */
ADT_Error adt_str_to_number_strict( ADT_Node* node );

/**
 * @brief Prints a number into a file stream.
 *
 * The provided file handle can also be a memory mapped stream.
 *
 * @see zpl_file_stream_new
 * @param file
 * @param node
 * @return
 */
ADT_Error adt_print_number( FileInfo* file, ADT_Node* node );

/**
 * @brief Prints a string into a file stream.
 *
 * The provided file handle can also be a memory mapped stream.
 *
 * @see zpl_file_stream_new
 * @param file
 * @param node
 * @param escaped_chars
 * @param escape_symbol
 * @return
 */
ADT_Error adt_print_string( FileInfo* file, ADT_Node* node, char const* escaped_chars, char const* escape_symbol );

#pragma endregion ADT

#pragma region CSV

enum CSV_Error : u32
{
	ECSV_Error__NONE,
	ECSV_Error__INTERNAL,
	ECSV_Error__UNEXPECTED_END_OF_INPUT,
	ECSV_Error__MISMATCHED_ROWS,
};

typedef ADT_Node CSV_Object;

GEN_DEF_INLINE u8 csv_parse( CSV_Object* root, char* text, AllocatorInfo allocator, b32 has_header );
u8                csv_parse_delimiter( CSV_Object* root, char* text, AllocatorInfo allocator, b32 has_header, char delim );
void              csv_free( CSV_Object* obj );

GEN_DEF_INLINE void   csv_write( FileInfo* file, CSV_Object* obj );
GEN_DEF_INLINE String csv_write_string( AllocatorInfo a, CSV_Object* obj );
void                  csv_write_delimiter( FileInfo* file, CSV_Object* obj, char delim );
String                csv_write_string_delimiter( AllocatorInfo a, CSV_Object* obj, char delim );

/* inline */

GEN_IMPL_INLINE u8 csv_parse( CSV_Object* root, char* text, AllocatorInfo allocator, b32 has_header )
{
	return csv_parse_delimiter( root, text, allocator, has_header, ',' );
}

GEN_IMPL_INLINE void csv_write( FileInfo* file, CSV_Object* obj )
{
	csv_write_delimiter( file, obj, ',' );
}

GEN_IMPL_INLINE String csv_write_string( AllocatorInfo a, CSV_Object* obj )
{
	return csv_write_string_delimiter( a, obj, ',' );
}

#pragma endregion CSV

#pragma endregion Parsing

GEN_NS_END

// GEN_ROLL_OWN_DEPENDENCIES
#endif

GEN_NS_BEGIN

#pragma region Types

using LogFailType = sw ( * )( char const*, ... );

// By default this library will either crash or exit if an error is detected while generating codes.
// Even if set to not use GEN_FATAL, GEN_FATAL will still be used for memory failures as the library is unusable when they occur.
#ifdef GEN_DONT_USE_FATAL
#define log_failure log_fmt
#else
#define log_failure GEN_FATAL
#endif

enum class AccessSpec : u32
{
	Default,
	Public,
	Protected,
	Private,

	Num_AccessSpec,
	Invalid,
};

inline char const* to_str( AccessSpec type )
{
	local_persist char const* lookup[ ( u32 )AccessSpec::Num_AccessSpec ] = {
		"",
		"public",
		"protected",
		"private",
	};

	if ( type > AccessSpec::Public )
		return "Invalid";

	return lookup[ ( u32 )type ];
}

enum CodeFlag : u32
{
	FunctionType  = bit( 0 ),
	ParamPack     = bit( 1 ),
	Module_Export = bit( 2 ),
	Module_Import = bit( 3 ),
};

// Used to indicate if enum definitoin is an enum class or regular enum.
enum class EnumT : u8
{
	Regular,
	Class
};

constexpr EnumT EnumClass   = EnumT::Class;
constexpr EnumT EnumRegular = EnumT::Regular;

enum class ModuleFlag : u32
{
	None   = 0,
	Export = bit( 0 ),
	Import = bit( 1 ),

	Num_ModuleFlags,
	Invalid,
};

StrC to_str( ModuleFlag flag )
{
	local_persist StrC lookup[ ( u32 )ModuleFlag::Num_ModuleFlags ] = {
		{sizeof( "__none__" ), "__none__"},
		{ sizeof( "export" ),  "export"  },
		{ sizeof( "import" ),  "import"  },
	};

	if ( flag > ModuleFlag::Import )
		return { sizeof( "invalid" ), "invalid" };

	return lookup[ ( u32 )flag ];
}

ModuleFlag operator|( ModuleFlag A, ModuleFlag B )
{
	return ( ModuleFlag )( ( u32 )A | ( u32 )B );
}

enum class EPreprocessCond : u32
{
	If,
	IfDef,
	IfNotDef,
	ElIf
};

constexpr EPreprocessCond PreprocessCond_If       = EPreprocessCond::If;
constexpr EPreprocessCond PreprocessCond_IfDef    = EPreprocessCond::IfDef;
constexpr EPreprocessCond PreprocessCond_IfNotDef = EPreprocessCond::IfNotDef;
constexpr EPreprocessCond PreprocessCond_ElIf     = EPreprocessCond::ElIf;

namespace ECode
{
	enum Type : u32
	{
		Invalid,
		Untyped,
		NewLine,
		Comment,
		Access_Private,
		Access_Protected,
		Access_Public,
		PlatformAttributes,
		Class,
		Class_Fwd,
		Class_Body,
		Constructor,
		Constructor_Fwd,
		Destructor,
		Destructor_Fwd,
		Enum,
		Enum_Fwd,
		Enum_Body,
		Enum_Class,
		Enum_Class_Fwd,
		Execution,
		Export_Body,
		Extern_Linkage,
		Extern_Linkage_Body,
		Friend,
		Function,
		Function_Fwd,
		Function_Body,
		Global_Body,
		Module,
		Namespace,
		Namespace_Body,
		Operator,
		Operator_Fwd,
		Operator_Member,
		Operator_Member_Fwd,
		Operator_Cast,
		Operator_Cast_Fwd,
		Parameters,
		Preprocess_Define,
		Preprocess_Include,
		Preprocess_If,
		Preprocess_IfDef,
		Preprocess_IfNotDef,
		Preprocess_ElIf,
		Preprocess_Else,
		Preprocess_EndIf,
		Preprocess_Pragma,
		Specifiers,
		Struct,
		Struct_Fwd,
		Struct_Body,
		Template,
		Typedef,
		Typename,
		Union,
		Union_Body,
		Using,
		Using_Namespace,
		Variable,
		NumTypes
	};

	StrC to_str( Type type )
	{
		local_persist StrC lookup[] {
			{sizeof( "Invalid" ),              "Invalid"            },
			{ sizeof( "Untyped" ),             "Untyped"            },
			{ sizeof( "NewLine" ),             "NewLine"            },
			{ sizeof( "Comment" ),             "Comment"            },
			{ sizeof( "Access_Private" ),      "Access_Private"     },
			{ sizeof( "Access_Protected" ),    "Access_Protected"   },
			{ sizeof( "Access_Public" ),       "Access_Public"      },
			{ sizeof( "PlatformAttributes" ),  "PlatformAttributes" },
			{ sizeof( "Class" ),               "Class"              },
			{ sizeof( "Class_Fwd" ),           "Class_Fwd"          },
			{ sizeof( "Class_Body" ),          "Class_Body"         },
			{ sizeof( "Constructor" ),         "Constructor"        },
			{ sizeof( "Constructor_Fwd" ),     "Constructor_Fwd"    },
			{ sizeof( "Destructor" ),          "Destructor"         },
			{ sizeof( "Destructor_Fwd" ),      "Destructor_Fwd"     },
			{ sizeof( "Enum" ),                "Enum"               },
			{ sizeof( "Enum_Fwd" ),            "Enum_Fwd"           },
			{ sizeof( "Enum_Body" ),           "Enum_Body"          },
			{ sizeof( "Enum_Class" ),          "Enum_Class"         },
			{ sizeof( "Enum_Class_Fwd" ),      "Enum_Class_Fwd"     },
			{ sizeof( "Execution" ),           "Execution"          },
			{ sizeof( "Export_Body" ),         "Export_Body"        },
			{ sizeof( "Extern_Linkage" ),      "Extern_Linkage"     },
			{ sizeof( "Extern_Linkage_Body" ), "Extern_Linkage_Body"},
			{ sizeof( "Friend" ),              "Friend"             },
			{ sizeof( "Function" ),            "Function"           },
			{ sizeof( "Function_Fwd" ),        "Function_Fwd"       },
			{ sizeof( "Function_Body" ),       "Function_Body"      },
			{ sizeof( "Global_Body" ),         "Global_Body"        },
			{ sizeof( "Module" ),              "Module"             },
			{ sizeof( "Namespace" ),           "Namespace"          },
			{ sizeof( "Namespace_Body" ),      "Namespace_Body"     },
			{ sizeof( "Operator" ),            "Operator"           },
			{ sizeof( "Operator_Fwd" ),        "Operator_Fwd"       },
			{ sizeof( "Operator_Member" ),     "Operator_Member"    },
			{ sizeof( "Operator_Member_Fwd" ), "Operator_Member_Fwd"},
			{ sizeof( "Operator_Cast" ),       "Operator_Cast"      },
			{ sizeof( "Operator_Cast_Fwd" ),   "Operator_Cast_Fwd"  },
			{ sizeof( "Parameters" ),          "Parameters"         },
			{ sizeof( "Preprocess_Define" ),   "Preprocess_Define"  },
			{ sizeof( "Preprocess_Include" ),  "Preprocess_Include" },
			{ sizeof( "Preprocess_If" ),       "Preprocess_If"      },
			{ sizeof( "Preprocess_IfDef" ),    "Preprocess_IfDef"   },
			{ sizeof( "Preprocess_IfNotDef" ), "Preprocess_IfNotDef"},
			{ sizeof( "Preprocess_ElIf" ),     "Preprocess_ElIf"    },
			{ sizeof( "Preprocess_Else" ),     "Preprocess_Else"    },
			{ sizeof( "Preprocess_EndIf" ),    "Preprocess_EndIf"   },
			{ sizeof( "Preprocess_Pragma" ),   "Preprocess_Pragma"  },
			{ sizeof( "Specifiers" ),          "Specifiers"         },
			{ sizeof( "Struct" ),              "Struct"             },
			{ sizeof( "Struct_Fwd" ),          "Struct_Fwd"         },
			{ sizeof( "Struct_Body" ),         "Struct_Body"        },
			{ sizeof( "Template" ),            "Template"           },
			{ sizeof( "Typedef" ),             "Typedef"            },
			{ sizeof( "Typename" ),            "Typename"           },
			{ sizeof( "Union" ),               "Union"              },
			{ sizeof( "Union_Body" ),          "Union_Body"         },
			{ sizeof( "Using" ),               "Using"              },
			{ sizeof( "Using_Namespace" ),     "Using_Namespace"    },
			{ sizeof( "Variable" ),            "Variable"           },
		};
		return lookup[ type ];
	}

}    // namespace ECode

using CodeT = ECode::Type;

namespace EOperator
{
	enum Type : u32
	{
		Invalid,
		Assign,
		Assign_Add,
		Assign_Subtract,
		Assign_Multiply,
		Assign_Divide,
		Assign_Modulo,
		Assign_BAnd,
		Assign_BOr,
		Assign_BXOr,
		Assign_LShift,
		Assign_RShift,
		Increment,
		Decrement,
		Unary_Plus,
		Unary_Minus,
		UnaryNot,
		Add,
		Subtract,
		Multiply,
		Divide,
		Modulo,
		BNot,
		BAnd,
		BOr,
		BXOr,
		LShift,
		RShift,
		LAnd,
		LOr,
		LEqual,
		LNot,
		Lesser,
		Greater,
		LesserEqual,
		GreaterEqual,
		Subscript,
		Indirection,
		AddressOf,
		MemberOfPointer,
		PtrToMemOfPtr,
		FunctionCall,
		Comma,
		NumOps
	};

	StrC to_str( Type op )
	{
		local_persist StrC lookup[] {
			{sizeof( "INVALID" ), "INVALID"},
			{ sizeof( "=" ),      "="      },
			{ sizeof( "+=" ),     "+="     },
			{ sizeof( "-=" ),     "-="     },
			{ sizeof( "*=" ),     "*="     },
			{ sizeof( "/=" ),     "/="     },
			{ sizeof( "%=" ),     "%="     },
			{ sizeof( "&=" ),     "&="     },
			{ sizeof( "|=" ),     "|="     },
			{ sizeof( "^=" ),     "^="     },
			{ sizeof( "<<=" ),    "<<="    },
			{ sizeof( ">>=" ),    ">>="    },
			{ sizeof( "++" ),     "++"     },
			{ sizeof( "--" ),     "--"     },
			{ sizeof( "+" ),      "+"      },
			{ sizeof( "-" ),      "-"      },
			{ sizeof( "!" ),      "!"      },
			{ sizeof( "+" ),      "+"      },
			{ sizeof( "-" ),      "-"      },
			{ sizeof( "*" ),      "*"      },
			{ sizeof( "/" ),      "/"      },
			{ sizeof( "%" ),      "%"      },
			{ sizeof( "~" ),      "~"      },
			{ sizeof( "&" ),      "&"      },
			{ sizeof( "|" ),      "|"      },
			{ sizeof( "^" ),      "^"      },
			{ sizeof( "<<" ),     "<<"     },
			{ sizeof( ">>" ),     ">>"     },
			{ sizeof( "&&" ),     "&&"     },
			{ sizeof( "||" ),     "||"     },
			{ sizeof( "==" ),     "=="     },
			{ sizeof( "!=" ),     "!="     },
			{ sizeof( "<" ),      "<"      },
			{ sizeof( ">" ),      ">"      },
			{ sizeof( "<=" ),     "<="     },
			{ sizeof( ">=" ),     ">="     },
			{ sizeof( "[]" ),     "[]"     },
			{ sizeof( "*" ),      "*"      },
			{ sizeof( "&" ),      "&"      },
			{ sizeof( "->" ),     "->"     },
			{ sizeof( "->*" ),    "->*"    },
			{ sizeof( "()" ),     "()"     },
			{ sizeof( "," ),      ","      },
		};
		return lookup[ op ];
	}

}    // namespace EOperator

using OperatorT = EOperator::Type;

namespace ESpecifier
{
	enum Type : u32
	{
		Invalid,
		Consteval,
		Constexpr,
		Constinit,
		Explicit,
		External_Linkage,
		ForceInline,
		Global,
		Inline,
		Internal_Linkage,
		Local_Persist,
		Mutable,
		NeverInline,
		Ptr,
		Ref,
		Register,
		RValue,
		Static,
		Thread_Local,
		Volatile,
		Virtual,
		Const,
		Final,
		NoExceptions,
		Override,
		Pure,
		NumSpecifiers
	};

	bool is_trailing( Type specifier )
	{
		return specifier > Virtual;
	}

	StrC to_str( Type type )
	{
		local_persist StrC lookup[] {
			{sizeof( "INVALID" ),        "INVALID"      },
			{ sizeof( "consteval" ),     "consteval"    },
			{ sizeof( "constexpr" ),     "constexpr"    },
			{ sizeof( "constinit" ),     "constinit"    },
			{ sizeof( "explicit" ),      "explicit"     },
			{ sizeof( "extern" ),        "extern"       },
			{ sizeof( "forceinline" ),   "forceinline"  },
			{ sizeof( "global" ),        "global"       },
			{ sizeof( "inline" ),        "inline"       },
			{ sizeof( "internal" ),      "internal"     },
			{ sizeof( "local_persist" ), "local_persist"},
			{ sizeof( "mutable" ),       "mutable"      },
			{ sizeof( "neverinline" ),   "neverinline"  },
			{ sizeof( "*" ),             "*"            },
			{ sizeof( "&" ),             "&"            },
			{ sizeof( "register" ),      "register"     },
			{ sizeof( "&&" ),            "&&"           },
			{ sizeof( "static" ),        "static"       },
			{ sizeof( "thread_local" ),  "thread_local" },
			{ sizeof( "volatile" ),      "volatile"     },
			{ sizeof( "virtual" ),       "virtual"      },
			{ sizeof( "const" ),         "const"        },
			{ sizeof( "final" ),         "final"        },
			{ sizeof( "noexcept" ),      "noexcept"     },
			{ sizeof( "override" ),      "override"     },
			{ sizeof( "= 0" ),           "= 0"          },
		};
		return lookup[ type ];
	}

	Type to_type( StrC str )
	{
		local_persist u32 keymap[ NumSpecifiers ];
		do_once_start for ( u32 index = 0; index < NumSpecifiers; index++ )
		{
			StrC enum_str   = to_str( ( Type )index );
			keymap[ index ] = crc32( enum_str.Ptr, enum_str.Len - 1 );
		}
		do_once_end u32 hash = crc32( str.Ptr, str.Len );
		for ( u32 index = 0; index < NumSpecifiers; index++ )
		{
			if ( keymap[ index ] == hash )
				return ( Type )index;
		}
		return Invalid;
	}

}    // namespace ESpecifier

using SpecifierT = ESpecifier::Type;

#pragma endregion Types

#pragma region AST

struct AST;
struct AST_Body;
struct AST_Attributes;
struct AST_Comment;
struct AST_Constructor;
struct AST_Class;
struct AST_Define;
struct AST_Destructor;
struct AST_Enum;
struct AST_Exec;
struct AST_Extern;
struct AST_Include;
struct AST_Friend;
struct AST_Fn;
struct AST_Module;
struct AST_NS;
struct AST_Operator;
struct AST_OpCast;
struct AST_Param;
struct AST_Pragma;
struct AST_PreprocessCond;
struct AST_Specifiers;
struct AST_Struct;
struct AST_Template;
struct AST_Type;
struct AST_Typedef;
struct AST_Union;
struct AST_Using;
struct AST_Var;

struct Code;
struct CodeBody;
// These are to offer ease of use and optionally strong type safety for the AST.
struct CodeAttributes;
struct CodeComment;
struct CodeClass;
struct CodeConstructor;
struct CodeDefine;
struct CodeDestructor;
struct CodeEnum;
struct CodeExec;
struct CodeExtern;
struct CodeInclude;
struct CodeFriend;
struct CodeFn;
struct CodeModule;
struct CodeNS;
struct CodeOperator;
struct CodeOpCast;
struct CodeParam;
struct CodePreprocessCond;
struct CodePragma;
struct CodeSpecifiers;
struct CodeStruct;
struct CodeTemplate;
struct CodeType;
struct CodeTypedef;
struct CodeUnion;
struct CodeUsing;
struct CodeVar;

namespace Parser
{
	struct Token;
}

/*
    AST* wrapper
    - Not constantly have to append the '*' as this is written often..
    - Allows for implicit conversion to any of the ASTs (raw or filtered).
*/
struct Code
{
#pragma region Statics
	// Used to identify ASTs that should always be duplicated. (Global constant ASTs)
	static Code Global;

	// Used to identify invalid generated code.
	static Code Invalid;
#pragma endregion Statics

#define Using_Code( Typename )            \
	char const* debug_str();              \
	Code        duplicate();              \
	bool        is_equal( Code other );   \
	bool        is_valid();               \
	void        set_global();             \
	String      to_string();              \
	Typename&   operator=( AST* other );  \
	Typename&   operator=( Code other );  \
	bool        operator==( Code other ); \
	bool        operator!=( Code other ); \
	operator bool();

	Using_Code( Code );

	template< class Type >
	Type cast()
	{
		return *rcast( Type*, this );
	}

	AST* operator->()
	{
		return ast;
	}

	Code& operator++();

	auto& operator*()
	{
		return *this;
	}

	AST* ast;

#ifdef GEN_ENFORCE_STRONG_CODE_TYPES
#define operator explicit operator
#endif
	operator CodeAttributes() const;
	operator CodeComment() const;
	operator CodeConstructor() const;
	operator CodeDestructor() const;
	operator CodeClass() const;
	operator CodeDefine() const;
	operator CodeExec() const;
	operator CodeEnum() const;
	operator CodeExtern() const;
	operator CodeInclude() const;
	operator CodeFriend() const;
	operator CodeFn() const;
	operator CodeModule() const;
	operator CodeNS() const;
	operator CodeOperator() const;
	operator CodeOpCast() const;
	operator CodeParam() const;
	operator CodePragma() const;
	operator CodePreprocessCond() const;
	operator CodeSpecifiers() const;
	operator CodeStruct() const;
	operator CodeTemplate() const;
	operator CodeType() const;
	operator CodeTypedef() const;
	operator CodeUnion() const;
	operator CodeUsing() const;
	operator CodeVar() const;
	operator CodeBody() const;
#undef operator
};

struct Code_POD
{
	AST* ast;
};

static_assert( sizeof( Code ) == sizeof( Code_POD ), "ERROR: Code is not POD" );

// Desired width of the AST data structure.
constexpr int const AST_POD_Size = 128;

/*
    Simple AST POD with functionality to seralize into C++ syntax.
*/
struct AST
{
#pragma region Member Functions
	void        append( AST* other );
	char const* debug_str();
	AST*        duplicate();
	Code&       entry( u32 idx );
	bool        has_entries();
	bool        is_equal( AST* other );
	char const* type_str();
	bool        validate_body();

	neverinline String to_string();

	template< class Type >
	Type cast()
	{
		return *this;
	}

	operator Code();
	operator CodeBody();
	operator CodeAttributes();
	operator CodeComment();
	operator CodeConstructor();
	operator CodeDestructor();
	operator CodeClass();
	operator CodeDefine();
	operator CodeEnum();
	operator CodeExec();
	operator CodeExtern();
	operator CodeInclude();
	operator CodeFriend();
	operator CodeFn();
	operator CodeModule();
	operator CodeNS();
	operator CodeOperator();
	operator CodeOpCast();
	operator CodeParam();
	operator CodePragma();
	operator CodePreprocessCond();
	operator CodeSpecifiers();
	operator CodeStruct();
	operator CodeTemplate();
	operator CodeType();
	operator CodeTypedef();
	operator CodeUnion();
	operator CodeUsing();
	operator CodeVar();
#pragma endregion Member Functions

	constexpr static int ArrSpecs_Cap =
	( AST_POD_Size - sizeof( AST* ) * 3 - sizeof( Parser::Token* ) - sizeof( AST* ) - sizeof( StringCached ) - sizeof( CodeT ) - sizeof( ModuleFlag ) - sizeof( int ) )
	/ sizeof( int )
	- 1;    // -1 for 4 extra bytes

	union
	{
		struct
		{
			AST* InlineCmt;     // Class, Constructor, Destructor, Enum, Friend, Functon, Operator, OpCast, Struct, Typedef, Using, Variable
			AST* Attributes;    // Class, Enum, Function, Struct, Typedef, Union, Using, Variable
			AST* Specs;         // Destructor, Function, Operator, Typename, Variable

			union
			{
				AST* InitializerList;    // Constructor
				AST* ParentType;         // Class, Struct, ParentType->Next has a possible list of interfaces.
				AST* ReturnType;         // Function, Operator, Typename
				AST* UnderlyingType;     // Enum, Typedef
				AST* ValueType;          // Parameter, Variable
			};

			union
			{
				AST* BitfieldSize;    // Variable (Class/Struct Data Member)
				AST* Params;          // Constructor, Function, Operator, Template, Typename
			};

			union
			{
				AST* ArrExpr;        // Typename
				AST* Body;           // Class, Constructr, Destructor, Enum, Function, Namespace, Struct, Union
				AST* Declaration;    // Friend, Template
				AST* Value;          // Parameter, Variable
			};

			union
			{
				AST* NextVar;    // Variable; Possible way to handle comma separated variables declarations. ( , NextVar->Specs NextVar->Name NextVar->ArrExpr =
				                 // NextVar->Value )
				AST* SuffixSpecs;    // Only used with typenames, to store the function suffix if typename is function signature. ( May not be needed )
			};
		};

		StringCached Content;    // Attributes, Comment, Execution, Include

		struct
		{
			SpecifierT ArrSpecs[ ArrSpecs_Cap ];    // Specifiers
			AST*       NextSpecs;                   // Specifiers; If ArrSpecs is full, then NextSpecs is used.
		};
	};

	union
	{
		AST* Prev;
		AST* Front;
		AST* Last;
	};

	union
	{
		AST* Next;
		AST* Back;
	};

	Parser::Token* Token;    // Reference to starting token, only avaialble if it was derived from parsing.
	AST*           Parent;
	StringCached   Name;
	CodeT          Type;
	ModuleFlag     ModuleFlags;

	union
	{
		b32        IsFunction;     // Used by typedef to not serialize the name field.
		b32        IsParamPack;    // Used by typename to know if type should be considered a parameter pack.
		OperatorT  Op;
		AccessSpec ParentAccess;
		s32        NumEntries;
	};
};

struct AST_POD
{
	union
	{
		struct
		{
			AST* InlineCmt;     // Class, Constructor, Destructor, Enum, Friend, Functon, Operator, OpCast, Struct, Typedef, Using, Variable
			AST* Attributes;    // Class, Enum, Function, Struct, Typedef, Union, Using, Variable
			AST* Specs;         // Destructor, Function, Operator, Typename, Variable

			union
			{
				AST* InitializerList;    // Constructor
				AST* ParentType;         // Class, Struct, ParentType->Next has a possible list of interfaces.
				AST* ReturnType;         // Function, Operator, Typename
				AST* UnderlyingType;     // Enum, Typedef
				AST* ValueType;          // Parameter, Variable
			};

			union
			{
				AST* BitfieldSize;    // Variable (Class/Struct Data Member)
				AST* Params;          // Constructor, Function, Operator, Template, Typename
			};

			union
			{
				AST* ArrExpr;        // Typename
				AST* Body;           // Class, Constructr, Destructor, Enum, Function, Namespace, Struct, Union
				AST* Declaration;    // Friend, Template
				AST* Value;          // Parameter, Variable
			};

			union
			{
				AST* NextVar;    // Variable; Possible way to handle comma separated variables declarations. ( , NextVar->Specs NextVar->Name NextVar->ArrExpr =
				                 // NextVar->Value )
				AST* SuffixSpecs;    // Only used with typenames, to store the function suffix if typename is function signature. ( May not be needed )
			};
		};

		StringCached Content;    // Attributes, Comment, Execution, Include

		struct
		{
			SpecifierT ArrSpecs[ AST::ArrSpecs_Cap ];    // Specifiers
			AST*       NextSpecs;                        // Specifiers; If ArrSpecs is full, then NextSpecs is used.
		};
	};

	union
	{
		AST* Prev;
		AST* Front;
		AST* Last;
	};

	union
	{
		AST* Next;
		AST* Back;
	};

	Parser::Token* Token;    // Reference to starting token, only avaialble if it was derived from parsing.
	AST*           Parent;
	StringCached   Name;
	CodeT          Type;
	ModuleFlag     ModuleFlags;

	union
	{
		b32        IsFunction;     // Used by typedef to not serialize the name field.
		b32        IsParamPack;    // Used by typename to know if type should be considered a parameter pack.
		OperatorT  Op;
		AccessSpec ParentAccess;
		s32        NumEntries;
	};
};

struct test
{
	SpecifierT ArrSpecs[ AST::ArrSpecs_Cap ];    // Specifiers
	AST*       NextSpecs;                        // Specifiers; If ArrSpecs is full, then NextSpecs is used.
};

constexpr int pls = sizeof( test );

// Its intended for the AST to have equivalent size to its POD.
// All extra functionality within the AST namespace should just be syntatic sugar.
static_assert( sizeof( AST ) == sizeof( AST_POD ), "ERROR: AST IS NOT POD" );
static_assert( sizeof( AST_POD ) == AST_POD_Size, "ERROR: AST POD is not size of AST_POD_Size" );

// Used when the its desired when omission is allowed in a definition.
#define NoCode  \
	{           \
		nullptr \
	}
#define CodeInvalid ( *Code::Invalid.ast )    // Uses an implicitly overloaded cast from the AST to the desired code type.

#pragma region Code Types

struct CodeBody
{
	Using_Code( CodeBody );

	void append( Code other )
	{
		raw()->append( other.ast );
	}

	void append( CodeBody body )
	{
		for ( Code entry : body )
		{
			append( entry );
		}
	}

	bool has_entries()
	{
		return rcast( AST*, ast )->has_entries();
	}

	AST* raw()
	{
		return rcast( AST*, ast );
	}

	AST_Body* operator->()
	{
		return ast;
	}

	operator Code()
	{
		return *rcast( Code*, this );
	}

#pragma region Iterator

	Code begin()
	{
		if ( ast )
			return { rcast( AST*, ast )->Front };

		return { nullptr };
	}

	Code end()
	{
		return { rcast( AST*, ast )->Back->Next };
	}

#pragma endregion Iterator

	AST_Body* ast;
};

struct CodeClass
{
	Using_Code( CodeClass );

	void add_interface( CodeType interface );

	AST* raw()
	{
		return rcast( AST*, ast );
	}

	operator Code()
	{
		return *rcast( Code*, this );
	}

	AST_Class* operator->()
	{
		if ( ast == nullptr )
		{
			log_failure( "Attempt to dereference a nullptr" );
			return nullptr;
		}
		return ast;
	}

	AST_Class* ast;
};

struct CodeParam
{
	Using_Code( CodeParam );

	void append( CodeParam other );

	CodeParam get( s32 idx );
	bool      has_entries();

	AST* raw()
	{
		return rcast( AST*, ast );
	}

	AST_Param* operator->()
	{
		if ( ast == nullptr )
		{
			log_failure( "Attempt to dereference a nullptr!" );
			return nullptr;
		}
		return ast;
	}

	operator Code()
	{
		return { ( AST* )ast };
	}

#pragma region Iterator

	CodeParam begin()
	{
		if ( ast )
			return { ast };

		return { nullptr };
	}

	CodeParam end()
	{
		return { ( AST_Param* )rcast( AST*, ast )->Last };
	}

	CodeParam& operator++();

	CodeParam operator*()
	{
		return *this;
	}

#pragma endregion Iterator

	AST_Param* ast;
};

struct CodeSpecifiers
{
	Using_Code( CodeSpecifiers );

	bool append( SpecifierT spec )
	{
		if ( ast == nullptr )
		{
			log_failure( "CodeSpecifiers: Attempted to append to a null specifiers AST!" );
			return false;
		}

		if ( raw()->NumEntries == AST::ArrSpecs_Cap )
		{
			log_failure( "CodeSpecifiers: Attempted to append over %d specifiers to a specifiers AST!", AST::ArrSpecs_Cap );
			return false;
		}

		raw()->ArrSpecs[ raw()->NumEntries ] = spec;
		raw()->NumEntries++;
		return true;
	}

	s32 has( SpecifierT spec )
	{
		for ( s32 idx = 0; idx < raw()->NumEntries; idx++ )
		{
			if ( raw()->ArrSpecs[ raw()->NumEntries ] == spec )
				return idx;
		}

		return -1;
	}

	AST* raw()
	{
		return rcast( AST*, ast );
	}

	AST_Specifiers* operator->()
	{
		if ( ast == nullptr )
		{
			log_failure( "Attempt to dereference a nullptr!" );
			return nullptr;
		}
		return ast;
	}

	operator Code()
	{
		return { ( AST* )ast };
	}

#pragma region Iterator

	SpecifierT* begin()
	{
		if ( ast )
			return &raw()->ArrSpecs[ 0 ];

		return nullptr;
	}

	SpecifierT* end()
	{
		return raw()->ArrSpecs + raw()->NumEntries;
	}

#pragma endregion Iterator

	AST_Specifiers* ast;
};

struct CodeStruct
{
	Using_Code( CodeStruct );

	void add_interface( CodeType interface );

	AST* raw()
	{
		return rcast( AST*, ast );
	}

	operator Code()
	{
		return *rcast( Code*, this );
	}

	AST_Struct* operator->()
	{
		if ( ast == nullptr )
		{
			log_failure( "Attempt to dereference a nullptr" );
			return nullptr;
		}
		return ast;
	}

	AST_Struct* ast;
};

#define Define_CodeType( Typename )   \
	struct Code##Typename             \
	{                                 \
		Using_Code( Code##Typename ); \
		AST* raw();                   \
		operator Code();              \
		AST_##Typename* operator->(); \
		AST_##Typename* ast;          \
	}

Define_CodeType( Attributes );
Define_CodeType( Comment );
Define_CodeType( Constructor );
Define_CodeType( Define );
Define_CodeType( Destructor );
Define_CodeType( Enum );
Define_CodeType( Exec );
Define_CodeType( Extern );
Define_CodeType( Include );
Define_CodeType( Friend );
Define_CodeType( Fn );
Define_CodeType( Module );
Define_CodeType( NS );
Define_CodeType( Operator );
Define_CodeType( OpCast );
Define_CodeType( Pragma );
Define_CodeType( PreprocessCond );
Define_CodeType( Template );
Define_CodeType( Type );
Define_CodeType( Typedef );
Define_CodeType( Union );
Define_CodeType( Using );
Define_CodeType( Var );

#undef Define_CodeType
#undef Using_Code

#pragma endregion Code Types

#pragma region AST Types

/*
    Show only relevant members of the AST for its type.
    AST* fields are replaced with Code types.
        - Guards assignemnts to AST* fields to ensure the AST is duplicated if assigned to another parent.
*/

struct AST_Body
{
	char           _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];
	Code           Front;
	Code           Back;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	char           _PAD_UNUSED_[ sizeof( ModuleFlag ) ];
	s32            NumEntries;
};

static_assert( sizeof( AST_Body ) == sizeof( AST ), "ERROR: AST_Body is not the same size as AST" );

struct AST_Attributes
{
	union
	{
		char         _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];
		StringCached Content;
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	char           _PAD_UNUSED_[ sizeof( ModuleFlag ) + sizeof( u32 ) ];
};

static_assert( sizeof( AST_Attributes ) == sizeof( AST ), "ERROR: AST_Attributes is not the same size as AST" );

struct AST_Comment
{
	union
	{
		char         _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];
		StringCached Content;
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	char           _PAD_UNUSED_[ sizeof( ModuleFlag ) + sizeof( u32 ) ];
};

static_assert( sizeof( AST_Comment ) == sizeof( AST ), "ERROR: AST_Comment is not the same size as AST" );

struct AST_Class
{
	union
	{
		char _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];

		struct
		{
			CodeComment    InlineCmt;    // Only supported by forward declarations
			CodeAttributes Attributes;
			char           _PAD_SPECS_[ sizeof( AST* ) ];
			CodeType       ParentType;
			char           _PAD_PARAMS_[ sizeof( AST* ) ];
			CodeBody       Body;
			char           _PAD_PROPERTIES_2_[ sizeof( AST* ) ];
		};
	};

	CodeType       Prev;
	CodeType       Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	ModuleFlag     ModuleFlags;
	AccessSpec     ParentAccess;
};

static_assert( sizeof( AST_Class ) == sizeof( AST ), "ERROR: AST_Class is not the same size as AST" );

struct AST_Constructor
{
	union
	{
		char _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];

		struct
		{
			CodeComment    InlineCmt;    // Only supported by forward declarations
			char           _PAD_PROPERTIES_[ sizeof( AST* ) * 1 ];
			CodeSpecifiers Specs;
			Code           InitializerList;
			CodeParam      Params;
			Code           Body;
			char           _PAD_PROPERTIES_2_[ sizeof( AST* ) * 2 ];
		};
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	char           _PAD_NAME_[ sizeof( StringCached ) ];
	CodeT          Type;
	char           _PAD_UNUSED_[ sizeof( ModuleFlag ) + sizeof( u32 ) ];
};

static_assert( sizeof( AST_Constructor ) == sizeof( AST ), "ERROR: AST_Constructor is not the same size as AST" );

struct AST_Define
{
	union
	{
		char         _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];
		StringCached Content;
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	char           _PAD_UNUSED_[ sizeof( ModuleFlag ) + sizeof( u32 ) ];
};

static_assert( sizeof( AST_Define ) == sizeof( AST ), "ERROR: AST_Define is not the same size as AST" );

struct AST_Destructor
{
	union
	{
		char _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];

		struct
		{
			CodeComment    InlineCmt;
			char           _PAD_PROPERTIES_[ sizeof( AST* ) * 1 ];
			CodeSpecifiers Specs;
			char           _PAD_PROPERTIES_2_[ sizeof( AST* ) * 2 ];
			Code           Body;
			char           _PAD_PROPERTIES_3_[ sizeof( AST* ) ];
		};
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	char           _PAD_NAME_[ sizeof( StringCached ) ];
	CodeT          Type;
	char           _PAD_UNUSED_[ sizeof( ModuleFlag ) + sizeof( u32 ) ];
};

static_assert( sizeof( AST_Destructor ) == sizeof( AST ), "ERROR: AST_Destructor is not the same size as AST" );

struct AST_Enum
{
	union
	{
		char _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];

		struct
		{
			CodeComment    InlineCmt;
			CodeAttributes Attributes;
			char           _PAD_SPEC_[ sizeof( AST* ) ];
			CodeType       UnderlyingType;
			char           _PAD_PARAMS_[ sizeof( AST* ) ];
			CodeBody       Body;
			char           _PAD_PROPERTIES_2_[ sizeof( AST* ) ];
		};
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	ModuleFlag     ModuleFlags;
	char           _PAD_UNUSED_[ sizeof( u32 ) ];
};

static_assert( sizeof( AST_Enum ) == sizeof( AST ), "ERROR: AST_Enum is not the same size as AST" );

struct AST_Exec
{
	union
	{
		char         _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];
		StringCached Content;
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	char           _PAD_UNUSED_[ sizeof( ModuleFlag ) + sizeof( u32 ) ];
};

static_assert( sizeof( AST_Exec ) == sizeof( AST ), "ERROR: AST_Exec is not the same size as AST" );

struct AST_Extern
{
	union
	{
		char _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];

		struct
		{
			char     _PAD_PROPERTIES_[ sizeof( AST* ) * 5 ];
			CodeBody Body;
			char     _PAD_PROPERTIES_2_[ sizeof( AST* ) ];
		};
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	char           _PAD_UNUSED_[ sizeof( ModuleFlag ) + sizeof( u32 ) ];
};

static_assert( sizeof( AST_Extern ) == sizeof( AST ), "ERROR: AST_Extern is not the same size as AST" );

struct AST_Include
{
	union
	{
		char         _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];
		StringCached Content;
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	char           _PAD_UNUSED_[ sizeof( ModuleFlag ) + sizeof( u32 ) ];
};

static_assert( sizeof( AST_Include ) == sizeof( AST ), "ERROR: AST_Include is not the same size as AST" );

struct AST_Friend
{
	union
	{
		char _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];

		struct
		{
			CodeComment InlineCmt;
			char        _PAD_PROPERTIES_[ sizeof( AST* ) * 4 ];
			Code        Declaration;
			char        _PAD_PROPERTIES_2_[ sizeof( AST* ) ];
		};
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	char           _PAD_UNUSED_[ sizeof( ModuleFlag ) + sizeof( u32 ) ];
};

static_assert( sizeof( AST_Friend ) == sizeof( AST ), "ERROR: AST_Friend is not the same size as AST" );

struct AST_Fn
{
	union
	{
		char _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];

		struct
		{
			CodeComment    InlineCmt;
			CodeAttributes Attributes;
			CodeSpecifiers Specs;
			CodeType       ReturnType;
			CodeParam      Params;
			CodeBody       Body;
			char           _PAD_PROPERTIES_[ sizeof( AST* ) ];
		};
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	ModuleFlag     ModuleFlags;
	char           _PAD_UNUSED_[ sizeof( u32 ) ];
};

static_assert( sizeof( AST_Fn ) == sizeof( AST ), "ERROR: AST_Fn is not the same size as AST" );

struct AST_Module
{
	char           _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];
	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	ModuleFlag     ModuleFlags;
	char           _PAD_UNUSED_[ sizeof( u32 ) ];
};

static_assert( sizeof( AST_Module ) == sizeof( AST ), "ERROR: AST_Module is not the same size as AST" );

struct AST_NS
{
	union
	{
		char _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];

		struct
		{
			char     _PAD_PROPERTIES_[ sizeof( AST* ) * 5 ];
			CodeBody Body;
			char     _PAD_PROPERTIES_2_[ sizeof( AST* ) ];
		};
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	ModuleFlag     ModuleFlags;
	char           _PAD_UNUSED_[ sizeof( u32 ) ];
};

static_assert( sizeof( AST_NS ) == sizeof( AST ), "ERROR: AST_NS is not the same size as AST" );

struct AST_Operator
{
	union
	{
		char _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];

		struct
		{
			CodeComment    InlineCmt;
			CodeAttributes Attributes;
			CodeSpecifiers Specs;
			CodeType       ReturnType;
			CodeParam      Params;
			CodeBody       Body;
			char           _PAD_PROPERTIES_[ sizeof( AST* ) ];
		};
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	ModuleFlag     ModuleFlags;
	OperatorT      Op;
};

static_assert( sizeof( AST_Operator ) == sizeof( AST ), "ERROR: AST_Operator is not the same size as AST" );

struct AST_OpCast
{
	union
	{
		char _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];

		struct
		{
			CodeComment    InlineCmt;
			char           _PAD_PROPERTIES_[ sizeof( AST* ) ];
			CodeSpecifiers Specs;
			CodeType       ValueType;
			char           _PAD_PROPERTIES_2_[ sizeof( AST* ) ];
			CodeBody       Body;
			char           _PAD_PROPERTIES_3_[ sizeof( AST* ) ];
		};
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	char           _PAD_UNUSED_[ sizeof( ModuleFlag ) + sizeof( u32 ) ];
};

static_assert( sizeof( AST_OpCast ) == sizeof( AST ), "ERROR: AST_OpCast is not the same size as AST" );

struct AST_Param
{
	union
	{
		char _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];

		struct
		{
			char     _PAD_PROPERTIES_2_[ sizeof( AST* ) * 3 ];
			CodeType ValueType;
			char     _PAD_PROPERTIES_[ sizeof( AST* ) ];
			Code     Value;
			char     _PAD_PROPERTIES_3_[ sizeof( AST* ) ];
		};
	};

	CodeParam      Last;
	CodeParam      Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	char           _PAD_UNUSED_[ sizeof( ModuleFlag ) ];
	s32            NumEntries;
};

static_assert( sizeof( AST_Param ) == sizeof( AST ), "ERROR: AST_Param is not the same size as AST" );

struct AST_Pragma
{
	union
	{
		char         _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];
		StringCached Content;
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	char           _PAD_UNUSED_[ sizeof( ModuleFlag ) + sizeof( u32 ) ];
};

static_assert( sizeof( AST_Pragma ) == sizeof( AST ), "ERROR: AST_Pragma is not the same size as AST" );

struct AST_PreprocessCond
{
	union
	{
		char         _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];
		StringCached Content;
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	char           _PAD_UNUSED_[ sizeof( ModuleFlag ) + sizeof( u32 ) ];
};

static_assert( sizeof( AST_PreprocessCond ) == sizeof( AST ), "ERROR: AST_PreprocessCond is not the same size as AST" );

struct AST_Specifiers
{
	SpecifierT     ArrSpecs[ AST::ArrSpecs_Cap ];
	CodeSpecifiers NextSpecs;
	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	char           _PAD_UNUSED_[ sizeof( ModuleFlag ) ];
	s32            NumEntries;
};

static_assert( sizeof( AST_Specifiers ) == sizeof( AST ), "ERROR: AST_Specifier is not the same size as AST" );

struct AST_Struct
{
	union
	{
		char _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];

		struct
		{
			CodeComment    InlineCmt;
			CodeAttributes Attributes;
			char           _PAD_SPECS_[ sizeof( AST* ) ];
			CodeType       ParentType;
			char           _PAD_PARAMS_[ sizeof( AST* ) ];
			CodeBody       Body;
			char           _PAD_PROPERTIES_2_[ sizeof( AST* ) ];
		};
	};

	CodeType       Prev;
	CodeType       Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	ModuleFlag     ModuleFlags;
	AccessSpec     ParentAccess;
};

static_assert( sizeof( AST_Struct ) == sizeof( AST ), "ERROR: AST_Struct is not the same size as AST" );

struct AST_Template
{
	union
	{
		char _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];

		struct
		{
			char      _PAD_PROPERTIES_[ sizeof( AST* ) * 4 ];
			CodeParam Params;
			Code      Declaration;
			char      _PAD_PROPERTIES_2_[ sizeof( AST* ) ];
		};
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	ModuleFlag     ModuleFlags;
	char           _PAD_UNUSED_[ sizeof( u32 ) ];
};

static_assert( sizeof( AST_Template ) == sizeof( AST ), "ERROR: AST_Template is not the same size as AST" );

struct AST_Type
{
	union
	{
		char _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];

		struct
		{
			char           _PAD_INLINE_CMT_[ sizeof( AST* ) ];
			CodeAttributes Attributes;
			CodeSpecifiers Specs;
			CodeType       ReturnType;    // Only used for function signatures
			CodeParam      Params;        // Only used for function signatures
			Code           ArrExpr;
			CodeSpecifiers SpecsFuncSuffix;    // Only used for function signatures
		};
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	char           _PAD_UNUSED_[ sizeof( ModuleFlag ) ];
	b32            IsParamPack;
};

static_assert( sizeof( AST_Type ) == sizeof( AST ), "ERROR: AST_Type is not the same size as AST" );

struct AST_Typedef
{
	union
	{
		char _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];

		struct
		{
			CodeComment InlineCmt;
			char        _PAD_PROPERTIES_[ sizeof( AST* ) * 2 ];
			Code        UnderlyingType;
			char        _PAD_PROPERTIES_2_[ sizeof( AST* ) * 3 ];
		};
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	ModuleFlag     ModuleFlags;
	b32            IsFunction;
};

static_assert( sizeof( AST_Typedef ) == sizeof( AST ), "ERROR: AST_Typedef is not the same size as AST" );

struct AST_Union
{
	union
	{
		char _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];

		struct
		{
			char           _PAD_INLINE_CMT_[ sizeof( AST* ) ];
			CodeAttributes Attributes;
			char           _PAD_PROPERTIES_[ sizeof( AST* ) * 3 ];
			CodeBody       Body;
			char           _PAD_PROPERTIES_2_[ sizeof( AST* ) ];
		};
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	ModuleFlag     ModuleFlags;
	char           _PAD_UNUSED_[ sizeof( u32 ) ];
};

static_assert( sizeof( AST_Union ) == sizeof( AST ), "ERROR: AST_Union is not the same size as AST" );

struct AST_Using
{
	union
	{
		char _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];

		struct
		{
			CodeComment    InlineCmt;
			CodeAttributes Attributes;
			char           _PAD_SPECS_[ sizeof( AST* ) ];
			CodeType       UnderlyingType;
			char           _PAD_PROPERTIES_[ sizeof( AST* ) * 3 ];
		};
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	ModuleFlag     ModuleFlags;
	char           _PAD_UNUSED_[ sizeof( u32 ) ];
};

static_assert( sizeof( AST_Using ) == sizeof( AST ), "ERROR: AST_Using is not the same size as AST" );

struct AST_Var
{
	union
	{
		char _PAD_[ sizeof( SpecifierT ) * AST::ArrSpecs_Cap + sizeof( AST* ) ];

		struct
		{
			CodeComment    InlineCmt;
			CodeAttributes Attributes;
			CodeSpecifiers Specs;
			CodeType       ValueType;
			Code           BitfieldSize;
			Code           Value;
			CodeVar        NextVar;
		};
	};

	Code           Prev;
	Code           Next;
	Parser::Token* Token;
	Code           Parent;
	StringCached   Name;
	CodeT          Type;
	ModuleFlag     ModuleFlags;
	char           _PAD_UNUSED_[ sizeof( u32 ) ];
};

static_assert( sizeof( AST_Var ) == sizeof( AST ), "ERROR: AST_Var is not the same size as AST" );

#pragma endregion AST Types

#pragma endregion AST

#pragma region Gen Interface

// Initialize the library.
// This currently just initializes the CodePool.
void init();

// Currently manually free's the arenas, code for checking for leaks.
// However on Windows at least, it doesn't need to occur as the OS will clean up after the process.
void deinit();

// Clears the allocations, but doesn't return to the heap, the calls init() again.
// Ease of use.
void reset();

// Used internally to retrive or make string allocations.
// Strings are stored in a series of string arenas of fixed size (SizePer_StringArena)
StringCached get_cached_string( StrC str );

/*
    This provides a fresh Code AST.
    The gen interface use this as their method from getting a new AST object from the CodePool.
    Use this if you want to make your own API for formatting the supported Code Types.
*/
Code make_code();

// Set these before calling gen's init() procedure.
// Data

void set_allocator_data_arrays( AllocatorInfo data_array_allocator );
void set_allocator_code_pool( AllocatorInfo pool_allocator );
void set_allocator_lexer( AllocatorInfo lex_allocator );
void set_allocator_string_arena( AllocatorInfo string_allocator );
void set_allocator_string_table( AllocatorInfo string_allocator );
void set_allocator_type_table( AllocatorInfo type_reg_allocator );

#pragma region Upfront

CodeAttributes def_attributes( StrC content );
CodeComment    def_comment( StrC content );

CodeClass def_class(
StrC           name,
Code           body           = NoCode,
CodeType       parent         = NoCode,
AccessSpec     access         = AccessSpec::Default,
CodeAttributes attributes     = NoCode,
ModuleFlag     mflags         = ModuleFlag::None,
CodeType*      interfaces     = nullptr,
s32            num_interfaces = 0
);

CodeConstructor def_constructor( CodeParam params = NoCode, Code initializer_list = NoCode, Code body = NoCode );

CodeDefine def_define( StrC name, StrC content );

CodeDestructor def_destructor( Code body = NoCode, CodeSpecifiers specifiers = NoCode );

CodeEnum def_enum(
StrC           name,
Code           body       = NoCode,
CodeType       type       = NoCode,
EnumT          specifier  = EnumRegular,
CodeAttributes attributes = NoCode,
ModuleFlag     mflags     = ModuleFlag::None
);

CodeExec   def_execution( StrC content );
CodeExtern def_extern_link( StrC name, Code body );
CodeFriend def_friend( Code symbol );

CodeFn def_function(
StrC           name,
CodeParam      params     = NoCode,
CodeType       ret_type   = NoCode,
Code           body       = NoCode,
CodeSpecifiers specifiers = NoCode,
CodeAttributes attributes = NoCode,
ModuleFlag     mflags     = ModuleFlag::None
);

CodeInclude def_include( StrC content, bool foreign = false );
CodeModule  def_module( StrC name, ModuleFlag mflags = ModuleFlag::None );
CodeNS      def_namespace( StrC name, Code body, ModuleFlag mflags = ModuleFlag::None );

CodeOperator def_operator(
OperatorT      op,
StrC           nspace,
CodeParam      params     = NoCode,
CodeType       ret_type   = NoCode,
Code           body       = NoCode,
CodeSpecifiers specifiers = NoCode,
CodeAttributes attributes = NoCode,
ModuleFlag     mflags     = ModuleFlag::None
);

CodeOpCast def_operator_cast( CodeType type, Code body = NoCode, CodeSpecifiers specs = NoCode );

CodeParam  def_param( CodeType type, StrC name, Code value = NoCode );
CodePragma def_pragma( StrC directive );

CodePreprocessCond def_preprocess_cond( EPreprocessCond type, StrC content );

CodeSpecifiers def_specifier( SpecifierT specifier );

CodeStruct def_struct(
StrC           name,
Code           body           = NoCode,
CodeType       parent         = NoCode,
AccessSpec     access         = AccessSpec::Default,
CodeAttributes attributes     = NoCode,
ModuleFlag     mflags         = ModuleFlag::None,
CodeType*      interfaces     = nullptr,
s32            num_interfaces = 0
);

CodeTemplate def_template( CodeParam params, Code definition, ModuleFlag mflags = ModuleFlag::None );

CodeType    def_type( StrC name, Code arrayexpr = NoCode, CodeSpecifiers specifiers = NoCode, CodeAttributes attributes = NoCode );
CodeTypedef def_typedef( StrC name, Code type, CodeAttributes attributes = NoCode, ModuleFlag mflags = ModuleFlag::None );

CodeUnion def_union( StrC name, Code body, CodeAttributes attributes = NoCode, ModuleFlag mflags = ModuleFlag::None );

CodeUsing def_using( StrC name, CodeType type = NoCode, CodeAttributes attributess = NoCode, ModuleFlag mflags = ModuleFlag::None );

CodeUsing def_using_namespace( StrC name );

CodeVar def_variable(
CodeType       type,
StrC           name,
Code           value      = NoCode,
CodeSpecifiers specifiers = NoCode,
CodeAttributes attributes = NoCode,
ModuleFlag     mflags     = ModuleFlag::None
);

// Constructs an empty body. Use AST::validate_body() to check if the body is was has valid entries.
CodeBody def_body( CodeT type );

// There are two options for defining a struct body, either varadically provided with the args macro to auto-deduce the arg num,
/// or provide as an array of Code objects.

CodeBody       def_class_body( s32 num, ... );
CodeBody       def_class_body( s32 num, Code* codes );
CodeBody       def_enum_body( s32 num, ... );
CodeBody       def_enum_body( s32 num, Code* codes );
CodeBody       def_export_body( s32 num, ... );
CodeBody       def_export_body( s32 num, Code* codes );
CodeBody       def_extern_link_body( s32 num, ... );
CodeBody       def_extern_link_body( s32 num, Code* codes );
CodeBody       def_function_body( s32 num, ... );
CodeBody       def_function_body( s32 num, Code* codes );
CodeBody       def_global_body( s32 num, ... );
CodeBody       def_global_body( s32 num, Code* codes );
CodeBody       def_namespace_body( s32 num, ... );
CodeBody       def_namespace_body( s32 num, Code* codes );
CodeParam      def_params( s32 num, ... );
CodeParam      def_params( s32 num, CodeParam* params );
CodeSpecifiers def_specifiers( s32 num, ... );
CodeSpecifiers def_specifiers( s32 num, SpecifierT* specs );
CodeBody       def_struct_body( s32 num, ... );
CodeBody       def_struct_body( s32 num, Code* codes );
CodeBody       def_union_body( s32 num, ... );
CodeBody       def_union_body( s32 num, Code* codes );

#pragma endregion Upfront

#pragma region Parsing

CodeClass       parse_class( StrC class_def );
CodeConstructor parse_constructor( StrC constructor_def );
CodeDestructor  parse_destructor( StrC destructor_def );
CodeEnum        parse_enum( StrC enum_def );
CodeBody        parse_export_body( StrC export_def );
CodeExtern      parse_extern_link( StrC exten_link_def );
CodeFriend      parse_friend( StrC friend_def );
CodeFn          parse_function( StrC fn_def );
CodeBody        parse_global_body( StrC body_def );
CodeNS          parse_namespace( StrC namespace_def );
CodeOperator    parse_operator( StrC operator_def );
CodeOpCast      parse_operator_cast( StrC operator_def );
CodeStruct      parse_struct( StrC struct_def );
CodeTemplate    parse_template( StrC template_def );
CodeType        parse_type( StrC type_def );
CodeTypedef     parse_typedef( StrC typedef_def );
CodeUnion       parse_union( StrC union_def );
CodeUsing       parse_using( StrC using_def );
CodeVar         parse_variable( StrC var_def );

#pragma endregion Parsing

#pragma region Untyped text

sw token_fmt_va( char* buf, uw buf_size, s32 num_tokens, va_list va );
//! Do not use directly. Use the token_fmt macro instead.
StrC token_fmt_impl( sw, ... );

Code untyped_str( StrC content );
Code untyped_fmt( char const* fmt, ... );
Code untyped_token_fmt( char const* fmt, s32 num_tokens, ... );

#pragma endregion Untyped text

#pragma endregion Gen Interface

#pragma region Inlines

void AST::append( AST* other )
{
	if ( other->Parent )
		other = other->duplicate();

	other->Parent = this;

	if ( Front == nullptr )
	{
		Front = other;
		Back  = other;

		NumEntries++;
		return;
	}

	AST* Current  = Back;
	Current->Next = other;
	other->Prev   = Current;
	Back          = other;
	NumEntries++;
}

Code& AST::entry( u32 idx )
{
	AST** current = &Front;
	while ( idx >= 0 && current != nullptr )
	{
		if ( idx == 0 )
			return *rcast( Code*, current );

		current = &( *current )->Next;
		idx--;
	}

	return *rcast( Code*, current );
}

bool AST::has_entries()
{
	return NumEntries;
}

char const* AST::type_str()
{
	return ECode::to_str( Type );
}

AST::operator Code()
{
	return { this };
}

Code& Code::operator++()
{
	if ( ast )
		ast = ast->Next;

	return *this;
}

void CodeClass::add_interface( CodeType type )
{
	CodeType possible_slot = ast->ParentType;
	if ( possible_slot.ast )
	{
		// Were adding an interface to parent type, so we need to make sure the parent type is public.
		ast->ParentAccess = AccessSpec::Public;
		// If your planning on adding a proper parent,
		// then you'll need to move this over to ParentType->next and update ParentAccess accordingly.
	}

	while ( possible_slot.ast != nullptr )
	{
		possible_slot.ast = ( AST_Type* )possible_slot->Next.ast;
	}

	possible_slot.ast = type.ast;
}

void CodeParam::append( CodeParam other )
{
	AST* self  = ( AST* )ast;
	AST* entry = ( AST* )other.ast;

	if ( entry->Parent )
		entry = entry->duplicate();

	entry->Parent = self;

	if ( self->Last == nullptr )
	{
		self->Last = entry;
		self->Next = entry;
		self->NumEntries++;
		return;
	}

	self->Last->Next = entry;
	self->Last       = entry;
	self->NumEntries++;
}

CodeParam CodeParam::get( s32 idx )
{
	CodeParam param = *this;
	do
	{
		if ( ! ++param )
			return { nullptr };

		return { ( AST_Param* )param.raw()->Next };
	} while ( --idx );

	return { nullptr };
}

bool CodeParam::has_entries()
{
	return ast->NumEntries > 0;
}

CodeParam& CodeParam::operator++()
{
	ast = ast->Next.ast;
	return *this;
}

void CodeStruct::add_interface( CodeType type )
{
	CodeType possible_slot = ast->ParentType;
	if ( possible_slot.ast )
	{
		// Were adding an interface to parent type, so we need to make sure the parent type is public.
		ast->ParentAccess = AccessSpec::Public;
		// If your planning on adding a proper parent,
		// then you'll need to move this over to ParentType->next and update ParentAccess accordingly.
	}

	while ( possible_slot.ast != nullptr )
	{
		possible_slot.ast = ( AST_Type* )possible_slot->Next.ast;
	}

	possible_slot.ast = type.ast;
}

CodeBody def_body( CodeT type )
{
	switch ( type )
	{
		using namespace ECode;
		case Class_Body :
		case Enum_Body :
		case Export_Body :
		case Extern_Linkage :
		case Function_Body :
		case Global_Body :
		case Namespace_Body :
		case Struct_Body :
		case Union_Body :
			break;

		default :
			log_failure( "def_body: Invalid type %s", ( char const* )ECode::to_str( type ) );
			return ( CodeBody )Code::Invalid;
	}

	Code result  = make_code();
	result->Type = type;
	return ( CodeBody )result;
}

StrC token_fmt_impl( sw num, ... )
{
	local_persist thread_local char buf[ GEN_PRINTF_MAXLEN ] = { 0 };
	mem_set( buf, 0, GEN_PRINTF_MAXLEN );

	va_list va;
	va_start( va, num );
	sw result = token_fmt_va( buf, GEN_PRINTF_MAXLEN, num, va );
	va_end( va );

	return { result, buf };
}

#pragma region generated code inline implementation

char const* Code::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code Code::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool Code::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool Code::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void Code::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String Code::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

Code& Code::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool Code::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool Code::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

Code::operator bool()
{
	return ast != nullptr;
}

char const* CodeBody::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeBody::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeBody::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeBody::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeBody::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeBody::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeBody& CodeBody::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeBody::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeBody::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeBody::operator bool()
{
	return ast != nullptr;
}

char const* CodeAttributes::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeAttributes::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeAttributes::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeAttributes::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeAttributes::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeAttributes::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeAttributes& CodeAttributes::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeAttributes::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeAttributes::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeAttributes::operator bool()
{
	return ast != nullptr;
}

AST* CodeAttributes::raw()
{
	return rcast( AST*, ast );
}

CodeAttributes::operator Code()
{
	return *rcast( Code*, this );
}

AST_Attributes* CodeAttributes::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeComment::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeComment::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeComment::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeComment::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeComment::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeComment::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeComment& CodeComment::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeComment::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeComment::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeComment::operator bool()
{
	return ast != nullptr;
}

AST* CodeComment::raw()
{
	return rcast( AST*, ast );
}

CodeComment::operator Code()
{
	return *rcast( Code*, this );
}

AST_Comment* CodeComment::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeConstructor::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeConstructor::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeConstructor::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeConstructor::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeConstructor::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeConstructor::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeConstructor& CodeConstructor::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeConstructor::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeConstructor::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeConstructor::operator bool()
{
	return ast != nullptr;
}

AST* CodeConstructor::raw()
{
	return rcast( AST*, ast );
}

CodeConstructor::operator Code()
{
	return *rcast( Code*, this );
}

AST_Constructor* CodeConstructor::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeClass::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeClass::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeClass::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeClass::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeClass::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeClass::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeClass& CodeClass::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeClass::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeClass::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeClass::operator bool()
{
	return ast != nullptr;
}

char const* CodeDefine::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeDefine::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeDefine::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeDefine::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeDefine::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeDefine::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeDefine& CodeDefine::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeDefine::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeDefine::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeDefine::operator bool()
{
	return ast != nullptr;
}

AST* CodeDefine::raw()
{
	return rcast( AST*, ast );
}

CodeDefine::operator Code()
{
	return *rcast( Code*, this );
}

AST_Define* CodeDefine::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeDestructor::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeDestructor::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeDestructor::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeDestructor::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeDestructor::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeDestructor::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeDestructor& CodeDestructor::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeDestructor::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeDestructor::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeDestructor::operator bool()
{
	return ast != nullptr;
}

AST* CodeDestructor::raw()
{
	return rcast( AST*, ast );
}

CodeDestructor::operator Code()
{
	return *rcast( Code*, this );
}

AST_Destructor* CodeDestructor::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeEnum::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeEnum::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeEnum::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeEnum::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeEnum::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeEnum::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeEnum& CodeEnum::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeEnum::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeEnum::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeEnum::operator bool()
{
	return ast != nullptr;
}

AST* CodeEnum::raw()
{
	return rcast( AST*, ast );
}

CodeEnum::operator Code()
{
	return *rcast( Code*, this );
}

AST_Enum* CodeEnum::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeExec::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeExec::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeExec::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeExec::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeExec::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeExec::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeExec& CodeExec::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeExec::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeExec::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeExec::operator bool()
{
	return ast != nullptr;
}

AST* CodeExec::raw()
{
	return rcast( AST*, ast );
}

CodeExec::operator Code()
{
	return *rcast( Code*, this );
}

AST_Exec* CodeExec::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeExtern::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeExtern::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeExtern::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeExtern::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeExtern::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeExtern::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeExtern& CodeExtern::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeExtern::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeExtern::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeExtern::operator bool()
{
	return ast != nullptr;
}

AST* CodeExtern::raw()
{
	return rcast( AST*, ast );
}

CodeExtern::operator Code()
{
	return *rcast( Code*, this );
}

AST_Extern* CodeExtern::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeFriend::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeFriend::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeFriend::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeFriend::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeFriend::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeFriend::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeFriend& CodeFriend::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeFriend::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeFriend::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeFriend::operator bool()
{
	return ast != nullptr;
}

AST* CodeFriend::raw()
{
	return rcast( AST*, ast );
}

CodeFriend::operator Code()
{
	return *rcast( Code*, this );
}

AST_Friend* CodeFriend::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeFn::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeFn::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeFn::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeFn::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeFn::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeFn::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeFn& CodeFn::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeFn::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeFn::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeFn::operator bool()
{
	return ast != nullptr;
}

AST* CodeFn::raw()
{
	return rcast( AST*, ast );
}

CodeFn::operator Code()
{
	return *rcast( Code*, this );
}

AST_Fn* CodeFn::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeInclude::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeInclude::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeInclude::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeInclude::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeInclude::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeInclude::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeInclude& CodeInclude::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeInclude::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeInclude::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeInclude::operator bool()
{
	return ast != nullptr;
}

AST* CodeInclude::raw()
{
	return rcast( AST*, ast );
}

CodeInclude::operator Code()
{
	return *rcast( Code*, this );
}

AST_Include* CodeInclude::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeModule::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeModule::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeModule::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeModule::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeModule::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeModule::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeModule& CodeModule::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeModule::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeModule::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeModule::operator bool()
{
	return ast != nullptr;
}

AST* CodeModule::raw()
{
	return rcast( AST*, ast );
}

CodeModule::operator Code()
{
	return *rcast( Code*, this );
}

AST_Module* CodeModule::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeNS::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeNS::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeNS::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeNS::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeNS::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeNS::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeNS& CodeNS::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeNS::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeNS::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeNS::operator bool()
{
	return ast != nullptr;
}

AST* CodeNS::raw()
{
	return rcast( AST*, ast );
}

CodeNS::operator Code()
{
	return *rcast( Code*, this );
}

AST_NS* CodeNS::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeOperator::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeOperator::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeOperator::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeOperator::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeOperator::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeOperator::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeOperator& CodeOperator::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeOperator::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeOperator::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeOperator::operator bool()
{
	return ast != nullptr;
}

AST* CodeOperator::raw()
{
	return rcast( AST*, ast );
}

CodeOperator::operator Code()
{
	return *rcast( Code*, this );
}

AST_Operator* CodeOperator::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeOpCast::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeOpCast::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeOpCast::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeOpCast::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeOpCast::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeOpCast::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeOpCast& CodeOpCast::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeOpCast::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeOpCast::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeOpCast::operator bool()
{
	return ast != nullptr;
}

AST* CodeOpCast::raw()
{
	return rcast( AST*, ast );
}

CodeOpCast::operator Code()
{
	return *rcast( Code*, this );
}

AST_OpCast* CodeOpCast::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeParam::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeParam::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeParam::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeParam::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeParam::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeParam::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeParam& CodeParam::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeParam::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeParam::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeParam::operator bool()
{
	return ast != nullptr;
}

char const* CodePragma::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodePragma::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodePragma::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodePragma::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodePragma::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodePragma::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodePragma& CodePragma::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodePragma::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodePragma::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodePragma::operator bool()
{
	return ast != nullptr;
}

AST* CodePragma::raw()
{
	return rcast( AST*, ast );
}

CodePragma::operator Code()
{
	return *rcast( Code*, this );
}

AST_Pragma* CodePragma::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodePreprocessCond::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodePreprocessCond::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodePreprocessCond::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodePreprocessCond::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodePreprocessCond::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodePreprocessCond::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodePreprocessCond& CodePreprocessCond::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodePreprocessCond::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodePreprocessCond::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodePreprocessCond::operator bool()
{
	return ast != nullptr;
}

AST* CodePreprocessCond::raw()
{
	return rcast( AST*, ast );
}

CodePreprocessCond::operator Code()
{
	return *rcast( Code*, this );
}

AST_PreprocessCond* CodePreprocessCond::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeSpecifiers::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeSpecifiers::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeSpecifiers::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeSpecifiers::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeSpecifiers::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeSpecifiers::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeSpecifiers& CodeSpecifiers::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeSpecifiers::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeSpecifiers::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeSpecifiers::operator bool()
{
	return ast != nullptr;
}

char const* CodeStruct::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeStruct::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeStruct::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeStruct::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeStruct::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeStruct::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeStruct& CodeStruct::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeStruct::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeStruct::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeStruct::operator bool()
{
	return ast != nullptr;
}

char const* CodeTemplate::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeTemplate::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeTemplate::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeTemplate::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeTemplate::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeTemplate::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeTemplate& CodeTemplate::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeTemplate::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeTemplate::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeTemplate::operator bool()
{
	return ast != nullptr;
}

AST* CodeTemplate::raw()
{
	return rcast( AST*, ast );
}

CodeTemplate::operator Code()
{
	return *rcast( Code*, this );
}

AST_Template* CodeTemplate::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeType::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeType::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeType::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeType::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeType::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeType::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeType& CodeType::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeType::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeType::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeType::operator bool()
{
	return ast != nullptr;
}

AST* CodeType::raw()
{
	return rcast( AST*, ast );
}

CodeType::operator Code()
{
	return *rcast( Code*, this );
}

AST_Type* CodeType::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeTypedef::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeTypedef::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeTypedef::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeTypedef::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeTypedef::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeTypedef::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeTypedef& CodeTypedef::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeTypedef::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeTypedef::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeTypedef::operator bool()
{
	return ast != nullptr;
}

AST* CodeTypedef::raw()
{
	return rcast( AST*, ast );
}

CodeTypedef::operator Code()
{
	return *rcast( Code*, this );
}

AST_Typedef* CodeTypedef::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeUnion::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeUnion::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeUnion::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeUnion::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeUnion::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeUnion::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeUnion& CodeUnion::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeUnion::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeUnion::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeUnion::operator bool()
{
	return ast != nullptr;
}

AST* CodeUnion::raw()
{
	return rcast( AST*, ast );
}

CodeUnion::operator Code()
{
	return *rcast( Code*, this );
}

AST_Union* CodeUnion::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeUsing::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeUsing::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeUsing::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeUsing::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeUsing::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeUsing::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeUsing& CodeUsing::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeUsing::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeUsing::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeUsing::operator bool()
{
	return ast != nullptr;
}

AST* CodeUsing::raw()
{
	return rcast( AST*, ast );
}

CodeUsing::operator Code()
{
	return *rcast( Code*, this );
}

AST_Using* CodeUsing::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

char const* CodeVar::debug_str()
{
	if ( ast == nullptr )
		return "Code::debug_str: AST is null!";
	return rcast( AST*, ast )->debug_str();
}

Code CodeVar::duplicate()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::duplicate: Cannot duplicate code, AST is null!" );
		return Code::Invalid;
	}
	return { rcast( AST*, ast )->duplicate() };
}

bool CodeVar::is_equal( Code other )
{
	if ( ast == nullptr || other.ast == nullptr )
	{
		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );
		return false;
	}
	return rcast( AST*, ast )->is_equal( other.ast );
}

bool CodeVar::is_valid()
{
	return ( AST* )ast != nullptr && rcast( AST*, ast )->Type != CodeT::Invalid;
}

void CodeVar::set_global()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::set_global: Cannot set code as global, AST is null!" );
		return;
	}
	rcast( AST*, ast )->Parent = Code::Global.ast;
}

String CodeVar::to_string()
{
	if ( ast == nullptr )
	{
		log_failure( "Code::to_string: Cannot convert code to string, AST is null!" );
		return { nullptr };
	}
	return rcast( AST*, ast )->to_string();
}

CodeVar& CodeVar::operator=( Code other )
{
	if ( other.ast && other->Parent )
	{
		ast                        = rcast( decltype( ast ), other.ast->duplicate() );
		rcast( AST*, ast )->Parent = nullptr;
	}
	ast = rcast( decltype( ast ), other.ast );
	return *this;
}

bool CodeVar::operator==( Code other )
{
	return ( AST* )ast == other.ast;
}

bool CodeVar::operator!=( Code other )
{
	return ( AST* )ast != other.ast;
}

CodeVar::operator bool()
{
	return ast != nullptr;
}

AST* CodeVar::raw()
{
	return rcast( AST*, ast );
}

CodeVar::operator Code()
{
	return *rcast( Code*, this );
}

AST_Var* CodeVar::operator->()
{
	if ( ast == nullptr )
	{
		log_failure( "Attempt to dereference a nullptr!" );
		return nullptr;
	}
	return ast;
}

#pragma endregion generated code inline implementation

#pragma region generated AST/Code cast implementation

AST::operator CodeBody()
{
	return { rcast( AST_Body*, this ) };
}

Code::operator CodeBody() const
{
	return { ( AST_Body* )ast };
}

AST::operator CodeAttributes()
{
	return { rcast( AST_Attributes*, this ) };
}

Code::operator CodeAttributes() const
{
	return { ( AST_Attributes* )ast };
}

AST::operator CodeComment()
{
	return { rcast( AST_Comment*, this ) };
}

Code::operator CodeComment() const
{
	return { ( AST_Comment* )ast };
}

AST::operator CodeConstructor()
{
	return { rcast( AST_Constructor*, this ) };
}

Code::operator CodeConstructor() const
{
	return { ( AST_Constructor* )ast };
}

AST::operator CodeClass()
{
	return { rcast( AST_Class*, this ) };
}

Code::operator CodeClass() const
{
	return { ( AST_Class* )ast };
}

AST::operator CodeDefine()
{
	return { rcast( AST_Define*, this ) };
}

Code::operator CodeDefine() const
{
	return { ( AST_Define* )ast };
}

AST::operator CodeDestructor()
{
	return { rcast( AST_Destructor*, this ) };
}

Code::operator CodeDestructor() const
{
	return { ( AST_Destructor* )ast };
}

AST::operator CodeEnum()
{
	return { rcast( AST_Enum*, this ) };
}

Code::operator CodeEnum() const
{
	return { ( AST_Enum* )ast };
}

AST::operator CodeExec()
{
	return { rcast( AST_Exec*, this ) };
}

Code::operator CodeExec() const
{
	return { ( AST_Exec* )ast };
}

AST::operator CodeExtern()
{
	return { rcast( AST_Extern*, this ) };
}

Code::operator CodeExtern() const
{
	return { ( AST_Extern* )ast };
}

AST::operator CodeFriend()
{
	return { rcast( AST_Friend*, this ) };
}

Code::operator CodeFriend() const
{
	return { ( AST_Friend* )ast };
}

AST::operator CodeFn()
{
	return { rcast( AST_Fn*, this ) };
}

Code::operator CodeFn() const
{
	return { ( AST_Fn* )ast };
}

AST::operator CodeInclude()
{
	return { rcast( AST_Include*, this ) };
}

Code::operator CodeInclude() const
{
	return { ( AST_Include* )ast };
}

AST::operator CodeModule()
{
	return { rcast( AST_Module*, this ) };
}

Code::operator CodeModule() const
{
	return { ( AST_Module* )ast };
}

AST::operator CodeNS()
{
	return { rcast( AST_NS*, this ) };
}

Code::operator CodeNS() const
{
	return { ( AST_NS* )ast };
}

AST::operator CodeOperator()
{
	return { rcast( AST_Operator*, this ) };
}

Code::operator CodeOperator() const
{
	return { ( AST_Operator* )ast };
}

AST::operator CodeOpCast()
{
	return { rcast( AST_OpCast*, this ) };
}

Code::operator CodeOpCast() const
{
	return { ( AST_OpCast* )ast };
}

AST::operator CodeParam()
{
	return { rcast( AST_Param*, this ) };
}

Code::operator CodeParam() const
{
	return { ( AST_Param* )ast };
}

AST::operator CodePragma()
{
	return { rcast( AST_Pragma*, this ) };
}

Code::operator CodePragma() const
{
	return { ( AST_Pragma* )ast };
}

AST::operator CodePreprocessCond()
{
	return { rcast( AST_PreprocessCond*, this ) };
}

Code::operator CodePreprocessCond() const
{
	return { ( AST_PreprocessCond* )ast };
}

AST::operator CodeSpecifiers()
{
	return { rcast( AST_Specifiers*, this ) };
}

Code::operator CodeSpecifiers() const
{
	return { ( AST_Specifiers* )ast };
}

AST::operator CodeStruct()
{
	return { rcast( AST_Struct*, this ) };
}

Code::operator CodeStruct() const
{
	return { ( AST_Struct* )ast };
}

AST::operator CodeTemplate()
{
	return { rcast( AST_Template*, this ) };
}

Code::operator CodeTemplate() const
{
	return { ( AST_Template* )ast };
}

AST::operator CodeType()
{
	return { rcast( AST_Type*, this ) };
}

Code::operator CodeType() const
{
	return { ( AST_Type* )ast };
}

AST::operator CodeTypedef()
{
	return { rcast( AST_Typedef*, this ) };
}

Code::operator CodeTypedef() const
{
	return { ( AST_Typedef* )ast };
}

AST::operator CodeUnion()
{
	return { rcast( AST_Union*, this ) };
}

Code::operator CodeUnion() const
{
	return { ( AST_Union* )ast };
}

AST::operator CodeUsing()
{
	return { rcast( AST_Using*, this ) };
}

Code::operator CodeUsing() const
{
	return { ( AST_Using* )ast };
}

AST::operator CodeVar()
{
	return { rcast( AST_Var*, this ) };
}

Code::operator CodeVar() const
{
	return { ( AST_Var* )ast };
}

#pragma endregion generated AST / Code cast implementation

#pragma endregion Inlines

#pragma region Constants

#ifndef GEN_GLOBAL_BUCKET_SIZE
#define GEN_GLOBAL_BUCKET_SIZE megabytes( 4 )
#endif
#ifndef GEN_CODEPOOL_NUM_BLOCKS
#define GEN_CODEPOOL_NUM_BLOCKS kilobytes( 16 )
#endif
#ifndef GEN_SIZE_PER_STRING_ARENA
#define GEN_SIZE_PER_STRING_ARENA megabytes( 1 )
#endif
#ifndef GEN_MAX_COMMENT_LINE_LENGTH
#define GEN_MAX_COMMENT_LINE_LENGTH 1024
#endif
#ifndef GEN_MAX_NAME_LENGTH
#define GEN_MAX_NAME_LENGTH 128
#endif
#ifndef GEN_MAX_UNTYPED_STR_LENGTH
#define GEN_MAX_UNTYPED_STR_LENGTH megabytes( 1 )
#endif
#ifndef GEN_TOKEN_FMT_TOKEN_MAP_MEM_SIZE
#define GEN_TOKEN_FMT_TOKEN_MAP_MEM_SIZE kilobytes( 4 )
#endif
#ifndef GEN_LEX_ALLOCATOR_SIZE
#define GEN_LEX_ALLOCATOR_SIZE megabytes( 4 )
#endif
#ifndef GEN_BUILDER_STR_BUFFER_RESERVE
#define GEN_BUILDER_STR_BUFFER_RESERVE megabytes( 1 )
#endif

// These constexprs are used for allocation behavior of data structures
// or string handling while constructing or serializing.
// Change them to suit your needs.

constexpr s32 InitSize_DataArrays = 16;

// NOTE: This limits the maximum size of an allocation
// If you are generating a string larger than this, increase the size of the bucket here.
constexpr uw  Global_BucketSize         = GEN_GLOBAL_BUCKET_SIZE;
constexpr s32 CodePool_NumBlocks        = GEN_CODEPOOL_NUM_BLOCKS;
constexpr s32 SizePer_StringArena       = GEN_SIZE_PER_STRING_ARENA;

constexpr s32 MaxCommentLineLength      = GEN_MAX_COMMENT_LINE_LENGTH;
constexpr s32 MaxNameLength             = GEN_MAX_NAME_LENGTH;
constexpr s32 MaxUntypedStrLength       = GEN_MAX_UNTYPED_STR_LENGTH;
constexpr s32 TokenFmt_TokenMap_MemSize = GEN_TOKEN_FMT_TOKEN_MAP_MEM_SIZE;
constexpr s32 LexAllocator_Size         = GEN_LEX_ALLOCATOR_SIZE;
constexpr s32 Builder_StrBufferReserve  = GEN_BUILDER_STR_BUFFER_RESERVE;

extern Code access_public;
extern Code access_protected;
extern Code access_private;

extern CodeAttributes attrib_api_export;
extern CodeAttributes attrib_api_import;

extern Code module_global_fragment;
extern Code module_private_fragment;

// Exposed, but this is really used for parsing.
extern Code fmt_newline;

extern CodePragma pragma_once;

extern CodeParam param_varadic;

extern CodePreprocessCond preprocess_else;
extern CodePreprocessCond preprocess_endif;

extern CodeSpecifiers spec_const;
extern CodeSpecifiers spec_consteval;
extern CodeSpecifiers spec_constexpr;
extern CodeSpecifiers spec_constinit;
extern CodeSpecifiers spec_extern_linkage;
extern CodeSpecifiers spec_final;
extern CodeSpecifiers spec_forceinline;
extern CodeSpecifiers spec_global;
extern CodeSpecifiers spec_inline;
extern CodeSpecifiers spec_internal_linkage;
extern CodeSpecifiers spec_local_persist;
extern CodeSpecifiers spec_mutable;
extern CodeSpecifiers spec_neverinline;
extern CodeSpecifiers spec_noexcept;
extern CodeSpecifiers spec_override;
extern CodeSpecifiers spec_ptr;
extern CodeSpecifiers spec_pure;
extern CodeSpecifiers spec_ref;
extern CodeSpecifiers spec_register;
extern CodeSpecifiers spec_rvalue;
extern CodeSpecifiers spec_static_member;
extern CodeSpecifiers spec_thread_local;
extern CodeSpecifiers spec_virtual;
extern CodeSpecifiers spec_volatile;

extern CodeType t_empty;    // Used with varaidc parameters. (Exposing just in case its useful for another circumstance)
extern CodeType t_auto;
extern CodeType t_void;
extern CodeType t_int;
extern CodeType t_bool;
extern CodeType t_char;
extern CodeType t_wchar_t;
extern CodeType t_class;
extern CodeType t_typename;

#ifdef GEN_DEFINE_LIBRARY_CODE_CONSTANTS
// Predefined typename codes. Are set to readonly and are setup during gen::init()

extern CodeType t_b32;

extern CodeType t_s8;
extern CodeType t_s16;
extern CodeType t_s32;
extern CodeType t_s64;

extern CodeType t_u8;
extern CodeType t_u16;
extern CodeType t_u32;
extern CodeType t_u64;

extern CodeType t_sw;
extern CodeType t_uw;

extern CodeType t_f32;
extern CodeType t_f64;
#endif

#pragma endregion Constants

#pragma region Macros

#define gen_main main

#define __       NoCode

//	Convienence for defining any name used with the gen api.
//  Lets you provide the length and string literal to the functions without the need for the DSL.
#define name( Id_ )                                      \
	{                                                    \
		sizeof( stringize( Id_ ) ) - 1, stringize( Id_ ) \
	}

//  Same as name just used to indicate intention of literal for code instead of names.
#define code( ... )                                                      \
	{                                                                    \
		sizeof( stringize( __VA_ARGS__ ) ) - 1, stringize( __VA_ARGS__ ) \
	}

#define args( ... )     num_args( __VA_ARGS__ ), __VA_ARGS__

#define code_str( ... ) GEN_NS untyped_str( code( __VA_ARGS__ ) )
#define code_fmt( ... ) GEN_NS untyped_str( token_fmt( __VA_ARGS__ ) )

// Takes a format string (char const*) and a list of tokens (StrC) and returns a StrC of the formatted string.
#define token_fmt( ... ) GEN_NS token_fmt_impl( ( num_args( __VA_ARGS__ ) + 1 ) / 2, __VA_ARGS__ )

#pragma endregion Macros

#ifdef GEN_EXPOSE_BACKEND

// Global allocator used for data with process lifetime.
extern AllocatorInfo  GlobalAllocator;
extern Array< Arena > Global_AllocatorBuckets;

extern Array< Pool >  CodePools;
extern Array< Arena > StringArenas;

extern StringTable StringCache;

extern Arena LexArena;

extern AllocatorInfo Allocator_DataArrays;
extern AllocatorInfo Allocator_CodePool;
extern AllocatorInfo Allocator_Lexer;
extern AllocatorInfo Allocator_StringArena;
extern AllocatorInfo Allocator_StringTable;
extern AllocatorInfo Allocator_TypeTable;

#endif

#pragma region Builder

struct Builder
{
	FileInfo File;
	String   Buffer;

	static Builder open( char const* path );

	void pad_lines( s32 num );

	void print( Code );
	void print_fmt( char const* fmt, ... );

	void write();
};

#pragma endregion Builder
GEN_NS_END

#pragma region GENCPP IMPLEMENTATION GUARD
#if defined( GEN_IMPLEMENTATION ) && ! defined( GEN_IMPLEMENTED )
#define GEN_IMPLEMENTED


//! If its desired to roll your own dependencies, define GEN_ROLL_OWN_DEPENDENCIES before including this file.
// Dependencies are derived from the c-zpl library: https://github.com/zpl-c/zpl
#ifndef GEN_ROLL_OWN_DEPENDENCIES

GEN_NS_BEGIN


#pragma region Macros and Includes

#include <stdio.h>
// NOTE: Ensure we use standard methods for these calls if we use GEN_PICO
#if ! defined( GEN_PICO_CUSTOM_ROUTINES )
#if ! defined( GEN_MODULE_CORE )
#define _strlen                   strlen
#define _printf_err( fmt, ... )   fprintf( stderr, fmt, __VA_ARGS__ )
#define _printf_err_va( fmt, va ) vfprintf( stderr, fmt, va )
#else
#define _strlen                   str_len
#define _printf_err( fmt, ... )   str_fmt_out_err( fmt, __VA_ARGS__ )
#define _printf_err_va( fmt, va ) str_fmt_out_err_va( fmt, va )
#endif
#endif
#
#include <errno.h>
#
#if defined( GEN_SYSTEM_UNIX ) || defined( GEN_SYSTEM_MACOS )
#include <unistd.h>
#elif defined( GEN_SYSTEM_WINDOWS )
#if ! defined( GEN_NO_WINDOWS_H )
#ifndef WIN32_LEAN_AND_MEAN
#ifndef NOMINMAX
#define NOMINMAX
#endif
#
#define WIN32_LEAN_AND_MEAN
#define WIN32_MEAN_AND_LEAN
#define VC_EXTRALEAN
#endif
#include <windows.h>
#undef NOMINMAX
#undef WIN32_LEAN_AND_MEAN
#undef WIN32_MEAN_AND_LEAN
#undef VC_EXTRALEAN
#endif
#endif

#include <sys/stat.h>

#ifdef GEN_SYSTEM_MACOS
#include <copyfile.h>
#endif

#ifdef GEN_SYSTEM_CYGWIN
#include <windows.h>
#endif

#if defined( GEN_SYSTEM_WINDOWS ) && ! defined( GEN_COMPILER_GCC )
#include <io.h>
#endif

#if defined( GEN_SYSTEM_LINUX )
#include <sys/types.h>
#endif

#ifdef GEN_BENCHMARK
// Timing includes
#if defined( GEN_SYSTEM_MACOS ) || GEN_SYSTEM_UNIX
#include <time.h>
#include <sys/time.h>
#endif

#if defined( GEN_SYSTEM_MACOS )
#include <mach/mach.h>
#include <mach/mach_time.h>
#include <mach/clock.h>
#endif

#if defined( GEN_SYSTEM_EMSCRIPTEN )
#include <emscripten.h>
#endif

#if defined( GEN_SYSTEM_WINDOWS )
#include <timezoneapi.h>
#endif
#endif

#pragma endregion Macros and Includes

#pragma region Debug

void assert_handler( char const* condition, char const* file, s32 line, char const* msg, ... )
{
	_printf_err( "%s:(%d): Assert Failure: ", file, line );

	if ( condition )
		_printf_err( "`%s` \n", condition );

	if ( msg )
	{
		va_list va;
		va_start( va, msg );
		_printf_err_va( msg, va );
		va_end( va );
	}

	_printf_err( "%s", "\n" );
}

s32 assert_crash( char const* condition )
{
	GEN_PANIC( condition );
	return 0;
}

#if defined( GEN_SYSTEM_WINDOWS )
void process_exit( u32 code )
{
	ExitProcess( code );
}
#else
#include <stdlib.h>

void process_exit( u32 code )
{
	exit( code );
}
#endif

#pragma endregion Debug

#pragma region String Ops

internal sw _scan_zpl_i64( const char* text, s32 base, s64* value )
{
	const char* text_begin = text;
	s64         result     = 0;
	b32         negative   = false;

	if ( *text == '-' )
	{
		negative = true;
		text++;
	}

	if ( base == 16 && str_compare( text, "0x", 2 ) == 0 )
		text += 2;

	for ( ;; )
	{
		s64 v;
		if ( char_is_digit( *text ) )
			v = *text - '0';
		else if ( base == 16 && char_is_hex_digit( *text ) )
			v = hex_digit_to_int( *text );
		else
			break;

		result *= base;
		result += v;
		text++;
	}

	if ( value )
	{
		if ( negative )
			result = -result;
		*value = result;
	}

	return ( text - text_begin );
}

// TODO : Are these good enough for characters?
global const char _num_to_char_table[] =
"0123456789"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"@$";

s64 str_to_i64( const char* str, char** end_ptr, s32 base )
{
	sw  len;
	s64 value;

	if ( ! base )
	{
		if ( ( str_len( str ) > 2 ) && ( str_compare( str, "0x", 2 ) == 0 ) )
			base = 16;
		else
			base = 10;
	}

	len = _scan_zpl_i64( str, base, &value );
	if ( end_ptr )
		*end_ptr = ( char* )str + len;
	return value;
}

void i64_to_str( s64 value, char* string, s32 base )
{
	char* buf      = string;
	b32   negative = false;
	u64   v;

	if ( value < 0 )
	{
		negative = true;
		value    = -value;
	}

	v = zpl_cast( u64 ) value;
	if ( v != 0 )
	{
		while ( v > 0 )
		{
			*buf++  = _num_to_char_table[ v % base ];
			v      /= base;
		}
	}
	else
	{
		*buf++ = '0';
	}
	if ( negative )
		*buf++ = '-';
	*buf = '\0';
	str_reverse( string );
}

void u64_to_str( u64 value, char* string, s32 base )
{
	char* buf = string;

	if ( value )
	{
		while ( value > 0 )
		{
			*buf++  = _num_to_char_table[ value % base ];
			value  /= base;
		}
	}
	else
	{
		*buf++ = '0';
	}
	*buf = '\0';

	str_reverse( string );
}

f64 str_to_f64( const char* str, char** end_ptr )
{
	f64 result, value, sign, scale;
	s32 frac;

	while ( char_is_space( *str ) )
	{
		str++;
	}

	sign = 1.0;
	if ( *str == '-' )
	{
		sign = -1.0;
		str++;
	}
	else if ( *str == '+' )
	{
		str++;
	}

	for ( value = 0.0; char_is_digit( *str ); str++ )
	{
		value = value * 10.0 + ( *str - '0' );
	}

	if ( *str == '.' )
	{
		f64 pow10 = 10.0;
		str++;
		while ( char_is_digit( *str ) )
		{
			value += ( *str - '0' ) / pow10;
			pow10 *= 10.0;
			str++;
		}
	}

	frac  = 0;
	scale = 1.0;
	if ( ( *str == 'e' ) || ( *str == 'E' ) )
	{
		u32 exp;

		str++;
		if ( *str == '-' )
		{
			frac = 1;
			str++;
		}
		else if ( *str == '+' )
		{
			str++;
		}

		for ( exp = 0; char_is_digit( *str ); str++ )
		{
			exp = exp * 10 + ( *str - '0' );
		}
		if ( exp > 308 )
			exp = 308;

		while ( exp >= 50 )
		{
			scale *= 1e50;
			exp   -= 50;
		}
		while ( exp >= 8 )
		{
			scale *= 1e8;
			exp   -= 8;
		}
		while ( exp > 0 )
		{
			scale *= 10.0;
			exp   -= 1;
		}
	}

	result = sign * ( frac ? ( value / scale ) : ( value * scale ) );

	if ( end_ptr )
		*end_ptr = zpl_cast( char* ) str;

	return result;
}

#pragma endregion String Ops

#pragma region Printing

enum
{
	GEN_FMT_MINUS    = bit( 0 ),
	GEN_FMT_PLUS     = bit( 1 ),
	GEN_FMT_ALT      = bit( 2 ),
	GEN_FMT_SPACE    = bit( 3 ),
	GEN_FMT_ZERO     = bit( 4 ),

	GEN_FMT_CHAR     = bit( 5 ),
	GEN_FMT_SHORT    = bit( 6 ),
	GEN_FMT_INT      = bit( 7 ),
	GEN_FMT_LONG     = bit( 8 ),
	GEN_FMT_LLONG    = bit( 9 ),
	GEN_FMT_SIZE     = bit( 10 ),
	GEN_FMT_INTPTR   = bit( 11 ),

	GEN_FMT_UNSIGNED = bit( 12 ),
	GEN_FMT_LOWER    = bit( 13 ),
	GEN_FMT_UPPER    = bit( 14 ),
	GEN_FMT_WIDTH    = bit( 15 ),

	GEN_FMT_DONE     = bit( 30 ),

	GEN_FMT_INTS     = GEN_FMT_CHAR | GEN_FMT_SHORT | GEN_FMT_INT | GEN_FMT_LONG | GEN_FMT_LLONG | GEN_FMT_SIZE | GEN_FMT_INTPTR
};

struct _format_info
{
	s32 base;
	s32 flags;
	s32 width;
	s32 precision;
};

internal sw _print_string( char* text, sw max_len, _format_info* info, char const* str )
{
	sw    res = 0, len = 0;
	sw    remaining = max_len;
	char* begin     = text;

	if ( str == NULL && max_len >= 6 )
	{
		res += str_copy_nulpad( text, "(null)", 6 );
		return res;
	}

	if ( info && info->precision >= 0 )
		// Made the design decision for this library that precision is the length of the string.
		len = info->precision;
	else
		len = str_len( str );

	if ( info && ( info->width == 0 && info->flags & GEN_FMT_WIDTH ) )
	{
		return res;
	}

	if ( info && ( info->width == 0 || info->flags & GEN_FMT_MINUS ) )
	{
		if ( info->precision > 0 )
			len = info->precision < len ? info->precision : len;
		if ( res + len > max_len )
			return res;
		res  += str_copy_nulpad( text, str, len );
		text += res;

		if ( info->width > res )
		{
			sw padding = info->width - len;

			char pad   = ( info->flags & GEN_FMT_ZERO ) ? '0' : ' ';
			while ( padding-- > 0 && remaining-- > 0 )
				*text++ = pad, res++;
		}
	}
	else
	{
		if ( info && ( info->width > res ) )
		{
			sw   padding = info->width - len;
			char pad     = ( info->flags & GEN_FMT_ZERO ) ? '0' : ' ';
			while ( padding-- > 0 && remaining-- > 0 )
				*text++ = pad, res++;
		}

		if ( res + len > max_len )
			return res;
		res += str_copy_nulpad( text, str, len );
	}

	if ( info )
	{
		if ( info->flags & GEN_FMT_UPPER )
			str_to_upper( begin );
		else if ( info->flags & GEN_FMT_LOWER )
			str_to_lower( begin );
	}

	return res;
}

internal sw _print_char( char* text, sw max_len, _format_info* info, char arg )
{
	char str[ 2 ] = "";
	str[ 0 ]      = arg;
	return _print_string( text, max_len, info, str );
}

internal sw _print_repeated_char( char* text, sw max_len, _format_info* info, char arg )
{
	sw  res = 0;
	s32 rem = ( info ) ? ( info->width > 0 ) ? info->width : 1 : 1;
	res     = rem;
	while ( rem-- > 0 )
		*text++ = arg;

	return res;
}

internal sw _print_i64( char* text, sw max_len, _format_info* info, s64 value )
{
	char num[ 130 ];
	i64_to_str( value, num, info ? info->base : 10 );
	return _print_string( text, max_len, info, num );
}

internal sw _print_u64( char* text, sw max_len, _format_info* info, u64 value )
{
	char num[ 130 ];
	u64_to_str( value, num, info ? info->base : 10 );
	return _print_string( text, max_len, info, num );
}

internal sw _print_f64( char* text, sw max_len, _format_info* info, b32 is_hexadecimal, f64 arg )
{
	// TODO: Handle exponent notation
	sw    width, len, remaining = max_len;
	char* text_begin = text;

	if ( arg )
	{
		u64 value;
		if ( arg < 0 )
		{
			if ( remaining > 1 )
				*text = '-', remaining--;
			text++;
			arg = -arg;
		}
		else if ( info->flags & GEN_FMT_MINUS )
		{
			if ( remaining > 1 )
				*text = '+', remaining--;
			text++;
		}

		value  = zpl_cast( u64 ) arg;
		len    = _print_u64( text, remaining, NULL, value );
		text  += len;

		if ( len >= remaining )
			remaining = min( remaining, 1 );
		else
			remaining -= len;
		arg -= value;

		if ( info->precision < 0 )
			info->precision = 6;

		if ( ( info->flags & GEN_FMT_ALT ) || info->precision > 0 )
		{
			s64 mult = 10;
			if ( remaining > 1 )
				*text = '.', remaining--;
			text++;
			while ( info->precision-- > 0 )
			{
				value  = zpl_cast( u64 )( arg * mult );
				len    = _print_u64( text, remaining, NULL, value );
				text  += len;
				if ( len >= remaining )
					remaining = min( remaining, 1 );
				else
					remaining -= len;
				arg  -= zpl_cast( f64 ) value / mult;
				mult *= 10;
			}
		}
	}
	else
	{
		if ( remaining > 1 )
			*text = '0', remaining--;
		text++;
		if ( info->flags & GEN_FMT_ALT )
		{
			if ( remaining > 1 )
				*text = '.', remaining--;
			text++;
		}
	}

	width = info->width - ( text - text_begin );
	if ( width > 0 )
	{
		char  fill = ( info->flags & GEN_FMT_ZERO ) ? '0' : ' ';
		char* end  = text + remaining - 1;
		len        = ( text - text_begin );

		for ( len = ( text - text_begin ); len--; )
		{
			if ( ( text_begin + len + width ) < end )
				*( text_begin + len + width ) = *( text_begin + len );
		}

		len   = width;
		text += len;
		if ( len >= remaining )
			remaining = min( remaining, 1 );
		else
			remaining -= len;

		while ( len-- )
		{
			if ( text_begin + len < end )
				text_begin[ len ] = fill;
		}
	}

	return ( text - text_begin );
}

neverinline sw str_fmt_va( char* text, sw max_len, char const* fmt, va_list va )
{
	char const* text_begin = text;
	sw          remaining  = max_len, res;

	while ( *fmt )
	{
		_format_info info = { 0 };
		sw           len  = 0;
		info.precision    = -1;

		while ( *fmt && *fmt != '%' && remaining )
			*text++ = *fmt++;

		if ( *fmt == '%' )
		{
			do
			{
				switch ( *++fmt )
				{
					case '-' :
					{
						info.flags |= GEN_FMT_MINUS;
						break;
					}
					case '+' :
					{
						info.flags |= GEN_FMT_PLUS;
						break;
					}
					case '#' :
					{
						info.flags |= GEN_FMT_ALT;
						break;
					}
					case ' ' :
					{
						info.flags |= GEN_FMT_SPACE;
						break;
					}
					case '0' :
					{
						info.flags |= ( GEN_FMT_ZERO | GEN_FMT_WIDTH );
						break;
					}
					default :
					{
						info.flags |= GEN_FMT_DONE;
						break;
					}
				}
			} while ( ! ( info.flags & GEN_FMT_DONE ) );
		}

		// NOTE: Optional Width
		if ( *fmt == '*' )
		{
			int width = va_arg( va, int );
			if ( width < 0 )
			{
				info.flags |= GEN_FMT_MINUS;
				info.width  = -width;
			}
			else
			{
				info.width = width;
			}
			info.flags |= GEN_FMT_WIDTH;
			fmt++;
		}
		else
		{
			info.width = zpl_cast( s32 ) str_to_i64( fmt, zpl_cast( char** ) & fmt, 10 );
			if ( info.width != 0 )
			{
				info.flags |= GEN_FMT_WIDTH;
			}
		}

		// NOTE: Optional Precision
		if ( *fmt == '.' )
		{
			fmt++;
			if ( *fmt == '*' )
			{
				info.precision = va_arg( va, int );
				fmt++;
			}
			else
			{
				info.precision = zpl_cast( s32 ) str_to_i64( fmt, zpl_cast( char** ) & fmt, 10 );
			}
			info.flags &= ~GEN_FMT_ZERO;
		}

		switch ( *fmt++ )
		{
			case 'h' :
				if ( *fmt == 'h' )
				{    // hh => char
					info.flags |= GEN_FMT_CHAR;
					fmt++;
				}
				else
				{    // h => short
					info.flags |= GEN_FMT_SHORT;
				}
				break;

			case 'l' :
				if ( *fmt == 'l' )
				{    // ll => long long
					info.flags |= GEN_FMT_LLONG;
					fmt++;
				}
				else
				{    // l => long
					info.flags |= GEN_FMT_LONG;
				}
				break;

				break;

			case 'z' :    // NOTE: zpl_usize
				info.flags |= GEN_FMT_UNSIGNED;
				// fallthrough
			case 't' :    // NOTE: zpl_isize
				info.flags |= GEN_FMT_SIZE;
				break;

			default :
				fmt--;
				break;
		}

		switch ( *fmt )
		{
			case 'u' :
				info.flags |= GEN_FMT_UNSIGNED;
				// fallthrough
			case 'd' :
			case 'i' :
				info.base = 10;
				break;

			case 'o' :
				info.base = 8;
				break;

			case 'x' :
				info.base   = 16;
				info.flags |= ( GEN_FMT_UNSIGNED | GEN_FMT_LOWER );
				break;

			case 'X' :
				info.base   = 16;
				info.flags |= ( GEN_FMT_UNSIGNED | GEN_FMT_UPPER );
				break;

			case 'f' :
			case 'F' :
			case 'g' :
			case 'G' :
				len = _print_f64( text, remaining, &info, 0, va_arg( va, f64 ) );
				break;

			case 'a' :
			case 'A' :
				len = _print_f64( text, remaining, &info, 1, va_arg( va, f64 ) );
				break;

			case 'c' :
				len = _print_char( text, remaining, &info, zpl_cast( char ) va_arg( va, int ) );
				break;

			case 's' :
				len = _print_string( text, remaining, &info, va_arg( va, char* ) );
				break;

			case 'S' :
			{
				String gen_str = String { va_arg( va, char* ) };

				info.precision = gen_str.length();
				len            = _print_string( text, remaining, &info, gen_str );
			}
			break;

			case 'r' :
				len = _print_repeated_char( text, remaining, &info, va_arg( va, int ) );
				break;

			case 'p' :
				info.base   = 16;
				info.flags |= ( GEN_FMT_LOWER | GEN_FMT_UNSIGNED | GEN_FMT_ALT | GEN_FMT_INTPTR );
				break;

			case '%' :
				len = _print_char( text, remaining, &info, '%' );
				break;

			default :
				fmt--;
				break;
		}

		fmt++;

		if ( info.base != 0 )
		{
			if ( info.flags & GEN_FMT_UNSIGNED )
			{
				u64 value = 0;
				switch ( info.flags & GEN_FMT_INTS )
				{
					case GEN_FMT_CHAR :
						value = zpl_cast( u64 ) zpl_cast( u8 ) va_arg( va, int );
						break;
					case GEN_FMT_SHORT :
						value = zpl_cast( u64 ) zpl_cast( u16 ) va_arg( va, int );
						break;
					case GEN_FMT_LONG :
						value = zpl_cast( u64 ) va_arg( va, unsigned long );
						break;
					case GEN_FMT_LLONG :
						value = zpl_cast( u64 ) va_arg( va, unsigned long long );
						break;
					case GEN_FMT_SIZE :
						value = zpl_cast( u64 ) va_arg( va, uw );
						break;
					case GEN_FMT_INTPTR :
						value = zpl_cast( u64 ) va_arg( va, uptr );
						break;
					default :
						value = zpl_cast( u64 ) va_arg( va, unsigned int );
						break;
				}

				len = _print_u64( text, remaining, &info, value );
			}
			else
			{
				s64 value = 0;
				switch ( info.flags & GEN_FMT_INTS )
				{
					case GEN_FMT_CHAR :
						value = zpl_cast( s64 ) zpl_cast( s8 ) va_arg( va, int );
						break;
					case GEN_FMT_SHORT :
						value = zpl_cast( s64 ) zpl_cast( s16 ) va_arg( va, int );
						break;
					case GEN_FMT_LONG :
						value = zpl_cast( s64 ) va_arg( va, long );
						break;
					case GEN_FMT_LLONG :
						value = zpl_cast( s64 ) va_arg( va, long long );
						break;
					case GEN_FMT_SIZE :
						value = zpl_cast( s64 ) va_arg( va, uw );
						break;
					case GEN_FMT_INTPTR :
						value = zpl_cast( s64 ) va_arg( va, uptr );
						break;
					default :
						value = zpl_cast( s64 ) va_arg( va, int );
						break;
				}

				len = _print_i64( text, remaining, &info, value );
			}
		}

		text += len;
		if ( len >= remaining )
			remaining = min( remaining, 1 );
		else
			remaining -= len;
	}

	*text++ = '\0';
	res     = ( text - text_begin );
	return ( res >= max_len || res < 0 ) ? -1 : res;
}

char* str_fmt_buf_va( char const* fmt, va_list va )
{
	local_persist thread_local char buffer[ GEN_PRINTF_MAXLEN ];
	str_fmt_va( buffer, size_of( buffer ), fmt, va );
	return buffer;
}

char* str_fmt_buf( char const* fmt, ... )
{
	va_list va;
	char*   str;
	va_start( va, fmt );
	str = str_fmt_buf_va( fmt, va );
	va_end( va );
	return str;
}

sw str_fmt_file_va( struct FileInfo* f, char const* fmt, va_list va )
{
	local_persist thread_local char buf[ GEN_PRINTF_MAXLEN ];
	sw                              len = str_fmt_va( buf, size_of( buf ), fmt, va );
	b32                             res = file_write( f, buf, len - 1 );    // NOTE: prevent extra whitespace
	return res ? len : -1;
}

sw str_fmt_file( struct FileInfo* f, char const* fmt, ... )
{
	sw      res;
	va_list va;
	va_start( va, fmt );
	res = str_fmt_file_va( f, fmt, va );
	va_end( va );
	return res;
}

sw str_fmt( char* str, sw n, char const* fmt, ... )
{
	sw      res;
	va_list va;
	va_start( va, fmt );
	res = str_fmt_va( str, n, fmt, va );
	va_end( va );
	return res;
}

sw str_fmt_out_va( char const* fmt, va_list va )
{
	return str_fmt_file_va( file_get_standard( EFileStandard_OUTPUT ), fmt, va );
}

sw str_fmt_out_err_va( char const* fmt, va_list va )
{
	return str_fmt_file_va( file_get_standard( EFileStandard_ERROR ), fmt, va );
}

sw str_fmt_out_err( char const* fmt, ... )
{
	sw      res;
	va_list va;
	va_start( va, fmt );
	res = str_fmt_out_err_va( fmt, va );
	va_end( va );
	return res;
}

#pragma endregion Printing

#pragma region Memory

void* mem_copy( void* dest, void const* source, sw n )
{
	if ( dest == NULL )
	{
		return NULL;
	}

	return memcpy( dest, source, n );
}

void const* mem_find( void const* data, u8 c, sw n )
{
	u8 const* s = zpl_cast( u8 const* ) data;
	while ( ( zpl_cast( uptr ) s & ( sizeof( uw ) - 1 ) ) && n && *s != c )
	{
		s++;
		n--;
	}
	if ( n && *s != c )
	{
		sw const* w;
		sw        k = GEN__ONES * c;
		w           = zpl_cast( sw const* ) s;
		while ( n >= size_of( sw ) && ! GEN__HAS_ZERO( *w ^ k ) )
		{
			w++;
			n -= size_of( sw );
		}
		s = zpl_cast( u8 const* ) w;
		while ( n && *s != c )
		{
			s++;
			n--;
		}
	}

	return n ? zpl_cast( void const* ) s : NULL;
}

#define GEN_HEAP_STATS_MAGIC 0xDEADC0DE

struct _heap_stats
{
	u32 magic;
	sw  used_memory;
	sw  alloc_count;
};

global _heap_stats _heap_stats_info;

void heap_stats_init( void )
{
	zero_item( &_heap_stats_info );
	_heap_stats_info.magic = GEN_HEAP_STATS_MAGIC;
}

sw heap_stats_used_memory( void )
{
	GEN_ASSERT_MSG( _heap_stats_info.magic == GEN_HEAP_STATS_MAGIC, "heap_stats is not initialised yet, call heap_stats_init first!" );
	return _heap_stats_info.used_memory;
}

sw heap_stats_alloc_count( void )
{
	GEN_ASSERT_MSG( _heap_stats_info.magic == GEN_HEAP_STATS_MAGIC, "heap_stats is not initialised yet, call heap_stats_init first!" );
	return _heap_stats_info.alloc_count;
}

void heap_stats_check( void )
{
	GEN_ASSERT_MSG( _heap_stats_info.magic == GEN_HEAP_STATS_MAGIC, "heap_stats is not initialised yet, call heap_stats_init first!" );
	GEN_ASSERT( _heap_stats_info.used_memory == 0 );
	GEN_ASSERT( _heap_stats_info.alloc_count == 0 );
}

struct _heap_alloc_info
{
	sw    size;
	void* physical_start;
};

void* heap_allocator_proc( void* allocator_data, AllocType type, sw size, sw alignment, void* old_memory, sw old_size, u64 flags )
{
	void* ptr = NULL;
	// unused( allocator_data );
	// unused( old_size );
	if ( ! alignment )
		alignment = GEN_DEFAULT_MEMORY_ALIGNMENT;

#ifdef GEN_HEAP_ANALYSIS
	sw alloc_info_size      = size_of( _heap_alloc_info );
	sw alloc_info_remainder = ( alloc_info_size % alignment );
	sw track_size           = max( alloc_info_size, alignment ) + alloc_info_remainder;
	switch ( type )
	{
		case EAllocation_FREE :
		{
			if ( ! old_memory )
				break;
			_heap_alloc_info* alloc_info  = zpl_cast( _heap_alloc_info* ) old_memory - 1;
			_heap_stats_info.used_memory -= alloc_info->size;
			_heap_stats_info.alloc_count--;
			old_memory = alloc_info->physical_start;
		}
		break;
		case EAllocation_ALLOC :
		{
			size += track_size;
		}
		break;
		default :
			break;
	}
#endif

	switch ( type )
	{
#if defined( GEN_COMPILER_MSVC ) || ( defined( GEN_COMPILER_GCC ) && defined( GEN_SYSTEM_WINDOWS ) ) \
|| ( defined( GEN_COMPILER_TINYC ) && defined( GEN_SYSTEM_WINDOWS ) )
		case EAllocation_ALLOC :
			ptr = _aligned_malloc( size, alignment );
			if ( flags & ALLOCATOR_FLAG_CLEAR_TO_ZERO )
				zero_size( ptr, size );
			break;
		case EAllocation_FREE :
			_aligned_free( old_memory );
			break;
		case EAllocation_RESIZE :
		{
			AllocatorInfo a = heap();
			ptr             = default_resize_align( a, old_memory, old_size, size, alignment );
		}
		break;

#elif defined( GEN_SYSTEM_LINUX ) && ! defined( GEN_CPU_ARM ) && ! defined( GEN_COMPILER_TINYC )
		case EAllocation_ALLOC :
		{
			ptr = aligned_alloc( alignment, ( size + alignment - 1 ) & ~( alignment - 1 ) );

			if ( flags & GEN_ALLOCATOR_FLAG_CLEAR_TO_ZERO )
			{
				zero_size( ptr, size );
			}
		}
		break;

		case EAllocation_FREE :
		{
			free( old_memory );
		}
		break;

		case EAllocation_RESIZE :
		{
			AllocatorInfo a = heap();
			ptr             = default_resize_align( a, old_memory, old_size, size, alignment );
		}
		break;
#else
		case EAllocation_ALLOC :
		{
			posix_memalign( &ptr, alignment, size );

			if ( flags & GEN_ALLOCATOR_FLAG_CLEAR_TO_ZERO )
			{
				zero_size( ptr, size );
			}
		}
		break;

		case EAllocation_FREE :
		{
			free( old_memory );
		}
		break;

		case EAllocation_RESIZE :
		{
			AllocatorInfo a = heap();
			ptr             = default_resize_align( a, old_memory, old_size, size, alignment );
		}
		break;
#endif

		case EAllocation_FREE_ALL :
			break;
	}

#ifdef GEN_HEAP_ANALYSIS
	if ( type == EAllocation_ALLOC )
	{
		_heap_alloc_info* alloc_info = zpl_cast( _heap_alloc_info* )( zpl_cast( char* ) ptr + alloc_info_remainder );
		zero_item( alloc_info );
		alloc_info->size              = size - track_size;
		alloc_info->physical_start    = ptr;
		ptr                           = zpl_cast( void* )( alloc_info + 1 );
		_heap_stats_info.used_memory += alloc_info->size;
		_heap_stats_info.alloc_count++;
	}
#endif

	return ptr;
}

#pragma region VirtualMemory

VirtualMemory vm_from_memory( void* data, sw size )
{
	VirtualMemory vm;
	vm.data = data;
	vm.size = size;
	return vm;
}

#if defined( GEN_SYSTEM_WINDOWS )
VirtualMemory vm_alloc( void* addr, sw size )
{
	VirtualMemory vm;
	GEN_ASSERT( size > 0 );
	vm.data = VirtualAlloc( addr, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE );
	vm.size = size;
	return vm;
}

b32 vm_free( VirtualMemory vm )
{
	MEMORY_BASIC_INFORMATION info;
	while ( vm.size > 0 )
	{
		if ( VirtualQuery( vm.data, &info, size_of( info ) ) == 0 )
			return false;
		if ( info.BaseAddress != vm.data || info.AllocationBase != vm.data || info.State != MEM_COMMIT || info.RegionSize > zpl_cast( uw ) vm.size )
		{
			return false;
		}
		if ( VirtualFree( vm.data, 0, MEM_RELEASE ) == 0 )
			return false;
		vm.data  = pointer_add( vm.data, info.RegionSize );
		vm.size -= info.RegionSize;
	}
	return true;
}

VirtualMemory vm_trim( VirtualMemory vm, sw lead_size, sw size )
{
	VirtualMemory new_vm = { 0 };
	void*         ptr;
	GEN_ASSERT( vm.size >= lead_size + size );

	ptr = pointer_add( vm.data, lead_size );

	vm_free( vm );
	new_vm = vm_alloc( ptr, size );
	if ( new_vm.data == ptr )
		return new_vm;
	if ( new_vm.data )
		vm_free( new_vm );
	return new_vm;
}

b32 vm_purge( VirtualMemory vm )
{
	VirtualAlloc( vm.data, vm.size, MEM_RESET, PAGE_READWRITE );
	// NOTE: Can this really fail?
	return true;
}

sw virtual_memory_page_size( sw* alignment_out )
{
	SYSTEM_INFO info;
	GetSystemInfo( &info );
	if ( alignment_out )
		*alignment_out = info.dwAllocationGranularity;
	return info.dwPageSize;
}

#else
#include <sys/mman.h>

#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif
VirtualMemory vm_alloc( void* addr, sw size )
{
	VirtualMemory vm;
	GEN_ASSERT( size > 0 );
	vm.data = mmap( addr, size, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0 );
	vm.size = size;
	return vm;
}

b32 vm_free( VirtualMemory vm )
{
	munmap( vm.data, vm.size );
	return true;
}

VirtualMemory vm_trim( VirtualMemory vm, sw lead_size, sw size )
{
	void* ptr;
	sw    trail_size;
	GEN_ASSERT( vm.size >= lead_size + size );

	ptr        = pointer_add( vm.data, lead_size );
	trail_size = vm.size - lead_size - size;

	if ( lead_size != 0 )
		vm_free( vm_from_memory(( vm.data, lead_size ) );
	if ( trail_size != 0 )
		vm_free( vm_from_memory( ptr, trail_size ) );
	return vm_from_memory( ptr, size );
}

b32 vm_purge( VirtualMemory vm )
{
	int err = madvise( vm.data, vm.size, MADV_DONTNEED );
	return err != 0;
}

sw virtual_memory_page_size( sw* alignment_out )
{
	// TODO: Is this always true?
	sw result = zpl_cast( sw ) sysconf( _SC_PAGE_SIZE );
	if ( alignment_out )
		*alignment_out = result;
	return result;
}
#endif

#pragma endregion VirtualMemory

void* Arena::allocator_proc( void* allocator_data, AllocType type, sw size, sw alignment, void* old_memory, sw old_size, u64 flags )
{
	Arena* arena = rcast( Arena*, allocator_data );
	void*  ptr   = NULL;

	// unused( old_size );

	switch ( type )
	{
		case EAllocation_ALLOC :
		{
			void* end        = pointer_add( arena->PhysicalStart, arena->TotalUsed );
			sw    total_size = align_forward_i64( size, alignment );

			// NOTE: Out of memory
			if ( arena->TotalUsed + total_size > ( sw )arena->TotalSize )
			{
				// zpl__printf_err("%s", "Arena out of memory\n");
				GEN_FATAL( "Arena out of memory! (Possibly could not fit for the largest size Arena!!)" );
				return nullptr;
			}

			ptr               = align_forward( end, alignment );
			arena->TotalUsed += total_size;

			if ( flags & ALLOCATOR_FLAG_CLEAR_TO_ZERO )
				zero_size( ptr, size );
		}
		break;

		case EAllocation_FREE :
			// NOTE: Free all at once
			// Use Temp_Arena_Memory if you want to free a block
			break;

		case EAllocation_FREE_ALL :
			arena->TotalUsed = 0;
			break;

		case EAllocation_RESIZE :
		{
			// TODO : Check if ptr is on top of stack and just extend
			AllocatorInfo a = arena->Backing;
			ptr             = default_resize_align( a, old_memory, old_size, size, alignment );
		}
		break;
	}
	return ptr;
}

void* Pool::allocator_proc( void* allocator_data, AllocType type, sw size, sw alignment, void* old_memory, sw old_size, u64 flags )
{
	Pool* pool = zpl_cast( Pool* ) allocator_data;
	void* ptr  = NULL;

	// unused( old_size );

	switch ( type )
	{
		case EAllocation_ALLOC :
		{
			uptr next_free;

			GEN_ASSERT( size == pool->BlockSize );
			GEN_ASSERT( alignment == pool->BlockAlign );
			GEN_ASSERT( pool->FreeList != NULL );

			next_free        = *zpl_cast( uptr* ) pool->FreeList;
			ptr              = pool->FreeList;
			pool->FreeList   = zpl_cast( void* ) next_free;
			pool->TotalSize += pool->BlockSize;

			if ( flags & ALLOCATOR_FLAG_CLEAR_TO_ZERO )
				zero_size( ptr, size );
		}
		break;

		case EAllocation_FREE :
		{
			uptr* next;
			if ( old_memory == NULL )
				return NULL;

			next             = zpl_cast( uptr* ) old_memory;
			*next            = zpl_cast( uptr ) pool->FreeList;
			pool->FreeList   = old_memory;
			pool->TotalSize -= pool->BlockSize;
		}
		break;

		case EAllocation_FREE_ALL :
		{
			sw    actual_block_size, block_index;
			void* curr;
			uptr* end;

			actual_block_size = pool->BlockSize + pool->BlockAlign;
			pool->TotalSize   = 0;

			// NOTE: Init intrusive freelist
			curr = pool->PhysicalStart;
			for ( block_index = 0; block_index < pool->NumBlocks - 1; block_index++ )
			{
				uptr* next = zpl_cast( uptr* ) curr;
				*next      = zpl_cast( uptr ) curr + actual_block_size;
				curr       = pointer_add( curr, actual_block_size );
			}

			end            = zpl_cast( uptr* ) curr;
			*end           = zpl_cast( uptr ) NULL;
			pool->FreeList = pool->PhysicalStart;
		}
		break;

		case EAllocation_RESIZE :
			// NOTE: Cannot resize
			GEN_PANIC( "You cannot resize something allocated by with a pool." );
			break;
	}

	return ptr;
}

Pool Pool::init_align( AllocatorInfo backing, sw num_blocks, sw block_size, sw block_align )
{
	Pool pool = {};

	sw    actual_block_size, pool_size, block_index;
	void *data, *curr;
	uptr* end;

	zero_item( &pool );

	pool.Backing      = backing;
	pool.BlockSize    = block_size;
	pool.BlockAlign   = block_align;
	pool.NumBlocks    = num_blocks;

	actual_block_size = block_size + block_align;
	pool_size         = num_blocks * actual_block_size;

	data              = alloc_align( backing, pool_size, block_align );

	// NOTE: Init intrusive freelist
	curr = data;
	for ( block_index = 0; block_index < num_blocks - 1; block_index++ )
	{
		uptr* next = ( uptr* )curr;
		*next      = ( uptr )curr + actual_block_size;
		curr       = pointer_add( curr, actual_block_size );
	}

	end                = ( uptr* )curr;
	*end               = ( uptr )NULL;

	pool.PhysicalStart = data;
	pool.FreeList      = data;

	return pool;
}

void Pool::clear()
{
	sw    actual_block_size, block_index;
	void* curr;
	uptr* end;

	actual_block_size = BlockSize + BlockAlign;

	curr              = PhysicalStart;
	for ( block_index = 0; block_index < NumBlocks - 1; block_index++ )
	{
		uptr* next = ( uptr* )curr;
		*next      = ( uptr )curr + actual_block_size;
		curr       = pointer_add( curr, actual_block_size );
	}

	end      = ( uptr* )curr;
	*end     = ( uptr )NULL;

	FreeList = PhysicalStart;
}

#pragma endregion Memory

#pragma region Hashing

global u32 const _crc32_table[ 256 ] = {
	0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b,
	0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, 0x646ba8c0,
	0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd,
	0xa50ab56b, 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
	0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
	0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
	0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea,
	0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
	0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525,
	0x206f85b3, 0xb966d409, 0xce61e49f, 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
	0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27,
	0x7d079eb1, 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
	0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda,
	0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703,
	0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
	0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
	0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff,
	0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
	0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729,
	0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
};

u32 crc32( void const* data, sw len )
{
	sw        remaining;
	u32       result = ~( zpl_cast( u32 ) 0 );
	u8 const* c      = zpl_cast( u8 const* ) data;
	for ( remaining = len; remaining--; c++ )
		result = ( result >> 8 ) ^ ( _crc32_table[ ( result ^ *c ) & 0xff ] );
	return ~result;
}

global u64 const _crc64_table[ 256 ] = {
	0x0000000000000000ull, 0x7ad870c830358979ull, 0xf5b0e190606b12f2ull, 0x8f689158505e9b8bull, 0xc038e5739841b68full, 0xbae095bba8743ff6ull,
	0x358804e3f82aa47dull, 0x4f50742bc81f2d04ull, 0xab28ecb46814fe75ull, 0xd1f09c7c5821770cull, 0x5e980d24087fec87ull, 0x24407dec384a65feull,
	0x6b1009c7f05548faull, 0x11c8790fc060c183ull, 0x9ea0e857903e5a08ull, 0xe478989fa00bd371ull, 0x7d08ff3b88be6f81ull, 0x07d08ff3b88be6f8ull,
	0x88b81eabe8d57d73ull, 0xf2606e63d8e0f40aull, 0xbd301a4810ffd90eull, 0xc7e86a8020ca5077ull, 0x4880fbd87094cbfcull, 0x32588b1040a14285ull,
	0xd620138fe0aa91f4ull, 0xacf86347d09f188dull, 0x2390f21f80c18306ull, 0x594882d7b0f40a7full, 0x1618f6fc78eb277bull, 0x6cc0863448deae02ull,
	0xe3a8176c18803589ull, 0x997067a428b5bcf0ull, 0xfa11fe77117cdf02ull, 0x80c98ebf2149567bull, 0x0fa11fe77117cdf0ull, 0x75796f2f41224489ull,
	0x3a291b04893d698dull, 0x40f16bccb908e0f4ull, 0xcf99fa94e9567b7full, 0xb5418a5cd963f206ull, 0x513912c379682177ull, 0x2be1620b495da80eull,
	0xa489f35319033385ull, 0xde51839b2936bafcull, 0x9101f7b0e12997f8ull, 0xebd98778d11c1e81ull, 0x64b116208142850aull, 0x1e6966e8b1770c73ull,
	0x8719014c99c2b083ull, 0xfdc17184a9f739faull, 0x72a9e0dcf9a9a271ull, 0x08719014c99c2b08ull, 0x4721e43f0183060cull, 0x3df994f731b68f75ull,
	0xb29105af61e814feull, 0xc849756751dd9d87ull, 0x2c31edf8f1d64ef6ull, 0x56e99d30c1e3c78full, 0xd9810c6891bd5c04ull, 0xa3597ca0a188d57dull,
	0xec09088b6997f879ull, 0x96d1784359a27100ull, 0x19b9e91b09fcea8bull, 0x636199d339c963f2ull, 0xdf7adabd7a6e2d6full, 0xa5a2aa754a5ba416ull,
	0x2aca3b2d1a053f9dull, 0x50124be52a30b6e4ull, 0x1f423fcee22f9be0ull, 0x659a4f06d21a1299ull, 0xeaf2de5e82448912ull, 0x902aae96b271006bull,
	0x74523609127ad31aull, 0x0e8a46c1224f5a63ull, 0x81e2d7997211c1e8ull, 0xfb3aa75142244891ull, 0xb46ad37a8a3b6595ull, 0xceb2a3b2ba0eececull,
	0x41da32eaea507767ull, 0x3b024222da65fe1eull, 0xa2722586f2d042eeull, 0xd8aa554ec2e5cb97ull, 0x57c2c41692bb501cull, 0x2d1ab4dea28ed965ull,
	0x624ac0f56a91f461ull, 0x1892b03d5aa47d18ull, 0x97fa21650afae693ull, 0xed2251ad3acf6feaull, 0x095ac9329ac4bc9bull, 0x7382b9faaaf135e2ull,
	0xfcea28a2faafae69ull, 0x8632586aca9a2710ull, 0xc9622c4102850a14ull, 0xb3ba5c8932b0836dull, 0x3cd2cdd162ee18e6ull, 0x460abd1952db919full,
	0x256b24ca6b12f26dull, 0x5fb354025b277b14ull, 0xd0dbc55a0b79e09full, 0xaa03b5923b4c69e6ull, 0xe553c1b9f35344e2ull, 0x9f8bb171c366cd9bull,
	0x10e3202993385610ull, 0x6a3b50e1a30ddf69ull, 0x8e43c87e03060c18ull, 0xf49bb8b633338561ull, 0x7bf329ee636d1eeaull, 0x012b592653589793ull,
	0x4e7b2d0d9b47ba97ull, 0x34a35dc5ab7233eeull, 0xbbcbcc9dfb2ca865ull, 0xc113bc55cb19211cull, 0x5863dbf1e3ac9decull, 0x22bbab39d3991495ull,
	0xadd33a6183c78f1eull, 0xd70b4aa9b3f20667ull, 0x985b3e827bed2b63ull, 0xe2834e4a4bd8a21aull, 0x6debdf121b863991ull, 0x1733afda2bb3b0e8ull,
	0xf34b37458bb86399ull, 0x8993478dbb8deae0ull, 0x06fbd6d5ebd3716bull, 0x7c23a61ddbe6f812ull, 0x3373d23613f9d516ull, 0x49aba2fe23cc5c6full,
	0xc6c333a67392c7e4ull, 0xbc1b436e43a74e9dull, 0x95ac9329ac4bc9b5ull, 0xef74e3e19c7e40ccull, 0x601c72b9cc20db47ull, 0x1ac40271fc15523eull,
	0x5594765a340a7f3aull, 0x2f4c0692043ff643ull, 0xa02497ca54616dc8ull, 0xdafce7026454e4b1ull, 0x3e847f9dc45f37c0ull, 0x445c0f55f46abeb9ull,
	0xcb349e0da4342532ull, 0xb1eceec59401ac4bull, 0xfebc9aee5c1e814full, 0x8464ea266c2b0836ull, 0x0b0c7b7e3c7593bdull, 0x71d40bb60c401ac4ull,
	0xe8a46c1224f5a634ull, 0x927c1cda14c02f4dull, 0x1d148d82449eb4c6ull, 0x67ccfd4a74ab3dbfull, 0x289c8961bcb410bbull, 0x5244f9a98c8199c2ull,
	0xdd2c68f1dcdf0249ull, 0xa7f41839ecea8b30ull, 0x438c80a64ce15841ull, 0x3954f06e7cd4d138ull, 0xb63c61362c8a4ab3ull, 0xcce411fe1cbfc3caull,
	0x83b465d5d4a0eeceull, 0xf96c151de49567b7ull, 0x76048445b4cbfc3cull, 0x0cdcf48d84fe7545ull, 0x6fbd6d5ebd3716b7ull, 0x15651d968d029fceull,
	0x9a0d8ccedd5c0445ull, 0xe0d5fc06ed698d3cull, 0xaf85882d2576a038ull, 0xd55df8e515432941ull, 0x5a3569bd451db2caull, 0x20ed197575283bb3ull,
	0xc49581ead523e8c2ull, 0xbe4df122e51661bbull, 0x3125607ab548fa30ull, 0x4bfd10b2857d7349ull, 0x04ad64994d625e4dull, 0x7e7514517d57d734ull,
	0xf11d85092d094cbfull, 0x8bc5f5c11d3cc5c6ull, 0x12b5926535897936ull, 0x686de2ad05bcf04full, 0xe70573f555e26bc4ull, 0x9ddd033d65d7e2bdull,
	0xd28d7716adc8cfb9ull, 0xa85507de9dfd46c0ull, 0x273d9686cda3dd4bull, 0x5de5e64efd965432ull, 0xb99d7ed15d9d8743ull, 0xc3450e196da80e3aull,
	0x4c2d9f413df695b1ull, 0x36f5ef890dc31cc8ull, 0x79a59ba2c5dc31ccull, 0x037deb6af5e9b8b5ull, 0x8c157a32a5b7233eull, 0xf6cd0afa9582aa47ull,
	0x4ad64994d625e4daull, 0x300e395ce6106da3ull, 0xbf66a804b64ef628ull, 0xc5bed8cc867b7f51ull, 0x8aeeace74e645255ull, 0xf036dc2f7e51db2cull,
	0x7f5e4d772e0f40a7ull, 0x05863dbf1e3ac9deull, 0xe1fea520be311aafull, 0x9b26d5e88e0493d6ull, 0x144e44b0de5a085dull, 0x6e963478ee6f8124ull,
	0x21c640532670ac20ull, 0x5b1e309b16452559ull, 0xd476a1c3461bbed2ull, 0xaeaed10b762e37abull, 0x37deb6af5e9b8b5bull, 0x4d06c6676eae0222ull,
	0xc26e573f3ef099a9ull, 0xb8b627f70ec510d0ull, 0xf7e653dcc6da3dd4ull, 0x8d3e2314f6efb4adull, 0x0256b24ca6b12f26ull, 0x788ec2849684a65full,
	0x9cf65a1b368f752eull, 0xe62e2ad306bafc57ull, 0x6946bb8b56e467dcull, 0x139ecb4366d1eea5ull, 0x5ccebf68aecec3a1ull, 0x2616cfa09efb4ad8ull,
	0xa97e5ef8cea5d153ull, 0xd3a62e30fe90582aull, 0xb0c7b7e3c7593bd8ull, 0xca1fc72bf76cb2a1ull, 0x45775673a732292aull, 0x3faf26bb9707a053ull,
	0x70ff52905f188d57ull, 0x0a2722586f2d042eull, 0x854fb3003f739fa5ull, 0xff97c3c80f4616dcull, 0x1bef5b57af4dc5adull, 0x61372b9f9f784cd4ull,
	0xee5fbac7cf26d75full, 0x9487ca0fff135e26ull, 0xdbd7be24370c7322ull, 0xa10fceec0739fa5bull, 0x2e675fb4576761d0ull, 0x54bf2f7c6752e8a9ull,
	0xcdcf48d84fe75459ull, 0xb71738107fd2dd20ull, 0x387fa9482f8c46abull, 0x42a7d9801fb9cfd2ull, 0x0df7adabd7a6e2d6ull, 0x772fdd63e7936bafull,
	0xf8474c3bb7cdf024ull, 0x829f3cf387f8795dull, 0x66e7a46c27f3aa2cull, 0x1c3fd4a417c62355ull, 0x935745fc4798b8deull, 0xe98f353477ad31a7ull,
	0xa6df411fbfb21ca3ull, 0xdc0731d78f8795daull, 0x536fa08fdfd90e51ull, 0x29b7d047efec8728ull,
};

u64 crc64( void const* data, sw len )
{
	sw        remaining;
	u64       result = ( zpl_cast( u64 ) 0 );
	u8 const* c      = zpl_cast( u8 const* ) data;
	for ( remaining = len; remaining--; c++ )
		result = ( result >> 8 ) ^ ( _crc64_table[ ( result ^ *c ) & 0xff ] );
	return result;
}

#pragma endregion Hashing

#pragma region String

String String::fmt( AllocatorInfo allocator, char* buf, sw buf_size, char const* fmt, ... )
{
	va_list va;
	va_start( va, fmt );
	str_fmt_va( buf, buf_size, fmt, va );
	va_end( va );

	return make( allocator, buf );
}

String String::make_length( AllocatorInfo allocator, char const* str, sw length )
{
	constexpr sw header_size = sizeof( Header );

	s32   alloc_size         = header_size + length + 1;
	void* allocation         = alloc( allocator, alloc_size );

	if ( allocation == nullptr )
		return { nullptr };

	Header& header = *rcast( Header*, allocation );
	header         = { allocator, length, length };

	String result  = { rcast( char*, allocation ) + header_size };

	if ( length && str )
		mem_copy( result, str, length );
	else
		mem_set( result, 0, alloc_size - header_size );

	result[ length ] = '\0';

	return result;
}

String String::make_reserve( AllocatorInfo allocator, sw capacity )
{
	constexpr sw header_size = sizeof( Header );

	s32   alloc_size         = header_size + capacity + 1;
	void* allocation         = alloc( allocator, alloc_size );

	if ( allocation == nullptr )
		return { nullptr };

	mem_set( allocation, 0, alloc_size );

	Header* header    = rcast( Header*, allocation );
	header->Allocator = allocator;
	header->Capacity  = capacity;
	header->Length    = 0;

	String result     = { rcast( char*, allocation ) + header_size };
	return result;
}

String String::fmt_buf( AllocatorInfo allocator, char const* fmt, ... )
{
	local_persist thread_local char buf[ GEN_PRINTF_MAXLEN ] = { 0 };

	va_list va;
	va_start( va, fmt );
	str_fmt_va( buf, GEN_PRINTF_MAXLEN, fmt, va );
	va_end( va );

	return make( allocator, buf );
}

bool String::append_fmt( char const* fmt, ... )
{
	sw   res;
	char buf[ GEN_PRINTF_MAXLEN ] = { 0 };

	va_list va;
	va_start( va, fmt );
	res = str_fmt_va( buf, count_of( buf ) - 1, fmt, va ) - 1;
	va_end( va );

	return append( buf, res );
}

bool String::make_space_for( char const* str, sw add_len )
{
	sw available = avail_space();

	// NOTE: Return if there is enough space left
	if ( available >= add_len )
	{
		return true;
	}
	else
	{
		sw new_len, old_size, new_size;

		void* ptr;
		void* new_ptr;

		AllocatorInfo allocator = get_header().Allocator;
		Header*       header    = nullptr;

		new_len                 = grow_formula( length() + add_len );
		ptr                     = &get_header();
		old_size                = size_of( Header ) + length() + 1;
		new_size                = size_of( Header ) + new_len + 1;

		new_ptr                 = resize( allocator, ptr, old_size, new_size );

		if ( new_ptr == nullptr )
			return false;

		header            = zpl_cast( Header* ) new_ptr;
		header->Allocator = allocator;
		header->Capacity  = new_len;

		Data              = rcast( char*, header + 1 );

		return str;
	}
}

#pragma endregion String

#pragma region File Handling

#if defined( GEN_SYSTEM_WINDOWS ) || defined( GEN_SYSTEM_CYGWIN )

internal wchar_t* _alloc_utf8_to_ucs2( AllocatorInfo a, char const* text, sw* w_len_ )
{
	wchar_t* w_text = NULL;
	sw       len = 0, w_len = 0, w_len1 = 0;
	if ( text == NULL )
	{
		if ( w_len_ )
			*w_len_ = w_len;
		return NULL;
	}
	len = str_len( text );
	if ( len == 0 )
	{
		if ( w_len_ )
			*w_len_ = w_len;
		return NULL;
	}
	w_len = MultiByteToWideChar( CP_UTF8, MB_ERR_INVALID_CHARS, text, zpl_cast( int ) len, NULL, 0 );
	if ( w_len == 0 )
	{
		if ( w_len_ )
			*w_len_ = w_len;
		return NULL;
	}
	w_text = alloc_array( a, wchar_t, w_len + 1 );
	w_len1 = MultiByteToWideChar( CP_UTF8, MB_ERR_INVALID_CHARS, text, zpl_cast( int ) len, w_text, zpl_cast( int ) w_len );
	if ( w_len1 == 0 )
	{
		free( a, w_text );
		if ( w_len_ )
			*w_len_ = 0;
		return NULL;
	}
	w_text[ w_len ] = 0;
	if ( w_len_ )
		*w_len_ = w_len;
	return w_text;
}

internal GEN_FILE_SEEK_PROC( _win32_file_seek )
{
	LARGE_INTEGER li_offset;
	li_offset.QuadPart = offset;
	if ( ! SetFilePointerEx( fd.p, li_offset, &li_offset, whence ) )
	{
		return false;
	}

	if ( new_offset )
		*new_offset = li_offset.QuadPart;
	return true;
}

internal GEN_FILE_READ_AT_PROC( _win32_file_read )
{
	// unused( stop_at_newline );
	b32 result = false;
	_win32_file_seek( fd, offset, ESeekWhence_BEGIN, NULL );
	DWORD size_ = zpl_cast( DWORD )( size > GEN_I32_MAX ? GEN_I32_MAX : size );
	DWORD bytes_read_;
	if ( ReadFile( fd.p, buffer, size_, &bytes_read_, NULL ) )
	{
		if ( bytes_read )
			*bytes_read = bytes_read_;
		result = true;
	}

	return result;
}

internal GEN_FILE_WRITE_AT_PROC( _win32_file_write )
{
	DWORD size_ = zpl_cast( DWORD )( size > GEN_I32_MAX ? GEN_I32_MAX : size );
	DWORD bytes_written_;
	_win32_file_seek( fd, offset, ESeekWhence_BEGIN, NULL );
	if ( WriteFile( fd.p, buffer, size_, &bytes_written_, NULL ) )
	{
		if ( bytes_written )
			*bytes_written = bytes_written_;
		return true;
	}
	return false;
}

internal GEN_FILE_CLOSE_PROC( _win32_file_close )
{
	CloseHandle( fd.p );
}

FileOperations const default_file_operations = { _win32_file_read, _win32_file_write, _win32_file_seek, _win32_file_close };

neverinline GEN_FILE_OPEN_PROC( _win32_file_open )
{
	DWORD    desired_access;
	DWORD    creation_disposition;
	void*    handle;
	wchar_t* w_text;

	switch ( mode & GEN_FILE_MODES )
	{
		case EFileMode_READ :
			desired_access       = GENERIC_READ;
			creation_disposition = OPEN_EXISTING;
			break;
		case EFileMode_WRITE :
			desired_access       = GENERIC_WRITE;
			creation_disposition = CREATE_ALWAYS;
			break;
		case EFileMode_APPEND :
			desired_access       = GENERIC_WRITE;
			creation_disposition = OPEN_ALWAYS;
			break;
		case EFileMode_READ | EFileMode_RW :
			desired_access       = GENERIC_READ | GENERIC_WRITE;
			creation_disposition = OPEN_EXISTING;
			break;
		case EFileMode_WRITE | EFileMode_RW :
			desired_access       = GENERIC_READ | GENERIC_WRITE;
			creation_disposition = CREATE_ALWAYS;
			break;
		case EFileMode_APPEND | EFileMode_RW :
			desired_access       = GENERIC_READ | GENERIC_WRITE;
			creation_disposition = OPEN_ALWAYS;
			break;
		default :
			GEN_PANIC( "Invalid file mode" );
			return EFileError_INVALID;
	}

	w_text = _alloc_utf8_to_ucs2( heap(), filename, NULL );
	handle = CreateFileW( w_text, desired_access, FILE_SHARE_READ | FILE_SHARE_DELETE, NULL, creation_disposition, FILE_ATTRIBUTE_NORMAL, NULL );

	free( heap(), w_text );

	if ( handle == INVALID_HANDLE_VALUE )
	{
		DWORD err = GetLastError();
		switch ( err )
		{
			case ERROR_FILE_NOT_FOUND :
				return EFileError_NOT_EXISTS;
			case ERROR_FILE_EXISTS :
				return EFileError_EXISTS;
			case ERROR_ALREADY_EXISTS :
				return EFileError_EXISTS;
			case ERROR_ACCESS_DENIED :
				return EFileError_PERMISSION;
		}
		return EFileError_INVALID;
	}

	if ( mode & EFileMode_APPEND )
	{
		LARGE_INTEGER offset = { { 0 } };
		if ( ! SetFilePointerEx( handle, offset, NULL, ESeekWhence_END ) )
		{
			CloseHandle( handle );
			return EFileError_INVALID;
		}
	}

	fd->p = handle;
	*ops  = default_file_operations;
	return EFileError_NONE;
}

#else    // POSIX
#include <fcntl.h>

internal GEN_FILE_SEEK_PROC( _posix_file_seek )
{
#if defined( GEN_SYSTEM_OSX )
	s64 res = lseek( fd.i, offset, whence );
#else    // TODO(ZaKlaus): @fixme lseek64
	s64 res = lseek( fd.i, offset, whence );
#endif
	if ( res < 0 )
		return false;
	if ( new_offset )
		*new_offset = res;
	return true;
}

internal GEN_FILE_READ_AT_PROC( _posix_file_read )
{
	unused( stop_at_newline );
	sw res = pread( fd.i, buffer, size, offset );
	if ( res < 0 )
		return false;
	if ( bytes_read )
		*bytes_read = res;
	return true;
}

internal GEN_FILE_WRITE_AT_PROC( _posix_file_write )
{
	sw  res;
	s64 curr_offset = 0;
	_posix_file_seek( fd, 0, ESeekWhence_CURRENT, &curr_offset );
	if ( curr_offset == offset )
	{
		// NOTE: Writing to stdout et al. doesn't like pwrite for numerous reasons
		res = write( zpl_cast( int ) fd.i, buffer, size );
	}
	else
	{
		res = pwrite( zpl_cast( int ) fd.i, buffer, size, offset );
	}
	if ( res < 0 )
		return false;
	if ( bytes_written )
		*bytes_written = res;
	return true;
}

internal GEN_FILE_CLOSE_PROC( _posix_file_close )
{
	close( fd.i );
}

FileOperations const default_file_operations = { _posix_file_read, _posix_file_write, _posix_file_seek, _posix_file_close };

neverinline GEN_FILE_OPEN_PROC( _posix_file_open )
{
	s32 os_mode;
	switch ( mode & GEN_FILE_MODES )
	{
		case EFileMode_READ :
			os_mode = O_RDONLY;
			break;
		case EFileMode_WRITE :
			os_mode = O_WRONLY | O_CREAT | O_TRUNC;
			break;
		case EFileMode_APPEND :
			os_mode = O_WRONLY | O_APPEND | O_CREAT;
			break;
		case EFileMode_READ | EFileMode_RW :
			os_mode = O_RDWR;
			break;
		case EFileMode_WRITE | EFileMode_RW :
			os_mode = O_RDWR | O_CREAT | O_TRUNC;
			break;
		case EFileMode_APPEND | EFileMode_RW :
			os_mode = O_RDWR | O_APPEND | O_CREAT;
			break;
		default :
			GEN_PANIC( "Invalid file mode" );
			return EFileError_INVALID;
	}

	fd->i = open( filename, os_mode, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH );
	if ( fd->i < 0 )
	{
		// TODO : More file errors
		return EFileError_INVALID;
	}

	*ops = default_file_operations;
	return EFileError_NONE;
}

// POSIX
#endif

internal void _dirinfo_free_entry( DirEntry* entry );

// TODO : Is this a bad idea?
global b32      _std_file_set                     = false;
global FileInfo _std_files[ EFileStandard_COUNT ] = {
	{{ nullptr, nullptr, nullptr, nullptr }, { nullptr }, 0, nullptr, 0, nullptr}
};

#if defined( GEN_SYSTEM_WINDOWS ) || defined( GEN_SYSTEM_CYGWIN )

FileInfo* file_get_standard( FileStandardType std )
{
	if ( ! _std_file_set )
	{
#define GEN__SET_STD_FILE( type, v ) \
	_std_files[ type ].fd.p = v;     \
	_std_files[ type ].ops  = default_file_operations
        GEN__SET_STD_FILE( EFileStandard_INPUT, GetStdHandle( STD_INPUT_HANDLE ) );
        GEN__SET_STD_FILE( EFileStandard_OUTPUT, GetStdHandle( STD_OUTPUT_HANDLE ) );
        GEN__SET_STD_FILE( EFileStandard_ERROR, GetStdHandle( STD_ERROR_HANDLE ) );
#undef GEN__SET_STD_FILE
		_std_file_set = true;
	}
	return &_std_files[ std ];
}

#else    // POSIX

FileInfo* file_get_standard( FileStandardType std )
{
	if ( ! _std_file_set )
	{
#define GEN__SET_STD_FILE( type, v ) \
	_std_files[ type ].fd.i = v;     \
	_std_files[ type ].ops  = default_file_operations
		GEN__SET_STD_FILE( EFileStandard_INPUT, 0 );
		GEN__SET_STD_FILE( EFileStandard_OUTPUT, 1 );
		GEN__SET_STD_FILE( EFileStandard_ERROR, 2 );
#undef GEN__SET_STD_FILE
		_std_file_set = true;
	}
	return &_std_files[ std ];
}

#endif

FileError file_close( FileInfo* f )
{
	if ( ! f )
		return EFileError_INVALID;

	if ( f->filename )
		free( heap(), zpl_cast( char* ) f->filename );

#if defined( GEN_SYSTEM_WINDOWS )
	if ( f->fd.p == INVALID_HANDLE_VALUE )
		return EFileError_INVALID;
#else
	if ( f->fd.i < 0 )
		return EFileError_INVALID;
#endif

	if ( f->is_temp )
	{
		f->ops.close( f->fd );
		return EFileError_NONE;
	}

	if ( ! f->ops.read_at )
		f->ops = default_file_operations;
	f->ops.close( f->fd );

#if 0
	if ( f->Dir )
	{
		_dirinfo_free_entry( f->Dir );
		mfree( f->Dir );
		f->Dir = NULL;
	}
#endif

	return EFileError_NONE;
}

FileError file_new( FileInfo* f, FileDescriptor fd, FileOperations ops, char const* filename )
{
	FileError err      = EFileError_NONE;
	sw        len      = str_len( filename );

	f->ops             = ops;
	f->fd              = fd;
	f->dir             = nullptr;
	f->last_write_time = 0;
	f->filename        = alloc_array( heap(), char, len + 1 );
	mem_copy( zpl_cast( char* ) f->filename, zpl_cast( char* ) filename, len + 1 );

	return err;
}

FileError file_open( FileInfo* f, char const* filename )
{
	return file_open_mode( f, EFileMode_READ, filename );
}

FileError file_open_mode( FileInfo* f, FileMode mode, char const* filename )
{
	FileInfo file_ = {
		{ nullptr, nullptr, nullptr, nullptr },
        { nullptr },
        0, nullptr, 0, nullptr
	};

	*f = file_;
	FileError err;

#if defined( GEN_SYSTEM_WINDOWS ) || defined( GEN_SYSTEM_CYGWIN )
	err = _win32_file_open( &f->fd, &f->ops, mode, filename );
#else
	err = _posix_file_open( &f->fd, &f->ops, mode, filename );
#endif

	if ( err == EFileError_NONE )
		return file_new( f, f->fd, f->ops, filename );

	return err;
}

s64 file_size( FileInfo* f )
{
	s64 size        = 0;
	s64 prev_offset = file_tell( f );

	file_seek_to_end( f );
	size = file_tell( f );

	file_seek( f, prev_offset );

	return size;
}

FileContents file_read_contents( AllocatorInfo a, b32 zero_terminate, char const* filepath )
{
	FileContents result;
	FileInfo     file;

	result.allocator = a;

	if ( file_open( &file, filepath ) == EFileError_NONE )
	{
		sw fsize = zpl_cast( sw ) file_size( &file );
		if ( fsize > 0 )
		{
			result.data = alloc( a, zero_terminate ? fsize + 1 : fsize );
			result.size = fsize;
			file_read_at( &file, result.data, result.size, 0 );
			if ( zero_terminate )
			{
				u8* str      = zpl_cast( u8* ) result.data;
				str[ fsize ] = '\0';
			}
		}
		file_close( &file );
	}

	return result;
}

struct _memory_fd
{
	u8            magic;
	u8*           buf;    //< zpl_array OR plain buffer if we can't write
	sw            cursor;
	AllocatorInfo allocator;

	FileStreamFlags flags;
	sw              cap;
};

#define GEN__FILE_STREAM_FD_MAGIC 37

GEN_DEF_INLINE FileDescriptor _file_stream_fd_make( _memory_fd* d );
GEN_DEF_INLINE _memory_fd*    _file_stream_from_fd( FileDescriptor fd );

GEN_IMPL_INLINE FileDescriptor _file_stream_fd_make( _memory_fd* d )
{
	FileDescriptor fd = { 0 };
	fd.p              = ( void* )d;
	return fd;
}

GEN_IMPL_INLINE _memory_fd* _file_stream_from_fd( FileDescriptor fd )
{
	_memory_fd* d = ( _memory_fd* )fd.p;
	GEN_ASSERT( d->magic == GEN__FILE_STREAM_FD_MAGIC );
	return d;
}

b8 file_stream_new( FileInfo* file, AllocatorInfo allocator )
{
	GEN_ASSERT_NOT_NULL( file );

	_memory_fd* d = ( _memory_fd* )alloc( allocator, size_of( _memory_fd ) );

	if ( ! d )
		return false;

	zero_item( file );
	d->magic     = GEN__FILE_STREAM_FD_MAGIC;
	d->allocator = allocator;
	d->flags     = EFileStream_CLONE_WRITABLE;
	d->cap       = 0;
	d->buf       = Array< u8 >::init( allocator );

	if ( ! d->buf )
		return false;

	file->ops             = memory_file_operations;
	file->fd              = _file_stream_fd_make( d );
	file->dir             = NULL;
	file->last_write_time = 0;
	file->filename        = NULL;
	file->is_temp         = true;
	return true;
}

b8 file_stream_open( FileInfo* file, AllocatorInfo allocator, u8* buffer, sw size, FileStreamFlags flags )
{
	GEN_ASSERT_NOT_NULL( file );
	_memory_fd* d = ( _memory_fd* )alloc( allocator, size_of( _memory_fd ) );
	if ( ! d )
		return false;
	zero_item( file );
	d->magic     = GEN__FILE_STREAM_FD_MAGIC;
	d->allocator = allocator;
	d->flags     = flags;
	if ( d->flags & EFileStream_CLONE_WRITABLE )
	{
		Array< u8 > arr = Array< u8 >::init_reserve( allocator, size );
		d->buf          = arr;

		if ( ! d->buf )
			return false;

		mem_copy( d->buf, buffer, size );
		d->cap                = size;

		arr.get_header()->Num = size;
	}
	else
	{
		d->buf = buffer;
		d->cap = size;
	}
	file->ops             = memory_file_operations;
	file->fd              = _file_stream_fd_make( d );
	file->dir             = NULL;
	file->last_write_time = 0;
	file->filename        = NULL;
	file->is_temp         = true;
	return true;
}

u8* file_stream_buf( FileInfo* file, sw* size )
{
	GEN_ASSERT_NOT_NULL( file );
	_memory_fd* d = _file_stream_from_fd( file->fd );
	if ( size )
		*size = d->cap;
	return d->buf;
}

internal GEN_FILE_SEEK_PROC( _memory_file_seek )
{
	_memory_fd* d      = _file_stream_from_fd( fd );
	sw          buflen = d->cap;

	if ( whence == ESeekWhence_BEGIN )
		d->cursor = 0;
	else if ( whence == ESeekWhence_END )
		d->cursor = buflen;

	d->cursor = max( 0, clamp( d->cursor + offset, 0, buflen ) );
	if ( new_offset )
		*new_offset = d->cursor;
	return true;
}

internal GEN_FILE_READ_AT_PROC( _memory_file_read )
{
	// unused( stop_at_newline );
	_memory_fd* d = _file_stream_from_fd( fd );
	mem_copy( buffer, d->buf + offset, size );
	if ( bytes_read )
		*bytes_read = size;
	return true;
}

internal GEN_FILE_WRITE_AT_PROC( _memory_file_write )
{
	_memory_fd* d = _file_stream_from_fd( fd );

	if ( ! ( d->flags & ( EFileStream_CLONE_WRITABLE | EFileStream_WRITABLE ) ) )
		return false;

	sw buflen   = d->cap;
	sw extralen = max( 0, size - ( buflen - offset ) );
	sw rwlen    = size - extralen;
	sw new_cap  = buflen + extralen;

	if ( d->flags & EFileStream_CLONE_WRITABLE )
	{
		Array< u8 > arr = { d->buf };

		if ( arr.get_header()->Capacity < new_cap )
		{
			if ( ! arr.grow( ( s64 )( new_cap ) ) )
				return false;
			d->buf = arr;
		}
	}

	mem_copy( d->buf + offset, buffer, rwlen );

	if ( ( d->flags & EFileStream_CLONE_WRITABLE ) && extralen > 0 )
	{
		Array< u8 > arr = { d->buf };

		mem_copy( d->buf + offset + rwlen, pointer_add_const( buffer, rwlen ), extralen );
		d->cap                     = new_cap;
		arr.get_header()->Capacity = new_cap;
	}
	else
	{
		extralen = 0;
	}

	if ( bytes_written )
		*bytes_written = ( rwlen + extralen );
	return true;
}

internal GEN_FILE_CLOSE_PROC( _memory_file_close )
{
	_memory_fd*   d         = _file_stream_from_fd( fd );
	AllocatorInfo allocator = d->allocator;

	if ( d->flags & EFileStream_CLONE_WRITABLE )
	{
		Array< u8 > arr = { d->buf };
		arr.free();
	}

	free( allocator, d );
}

FileOperations const memory_file_operations = { _memory_file_read, _memory_file_write, _memory_file_seek, _memory_file_close };

#pragma endregion File Handling

#pragma region Timing

#ifdef GEN_BENCHMARK
#if defined( GEN_COMPILER_MSVC ) && ! defined( __clang__ )
u64 read_cpu_time_stamp_counter( void )
{
	return __rdtsc();
}
#elif defined( __i386__ )
u64 read_cpu_time_stamp_counter( void )
{
	u64 x;
	__asm__ volatile( ".byte 0x0f, 0x31" : "=A"( x ) );
	return x;
}
#elif defined( __x86_64__ )
u64 read_cpu_time_stamp_counter( void )
{
	u32 hi, lo;
	__asm__ __volatile__( "rdtsc" : "=a"( lo ), "=d"( hi ) );
	return ( zpl_cast( u64 ) lo ) | ( ( zpl_cast( u64 ) hi ) << 32 );
}
#elif defined( __powerpc__ )
u64 read_cpu_time_stamp_counter( void )
{
	u64 result = 0;
	u32 upper, lower, tmp;
	__asm__ volatile(
	"0:                   \n"
	"\tmftbu   %0         \n"
	"\tmftb    %1         \n"
	"\tmftbu   %2         \n"
	"\tcmpw    %2,%0      \n"
	"\tbne     0b         \n"
	: "=r"( upper ), "=r"( lower ), "=r"( tmp )
	);
	result = upper;
	result = result << 32;
	result = result | lower;

	return result;
}
#elif defined( GEN_SYSTEM_EMSCRIPTEN )
u64 read_cpu_time_stamp_counter( void )
{
	return ( u64 )( emscripten_get_now() * 1e+6 );
}
#elif defined( GEN_CPU_ARM ) && ! defined( GEN_COMPILER_TINYC )
u64 read_cpu_time_stamp_counter( void )
{
#if defined( __aarch64__ )
	int64_t r = 0;
	asm volatile( "mrs %0, cntvct_el0" : "=r"( r ) );
#elif ( __ARM_ARCH >= 6 )
	uint32_t r = 0;
	uint32_t pmccntr;
	uint32_t pmuseren;
	uint32_t pmcntenset;

	// Read the user mode perf monitor counter access permissions.
	asm volatile( "mrc p15, 0, %0, c9, c14, 0" : "=r"( pmuseren ) );
	if ( pmuseren & 1 )
	{    // Allows reading perfmon counters for user mode code.
		asm volatile( "mrc p15, 0, %0, c9, c12, 1" : "=r"( pmcntenset ) );
		if ( pmcntenset & 0x80000000ul )
		{    // Is it counting?
			asm volatile( "mrc p15, 0, %0, c9, c13, 0" : "=r"( pmccntr ) );
			// The counter is set up to count every 64th cycle
			return ( ( int64_t )pmccntr ) * 64;    // Should optimize to << 6
		}
	}
#else
#error "No suitable method for read_cpu_time_stamp_counter for this cpu type"
#endif

	return r;
}
#else
u64 read_cpu_time_stamp_counter( void )
{
	GEN_PANIC( "read_cpu_time_stamp_counter is not supported on this particular setup" );
	return -0;
}
#endif

#if defined( GEN_SYSTEM_WINDOWS ) || defined( GEN_SYSTEM_CYGWIN )

u64 time_rel_ms( void )
{
	local_persist LARGE_INTEGER win32_perf_count_freq = {};
	u64                         result;
	LARGE_INTEGER               counter;
	local_persist LARGE_INTEGER win32_perf_counter = {};
	if ( ! win32_perf_count_freq.QuadPart )
	{
		QueryPerformanceFrequency( &win32_perf_count_freq );
		GEN_ASSERT( win32_perf_count_freq.QuadPart != 0 );
		QueryPerformanceCounter( &win32_perf_counter );
	}

	QueryPerformanceCounter( &counter );

	result = ( counter.QuadPart - win32_perf_counter.QuadPart ) * 1000 / ( win32_perf_count_freq.QuadPart );
	return result;
}

#else

#if defined( GEN_SYSTEM_LINUX ) || defined( GEN_SYSTEM_FREEBSD ) || defined( GEN_SYSTEM_OPENBSD ) || defined( GEN_SYSTEM_EMSCRIPTEN )
u64 _unix_gettime( void )
{
	struct timespec t;
	u64             result;

	clock_gettime( 1 /*CLOCK_MONOTONIC*/, &t );
	result = 1000 * t.tv_sec + 1.0e-6 * t.tv_nsec;
	return result;
}
#endif

u64 time_rel_ms( void )
{
#if defined( GEN_SYSTEM_OSX )
	u64 result;

	local_persist u64 timebase  = 0;
	local_persist u64 timestart = 0;

	if ( ! timestart )
	{
		mach_timebase_info_data_t tb = { 0 };
		mach_timebase_info( &tb );
		timebase   = tb.numer;
		timebase  /= tb.denom;
		timestart  = mach_absolute_time();
	}

	// NOTE: mach_absolute_time() returns things in nanoseconds
	result = 1.0e-6 * ( mach_absolute_time() - timestart ) * timebase;
	return result;
#else
	local_persist u64 unix_timestart = 0.0;

	if ( ! unix_timestart )
	{
		unix_timestart = _unix_gettime();
	}

	u64 now = _unix_gettime();

	return ( now - unix_timestart );
#endif
}
#endif

f64 time_rel( void )
{
	return ( f64 )( time_rel_ms() * 1e-3 );
}
#endif

#pragma endregion Timing

#pragma region Parsing

#pragma region ADT

#define _adt_fprintf( s_, fmt_, ... )                      \
	do                                                     \
	{                                                      \
		if ( str_fmt_file( s_, fmt_, ##__VA_ARGS__ ) < 0 ) \
			return EADT_ERROR_OUT_OF_MEMORY;               \
	} while ( 0 )

u8 adt_make_branch( ADT_Node* node, AllocatorInfo backing, char const* name, b32 is_array )
{
	ADT_Type type = EADT_TYPE_OBJECT;
	if ( is_array )
		type = EADT_TYPE_ARRAY;

	ADT_Node* parent = node->parent;
	zero_item( node );

	node->type   = type;
	node->name   = name;
	node->parent = parent;
	node->nodes  = Array< ADT_Node >::init( backing );

	if ( ! node->nodes )
		return EADT_ERROR_OUT_OF_MEMORY;

	return 0;
}

u8 adt_destroy_branch( ADT_Node* node )
{
	GEN_ASSERT_NOT_NULL( node );
	if ( ( node->type == EADT_TYPE_OBJECT || node->type == EADT_TYPE_ARRAY ) && node->nodes )
	{
		for ( sw i = 0; i < node->nodes.num(); ++i )
		{
			adt_destroy_branch( node->nodes + i );
		}

		node->nodes.free();
	}
	return 0;
}

u8 adt_make_leaf( ADT_Node* node, char const* name, ADT_Type type )
{
	GEN_ASSERT( type != EADT_TYPE_OBJECT && type != EADT_TYPE_ARRAY );

	ADT_Node* parent = node->parent;
	zero_item( node );

	node->type   = type;
	node->name   = name;
	node->parent = parent;
	return 0;
}

ADT_Node* adt_find( ADT_Node* node, char const* name, b32 deep_search )
{
	if ( node->type != EADT_TYPE_OBJECT )
	{
		return NULL;
	}

	for ( sw i = 0; i < node->nodes.num(); i++ )
	{
		if ( ! str_compare( node->nodes[ i ].name, name ) )
		{
			return ( node->nodes + i );
		}
	}

	if ( deep_search )
	{
		for ( sw i = 0; i < node->nodes.num(); i++ )
		{
			ADT_Node* res = adt_find( node->nodes + i, name, deep_search );

			if ( res != NULL )
				return res;
		}
	}

	return NULL;
}

internal ADT_Node* _adt_get_value( ADT_Node* node, char const* value )
{
	switch ( node->type )
	{
		case EADT_TYPE_MULTISTRING :
		case EADT_TYPE_STRING :
		{
			if ( node->string && ! str_compare( node->string, value ) )
			{
				return node;
			}
		}
		break;
		case EADT_TYPE_INTEGER :
		case EADT_TYPE_REAL :
		{
			char     back[ 4096 ] = { 0 };
			FileInfo tmp;

			/* allocate a file descriptor for a memory-mapped number to string conversion, input source buffer is not cloned, however. */
			file_stream_open( &tmp, heap(), ( u8* )back, size_of( back ), EFileStream_WRITABLE );
			adt_print_number( &tmp, node );

			sw  fsize = 0;
			u8* buf   = file_stream_buf( &tmp, &fsize );

			if ( ! str_compare( ( char const* )buf, value ) )
			{
				file_close( &tmp );
				return node;
			}

			file_close( &tmp );
		}
		break;
		default :
			break; /* node doesn't support value based lookup */
	}

	return NULL;
}

internal ADT_Node* _adt_get_field( ADT_Node* node, char* name, char* value )
{
	for ( sw i = 0; i < node->nodes.num(); i++ )
	{
		if ( ! str_compare( node->nodes[ i ].name, name ) )
		{
			ADT_Node* child = &node->nodes[ i ];
			if ( _adt_get_value( child, value ) )
			{
				return node; /* this object does contain a field of a specified value! */
			}
		}
	}

	return NULL;
}

ADT_Node* adt_query( ADT_Node* node, char const* uri )
{
	GEN_ASSERT_NOT_NULL( uri );

	if ( *uri == '/' )
	{
		uri++;
	}

	if ( *uri == 0 )
	{
		return node;
	}

	if ( ! node || ( node->type != EADT_TYPE_OBJECT && node->type != EADT_TYPE_ARRAY ) )
	{
		return NULL;
	}

#if defined EADT_URI_DEBUG || 0
	str_fmt_out( "uri: %s\n", uri );
#endif

	char *    p = ( char* )uri, *b = p, *e = p;
	ADT_Node* found_node = NULL;

	b                    = p;
	p = e     = ( char* )str_skip( p, '/' );
	char* buf = str_fmt_buf( "%.*s", ( int )( e - b ), b );

	/* handle field value lookup */
	if ( *b == '[' )
	{
		char *l_p = buf + 1, *l_b = l_p, *l_e = l_p, *l_b2 = l_p, *l_e2 = l_p;
		l_e  = ( char* )str_skip( l_p, '=' );
		l_e2 = ( char* )str_skip( l_p, ']' );

		if ( ( ! *l_e && node->type != EADT_TYPE_ARRAY ) || ! *l_e2 )
		{
			GEN_ASSERT_MSG( 0, "Invalid field value lookup" );
			return NULL;
		}

		*l_e2 = 0;

		/* [field=value] */
		if ( *l_e )
		{
			*l_e = 0;
			l_b2 = l_e + 1;

			/* run a value comparison against our own fields */
			if ( node->type == EADT_TYPE_OBJECT )
			{
				found_node = _adt_get_field( node, l_b, l_b2 );
			}

			/* run a value comparison against any child that is an object node */
			else if ( node->type == EADT_TYPE_ARRAY )
			{
				for ( sw i = 0; i < node->nodes.num(); i++ )
				{
					ADT_Node* child = &node->nodes[ i ];
					if ( child->type != EADT_TYPE_OBJECT )
					{
						continue;
					}

					found_node = _adt_get_field( child, l_b, l_b2 );

					if ( found_node )
						break;
				}
			}
		}
		/* [value] */
		else
		{
			for ( sw i = 0; i < node->nodes.num(); i++ )
			{
				ADT_Node* child = &node->nodes[ i ];
				if ( _adt_get_value( child, l_b2 ) )
				{
					found_node = child;
					break; /* we found a matching value in array, ignore the rest of it */
				}
			}
		}

		/* go deeper if uri continues */
		if ( *e )
		{
			return adt_query( found_node, e + 1 );
		}
	}
	/* handle field name lookup */
	else if ( node->type == EADT_TYPE_OBJECT )
	{
		found_node = adt_find( node, buf, false );

		/* go deeper if uri continues */
		if ( *e )
		{
			return adt_query( found_node, e + 1 );
		}
	}
	/* handle array index lookup */
	else
	{
		sw idx = ( sw )str_to_i64( buf, NULL, 10 );
		if ( idx >= 0 && idx < node->nodes.num() )
		{
			found_node = &node->nodes[ idx ];

			/* go deeper if uri continues */
			if ( *e )
			{
				return adt_query( found_node, e + 1 );
			}
		}
	}

	return found_node;
}

ADT_Node* adt_alloc_at( ADT_Node* parent, sw index )
{
	if ( ! parent || ( parent->type != EADT_TYPE_OBJECT && parent->type != EADT_TYPE_ARRAY ) )
	{
		return NULL;
	}

	if ( ! parent->nodes )
		return NULL;

	if ( index < 0 || index > parent->nodes.num() )
		return NULL;

	ADT_Node o = { 0 };
	o.parent   = parent;
	if ( ! parent->nodes.append_at( o, index ) )
		return NULL;

	return parent->nodes + index;
}

ADT_Node* adt_alloc( ADT_Node* parent )
{
	if ( ! parent || ( parent->type != EADT_TYPE_OBJECT && parent->type != EADT_TYPE_ARRAY ) )
	{
		return NULL;
	}

	if ( ! parent->nodes )
		return NULL;

	return adt_alloc_at( parent, parent->nodes.num() );
}

b8 adt_set_obj( ADT_Node* obj, char const* name, AllocatorInfo backing )
{
	return adt_make_branch( obj, backing, name, 0 );
}

b8 adt_set_arr( ADT_Node* obj, char const* name, AllocatorInfo backing )
{
	return adt_make_branch( obj, backing, name, 1 );
}

b8 adt_set_str( ADT_Node* obj, char const* name, char const* value )
{
	adt_make_leaf( obj, name, EADT_TYPE_STRING );
	obj->string = value;
	return true;
}

b8 adt_set_flt( ADT_Node* obj, char const* name, f64 value )
{
	adt_make_leaf( obj, name, EADT_TYPE_REAL );
	obj->real = value;
	return true;
}

b8 adt_set_int( ADT_Node* obj, char const* name, s64 value )
{
	adt_make_leaf( obj, name, EADT_TYPE_INTEGER );
	obj->integer = value;
	return true;
}

ADT_Node* adt_move_node_at( ADT_Node* node, ADT_Node* new_parent, sw index )
{
	GEN_ASSERT_NOT_NULL( node );
	GEN_ASSERT_NOT_NULL( new_parent );
	ADT_Node* old_parent = node->parent;
	ADT_Node* new_node   = adt_alloc_at( new_parent, index );
	*new_node            = *node;
	new_node->parent     = new_parent;
	if ( old_parent )
	{
		adt_remove_node( node );
	}
	return new_node;
}

ADT_Node* adt_move_node( ADT_Node* node, ADT_Node* new_parent )
{
	GEN_ASSERT_NOT_NULL( node );
	GEN_ASSERT_NOT_NULL( new_parent );
	GEN_ASSERT( new_parent->type == EADT_TYPE_ARRAY || new_parent->type == EADT_TYPE_OBJECT );
	return adt_move_node_at( node, new_parent, new_parent->nodes.num() );
}

void adt_swap_nodes( ADT_Node* node, ADT_Node* other_node )
{
	GEN_ASSERT_NOT_NULL( node );
	GEN_ASSERT_NOT_NULL( other_node );
	ADT_Node* parent                     = node->parent;
	ADT_Node* other_parent               = other_node->parent;
	sw        index                      = ( pointer_diff( parent->nodes, node ) / size_of( ADT_Node ) );
	sw        index2                     = ( pointer_diff( other_parent->nodes, other_node ) / size_of( ADT_Node ) );
	ADT_Node  temp                       = parent->nodes[ index ];
	temp.parent                          = other_parent;
	other_parent->nodes[ index2 ].parent = parent;
	parent->nodes[ index ]               = other_parent->nodes[ index2 ];
	other_parent->nodes[ index2 ]        = temp;
}

void adt_remove_node( ADT_Node* node )
{
	GEN_ASSERT_NOT_NULL( node );
	GEN_ASSERT_NOT_NULL( node->parent );
	ADT_Node* parent = node->parent;
	sw        index  = ( pointer_diff( parent->nodes, node ) / size_of( ADT_Node ) );
	parent->nodes.remove_at( index );
}

ADT_Node* adt_append_obj( ADT_Node* parent, char const* name )
{
	ADT_Node* o = adt_alloc( parent );
	if ( ! o )
		return NULL;
	if ( adt_set_obj( o, name, parent->nodes.get_header()->Allocator ) )
	{
		adt_remove_node( o );
		return NULL;
	}
	return o;
}

ADT_Node* adt_append_arr( ADT_Node* parent, char const* name )
{
	ADT_Node* o = adt_alloc( parent );
	if ( ! o )
		return NULL;
	if ( adt_set_arr( o, name, parent->nodes.get_header()->Allocator ) )
	{
		adt_remove_node( o );
		return NULL;
	}
	return o;
}

ADT_Node* adt_append_str( ADT_Node* parent, char const* name, char const* value )
{
	ADT_Node* o = adt_alloc( parent );
	if ( ! o )
		return NULL;
	adt_set_str( o, name, value );
	return o;
}

ADT_Node* adt_append_flt( ADT_Node* parent, char const* name, f64 value )
{
	ADT_Node* o = adt_alloc( parent );
	if ( ! o )
		return NULL;
	adt_set_flt( o, name, value );
	return o;
}

ADT_Node* adt_append_int( ADT_Node* parent, char const* name, s64 value )
{
	ADT_Node* o = adt_alloc( parent );
	if ( ! o )
		return NULL;
	adt_set_int( o, name, value );
	return o;
}

/* parser helpers */
char* adt_parse_number_strict( ADT_Node* node, char* base_str )
{
	GEN_ASSERT_NOT_NULL( node );
	GEN_ASSERT_NOT_NULL( base_str );
	char *p = base_str, *e = p;

	while ( *e )
		++e;

	while ( *p && ( str_find( "eE.+-", *p ) || char_is_hex_digit( *p ) ) )
	{
		++p;
	}

	if ( p >= e )
	{
		return adt_parse_number( node, base_str );
	}

	return base_str;
}

char* adt_parse_number( ADT_Node* node, char* base_str )
{
	GEN_ASSERT_NOT_NULL( node );
	GEN_ASSERT_NOT_NULL( base_str );
	char *p = base_str, *e = p;

	s32      base         = 0;
	s32      base2        = 0;
	u8       base2_offset = 0;
	s8       exp = 0, orig_exp = 0;
	u8       neg_zero   = 0;
	u8       lead_digit = 0;
	ADT_Type node_type  = EADT_TYPE_UNINITIALISED;
	u8       node_props = 0;

	/* skip false positives and special cases */
	if ( ! ! str_find( "eE", *p ) || ( ! ! str_find( ".+-", *p ) && ! char_is_hex_digit( *( p + 1 ) ) && *( p + 1 ) != '.' ) )
	{
		return ++base_str;
	}

	node_type      = EADT_TYPE_INTEGER;
	neg_zero       = false;

	sw   ib        = 0;
	char buf[ 48 ] = { 0 };

	if ( *e == '+' )
		++e;
	else if ( *e == '-' )
	{
		buf[ ib++ ] = *e++;
	}

	if ( *e == '.' )
	{
		node_type   = EADT_TYPE_REAL;
		node_props  = EADT_PROPS_IS_PARSED_REAL;
		lead_digit  = false;
		buf[ ib++ ] = '0';
		do
		{
			buf[ ib++ ] = *e;
		} while ( char_is_digit( *++e ) );
	}
	else
	{
		if ( ! str_compare( e, "0x", 2 ) || ! str_compare( e, "0X", 2 ) )
		{
			node_props = EADT_PROPS_IS_HEX;
		}

		/* bail if ZPL_ADT_PROPS_IS_HEX is unset but we get 'x' on input */
		if ( char_to_lower( *e ) == 'x' && ( node_props != EADT_PROPS_IS_HEX ) )
		{
			return ++base_str;
		}

		while ( char_is_hex_digit( *e ) || char_to_lower( *e ) == 'x' )
		{
			buf[ ib++ ] = *e++;
		}

		if ( *e == '.' )
		{
			node_type  = EADT_TYPE_REAL;
			lead_digit = true;
			u32 step   = 0;

			do
			{
				buf[ ib++ ] = *e;
				++step;
			} while ( char_is_digit( *++e ) );

			if ( step < 2 )
			{
				buf[ ib++ ] = '0';
			}
		}
	}

	/* check if we have a dot here, this is a false positive (IP address, ...) */
	if ( *e == '.' )
	{
		return ++base_str;
	}

	f32  eb          = 10;
	char expbuf[ 6 ] = { 0 };
	sw   expi        = 0;

	if ( *e && ! ! str_find( "eE", *e ) )
	{
		++e;
		if ( *e == '+' || *e == '-' || char_is_digit( *e ) )
		{
			if ( *e == '-' )
			{
				eb = 0.1f;
			}
			if ( ! char_is_digit( *e ) )
			{
				++e;
			}
			while ( char_is_digit( *e ) )
			{
				expbuf[ expi++ ] = *e++;
			}
		}

		orig_exp = exp = ( u8 )str_to_i64( expbuf, NULL, 10 );
	}

	if ( node_type == EADT_TYPE_INTEGER )
	{
		node->integer = str_to_i64( buf, 0, 0 );
#ifndef GEN_PARSER_DISABLE_ANALYSIS
		/* special case: negative zero */
		if ( node->integer == 0 && buf[ 0 ] == '-' )
		{
			neg_zero = true;
		}
#endif
		while ( orig_exp-- > 0 )
		{
			node->integer *= ( s64 )eb;
		}
	}
	else
	{
		node->real = str_to_f64( buf, 0 );

#ifndef GEN_PARSER_DISABLE_ANALYSIS
		char *q = buf, *base_string = q, *base_string2 = q;
		base_string           = zpl_cast( char* ) str_skip( base_string, '.' );
		*base_string          = '\0';
		base_string2          = base_string + 1;
		char* base_string_off = base_string2;
		while ( *base_string_off++ == '0' )
			base2_offset++;

		base  = ( s32 )str_to_i64( q, 0, 0 );
		base2 = ( s32 )str_to_i64( base_string2, 0, 0 );
		if ( exp )
		{
			exp        = exp * ( ! ( eb == 10.0f ) ? -1 : 1 );
			node_props = EADT_PROPS_IS_EXP;
		}

		/* special case: negative zero */
		if ( base == 0 && buf[ 0 ] == '-' )
		{
			neg_zero = true;
		}
#endif
		while ( orig_exp-- > 0 )
		{
			node->real *= eb;
		}
	}

	node->type  = node_type;
	node->props = node_props;

#ifndef GEN_PARSER_DISABLE_ANALYSIS
	node->base         = base;
	node->base2        = base2;
	node->base2_offset = base2_offset;
	node->exp          = exp;
	node->neg_zero     = neg_zero;
	node->lead_digit   = lead_digit;
#else
	unused( base );
	unused( base2 );
	unused( base2_offset );
	unused( exp );
	unused( neg_zero );
	unused( lead_digit );
#endif
	return e;
}

ADT_Error adt_print_number( FileInfo* file, ADT_Node* node )
{
	GEN_ASSERT_NOT_NULL( file );
	GEN_ASSERT_NOT_NULL( node );
	if ( node->type != EADT_TYPE_INTEGER && node->type != EADT_TYPE_REAL )
	{
		return EADT_ERROR_INVALID_TYPE;
	}

#ifndef GEN_PARSER_DISABLE_ANALYSIS
	if ( node->neg_zero )
	{
		_adt_fprintf( file, "-" );
	}
#endif

	switch ( node->type )
	{
		case EADT_TYPE_INTEGER :
		{
			if ( node->props == EADT_PROPS_IS_HEX )
			{
				_adt_fprintf( file, "0x%llx", ( long long )node->integer );
			}
			else
			{
				_adt_fprintf( file, "%lld", ( long long )node->integer );
			}
		}
		break;

		case EADT_TYPE_REAL :
		{
			if ( node->props == EADT_PROPS_NAN )
			{
				_adt_fprintf( file, "NaN" );
			}
			else if ( node->props == EADT_PROPS_NAN_NEG )
			{
				_adt_fprintf( file, "-NaN" );
			}
			else if ( node->props == EADT_PROPS_INFINITY )
			{
				_adt_fprintf( file, "Infinity" );
			}
			else if ( node->props == EADT_PROPS_INFINITY_NEG )
			{
				_adt_fprintf( file, "-Infinity" );
			}
			else if ( node->props == EADT_PROPS_TRUE )
			{
				_adt_fprintf( file, "true" );
			}
			else if ( node->props == EADT_PROPS_FALSE )
			{
				_adt_fprintf( file, "false" );
			}
			else if ( node->props == EADT_PROPS_NULL )
			{
				_adt_fprintf( file, "null" );
#ifndef GEN_PARSER_DISABLE_ANALYSIS
			}
			else if ( node->props == EADT_PROPS_IS_EXP )
			{
				_adt_fprintf( file, "%lld.%0*d%llde%lld", ( long long )node->base, node->base2_offset, 0, ( long long )node->base2, ( long long )node->exp );
			}
			else if ( node->props == EADT_PROPS_IS_PARSED_REAL )
			{
				if ( ! node->lead_digit )
					_adt_fprintf( file, ".%0*d%lld", node->base2_offset, 0, ( long long )node->base2 );
				else
					_adt_fprintf( file, "%lld.%0*d%lld", ( long long int )node->base2_offset, 0, ( int )node->base, ( long long )node->base2 );
#endif
			}
			else
			{
				_adt_fprintf( file, "%f", node->real );
			}
		}
		break;
	}

	return EADT_ERROR_NONE;
}

ADT_Error adt_print_string( FileInfo* file, ADT_Node* node, char const* escaped_chars, char const* escape_symbol )
{
	GEN_ASSERT_NOT_NULL( file );
	GEN_ASSERT_NOT_NULL( node );
	GEN_ASSERT_NOT_NULL( escaped_chars );
	if ( node->type != EADT_TYPE_STRING && node->type != EADT_TYPE_MULTISTRING )
	{
		return EADT_ERROR_INVALID_TYPE;
	}

	/* escape string */
	char const *p = node->string, *b = p;

	if ( ! p )
		return EADT_ERROR_NONE;

	do
	{
		p = str_skip_any( p, escaped_chars );
		_adt_fprintf( file, "%.*s", pointer_diff( b, p ), b );
		if ( *p && ! ! str_find( escaped_chars, *p ) )
		{
			_adt_fprintf( file, "%s%c", escape_symbol, *p );
			p++;
		}
		b = p;
	} while ( *p );

	return EADT_ERROR_NONE;
}

ADT_Error adt_str_to_number( ADT_Node* node )
{
	GEN_ASSERT( node );

	if ( node->type == EADT_TYPE_REAL || node->type == EADT_TYPE_INTEGER )
		return EADT_ERROR_ALREADY_CONVERTED; /* this is already converted/parsed */
	if ( node->type != EADT_TYPE_STRING && node->type != EADT_TYPE_MULTISTRING )
	{
		return EADT_ERROR_INVALID_TYPE;
	}

	adt_parse_number( node, ( char* )node->string );

	return EADT_ERROR_NONE;
}

ADT_Error adt_str_to_number_strict( ADT_Node* node )
{
	GEN_ASSERT( node );

	if ( node->type == EADT_TYPE_REAL || node->type == EADT_TYPE_INTEGER )
		return EADT_ERROR_ALREADY_CONVERTED; /* this is already converted/parsed */
	if ( node->type != EADT_TYPE_STRING && node->type != EADT_TYPE_MULTISTRING )
	{
		return EADT_ERROR_INVALID_TYPE;
	}

	adt_parse_number_strict( node, ( char* )node->string );

	return EADT_ERROR_NONE;
}

#undef _adt_fprintf

#pragma endregion ADT

#pragma region CSV

#ifdef GEN_CSV_DEBUG
#define GEN_CSV_ASSERT( msg ) GEN_PANIC( msg )
#else
#define GEN_CSV_ASSERT( msg )
#endif

u8 csv_parse_delimiter( CSV_Object* root, char* text, AllocatorInfo allocator, b32 has_header, char delim )
{
	CSV_Error error = ECSV_Error__NONE;
	GEN_ASSERT_NOT_NULL( root );
	GEN_ASSERT_NOT_NULL( text );
	zero_item( root );

	adt_make_branch( root, allocator, NULL, has_header ? false : true );

	char* currentChar = text;
	char* beginChar;
	char* endChar;

	sw columnIndex      = 0;
	sw totalColumnIndex = 0;

	do
	{
		char delimiter = 0;
		currentChar    = zpl_cast( char* ) str_trim( currentChar, false );

		if ( *currentChar == 0 )
			break;

		ADT_Node rowItem = { 0 };
		rowItem.type     = EADT_TYPE_STRING;

#ifndef GEN_PARSER_DISABLE_ANALYSIS
		rowItem.name_style = EADT_NAME_STYLE_NO_QUOTES;
#endif

		/* handle string literals */
		if ( *currentChar == '"' )
		{
			currentChar    += 1;
			beginChar       = currentChar;
			endChar         = currentChar;
			rowItem.string  = beginChar;
#ifndef GEN_PARSER_DISABLE_ANALYSIS
			rowItem.name_style = EADT_NAME_STYLE_DOUBLE_QUOTE;
#endif
			do
			{
				endChar = zpl_cast( char* ) str_skip( endChar, '"' );

				if ( *endChar && *( endChar + 1 ) == '"' )
				{
					endChar += 2;
				}
				else
					break;
			} while ( *endChar );

			if ( *endChar == 0 )
			{
				GEN_CSV_ASSERT( "unmatched quoted string" );
				error = ECSV_Error__UNEXPECTED_END_OF_INPUT;
				return error;
			}

			*endChar    = 0;
			currentChar = zpl_cast( char* ) str_trim( endChar + 1, true );
			delimiter   = *currentChar;

			/* unescape escaped quotes (so that unescaped text escapes :) */
			{
				char* escapedChar = beginChar;
				do
				{
					if ( *escapedChar == '"' && *( escapedChar + 1 ) == '"' )
					{
						mem_move( escapedChar, escapedChar + 1, str_len( escapedChar ) );
					}
					escapedChar++;
				} while ( *escapedChar );
			}
		}
		else if ( *currentChar == delim )
		{
			delimiter      = *currentChar;
			rowItem.string = "";
		}
		else if ( *currentChar )
		{
			/* regular data */
			beginChar      = currentChar;
			endChar        = currentChar;
			rowItem.string = beginChar;

			do
			{
				endChar++;
			} while ( *endChar && *endChar != delim && *endChar != '\n' );

			if ( *endChar )
			{
				currentChar = zpl_cast( char* ) str_trim( endChar, true );

				while ( char_is_space( *( endChar - 1 ) ) )
				{
					endChar--;
				}

				delimiter = *currentChar;
				*endChar  = 0;
			}
			else
			{
				delimiter   = 0;
				currentChar = endChar;
			}

			/* check if number and process if so */
			b32   skip_number = false;
			char* num_p       = beginChar;

			// We only consider hexadecimal values if they start with 0x
			if ( str_len( num_p ) > 2 && num_p[ 0 ] == '0' && ( num_p[ 1 ] == 'x' || num_p[ 1 ] == 'X' ) )
			{
				num_p += 2;    // skip '0x' prefix
				do
				{
					if ( ! char_is_hex_digit( *num_p ) )
					{
						skip_number = true;
						break;
					}
				} while ( *num_p++ );
			}
			else
			{
				skip_number = true;
			}

			if ( ! skip_number )
			{
				adt_str_to_number( &rowItem );
			}
		}

		if ( columnIndex >= root->nodes.num() )
		{
			adt_append_arr( root, NULL );
		}

		root->nodes[ columnIndex ].nodes.append( rowItem );

		if ( delimiter == delim )
		{
			columnIndex++;
			currentChar++;
		}
		else if ( delimiter == '\n' || delimiter == 0 )
		{
			/* check if number of rows is not mismatched */
			if ( totalColumnIndex < columnIndex )
				totalColumnIndex = columnIndex;

			else if ( totalColumnIndex != columnIndex )
			{
				GEN_CSV_ASSERT( "mismatched rows" );
				error = ECSV_Error__MISMATCHED_ROWS;
				return error;
			}

			columnIndex = 0;

			if ( delimiter != 0 )
				currentChar++;
		}
	} while ( *currentChar );

	if ( root->nodes.num() == 0 )
	{
		GEN_CSV_ASSERT( "unexpected end of input. stream is empty." );
		error = ECSV_Error__UNEXPECTED_END_OF_INPUT;
		return error;
	}

	/* consider first row as a header. */
	if ( has_header )
	{
		for ( sw i = 0; i < root->nodes.num(); i++ )
		{
			CSV_Object* col = root->nodes + i;
			CSV_Object* hdr = col->nodes;
			col->name       = hdr->string;
			col->nodes.remove_at( 0 );
		}
	}

	return error;
}

void csv_free( CSV_Object* obj )
{
	adt_destroy_branch( obj );
}

void _csv_write_record( FileInfo* file, CSV_Object* node )
{
	switch ( node->type )
	{
		case EADT_TYPE_STRING :
		{
#ifndef GEN_PARSER_DISABLE_ANALYSIS
			switch ( node->name_style )
			{
				case EADT_NAME_STYLE_DOUBLE_QUOTE :
				{
					str_fmt_file( file, "\"" );
					adt_print_string( file, node, "\"", "\"" );
					str_fmt_file( file, "\"" );
				}
				break;

				case EADT_NAME_STYLE_NO_QUOTES :
				{
#endif
					str_fmt_file( file, "%s", node->string );
#ifndef GEN_PARSER_DISABLE_ANALYSIS
				}
				break;
			}
#endif
		}
		break;

		case EADT_TYPE_REAL :
		case EADT_TYPE_INTEGER :
		{
			adt_print_number( file, node );
		}
		break;
	}
}

void _csv_write_header( FileInfo* file, CSV_Object* header )
{
	CSV_Object temp = *header;
	temp.string     = temp.name;
	temp.type       = EADT_TYPE_STRING;
	_csv_write_record( file, &temp );
}

void csv_write_delimiter( FileInfo* file, CSV_Object* obj, char delimiter )
{
	GEN_ASSERT_NOT_NULL( file );
	GEN_ASSERT_NOT_NULL( obj );
	GEN_ASSERT( obj->nodes );
	sw cols = obj->nodes.num();
	if ( cols == 0 )
		return;

	sw rows = obj->nodes[ 0 ].nodes.num();
	if ( rows == 0 )
		return;

	b32 has_headers = obj->nodes[ 0 ].name != NULL;

	if ( has_headers )
	{
		for ( sw i = 0; i < cols; i++ )
		{
			_csv_write_header( file, &obj->nodes[ i ] );
			if ( i + 1 != cols )
			{
				str_fmt_file( file, "%c", delimiter );
			}
		}
		str_fmt_file( file, "\n" );
	}

	for ( sw r = 0; r < rows; r++ )
	{
		for ( sw i = 0; i < cols; i++ )
		{
			_csv_write_record( file, &obj->nodes[ i ].nodes[ r ] );
			if ( i + 1 != cols )
			{
				str_fmt_file( file, "%c", delimiter );
			}
		}
		str_fmt_file( file, "\n" );
	}
}

String csv_write_string_delimiter( AllocatorInfo a, CSV_Object* obj, char delimiter )
{
	FileInfo tmp;
	file_stream_new( &tmp, a );
	csv_write_delimiter( &tmp, obj, delimiter );
	sw     fsize;
	u8*    buf    = file_stream_buf( &tmp, &fsize );
	String output = String::make_length( a, ( char* )buf, fsize );
	file_close( &tmp );
	return output;
}

#pragma endregion CSV

#pragma endregion Parsing

GEN_NS_END

// GEN_ROLL_OWN_DEPENDENCIES
#endif

GEN_NS_BEGIN

#pragma region StaticData

// TODO : Convert global allocation strategy to use a slab allocation strategy.
global AllocatorInfo GlobalAllocator;
global Array< Arena > Global_AllocatorBuckets;

global Array< Pool > CodePools     = { nullptr };
global Array< Arena > StringArenas = { nullptr };

global StringTable StringCache;

global Arena LexArena;

global AllocatorInfo Allocator_DataArrays  = heap();
global AllocatorInfo Allocator_CodePool    = heap();
global AllocatorInfo Allocator_Lexer       = heap();
global AllocatorInfo Allocator_StringArena = heap();
global AllocatorInfo Allocator_StringTable = heap();
global AllocatorInfo Allocator_TypeTable   = heap();

#pragma endregion StaticData

#pragma region Constants

global Code access_public;
global Code access_protected;
global Code access_private;

global CodeAttributes attrib_api_export;
global CodeAttributes attrib_api_import;

global Code module_global_fragment;
global Code module_private_fragment;

global Code fmt_newline;

global CodeParam param_varadic;

global CodePragma pragma_once;

global CodePreprocessCond preprocess_else;
global CodePreprocessCond preprocess_endif;

global CodeSpecifiers spec_const;
global CodeSpecifiers spec_consteval;
global CodeSpecifiers spec_constexpr;
global CodeSpecifiers spec_constinit;
global CodeSpecifiers spec_extern_linkage;
global CodeSpecifiers spec_final;
global CodeSpecifiers spec_forceinline;
global CodeSpecifiers spec_global;
global CodeSpecifiers spec_inline;
global CodeSpecifiers spec_internal_linkage;
global CodeSpecifiers spec_local_persist;
global CodeSpecifiers spec_mutable;
global CodeSpecifiers spec_noexcept;
global CodeSpecifiers spec_neverinline;
global CodeSpecifiers spec_override;
global CodeSpecifiers spec_ptr;
global CodeSpecifiers spec_pure;
global CodeSpecifiers spec_ref;
global CodeSpecifiers spec_register;
global CodeSpecifiers spec_rvalue;
global CodeSpecifiers spec_static_member;
global CodeSpecifiers spec_thread_local;
global CodeSpecifiers spec_virtual;
global CodeSpecifiers spec_volatile;

global CodeType t_empty;
global CodeType t_auto;
global CodeType t_void;
global CodeType t_int;
global CodeType t_bool;
global CodeType t_char;
global CodeType t_wchar_t;
global CodeType t_class;
global CodeType t_typename;

#ifdef GEN_DEFINE_LIBRARY_CODE_CONSTANTS
global CodeType t_b32;

global CodeType t_s8;
global CodeType t_s16;
global CodeType t_s32;
global CodeType t_s64;

global CodeType t_u8;
global CodeType t_u16;
global CodeType t_u32;
global CodeType t_u64;

global CodeType t_sw;
global CodeType t_uw;

global CodeType t_f32;
global CodeType t_f64;
#endif

#pragma endregion Constants
#pragma region    AST

#define GEN_AST_BODY_CLASS_UNALLOWED_TYPES \
	case PlatformAttributes :              \
	case Class_Body :                      \
	case Enum_Body :                       \
	case Extern_Linkage :                  \
	case Function_Body :                   \
	case Function_Fwd :                    \
	case Global_Body :                     \
	case Namespace :                       \
	case Namespace_Body :                  \
	case Operator :                        \
	case Operator_Fwd :                    \
	case Parameters :                      \
	case Specifiers :                      \
	case Struct_Body :                     \
	case Typename :
#define GEN_AST_BODY_STRUCT_UNALLOWED_TYPES GEN_AST_BODY_CLASS_UNALLOWED_TYPES

#define GEN_AST_BODY_FUNCTION_UNALLOWED_TYPES \
	case Access_Public :                      \
	case Access_Protected :                   \
	case Access_Private :                     \
	case PlatformAttributes :                 \
	case Class_Body :                         \
	case Enum_Body :                          \
	case Extern_Linkage :                     \
	case Friend :                             \
	case Function_Body :                      \
	case Function_Fwd :                       \
	case Global_Body :                        \
	case Namespace :                          \
	case Namespace_Body :                     \
	case Operator :                           \
	case Operator_Fwd :                       \
	case Operator_Member :                    \
	case Operator_Member_Fwd :                \
	case Parameters :                         \
	case Specifiers :                         \
	case Struct_Body :                        \
	case Typename :

#define GEN_AST_BODY_GLOBAL_UNALLOWED_TYPES \
	case Access_Public :                    \
	case Access_Protected :                 \
	case Access_Private :                   \
	case PlatformAttributes :               \
	case Class_Body :                       \
	case Enum_Body :                        \
	case Execution :                        \
	case Friend :                           \
	case Function_Body :                    \
	case Namespace_Body :                   \
	case Operator_Member :                  \
	case Operator_Member_Fwd :              \
	case Parameters :                       \
	case Specifiers :                       \
	case Struct_Body :                      \
	case Typename :
#define GEN_AST_BODY_EXPORT_UNALLOWED_TYPES         GEN_AST_BODY_GLOBAL_UNALLOWED_TYPES
#define GEN_AST_BODY_EXTERN_LINKAGE_UNALLOWED_TYPES GEN_AST_BODY_GLOBAL_UNALLOWED_TYPES

#define GEN_AST_BODY_NAMESPACE_UNALLOWED_TYPES \
	case Access_Public :                       \
	case Access_Protected :                    \
	case Access_Private :                      \
	case PlatformAttributes :                  \
	case Class_Body :                          \
	case Enum_Body :                           \
	case Execution :                           \
	case Friend :                              \
	case Function_Body :                       \
	case Namespace_Body :                      \
	case Operator_Member :                     \
	case Operator_Member_Fwd :                 \
	case Parameters :                          \
	case Specifiers :                          \
	case Struct_Body :                         \
	case Typename :

Code Code::Global;
Code Code::Invalid;

// This serializes all the data-members in a "debug" format, where each member is printed with its associated value.
char const* AST::debug_str()
{
	String result = String::make_reserve( GlobalAllocator, kilobytes( 1 ) );

	if ( Parent )
		result.append_fmt( "\n\tParent       : %S %S", Parent->type_str(), Name ? Name : "" );
	else
		result.append_fmt( "\n\tParent       : %S", "Null" );

	result.append_fmt( "\n\tName         : %S", Name ? Name : "Null" );
	result.append_fmt( "\n\tType         : %S", type_str() );
	result.append_fmt( "\n\tModule Flags : %S", to_str( ModuleFlags ) );

	switch ( Type )
	{
		using namespace ECode;

		case Invalid :
		case NewLine :
		case Access_Private :
		case Access_Protected :
		case Access_Public :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			break;

		case Untyped :
		case Execution :
		case Comment :
		case PlatformAttributes :
		case Preprocess_Define :
		case Preprocess_Include :
		case Preprocess_Pragma :
		case Preprocess_If :
		case Preprocess_ElIf :
		case Preprocess_Else :
		case Preprocess_IfDef :
		case Preprocess_IfNotDef :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tContent: %S", Content );
			break;

		case Class :
		case Struct :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tInlineCmd   : %S", InlineCmt ? InlineCmt->Content : "Null" );
			result.append_fmt( "\n\tAttributes  : %S", Attributes ? Attributes->to_string() : "Null" );
			result.append_fmt( "\n\tParentAccess: %s", ParentType ? to_str( ParentAccess ) : "No Parent" );
			result.append_fmt( "\n\tParentType  : %s", ParentType ? ParentType->type_str() : "Null" );
			result.append_fmt( "\n\tBody        : %S", Body ? Body->debug_str() : "Null" );
			break;

		case Class_Fwd :
		case Struct_Fwd :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tInlineCmd   : %S", InlineCmt ? InlineCmt->Content : "Null" );
			result.append_fmt( "\n\tAttributes  : %S", Attributes ? Attributes->to_string() : "Null" );
			result.append_fmt( "\n\tParentAccess: %s", ParentType ? to_str( ParentAccess ) : "No Parent" );
			result.append_fmt( "\n\tParentType  : %s", ParentType ? ParentType->type_str() : "Null" );
			break;

		case Constructor :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tInlineCmt      : %S", InlineCmt ? InlineCmt->Content : "Null" );
			result.append_fmt( "\n\tSpecs          : %S", Specs ? Specs->to_string() : "Null" );
			result.append_fmt( "\n\tInitializerList: %S", InitializerList ? InitializerList->to_string() : "Null" );
			result.append_fmt( "\n\tParams         : %S", Params ? Params->to_string() : "Null" );
			result.append_fmt( "\n\tBody           : %S", Body ? Body->debug_str() : "Null" );
			break;

		case Constructor_Fwd :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tInlineCmt      : %S", InlineCmt ? InlineCmt->Content : "Null" );
			result.append_fmt( "\n\tSpecs          : %S", Specs ? Specs->to_string() : "Null" );
			result.append_fmt( "\n\tInitializerList: %S", InitializerList ? InitializerList->to_string() : "Null" );
			result.append_fmt( "\n\tParams         : %S", Params ? Params->to_string() : "Null" );
			break;

		case Destructor :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tInlineCmt      : %S", InlineCmt ? InlineCmt->Content : "Null" );
			result.append_fmt( "\n\tSpecs          : %S", Specs ? Specs->to_string() : "Null" );
			result.append_fmt( "\n\tBody           : %S", Body ? Body->debug_str() : "Null" );
			break;

		case Destructor_Fwd :
			break;

		case Enum :
		case Enum_Class :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tInlineCmt       : %S", InlineCmt ? InlineCmt->Content : "Null" );
			result.append_fmt( "\n\tAttributes      : %S", Attributes ? Attributes->to_string() : "Null" );
			result.append_fmt( "\n\tUnderlying Type : %S", UnderlyingType ? UnderlyingType->to_string() : "Null" );
			result.append_fmt( "\n\tBody            : %S", Body ? Body->debug_str() : "Null" );
			break;

		case Enum_Fwd :
		case Enum_Class_Fwd :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tInlineCmt       : %S", InlineCmt ? InlineCmt->Content : "Null" );
			result.append_fmt( "\n\tAttributes      : %S", Attributes ? Attributes->to_string() : "Null" );
			result.append_fmt( "\n\tUnderlying Type : %S", UnderlyingType ? UnderlyingType->to_string() : "Null" );
			break;

		case Extern_Linkage :
		case Namespace :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tBody: %S", Body ? Body->debug_str() : "Null" );
			break;

		case Friend :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tInlineCmt  : %S", InlineCmt ? InlineCmt->Content : "Null" );
			result.append_fmt( "\n\tDeclaration: %S", Declaration ? Declaration->to_string() : "Null" );
			break;

		case Function :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tInlineCmt : %S", InlineCmt ? InlineCmt->Content : "Null" );
			result.append_fmt( "\n\tAttributes: %S", Attributes ? Attributes->to_string() : "Null" );
			result.append_fmt( "\n\tSpecs     : %S", Specs ? Specs->to_string() : "Null" );
			result.append_fmt( "\n\tReturnType: %S", ReturnType ? ReturnType->to_string() : "Null" );
			result.append_fmt( "\n\tParams    : %S", Params ? Params->to_string() : "Null" );
			result.append_fmt( "\n\tBody      : %S", Body ? Body->debug_str() : "Null" );
			break;

		case Function_Fwd :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tInlineCmt : %S", InlineCmt ? InlineCmt->Content : "Null" );
			result.append_fmt( "\n\tAttributes: %S", Attributes ? Attributes->to_string() : "Null" );
			result.append_fmt( "\n\tSpecs     : %S", Specs ? Specs->to_string() : "Null" );
			result.append_fmt( "\n\tReturnType: %S", ReturnType ? ReturnType->to_string() : "Null" );
			result.append_fmt( "\n\tParams    : %S", Params ? Params->to_string() : "Null" );
			break;

		case Module :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			break;

		case Operator :
		case Operator_Member :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tInlineCmt : %S", InlineCmt ? InlineCmt->Content : "Null" );
			result.append_fmt( "\n\tAttributes: %S", Attributes ? Attributes->to_string() : "Null" );
			result.append_fmt( "\n\tSpecs     : %S", Specs ? Specs->to_string() : "Null" );
			result.append_fmt( "\n\tReturnType: %S", ReturnType ? ReturnType->to_string() : "Null" );
			result.append_fmt( "\n\tParams    : %S", Params ? Params->to_string() : "Null" );
			result.append_fmt( "\n\tBody      : %S", Body ? Body->debug_str() : "Null" );
			result.append_fmt( "\n\tOp        : %S", to_str( Op ) );
			break;

		case Operator_Fwd :
		case Operator_Member_Fwd :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tInlineCmt : %S", InlineCmt ? InlineCmt->Content : "Null" );
			result.append_fmt( "\n\tAttributes: %S", Attributes ? Attributes->to_string() : "Null" );
			result.append_fmt( "\n\tSpecs     : %S", Specs ? Specs->to_string() : "Null" );
			result.append_fmt( "\n\tReturnType: %S", ReturnType ? ReturnType->to_string() : "Null" );
			result.append_fmt( "\n\tParams    : %S", Params ? Params->to_string() : "Null" );
			result.append_fmt( "\n\tOp        : %S", to_str( Op ) );
			break;

		case Operator_Cast :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tInlineCmt : %S", InlineCmt ? InlineCmt->Content : "Null" );
			result.append_fmt( "\n\tSpecs     : %S", Specs ? Specs->to_string() : "Null" );
			result.append_fmt( "\n\tValueType : %S", ValueType ? ValueType->to_string() : "Null" );
			result.append_fmt( "\n\tBody      : %S", Body ? Body->debug_str() : "Null" );
			break;

		case Operator_Cast_Fwd :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tInlineCmt : %S", InlineCmt ? InlineCmt->Content : "Null" );
			result.append_fmt( "\n\tSpecs     : %S", Specs ? Specs->to_string() : "Null" );
			result.append_fmt( "\n\tValueType : %S", ValueType ? ValueType->to_string() : "Null" );
			break;

		case Parameters :
			result.append_fmt( "\n\tNumEntries: %d", NumEntries );
			result.append_fmt( "\n\tLast      : %S", Last->Name );
			result.append_fmt( "\n\tNext      : %S", Next->Name );
			result.append_fmt( "\n\tValueType : %S", ValueType ? ValueType->to_string() : "Null" );
			result.append_fmt( "\n\tValue     : %S", Value ? Value->to_string() : "Null" );
			break;

		case Specifiers :
		{
			result.append_fmt( "\n\tNumEntries: %d", NumEntries );
			result.append( "\n\tArrSpecs: " );

			s32 idx  = 0;
			s32 left = NumEntries;
			while ( left-- )
			{
				StrC spec = ESpecifier::to_str( ArrSpecs[ idx ] );
				result.append_fmt( "%.*s, ", spec.Len, spec.Ptr );
				idx++;
			}
			result.append_fmt( "\n\tNextSpecs: %S", NextSpecs ? NextSpecs->debug_str() : "Null" );
		}
		break;

		case Template :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tParams     : %S", Params ? Params->to_string() : "Null" );
			result.append_fmt( "\n\tDeclaration: %S", Declaration ? Declaration->to_string() : "Null" );
			break;

		case Typedef :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tInlineCmt     : %S", InlineCmt ? InlineCmt->Content : "Null" );
			result.append_fmt( "\n\tUnderlyingType: %S", UnderlyingType ? UnderlyingType->to_string() : "Null" );
			break;

		case Typename :
			result.append_fmt( "\n\tAttributes     : %S", Attributes ? Attributes->to_string() : "Null" );
			result.append_fmt( "\n\tSpecs          : %S", Specs ? Specs->to_string() : "Null" );
			result.append_fmt( "\n\tReturnType     : %S", ReturnType ? ReturnType->to_string() : "Null" );
			result.append_fmt( "\n\tParams         : %S", Params ? Params->to_string() : "Null" );
			result.append_fmt( "\n\tArrExpr        : %S", ArrExpr ? ArrExpr->to_string() : "Null" );
			break;

		case Union :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tAttributes: %S", Attributes ? Attributes->to_string() : "Null" );
			result.append_fmt( "\n\tBody      : %S", Body ? Body->debug_str() : "Null" );
			break;

		case Using :
			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tInlineCmt     : %S", InlineCmt ? InlineCmt->Content : "Null" );
			result.append_fmt( "\n\tAttributes    : %S", Attributes ? Attributes->to_string() : "Null" );
			result.append_fmt( "\n\tUnderlyingType: %S", UnderlyingType ? UnderlyingType->to_string() : "Null" );
			break;

		case Variable :

			if ( Parent && Parent->Type == Variable )
			{
				// Its a NextVar
				result.append_fmt( "\n\tSpecs       : %S", Specs ? Specs->to_string() : "Null" );
				result.append_fmt( "\n\tValue       : %S", Value ? Value->to_string() : "Null" );
				result.append_fmt( "\n\tBitfieldSize: %S", BitfieldSize ? BitfieldSize->to_string() : "Null" );
				result.append_fmt( "\n\tNextVar     : %S", NextVar ? NextVar->debug_str() : "Null" );
				break;
			}

			if ( Prev )
				result.append_fmt( "\n\tPrev: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );
			if ( Next )
				result.append_fmt( "\n\tNext: %S %S", Prev->type_str(), Prev->Name ? Prev->Name : "Null" );

			result.append_fmt( "\n\tInlineCmt   : %S", InlineCmt ? InlineCmt->Content : "Null" );
			result.append_fmt( "\n\tAttributes  : %S", Attributes ? Attributes->to_string() : "Null" );
			result.append_fmt( "\n\tSpecs       : %S", Specs ? Specs->to_string() : "Null" );
			result.append_fmt( "\n\tValueType   : %S", ValueType ? ValueType->to_string() : "Null" );
			result.append_fmt( "\n\tBitfieldSize: %S", BitfieldSize ? BitfieldSize->to_string() : "Null" );
			result.append_fmt( "\n\tValue       : %S", Value ? Value->to_string() : "Null" );
			result.append_fmt( "\n\tNextVar     : %S", NextVar ? NextVar->debug_str() : "Null" );
			break;
	}

	return result;
}

AST* AST::duplicate()
{
	using namespace ECode;

	AST* result = make_code().ast;

	mem_copy( result, this, sizeof( AST ) );

	result->Parent = nullptr;
	return result;
}

String AST::to_string()
{
	local_persist thread_local char SerializationLevel = 0;

	// TODO : Need to refactor so that intermeidate strings are freed conviently.
	String result = String::make( GlobalAllocator, "" );

	switch ( Type )
	{
		using namespace ECode;

		case Invalid :
#ifdef GEN_DONT_ALLOW_INVALID_CODE
			log_failure( "Attempted to serialize invalid code! - %S", Parent ? Parent->debug_str() : Name );
#else
			result.append_fmt( "Invalid Code!" );
#endif
			break;

		case NewLine :
			result.append( "\n" );
			break;

		case Untyped :
		case Execution :
		case Comment :
		case PlatformAttributes :
			result.append( Content );
			break;

		case Access_Private :
		case Access_Protected :
		case Access_Public :
			result.append( Name );
			break;

		case Class :
		{
			if ( bitfield_is_equal( u32, ModuleFlags, ModuleFlag::Export ) )
				result.append( "export " );

			result.append( "class " );

			if ( Attributes )
			{
				result.append_fmt( "%S ", Attributes->to_string() );
			}

			if ( ParentType )
			{
				char const* access_level = to_str( ParentAccess );

				result.append_fmt( "%S : %s %S", Name, access_level, ParentType );

				CodeType interface = ParentType->Next->cast< CodeType >();
				if ( interface )
					result.append( "\n" );

				while ( interface )
				{
					result.append_fmt( ", %S", interface.to_string() );
					interface = interface->Next ? interface->Next->cast< CodeType >() : Code { nullptr };
				}
			}
			else if ( Name )
			{
				result.append( Name );
			}

			if ( InlineCmt )
			{
				result.append_fmt( " // %S", InlineCmt->Content );
			}

			result.append_fmt( "\n{\n%S\n}", Body->to_string() );

			if ( Parent == nullptr || ( Parent->Type != ECode::Typedef && Parent->Type != ECode::Variable ) )
				result.append( ";\n" );
		}
		break;

		case Class_Fwd :
		{
			if ( bitfield_is_equal( u32, ModuleFlags, ModuleFlag::Export ) )
				result.append( "export " );

			if ( Attributes )
				result.append_fmt( "class %S %S", Attributes->to_string(), Name );

			else
				result.append_fmt( "class %S", Name );

			// Check if it can have an end-statement
			if ( Parent == nullptr || ( Parent->Type != ECode::Typedef && Parent->Type != ECode::Variable ) )
			{
				if ( InlineCmt )
					result.append_fmt( "; // %S\n", InlineCmt->Content );
				else
					result.append( ";\n" );
			}
		}
		break;

		case Constructor :
		{
			result.append( Parent->Name );

			if ( Params )
				result.append_fmt( "( %S )", Params->to_string() );
			else
				result.append( "(void)" );

			if ( InitializerList )
				result.append_fmt( " : %S", InitializerList->to_string() );

			if ( InlineCmt )
				result.append_fmt( " // %S", InlineCmt->Content );

			result.append_fmt( "\n{\n%S\n}\n", Body->to_string() );
		}
		break;

		case Constructor_Fwd :
		{
			result.append( Parent->Name );

			if ( Params )
				result.append_fmt( "( %S )", Params->to_string() );
			else
			{
				if ( InlineCmt )
					result.append_fmt( "(void); // %S\n", InlineCmt->Content );
				else
					result.append( "(void);\n" );
			}
		}
		break;

		case Destructor :
		{
			if ( Specs )
			{
				CodeSpecifiers specs = Specs->cast< CodeSpecifiers >();

				if ( specs.has( ESpecifier::Virtual ) )
					result.append_fmt( "virtual ~%S()", Parent->Name );
				else
					result.append_fmt( "~%S()", Parent->Name );
			}
			else
				result.append_fmt( "~%S()", Parent->Name );

			result.append_fmt( "\n{\n%S\n}\n", Body->to_string() );
		}
		break;

		case Destructor_Fwd :
		{
			if ( Specs )
			{
				CodeSpecifiers specs = Specs->cast< CodeSpecifiers >();

				if ( specs.has( ESpecifier::Virtual ) )
					result.append_fmt( "virtual ~%S();\n", Parent->Name );
				else
					result.append_fmt( "~%S()", Parent->Name );

				if ( specs.has( ESpecifier::Pure ) )
					result.append( " = 0;" );
			}
			else
				result.append_fmt( "~%S();", Parent->Name );

			if ( InlineCmt )
				result.append_fmt( "  %S", InlineCmt->Content );
			else
				result.append( "\n" );
		}
		break;

		case Enum :
		{
			if ( bitfield_is_equal( u32, ModuleFlags, ModuleFlag::Export ) )
				result.append( "export " );

			if ( Attributes || UnderlyingType )
			{
				result.append( "enum " );

				if ( Attributes )
					result.append_fmt( "%S ", Attributes->to_string() );

				if ( UnderlyingType )
					result.append_fmt( "%S : %S\n{\n%S\n}", Name, UnderlyingType->to_string(), Body->to_string() );

				else
					result.append_fmt( "%S\n{\n%S\n}", Name, Body->to_string() );
			}
			else
				result.append_fmt( "enum %S\n{\n%S\n}", Name, Body->to_string() );

			if ( Parent == nullptr || ( Parent->Type != ECode::Typedef && Parent->Type != ECode::Variable ) )
				result.append( ";\n" );
		}
		break;

		case Enum_Fwd :
		{
			if ( bitfield_is_equal( u32, ModuleFlags, ModuleFlag::Export ) )
				result.append( "export " );

			if ( Attributes )
				result.append_fmt( "%S ", Attributes->to_string() );

			result.append_fmt( "enum %S : %S", Name, UnderlyingType->to_string() );

			if ( Parent == nullptr || ( Parent->Type != ECode::Typedef && Parent->Type != ECode::Variable ) )
			{
				if ( InlineCmt )
					result.append_fmt( ";  %S", InlineCmt->Content );
				else
					result.append( ";\n" );
			}
		}
		break;

		case Enum_Class :
		{
			if ( bitfield_is_equal( u32, ModuleFlags, ModuleFlag::Export ) )
				result.append( "export " );

			if ( Attributes || UnderlyingType )
			{
				result.append( "enum class " );

				if ( Attributes )
				{
					result.append_fmt( "%S ", Attributes->to_string() );
				}

				if ( UnderlyingType )
				{
					result.append_fmt( "%S : %S\n{\n%S\n}", Name, UnderlyingType->to_string(), Body->to_string() );
				}
				else
				{
					result.append_fmt( "%S\n{\n%S\n}", Name, Body->to_string() );
				}
			}
			else
			{
				result.append_fmt( "enum class %S\n{\n%S\n}", Body->to_string() );
			}

			if ( Parent == nullptr || ( Parent->Type != ECode::Typedef && Parent->Type != ECode::Variable ) )
				result.append( ";\n" );
		}
		break;

		case Enum_Class_Fwd :
		{
			if ( bitfield_is_equal( u32, ModuleFlags, ModuleFlag::Export ) )
				result.append( "export " );

			result.append( "enum class " );

			if ( Attributes )
				result.append_fmt( "%S ", Attributes->to_string() );

			result.append_fmt( "%S : %S", Name, UnderlyingType->to_string() );

			if ( Parent == nullptr || ( Parent->Type != ECode::Typedef && Parent->Type != ECode::Variable ) )
			{
				if ( InlineCmt )
					result.append_fmt( ";  %S", InlineCmt->Content );
				else
					result.append( ";\n" );
			}
		}
		break;

		case Export_Body :
		{
			result.append_fmt( "export\n{\n" );

			Code curr = { this };
			s32  left = NumEntries;
			while ( left-- )
			{
				result.append_fmt( "%S", curr.to_string() );
				++curr;
			}

			result.append_fmt( "};\n" );
		}
		break;

		case Extern_Linkage :
			result.append_fmt( "extern \"%S\"\n{\n%S\n}\n", Name, Body->to_string() );
			break;

		case Friend :
			result.append_fmt( "friend %S", Declaration->to_string() );

			if ( result[ result.length() - 1 ] != ';' )
			{
				result.append( ";" );
			}

			if ( InlineCmt )
				result.append_fmt( "  %S", InlineCmt->Content );
			else
				result.append( "\n" );
			break;

		case Function :
		{
			if ( bitfield_is_equal( u32, ModuleFlags, ModuleFlag::Export ) )
				result.append( "export" );

			if ( Attributes )
				result.append_fmt( " %S ", Attributes->to_string() );

			if ( Specs )
			{
				for ( SpecifierT spec : Specs->cast< CodeSpecifiers >() )
				{
					if ( ! ESpecifier::is_trailing( spec ) )
					{
						StrC spec_str = ESpecifier::to_str( spec );
						result.append_fmt( " %.*s", spec_str.Len, spec_str.Ptr );
					}
				}
			}

			if ( Attributes || Specs )
				result.append( "\n" );

			if ( ReturnType )
				result.append_fmt( "%S %S(", ReturnType->to_string(), Name );

			else
				result.append_fmt( "%S(", Name );

			if ( Params )
				result.append_fmt( "%S)", Params->to_string() );

			else
				result.append( ")" );

			if ( Specs )
			{
				for ( SpecifierT spec : Specs->cast< CodeSpecifiers >() )
				{
					if ( ESpecifier::is_trailing( spec ) )
					{
						StrC spec_str = ESpecifier::to_str( spec );
						result.append_fmt( " %.*s", spec_str.Len, spec_str.Ptr );
					}
				}
			}

			result.append_fmt( "\n{\n%S\n}\n", Body->to_string() );
		}
		break;

		case Function_Fwd :
		{
			if ( bitfield_is_equal( u32, ModuleFlags, ModuleFlag::Export ) )
				result.append( "export " );

			if ( Attributes )
				result.append_fmt( "%S ", Attributes->to_string() );

			if ( Specs )
			{
				for ( SpecifierT spec : Specs->cast< CodeSpecifiers >() )
				{
					if ( ! ESpecifier::is_trailing( spec ) )
					{
						StrC spec_str = ESpecifier::to_str( spec );
						result.append_fmt( " %.*s", spec_str.Len, spec_str.Ptr );
					}
				}
			}

			if ( Attributes || Specs )
			{
				result.append( "\n" );
			}

			if ( ReturnType )
				result.append_fmt( "%S %S(", ReturnType->to_string(), Name );

			else
				result.append_fmt( "%S(", Name );

			if ( Params )
				result.append_fmt( "%S)", Params->to_string() );

			else
				result.append( ")" );

			if ( Specs )
			{
				for ( SpecifierT spec : Specs->cast< CodeSpecifiers >() )
				{
					if ( ESpecifier::is_trailing( spec ) )
					{
						StrC spec_str = ESpecifier::to_str( spec );
						result.append_fmt( " %.*s", spec_str.Len, spec_str.Ptr );
					}
				}
			}

			if ( InlineCmt )
				result.append_fmt( ";  %S", InlineCmt->Content );
			else
				result.append( ";\n" );
		}
		break;

		case Module :
			if ( ( ( u32( ModuleFlag::Export ) & u32( ModuleFlags ) ) == u32( ModuleFlag::Export ) ) )
				result.append( "export " );

			if ( ( ( u32( ModuleFlag::Import ) & u32( ModuleFlags ) ) == u32( ModuleFlag::Import ) ) )
				result.append( "import " );

			result.append_fmt( "%S;\n", Name );
			break;

		case Namespace :
			if ( bitfield_is_equal( u32, ModuleFlags, ModuleFlag::Export ) )
				result.append( "export " );

			result.append_fmt( "namespace %S\n{\n%S\n}\n", Name, Body->to_string() );
			break;

		case Operator :
		case Operator_Member :
		{
			if ( bitfield_is_equal( u32, ModuleFlags, ModuleFlag::Export ) )
				result.append( "export " );

			if ( Attributes )
				result.append_fmt( "%S ", Attributes->to_string() );

			if ( Attributes )
				result.append_fmt( "%S ", Attributes->to_string() );

			if ( Specs )
			{
				for ( SpecifierT spec : Specs->cast< CodeSpecifiers >() )
				{
					if ( ! ESpecifier::is_trailing( spec ) )
					{
						StrC spec_str = ESpecifier::to_str( spec );
						result.append_fmt( " %.*s", spec_str.Len, spec_str.Ptr );
					}
				}
			}

			if ( Attributes || Specs )
			{
				result.append( "\n" );
			}

			if ( ReturnType )
				result.append_fmt( "%S %S (", ReturnType->to_string(), Name );

			if ( Params )
				result.append_fmt( "%S)", Params->to_string() );

			else
				result.append( ")" );

			if ( Specs )
			{
				for ( SpecifierT spec : Specs->cast< CodeSpecifiers >() )
				{
					if ( ESpecifier::is_trailing( spec ) )
					{
						StrC spec_str = ESpecifier::to_str( spec );
						result.append_fmt( " %.*s", spec_str.Len, spec_str.Ptr );
					}
				}
			}

			result.append_fmt( "\n{\n%S\n}\n", Body->to_string() );
		}
		break;

		case Operator_Fwd :
		case Operator_Member_Fwd :
		{
			if ( bitfield_is_equal( u32, ModuleFlags, ModuleFlag::Export ) )
				result.append( "export " );

			if ( Attributes )
				result.append_fmt( "%S\n", Attributes->to_string() );

			if ( Specs )
			{
				for ( SpecifierT spec : Specs->cast< CodeSpecifiers >() )
				{
					if ( ! ESpecifier::is_trailing( spec ) )
					{
						StrC spec_str = ESpecifier::to_str( spec );
						result.append_fmt( " %.*s", spec_str.Len, spec_str.Ptr );
					}
				}
			}

			if ( Attributes || Specs )
			{
				result.append( "\n" );
			}

			result.append_fmt( "%S %S (", ReturnType->to_string(), Name );

			if ( Params )
				result.append_fmt( "%S)", Params->to_string() );

			else
				result.append_fmt( ")" );

			if ( Specs )
			{
				for ( SpecifierT spec : Specs->cast< CodeSpecifiers >() )
				{
					if ( ESpecifier::is_trailing( spec ) )
					{
						StrC spec_str = ESpecifier::to_str( spec );
						result.append_fmt( " %.*s", spec_str.Len, spec_str.Ptr );
					}
				}
			}

			if ( InlineCmt )
				result.append_fmt( ";  %S", InlineCmt->Content );
			else
				result.append( ";\n" );
		}
		break;

		case Operator_Cast :
		{
			if ( Specs )
			{
				// TODO : Add support for specifies before the operator keyword

				if ( Name && Name.length() )
					result.append_fmt( "%Soperator %S()", Name, ValueType->to_string() );
				else
					result.append_fmt( "operator %S()", ValueType->to_string() );

				for ( SpecifierT spec : Specs->cast< CodeSpecifiers >() )
				{
					if ( ESpecifier::is_trailing( spec ) )
					{
						StrC spec_str = ESpecifier::to_str( spec );
						result.append_fmt( " %.*s", spec_str.Len, spec_str.Ptr );
					}
				}

				result.append_fmt( "\n{\n%S\n}\n", Body->to_string() );
				break;
			}

			if ( Name && Name.length() )
				result.append_fmt( "%Soperator %S()\n{\n%S\n}\n", Name, ValueType->to_string(), Body->to_string() );
			else
				result.append_fmt( "operator %S()\n{\n%S\n}\n", ValueType->to_string(), Body->to_string() );
		}
		break;

		case Operator_Cast_Fwd :
			if ( Specs )
			{
				// TODO : Add support for specifies before the operator keyword

				result.append_fmt( "operator %S()", ValueType->to_string() );

				for ( SpecifierT spec : Specs->cast< CodeSpecifiers >() )
				{
					if ( ESpecifier::is_trailing( spec ) )
					{
						StrC spec_str = ESpecifier::to_str( spec );
						result.append_fmt( " %*s", spec_str.Len, spec_str.Ptr );
					}
				}

				if ( InlineCmt )
					result.append_fmt( ";  %S", InlineCmt->Content );
				else
					result.append( ";\n" );
				break;
			}

			if ( InlineCmt )
				result.append_fmt( "operator %S();  %S", ValueType->to_string() );
			else
				result.append_fmt( "operator %S();\n", ValueType->to_string() );
			break;

		case Parameters :
		{
			if ( ValueType == nullptr )
			{
				result.append_fmt( "%S", Name );
				break;
			}

			if ( Name )
				result.append_fmt( "%S %S", ValueType->to_string(), Name );

			else
				result.append_fmt( "%S", ValueType->to_string() );

			if ( Value )
				result.append_fmt( "= %S", Value->to_string() );

			if ( NumEntries - 1 > 0 )
			{
				for ( CodeParam param : CodeParam { ( AST_Param* )Next } )
				{
					result.append_fmt( ", %S", param.to_string() );
				}
			}
		}
		break;
		case Preprocess_Define :
			result.append_fmt( "#define %S %S\n", Name, Content );
			break;

		case Preprocess_If :
			result.append_fmt( "#if %S\n", Content );
			break;

		case Preprocess_IfDef :
			result.append_fmt( "#ifdef %S\n", Content );
			break;

		case Preprocess_IfNotDef :
			result.append_fmt( "#ifndef %S\n", Content );
			break;

		case Preprocess_Include :
			result.append_fmt( "#include %S\n", Content );
			break;

		case Preprocess_ElIf :
			result.append_fmt( "#elif %S\n", Content );
			break;

		case Preprocess_Else :
			result.append_fmt( "#else\n" );
			break;

		case Preprocess_EndIf :
			result.append_fmt( "#endif\n" );
			break;

		case Preprocess_Pragma :
			result.append_fmt( "#pragma %S\n", Content );
			break;

		case Specifiers :
		{
			s32 idx  = 0;
			s32 left = NumEntries;
			while ( left-- )
			{
				StrC spec = ESpecifier::to_str( ArrSpecs[ idx ] );
				result.append_fmt( "%.*s ", spec.Len, spec.Ptr );
				idx++;
			}
		}
		break;

		case Struct :
		{
			if ( bitfield_is_equal( u32, ModuleFlags, ModuleFlag::Export ) )
				result.append( "export " );

			result.append( "struct " );

			if ( Attributes )
			{
				result.append_fmt( "%S ", Attributes->to_string() );
			}

			if ( ParentType )
			{
				char const* access_level = to_str( ParentAccess );

				result.append_fmt( "%S : %s %S", Name, access_level, ParentType );

				CodeType interface = ParentType->Next->cast< CodeType >();
				if ( interface )
					result.append( "\n" );

				while ( interface )
				{
					result.append_fmt( ", %S", interface.to_string() );
					interface = interface->Next ? interface->Next->cast< CodeType >() : Code { nullptr };
				}
			}
			else if ( Name )
			{
				result.append( Name );
			}

			if ( InlineCmt )
			{
				result.append_fmt( " // %S", InlineCmt->Content );
			}

			result.append_fmt( "\n{\n%S\n}", Body->to_string() );

			if ( Parent == nullptr || ( Parent->Type != ECode::Typedef && Parent->Type != ECode::Variable ) )
				result.append( ";\n" );
		}
		break;

		case Struct_Fwd :
		{
			if ( bitfield_is_equal( u32, ModuleFlags, ModuleFlag::Export ) )
				result.append( "export " );

			if ( Attributes )
				result.append_fmt( "struct %S %S", Attributes->to_string(), Name );

			else
				result.append_fmt( "struct %S", Name );

			if ( Parent == nullptr || ( Parent->Type != ECode::Typedef && Parent->Type != ECode::Variable ) )
			{
				if ( InlineCmt )
					result.append_fmt( ";  %S", InlineCmt->Content );
				else
					result.append( ";\n" );
			}
		}
		break;

		case Template :
		{
			if ( bitfield_is_equal( u32, ModuleFlags, ModuleFlag::Export ) )
				result.append( "export " );

			result.append_fmt( "template< %S >\n%S", Params->to_string(), Declaration->to_string() );
		}
		break;

		case Typedef :
		{
			if ( bitfield_is_equal( u32, ModuleFlags, ModuleFlag::Export ) )
				result.append( "export " );

			result.append( "typedef " );

			// Determines if the typedef is a function typename
			if ( UnderlyingType->ReturnType )
				result.append( UnderlyingType->to_string() );
			else
				result.append_fmt( "%S %S", UnderlyingType->to_string(), Name );

			if ( UnderlyingType->Type == Typename && UnderlyingType->ArrExpr )
			{
				result.append_fmt( "[ %S ];", UnderlyingType->ArrExpr->to_string() );

				AST* next_arr_expr = UnderlyingType->ArrExpr->Next;
				while ( next_arr_expr )
				{
					result.append_fmt( "[ %S ];", next_arr_expr->to_string() );
					next_arr_expr = next_arr_expr->Next;
				}
			}
			else
			{
				result.append( ";" );
			}

			if ( InlineCmt )
				result.append_fmt( "  %S", InlineCmt->Content );
			else
				result.append( "\n" );
		}
		break;

		case Typename :
		{
#if GEN_USE_NEW_TYPENAME_PARSING
			if ( ReturnType && Params )
			{
				if ( Attributes )
					result.append_fmt( "%S ", Attributes->to_string() );
				else
				{
					if ( Specs )
						result.append_fmt( "%S ( %S ) ( %S ) %S", ReturnType->to_string(), Name, Params->to_string(), Specs->to_string() );
					else
						result.append_fmt( "%S ( %S ) ( %S )", ReturnType->to_string(), Name, Params->to_string() );
				}

				break;
			}
#else
			if ( ReturnType && Params )
			{
				if ( Attributes )
					result.append_fmt( "%S ", Attributes->to_string() );
				else
				{
					if ( Specs )
						result.append_fmt( "%S %S ( %S ) %S", ReturnType->to_string(), Name, Params->to_string(), Specs->to_string() );
					else
						result.append_fmt( "%S %S ( %S )", ReturnType->to_string(), Name, Params->to_string() );
				}

				break;
			}
#endif

			if ( Attributes )
				result.append_fmt( "%S ", Attributes->to_string() );

			if ( Specs )
				result.append_fmt( "%S %S", Name, Specs->to_string() );
			else
				result.append_fmt( "%S", Name );

			if ( IsParamPack )
				result.append( "..." );
		}
		break;

		case Union :
		{
			if ( bitfield_is_equal( u32, ModuleFlags, ModuleFlag::Export ) )
				result.append( "export " );

			result.append( "union " );

			if ( Attributes )
				result.append_fmt( "%S ", Attributes->to_string() );

			if ( Name )
			{
				result.append_fmt( "%S\n{\n%S\n}", Name, Body->to_string() );
			}
			else
			{
				// Anonymous union
				result.append_fmt( "\n{\n%S\n}", Body->to_string() );
			}

			if ( Parent == nullptr || ( Parent->Type != ECode::Typedef && Parent->Type != ECode::Variable ) )
				result.append( ";\n" );
		}
		break;

		case Using :
		{
			if ( bitfield_is_equal( u32, ModuleFlags, ModuleFlag::Export ) )
				result.append( "export " );

			if ( Attributes )
				result.append_fmt( "%S ", Attributes->to_string() );

			if ( UnderlyingType )
			{
				result.append_fmt( "using %S = %S", Name, UnderlyingType->to_string() );

				if ( UnderlyingType->ArrExpr )
				{
					result.append_fmt( "[ %S ]", UnderlyingType->ArrExpr->to_string() );

					AST* next_arr_expr = UnderlyingType->ArrExpr->Next;
					while ( next_arr_expr )
					{
						result.append_fmt( "[ %S ]", next_arr_expr->to_string() );
						next_arr_expr = next_arr_expr->Next;
					}
				}

				result.append( ";" );
			}
			else
				result.append_fmt( "using %S;", Name );

			if ( InlineCmt )
				result.append_fmt( "  %S\n", InlineCmt->Content );
			else
				result.append( "\n" );
		}
		break;

		case Using_Namespace :
			if ( InlineCmt )
				result.append_fmt( "using namespace $S;  %S", Name, InlineCmt->Content );
			else
				result.append_fmt( "using namespace %s;\n", Name );
			break;

		case Variable :
		{
			if ( Parent && Parent->Type == Variable )
			{
				// Its a comma-separated variable ( a NextVar )

				if ( Specs )
					result.append_fmt( "%S ", Specs->to_string() );

				result.append( Name );

				if ( ArrExpr )
				{
					result.append_fmt( "[ %S ]", ArrExpr->to_string() );

					AST* next_arr_expr = ArrExpr->Next;
					while ( next_arr_expr )
					{
						result.append_fmt( "[ %S ]", next_arr_expr->to_string() );
						next_arr_expr = next_arr_expr->Next;
					}
				}

				if ( Value )
					result.append_fmt( " = %S", Value->to_string() );

				// Keep the chain going...
				if ( NextVar )
					result.append_fmt( ", %S", NextVar->to_string() );
			}

			if ( bitfield_is_equal( u32, ModuleFlags, ModuleFlag::Export ) )
				result.append( "export " );

			if ( Attributes || Specs )
			{
				if ( Attributes )
					result.append_fmt( "%S ", Specs->to_string() );

				if ( Specs )
					result.append_fmt( "%S\n", Specs->to_string() );

				result.append_fmt( "%S %S", ValueType->to_string(), Name );

				if ( ValueType->ArrExpr )
				{
					result.append_fmt( "[ %S ]", ValueType->ArrExpr->to_string() );

					AST* next_arr_expr = ValueType->ArrExpr->Next;
					while ( next_arr_expr )
					{
						result.append_fmt( "[ %S ]", next_arr_expr->to_string() );
						next_arr_expr = next_arr_expr->Next;
					}
				}

				if ( BitfieldSize )
					result.append_fmt( " : %S", BitfieldSize->to_string() );

				if ( Value )
					result.append_fmt( " = %S", Value->to_string() );

				if ( NextVar )
					result.append_fmt( ", %S", NextVar->to_string() );

				if ( InlineCmt )
					result.append_fmt( ";  %S", InlineCmt->Content );
				else
					result.append( ";\n" );

				break;
			}

			if ( BitfieldSize )
				result.append_fmt( "%S %S : %S", ValueType->to_string(), Name, BitfieldSize->to_string() );

			else if ( ValueType->ArrExpr )
			{
				result.append_fmt( "%S %S[ %S ]", ValueType->to_string(), Name, ValueType->ArrExpr->to_string() );

				AST* next_arr_expr = ValueType->ArrExpr->Next;
				while ( next_arr_expr )
				{
					result.append_fmt( "[ %S ]", next_arr_expr->to_string() );
					next_arr_expr = next_arr_expr->Next;
				}
			}

			else
				result.append_fmt( "%S %S", ValueType->to_string(), Name );

			if ( Value )
				result.append_fmt( " = %S", Value->to_string() );

			if ( NextVar )
				result.append_fmt( ", %S", NextVar->to_string() );

			result.append( ";" );

			if ( InlineCmt )
				result.append_fmt( "  %S", InlineCmt->Content );
			else
				result.append( "\n" );
		}
		break;

		case Enum_Body :
		case Class_Body :
		case Extern_Linkage_Body :
		case Function_Body :
		case Global_Body :
		case Namespace_Body :
		case Struct_Body :
		case Union_Body :
		{
			Code curr = Front->cast< Code >();
			s32  left = NumEntries;
			while ( left-- )
			{
				result.append_fmt( "%S", curr.to_string() );
				++curr;
			}
		}
		break;
	}

	return result;
}

bool AST::is_equal( AST* other )
{
	/*
	    AST values are either some u32 value, a cached string, or a pointer to another AST.

	    u32 values are compared by value.
	    Cached strings are compared by pointer.
	    AST nodes are compared with AST::is_equal.
	*/
	if ( other == nullptr )
	{
		log_fmt( "AST::is_equal: other is null\nAST: %S", debug_str() );
		return false;
	}

	if ( Type != other->Type )
	{
		log_fmt( "AST::is_equal: Type check failure with other\nAST: %S\nOther: %S", debug_str(), other->debug_str() );

		return false;
	}

	switch ( Type )
	{
		using namespace ECode;

#define check_member_val( val )           \
	if ( val != other->val )              \
	{                                     \
		log_fmt(                          \
		"\nAST::is_equal: Member - " #val \
		" failed\n"                       \
		"AST  : %S\n"                     \
		"Other: %S\n",                    \
		debug_str(),                      \
		other->debug_str()                \
		);                                \
                                          \
		return false;                     \
	}

#define check_member_str( str )                  \
	if ( str != other->str )                     \
	{                                            \
		log_fmt(                                 \
		"\nAST::is_equal: Member string - " #str \
		" failed\n"                              \
		"AST  : %S\n"                            \
		"Other: %S\n",                           \
		debug_str(),                             \
		other->debug_str()                       \
		);                                       \
                                                 \
		return false;                            \
	}

#define check_member_content( content )                           \
	if ( content != other->content )                              \
	{                                                             \
		log_fmt(                                                  \
		"\nAST::is_equal: Member content - " #content             \
		" failed\n"                                               \
		"AST  : %S\n"                                             \
		"Other: %S\n",                                            \
		debug_str(),                                              \
		other->debug_str()                                        \
		);                                                        \
                                                                  \
		log_fmt(                                                  \
		"Content cannot be trusted to be unique with this check " \
		"so it must be verified by eye for now\n"                 \
		"AST   Content:\n%S\n"                                    \
		"Other Content:\n%S\n",                                   \
		content.visualize_whitespace(),                           \
		other->content.visualize_whitespace()                     \
		);                                                        \
	}

#define check_member_ast( ast )                        \
	if ( ast )                                         \
	{                                                  \
		if ( other->ast == nullptr )                   \
		{                                              \
			log_fmt(                                   \
			"\nAST::is_equal: Failed for member " #ast \
			" other equivalent param is null\n"        \
			"AST  : %s\n"                              \
			"Other: %s\n"                              \
			"For ast member: %s\n",                    \
			debug_str(),                               \
			other->debug_str(),                        \
			ast->debug_str()                           \
			);                                         \
                                                       \
			return false;                              \
		}                                              \
                                                       \
		if ( ! ast->is_equal( other->ast ) )           \
		{                                              \
			log_fmt(                                   \
			"\nAST::is_equal: Failed for " #ast        \
			"\n"                                       \
			"AST  : %S\n"                              \
			"Other: %S\n"                              \
			"For     ast member: %S\n"                 \
			"other's ast member: %S\n",                \
			debug_str(),                               \
			other->debug_str(),                        \
			ast->debug_str(),                          \
			other->ast->debug_str()                    \
			);                                         \
                                                       \
			return false;                              \
		}                                              \
	}

		case NewLine :
		case Access_Public :
		case Access_Protected :
		case Access_Private :
		case Preprocess_Else :
		case Preprocess_EndIf :
			return true;


		// Comments are not validated.
		case Comment :
			return true;

		case Execution :
		case PlatformAttributes :
		case Untyped :
		{
			check_member_content( Content );

			return true;
		}

		case Class_Fwd :
		case Struct_Fwd :
		{
			check_member_str( Name );
			check_member_ast( ParentType );
			check_member_val( ParentAccess );
			check_member_ast( Attributes );

			return true;
		}

		case Class :
		case Struct :
		{
			check_member_val( ModuleFlags );
			check_member_str( Name );
			check_member_ast( ParentType );
			check_member_val( ParentAccess );
			check_member_ast( Attributes );
			check_member_ast( Body );

			return true;
		}

		case Constructor :
		{
			check_member_ast( InitializerList );
			check_member_ast( Params );
			check_member_ast( Body );

			return true;
		}

		case Constructor_Fwd :
		{
			check_member_ast( InitializerList );
			check_member_ast( Params );

			return true;
		}

		case Destructor :
		{
			check_member_ast( Specs );
			check_member_ast( Body );

			return true;
		}

		case Destructor_Fwd :
		{
			check_member_ast( Specs );

			return true;
		}

		case Enum :
		case Enum_Class :
		{
			check_member_val( ModuleFlags );
			check_member_str( Name );
			check_member_ast( Attributes );
			check_member_ast( UnderlyingType );
			check_member_ast( Body );

			return true;
		}

		case Enum_Fwd :
		case Enum_Class_Fwd :
		{
			check_member_val( ModuleFlags );
			check_member_str( Name );
			check_member_ast( Attributes );
			check_member_ast( UnderlyingType );

			return true;
		}

		case Extern_Linkage :
		{
			check_member_str( Name );
			check_member_ast( Body );

			return true;
		}

		case Friend :
		{
			check_member_str( Name );
			check_member_ast( Declaration );

			return true;
		}

		case Function :
		{
			check_member_val( ModuleFlags );
			check_member_str( Name );
			check_member_ast( ReturnType );
			check_member_ast( Attributes );
			check_member_ast( Specs );
			check_member_ast( Params );
			check_member_ast( Body );

			return true;
		}

		case Function_Fwd :
		{
			check_member_val( ModuleFlags );
			check_member_str( Name );
			check_member_ast( ReturnType );
			check_member_ast( Attributes );
			check_member_ast( Specs );
			check_member_ast( Params );

			return true;
		}

		case Module :
		{
			check_member_val( ModuleFlags );
			check_member_str( Name );

			return true;
		}

		case Namespace :
		{
			check_member_val( ModuleFlags );
			check_member_str( Name );
			check_member_ast( Body );

			return true;
		}

		case Operator :
		case Operator_Member :
		{
			check_member_val( ModuleFlags );
			check_member_str( Name );
			check_member_ast( ReturnType );
			check_member_ast( Attributes );
			check_member_ast( Specs );
			check_member_ast( Params );
			check_member_ast( Body );

			return true;
		}

		case Operator_Fwd :
		case Operator_Member_Fwd :
		{
			check_member_val( ModuleFlags );
			check_member_str( Name );
			check_member_ast( ReturnType );
			check_member_ast( Attributes );
			check_member_ast( Specs );
			check_member_ast( Params );

			return true;
		}

		case Operator_Cast :
		{
			check_member_str( Name );
			check_member_ast( Specs );
			check_member_ast( ValueType );
			check_member_ast( Body );

			return true;
		}

		case Operator_Cast_Fwd :
		{
			check_member_str( Name );
			check_member_ast( Specs );
			check_member_ast( ValueType );

			return true;
		}

		case Parameters :
		{
			if ( NumEntries > 1 )
			{
				AST* curr       = this;
				AST* curr_other = other;
				while ( curr != nullptr )
				{
					if ( curr )
					{
						if ( curr_other == nullptr )
						{
							log_fmt(
							"\nAST::is_equal: Failed for parameter, other equivalent param is null\n"
							"AST  : %S\n"
							"Other: %S\n"
							"For ast member: %S\n",
							curr->debug_str()
							);

							return false;
						}

						if ( curr->Name != curr_other->Name )
						{
							log_fmt(
							"\nAST::is_equal: Failed for parameter name check\n"
							"AST  : %S\n"
							"Other: %S\n"
							"For     ast member: %S\n"
							"other's ast member: %S\n",
							debug_str(),
							other->debug_str(),
							curr->debug_str(),
							curr_other->debug_str()
							);
							return false;
						}

						if ( curr->ValueType && ! curr->ValueType->is_equal( curr_other->ValueType ) )
						{
							log_fmt(
							"\nAST::is_equal: Failed for parameter value type check\n"
							"AST  : %S\n"
							"Other: %S\n"
							"For     ast member: %S\n"
							"other's ast member: %S\n",
							debug_str(),
							other->debug_str(),
							curr->debug_str(),
							curr_other->debug_str()
							);
							return false;
						}

						if ( curr->Value && ! curr->Value->is_equal( curr_other->Value ) )
						{
							log_fmt(
							"\nAST::is_equal: Failed for parameter value check\n"
							"AST  : %S\n"
							"Other: %S\n"
							"For     ast member: %S\n"
							"other's ast member: %S\n",
							debug_str(),
							other->debug_str(),
							curr->debug_str(),
							curr_other->debug_str()
							);
							return false;
						}
					}

					curr       = curr->Next;
					curr_other = curr_other->Next;
				}

				check_member_val( NumEntries );

				return true;
			}

			check_member_str( Name );
			check_member_ast( ValueType );
			check_member_ast( Value );
			check_member_ast( ArrExpr );

			return true;
		}

		case Preprocess_Define :
		{
			check_member_str( Name );
			check_member_content( Content );

			return true;
		}

		case Preprocess_If :
		case Preprocess_IfDef :
		case Preprocess_IfNotDef :
		case Preprocess_ElIf :
		{
			check_member_content( Content );

			return true;
		}

		case Preprocess_Include :
		case Preprocess_Pragma :
		{
			check_member_content( Content );

			return true;
		}

		case Specifiers :
		{
			check_member_val( NumEntries );
			check_member_str( Name );
			for ( s32 idx = 0; idx < NumEntries; ++idx )
			{
				check_member_val( ArrSpecs[ idx ] );
			}
			return true;
		}

		case Template :
		{
			check_member_val( ModuleFlags );
			check_member_str( Name );
			check_member_ast( Params );
			check_member_ast( Declaration );

			return true;
		}

		case Typedef :
		{
			check_member_val( IsFunction );
			check_member_val( ModuleFlags );
			check_member_str( Name );
			check_member_ast( Specs );
			check_member_ast( UnderlyingType );

			return true;
		}
		case Typename :
		{
			check_member_val( IsParamPack );
			check_member_str( Name );
			check_member_ast( Specs );
			check_member_ast( ArrExpr );

			return true;
		}

		case Union :
		{
			check_member_val( ModuleFlags );
			check_member_str( Name );
			check_member_ast( Attributes );
			check_member_ast( Body );

			return true;
		}

		case Using :
		case Using_Namespace :
		{
			check_member_val( ModuleFlags );
			check_member_str( Name );
			check_member_ast( UnderlyingType );
			check_member_ast( Attributes );

			return true;
		}

		case Variable :
		{
			check_member_val( ModuleFlags );
			check_member_str( Name );
			check_member_ast( ValueType );
			check_member_ast( BitfieldSize );
			check_member_ast( Value );
			check_member_ast( Attributes );
			check_member_ast( Specs );
			check_member_ast( NextVar );

			return true;
		}

		case Class_Body :
		case Enum_Body :
		case Export_Body :
		case Global_Body :
		case Namespace_Body :
		case Struct_Body :
		case Union_Body :
		{
			check_member_ast( Front );
			check_member_ast( Back );

			AST* curr       = Front;
			AST* curr_other = other->Front;
			while ( curr != nullptr )
			{
				if ( curr_other == nullptr )
				{
					log_fmt(
					"\nAST::is_equal: Failed for body, other equivalent param is null\n"
					"AST  : %S\n"
					"Other: %S\n"
					"For ast member: %S\n",
					curr->debug_str()
					);

					return false;
				}

				if ( ! curr->is_equal( curr_other ) )
				{
					log_fmt(
					"\nAST::is_equal: Failed for body\n"
					"AST  : %S\n"
					"Other: %S\n"
					"For     ast member: %S\n"
					"other's ast member: %S\n",
					debug_str(),
					other->debug_str(),
					curr->debug_str(),
					curr_other->debug_str()
					);

					return false;
				}

				curr       = curr->Next;
				curr_other = curr_other->Next;
			}

			check_member_val( NumEntries );

			return true;
		}

#undef check_member_val
#undef check_member_str
#undef check_member_ast
	}

	return true;
}

bool AST::validate_body()
{
	using namespace ECode;

#define CheckEntries( Unallowed_Types )                                                                           \
	do                                                                                                            \
	{                                                                                                             \
		for ( Code entry : cast< CodeBody >() )                                                                   \
		{                                                                                                         \
			switch ( entry->Type )                                                                                \
			{                                                                                                     \
				Unallowed_Types log_failure( "AST::validate_body: Invalid entry in body %s", entry.debug_str() ); \
				return false;                                                                                     \
			}                                                                                                     \
		}                                                                                                         \
	} while ( 0 );

	switch ( Type )
	{
		case Class_Body :
			CheckEntries( GEN_AST_BODY_CLASS_UNALLOWED_TYPES );
			break;
		case Enum_Body :
			for ( Code entry : cast< CodeBody >() )
			{
				if ( entry->Type != Untyped )
				{
					log_failure( "AST::validate_body: Invalid entry in enum body (needs to be untyped or comment) %s", entry.debug_str() );
					return false;
				}
			}
			break;
		case Export_Body :
			CheckEntries( GEN_AST_BODY_CLASS_UNALLOWED_TYPES );
			break;
		case Extern_Linkage :
			CheckEntries( GEN_AST_BODY_EXTERN_LINKAGE_UNALLOWED_TYPES );
			break;
		case Function_Body :
			CheckEntries( GEN_AST_BODY_FUNCTION_UNALLOWED_TYPES );
			break;
		case Global_Body :
			for ( Code entry : cast< CodeBody >() )
			{
				switch ( entry->Type )
				{
					case Access_Public :
					case Access_Protected :
					case Access_Private :
					case PlatformAttributes :
					case Class_Body :
					case Enum_Body :
					case Execution :
					case Friend :
					case Function_Body :
					case Global_Body :
					case Namespace_Body :
					case Operator_Member :
					case Operator_Member_Fwd :
					case Parameters :
					case Specifiers :
					case Struct_Body :
					case Typename :
						log_failure( "AST::validate_body: Invalid entry in body %s", entry.debug_str() );
						return false;
				}
			}
			break;
		case Namespace_Body :
			CheckEntries( GEN_AST_BODY_NAMESPACE_UNALLOWED_TYPES );
			break;
		case Struct_Body :
			CheckEntries( GEN_AST_BODY_STRUCT_UNALLOWED_TYPES );
			break;
		case Union_Body :
			for ( Code entry : Body->cast< CodeBody >() )
			{
				if ( entry->Type != Untyped )
				{
					log_failure( "AST::validate_body: Invalid entry in union body (needs to be untyped or comment) %s", entry.debug_str() );
					return false;
				}
			}
			break;

		default :
			log_failure( "AST::validate_body: Invalid this AST does not have a body %s", debug_str() );
			return false;
	}

	return false;

#undef CheckEntries
}

#pragma endregion AST

#pragma region Interface

internal void init_parser();
internal void deinit_parser();

internal void* Global_Allocator_Proc( void* allocator_data, AllocType type, sw size, sw alignment, void* old_memory, sw old_size, u64 flags )
{
	Arena* last = &Global_AllocatorBuckets.back();

	switch ( type )
	{
		case EAllocation_ALLOC :
		{
			if ( ( last->TotalUsed + size ) > last->TotalSize )
			{
				Arena bucket = Arena::init_from_allocator( heap(), Global_BucketSize );

				if ( bucket.PhysicalStart == nullptr )
					GEN_FATAL( "Failed to create bucket for Global_AllocatorBuckets" );

				if ( ! Global_AllocatorBuckets.append( bucket ) )
					GEN_FATAL( "Failed to append bucket to Global_AllocatorBuckets" );

				last = &Global_AllocatorBuckets.back();
			}

			return alloc_align( *last, size, alignment );
		}
		case EAllocation_FREE :
		{
			// Doesn't recycle.
		}
		break;
		case EAllocation_FREE_ALL :
		{
			// Memory::cleanup instead.
		}
		break;
		case EAllocation_RESIZE :
		{
			if ( last->TotalUsed + size > last->TotalSize )
			{
				Arena bucket = Arena::init_from_allocator( heap(), Global_BucketSize );

				if ( bucket.PhysicalStart == nullptr )
					GEN_FATAL( "Failed to create bucket for Global_AllocatorBuckets" );

				if ( ! Global_AllocatorBuckets.append( bucket ) )
					GEN_FATAL( "Failed to append bucket to Global_AllocatorBuckets" );

				last = &Global_AllocatorBuckets.back();
			}

			void* result = alloc_align( last->Backing, size, alignment );

			if ( result != nullptr && old_memory != nullptr )
			{
				mem_copy( result, old_memory, old_size );
			}

			return result;
		}
	}

	return nullptr;
}

internal void define_constants()
{
	Code::Global          = make_code();
	Code::Global->Name    = get_cached_string( txt( "Global Code" ) );
	Code::Global->Content = Code::Global->Name;

	Code::Invalid         = make_code();
	Code::Invalid.set_global();

	t_empty       = ( CodeType )make_code();
	t_empty->Type = ECode::Typename;
	t_empty->Name = get_cached_string( txt( "" ) );
	t_empty.set_global();

	access_private       = make_code();
	access_private->Type = ECode::Access_Private;
	access_private->Name = get_cached_string( txt( "private:" ) );
	access_private.set_global();

	access_protected       = make_code();
	access_protected->Type = ECode::Access_Protected;
	access_protected->Name = get_cached_string( txt( "protected:" ) );
	access_protected.set_global();

	access_public       = make_code();
	access_public->Type = ECode::Access_Public;
	access_public->Name = get_cached_string( txt( "public:" ) );
	access_public.set_global();

	attrib_api_export = def_attributes( code( GEN_API_Export_Code ) );
	attrib_api_export.set_global();

	attrib_api_import = def_attributes( code( GEN_API_Import_Code ) );
	attrib_api_import.set_global();

	module_global_fragment          = make_code();
	module_global_fragment->Type    = ECode::Untyped;
	module_global_fragment->Name    = get_cached_string( txt( "module;" ) );
	module_global_fragment->Content = module_global_fragment->Name;
	module_global_fragment.set_global();

	module_private_fragment          = make_code();
	module_private_fragment->Type    = ECode::Untyped;
	module_private_fragment->Name    = get_cached_string( txt( "module : private;" ) );
	module_private_fragment->Content = module_private_fragment->Name;
	module_private_fragment.set_global();

	fmt_newline       = make_code();
	fmt_newline->Type = ECode::NewLine;
	fmt_newline.set_global();

	pragma_once          = ( CodePragma )make_code();
	pragma_once->Type    = ECode::Preprocess_Pragma;
	pragma_once->Name    = get_cached_string( txt( "once" ) );
	pragma_once->Content = pragma_once->Name;
	pragma_once.set_global();

	param_varadic            = ( CodeType )make_code();
	param_varadic->Type      = ECode::Parameters;
	param_varadic->Name      = get_cached_string( txt( "..." ) );
	param_varadic->ValueType = t_empty;
	param_varadic.set_global();

	preprocess_else       = ( CodePreprocessCond )make_code();
	preprocess_else->Type = ECode::Preprocess_Else;
	preprocess_else.set_global();

	preprocess_endif       = ( CodePreprocessCond )make_code();
	preprocess_endif->Type = ECode::Preprocess_EndIf;
	preprocess_endif.set_global();

#define def_constant_code_type( Type_ )    \
	t_##Type_ = def_type( name( Type_ ) ); \
	t_##Type_.set_global();

	def_constant_code_type( auto );
	def_constant_code_type( void );
	def_constant_code_type( int );
	def_constant_code_type( bool );
	def_constant_code_type( char );
	def_constant_code_type( wchar_t );
	def_constant_code_type( class );
	def_constant_code_type( typename );

#ifdef GEN_DEFINE_LIBRARY_CODE_CONSTANTS
	t_b32 = def_type( name( b32 ) );

	def_constant_code_type( s8 );
	def_constant_code_type( s16 );
	def_constant_code_type( s32 );
	def_constant_code_type( s64 );

	def_constant_code_type( u8 );
	def_constant_code_type( u16 );
	def_constant_code_type( u32 );
	def_constant_code_type( u64 );

	def_constant_code_type( sw );
	def_constant_code_type( uw );

	def_constant_code_type( f32 );
	def_constant_code_type( f64 );
#endif
#undef def_constant_code_type

#pragma push_macro( "forceinline" )
#pragma push_macro( "global" )
#pragma push_macro( "internal" )
#pragma push_macro( "local_persist" )
#pragma push_macro( "neverinline" )
#undef forceinline
#undef global
#undef internal
#undef local_persist
#undef neverinline

#define def_constant_spec( Type_, ... )                                    \
	spec_##Type_ = def_specifiers( num_args( __VA_ARGS__ ), __VA_ARGS__ ); \
	spec_##Type_.set_global();

	def_constant_spec( const, ESpecifier::Const );
	def_constant_spec( consteval, ESpecifier::Consteval );
	def_constant_spec( constexpr, ESpecifier::Constexpr );
	def_constant_spec( constinit, ESpecifier::Constinit );
	def_constant_spec( extern_linkage, ESpecifier::External_Linkage );
	def_constant_spec( final, ESpecifier::Final );
	def_constant_spec( forceinline, ESpecifier::ForceInline );
	def_constant_spec( global, ESpecifier::Global );
	def_constant_spec( inline, ESpecifier::Inline );
	def_constant_spec( internal_linkage, ESpecifier::Internal_Linkage );
	def_constant_spec( local_persist, ESpecifier::Local_Persist );
	def_constant_spec( mutable, ESpecifier::Mutable );
	def_constant_spec( neverinline, ESpecifier::NeverInline );
	def_constant_spec( noexcept, ESpecifier::NoExceptions );
	def_constant_spec( override, ESpecifier::Override );
	def_constant_spec( ptr, ESpecifier::Ptr );
	def_constant_spec( pure, ESpecifier::Pure ) def_constant_spec( ref, ESpecifier::Ref );
	def_constant_spec( register, ESpecifier::Register );
	def_constant_spec( rvalue, ESpecifier::RValue );
	def_constant_spec( static_member, ESpecifier::Static );
	def_constant_spec( thread_local, ESpecifier::Thread_Local );
	def_constant_spec( virtual, ESpecifier::Virtual );
	def_constant_spec( volatile, ESpecifier::Volatile )

	spec_local_persist = def_specifiers( 1, ESpecifier::Local_Persist );
	spec_local_persist.set_global();

#pragma pop_macro( "forceinline" )
#pragma pop_macro( "global" )
#pragma pop_macro( "internal" )
#pragma pop_macro( "local_persist" )
#pragma pop_macro( "neverinline" )

#undef def_constant_spec
}

void init()
{
	// Setup global allocator
	{
		GlobalAllocator         = AllocatorInfo { &Global_Allocator_Proc, nullptr };

		Global_AllocatorBuckets = Array< Arena >::init_reserve( heap(), 128 );

		if ( Global_AllocatorBuckets == nullptr )
			GEN_FATAL( "Failed to reserve memory for Global_AllocatorBuckets" );

		Arena bucket = Arena::init_from_allocator( heap(), Global_BucketSize );

		if ( bucket.PhysicalStart == nullptr )
			GEN_FATAL( "Failed to create first bucket for Global_AllocatorBuckets" );

		Global_AllocatorBuckets.append( bucket );
	}

	// Setup the arrays
	{
		CodePools = Array< Pool >::init_reserve( Allocator_DataArrays, InitSize_DataArrays );

		if ( CodePools == nullptr )
			GEN_FATAL( "gen::init: Failed to initialize the CodePools array" );

		StringArenas = Array< Arena >::init_reserve( Allocator_DataArrays, InitSize_DataArrays );

		if ( StringArenas == nullptr )
			GEN_FATAL( "gen::init: Failed to initialize the StringArenas array" );
	}

	// Setup the code pool and code entries arena.
	{
		Pool code_pool = Pool::init( Allocator_CodePool, CodePool_NumBlocks, sizeof( AST ) );

		if ( code_pool.PhysicalStart == nullptr )
			GEN_FATAL( "gen::init: Failed to initialize the code pool" );

		CodePools.append( code_pool );

		LexArena           = Arena::init_from_allocator( Allocator_Lexer, LexAllocator_Size );

		Arena string_arena = Arena::init_from_allocator( Allocator_StringArena, SizePer_StringArena );

		if ( string_arena.PhysicalStart == nullptr )
			GEN_FATAL( "gen::init: Failed to initialize the string arena" );

		StringArenas.append( string_arena );
	}

	// Setup the hash tables
	{
		StringCache = StringTable::init( Allocator_StringTable );

		if ( StringCache.Entries == nullptr )
			GEN_FATAL( "gen::init: Failed to initialize the StringCache" );
	}

	define_constants();
	init_parser();
}

void deinit()
{
	uw index = 0;
	uw left  = CodePools.num();
	do
	{
		Pool* code_pool = &CodePools[ index ];
		code_pool->free();
		index++;
	} while ( left--, left );

	index = 0;
	left  = StringArenas.num();
	do
	{
		Arena* string_arena = &StringArenas[ index ];
		string_arena->free();
		index++;
	} while ( left--, left );

	StringCache.destroy();

	CodePools.free();
	StringArenas.free();

	LexArena.free();

	index = 0;
	left  = Global_AllocatorBuckets.num();
	do
	{
		Arena* bucket = &Global_AllocatorBuckets[ index ];
		bucket->free();
		index++;
	} while ( left--, left );

	Global_AllocatorBuckets.free();
	deinit_parser();
}

void reset()
{
	s32 index = 0;
	s32 left  = CodePools.num();
	do
	{
		Pool* code_pool = &CodePools[ index ];
		code_pool->clear();
		index++;
	} while ( left--, left );

	index = 0;
	left  = StringArenas.num();
	do
	{
		Arena* string_arena     = &StringArenas[ index ];
		string_arena->TotalUsed = 0;
		;
		index++;
	} while ( left--, left );

	StringCache.clear();

	define_constants();
}

AllocatorInfo get_string_allocator( s32 str_length )
{
	Arena* last = &StringArenas.back();

	uw size_req = str_length + sizeof( String::Header ) + sizeof( char* );

	if ( last->TotalUsed + size_req > last->TotalSize )
	{
		Arena new_arena = Arena::init_from_allocator( Allocator_StringArena, SizePer_StringArena );

		if ( ! StringArenas.append( new_arena ) )
			GEN_FATAL( "gen::get_string_allocator: Failed to allocate a new string arena" );

		last = &StringArenas.back();
	}

	return *last;
}

// Will either make or retrive a code string.
StringCached get_cached_string( StrC str )
{
	s32 hash_length = str.Len > kilobytes( 1 ) ? kilobytes( 1 ) : str.Len;
	u64 key         = crc32( str.Ptr, hash_length );
	{
		StringCached* result = StringCache.get( key );

		if ( result )
			return *result;
	}

	String result = String::make( get_string_allocator( str.Len ), str );
	StringCache.set( key, result );

	return result;
}

// Used internally to retireve a Code object form the CodePool.
Code make_code()
{
	Pool* allocator = &CodePools.back();
	if ( allocator->FreeList == nullptr )
	{
		Pool code_pool = Pool::init( Allocator_CodePool, CodePool_NumBlocks, sizeof( AST ) );

		if ( code_pool.PhysicalStart == nullptr )
			GEN_FATAL( "gen::make_code: Failed to allocate a new code pool - CodePool allcoator returned nullptr." );

		if ( ! CodePools.append( code_pool ) )
			GEN_FATAL( "gen::make_code: Failed to allocate a new code pool - CodePools failed to append new pool." );

		allocator = &CodePools.back();
	}

	Code result { rcast( AST*, alloc( *allocator, sizeof( AST ) ) ) };
	// mem_set( result.ast, 0, sizeof(AST) );
	result->Type        = ECode::Invalid;

	result->Content     = { nullptr };
	result->Prev        = { nullptr };
	result->Next        = { nullptr };
	result->Token       = nullptr;
	result->Parent      = { nullptr };
	result->Name        = { nullptr };
	result->Type        = ECode::Invalid;
	result->ModuleFlags = ModuleFlag::Invalid;
	result->NumEntries  = 0;

	return result;
}

void set_allocator_data_arrays( AllocatorInfo allocator )
{
	Allocator_DataArrays = allocator;
}

void set_allocator_code_pool( AllocatorInfo allocator )
{
	Allocator_CodePool = allocator;
}

void set_allocator_lexer( AllocatorInfo allocator )
{
	Allocator_Lexer = allocator;
}

void set_allocator_string_arena( AllocatorInfo allocator )
{
	Allocator_StringArena = allocator;
}

void set_allocator_string_table( AllocatorInfo allocator )
{
	Allocator_StringArena = allocator;
}

#pragma region Upfront

enum class OpValidateResult : u32
{
	Fail,
	Global,
	Member
};

OpValidateResult operator__validate( OperatorT op, CodeParam params_code, CodeType ret_type, CodeSpecifiers specifier )
{
	using namespace EOperator;

	if ( op == EOperator::Invalid )
	{
		log_failure( "gen::def_operator: op cannot be invalid" );
		return OpValidateResult::Fail;
	}

#pragma region Helper Macros
#define check_params()                                                                                      \
	if ( ! params_code )                                                                                    \
	{                                                                                                       \
		log_failure( "gen::def_operator: params is null and operator%s requires it", to_str( op ) );        \
		return OpValidateResult::Fail;                                                                      \
	}                                                                                                       \
	if ( params_code->Type != ECode::Parameters )                                                           \
	{                                                                                                       \
		log_failure( "gen::def_operator: params is not of Parameters type - %s", params_code.debug_str() ); \
		return OpValidateResult::Fail;                                                                      \
	}

#define check_param_eq_ret()                                                           \
	if ( ! is_member_symbol && params_code->ValueType != ret_type )                    \
	{                                                                                  \
		log_failure(                                                                   \
		"gen_def_operator: operator%s requires first parameter to equal return type\n" \
		"param types: %s\n"                                                            \
		"return type: %s",                                                             \
		to_str( op ),                                                                  \
		params_code.debug_str(),                                                       \
		ret_type.debug_str()                                                           \
		);                                                                             \
		return OpValidateResult::Fail;                                                 \
	}
#pragma endregion Helper Macros

	if ( ! ret_type )
	{
		log_failure( "gen::def_operator: ret_type is null but is required by operator%s", to_str( op ) );
	}

	if ( ret_type->Type != ECode::Typename )
	{
		log_failure( "gen::def_operator: ret_type is not of typename type - %s", ret_type.debug_str() );
		return OpValidateResult::Fail;
	}

	bool is_member_symbol = false;

	switch ( op )
	{
#define specs( ... ) num_args( __VA_ARGS__ ), __VA_ARGS__
		case Assign :
			check_params();

			if ( params_code->NumEntries > 1 )
			{
				log_failure(
				"gen::def_operator: "
				"operator%s does not support non-member definition (more than one parameter provided) - %s",
				to_str( op ),
				params_code.debug_str()
				);
				return OpValidateResult::Fail;
			}

			is_member_symbol = true;
			break;

		case Assign_Add :
		case Assign_Subtract :
		case Assign_Multiply :
		case Assign_Divide :
		case Assign_Modulo :
		case Assign_BAnd :
		case Assign_BOr :
		case Assign_BXOr :
		case Assign_LShift :
		case Assign_RShift :
			check_params();

			if ( params_code->NumEntries == 1 )
				is_member_symbol = true;

			else
				check_param_eq_ret();

			if ( params_code->NumEntries > 2 )
			{
				log_failure(
				"gen::def_operator: operator%s may not be defined with more than two parametes - param count; %d\n%s",
				to_str( op ),
				params_code->NumEntries,
				params_code.debug_str()
				);
				return OpValidateResult::Fail;
			}
			break;

		case Increment :
		case Decrement :
			// If its not set, it just means its a prefix member op.
			if ( params_code )
			{
				if ( params_code->Type != ECode::Parameters )
				{
					log_failure( "gen::def_operator: operator%s params code provided is not of Parameters type - %s", to_str( op ), params_code.debug_str() );
					return OpValidateResult::Fail;
				}

				switch ( params_code->NumEntries )
				{
					case 1 :
						if ( params_code->ValueType.is_equal( t_int ) )
							is_member_symbol = true;

						else
							check_param_eq_ret();
						break;

					case 2 :
						check_param_eq_ret();

						if ( ! params_code.get( 1 ).is_equal( t_int ) )
						{
							log_failure(
							"gen::def_operator: "
							"operator%s requires second parameter of non-member definition to be int for post-decrement",
							to_str( op )
							);
							return OpValidateResult::Fail;
						}
						break;

					default :
						log_failure(
						"gen::def_operator: operator%s recieved unexpected number of parameters recived %d instead of 0-2",
						to_str( op ),
						params_code->NumEntries
						);
						return OpValidateResult::Fail;
				}
			}
			break;

		case Unary_Plus :
		case Unary_Minus :
		case BNot :
			if ( ! params_code )
				is_member_symbol = true;

			else
			{
				if ( params_code->Type != ECode::Parameters )
				{
					log_failure( "gen::def_operator: params is not of Parameters type - %s", params_code.debug_str() );
					return OpValidateResult::Fail;
				}

				if ( params_code->ValueType.is_equal( ret_type ) )
				{
					log_failure(
					"gen::def_operator: "
					"operator%s is non-member symbol yet first paramter does not equal return type\n"
					"param type: %s\n"
					"return type: %s\n",
					params_code.debug_str(),
					ret_type.debug_str()
					);
					return OpValidateResult::Fail;
				}

				if ( params_code->NumEntries > 1 )
				{
					log_failure(
					"gen::def_operator: operator%s may not have more than one parameter - param count: %d",
					to_str( op ),
					params_code->NumEntries
					);
					return OpValidateResult::Fail;
				}
			}
			break;

		case Add :
		case Subtract :
		case Multiply :
		case Divide :
		case Modulo :
		case BAnd :
		case BOr :
		case BXOr :
		case LShift :
		case RShift :
			check_params();

			switch ( params_code->NumEntries )
			{
				case 1 :
					is_member_symbol = true;
					break;

				case 2 :
					if ( ! params_code->ValueType.is_equal( ret_type ) )
					{
						log_failure(
						"gen::def_operator: "
						"operator%s is non-member symbol yet first paramter does not equal return type\n"
						"param type: %s\n"
						"return type: %s\n",
						params_code.debug_str(),
						ret_type.debug_str()
						);
						return OpValidateResult::Fail;
					}
					break;

				default :
					log_failure(
					"gen::def_operator: operator%s recieved unexpected number of paramters recived %d instead of 0-2",
					to_str( op ),
					params_code->NumEntries
					);
					return OpValidateResult::Fail;
			}
			break;

		case UnaryNot :
			if ( ! params_code )
				is_member_symbol = true;

			else
			{
				if ( params_code->Type != ECode::Parameters )
				{
					log_failure( "gen::def_operator: params is not of Parameters type - %s", params_code.debug_str() );
					return OpValidateResult::Fail;
				}

				if ( params_code->NumEntries != 1 )
				{
					log_failure(
					"gen::def_operator: operator%s recieved unexpected number of paramters recived %d instead of 0-1",
					to_str( op ),
					params_code->NumEntries
					);
					return OpValidateResult::Fail;
				}
			}

			if ( ! ret_type.is_equal( t_bool ) )
			{
				log_failure( "gen::def_operator: operator%s return type must be of type bool - %s", to_str( op ), ret_type.debug_str() );
				return OpValidateResult::Fail;
			}
			break;

		case LAnd :
		case LOr :
		case LEqual :
		case LNot :
		case Lesser :
		case Greater :
		case LesserEqual :
		case GreaterEqual :
			check_params();

			switch ( params_code->NumEntries )
			{
				case 1 :
					is_member_symbol = true;
					break;

				case 2 :
					break;

				default :
					log_failure(
					"gen::def_operator: operator%s recieved unexpected number of paramters recived %d instead of 1-2",
					to_str( op ),
					params_code->NumEntries
					);
					return OpValidateResult::Fail;
			}
			break;

		case Indirection :
		case AddressOf :
		case MemberOfPointer :
			if ( params_code && params_code->NumEntries > 1 )
			{
				log_failure(
				"gen::def_operator: operator%s recieved unexpected number of paramters recived %d instead of 0-1",
				to_str( op ),
				params_code->NumEntries
				);
				return OpValidateResult::Fail;
			}
			else
			{
				is_member_symbol = true;
			}
			break;

		case PtrToMemOfPtr :
			if ( params_code )
			{
				log_failure( "gen::def_operator: operator%s expects no paramters - %s", to_str( op ), params_code.debug_str() );
				return OpValidateResult::Fail;
			}
			break;

		case Subscript :
		case FunctionCall :
		case Comma :
			check_params();
			break;
#undef specs
	}

	return is_member_symbol ? OpValidateResult::Member : OpValidateResult::Global;
#undef check_params
#undef check_ret_type
#undef check_param_eq_ret
}

#pragma region Helper Marcos
// This snippet is used in nearly all the functions.
#define name_check( Context_, Name_ )                                                                      \
	{                                                                                                      \
		if ( Name_.Len <= 0 )                                                                              \
		{                                                                                                  \
			log_failure( "gen::" stringize( Context_ ) ": Invalid name length provided - %d", Name_.Len ); \
			return CodeInvalid;                                                                            \
		}                                                                                                  \
                                                                                                           \
		if ( Name_.Ptr == nullptr )                                                                        \
		{                                                                                                  \
			log_failure( "gen::" stringize( Context_ ) ": name is null" );                                 \
			return CodeInvalid;                                                                            \
		}                                                                                                  \
	}

#define null_check( Context_, Code_ )                                                             \
	if ( ! Code_ )                                                                                \
	{                                                                                             \
		log_failure( "gen::" stringize( Context_ ) ": " stringize( Code_ ) " provided is null" ); \
		return CodeInvalid;                                                                       \
	}

#define null_or_invalid_check( Context_, Code_ )                                                         \
	{                                                                                                    \
		if ( ! Code_ )                                                                                   \
		{                                                                                                \
			log_failure( "gen::" stringize( Context_ ) ": " stringize( Code_ ) " provided is null" );    \
			return CodeInvalid;                                                                          \
		}                                                                                                \
                                                                                                         \
		if ( Code_->is_invalid() )                                                                       \
		{                                                                                                \
			log_failure( "gen::" stringize( Context_ ) ": " stringize( Code_ ) " provided is invalid" ); \
			return CodeInvalid;                                                                          \
		}                                                                                                \
	}

#define not_implemented( Context_ )                             \
	log_failure( "gen::%s: This function is not implemented" ); \
	return CodeInvalid;
#pragma endregion Helper Marcos

/*
The implementaiton of the upfront constructors involves doing three things:
* Validate the arguments given to construct the intended type of AST is valid.
* Construct said AST type.
* Lock the AST (set to readonly) and return the valid object.

If any of the validation fails, it triggers a call to log_failure with as much info the give the user so that they can hopefully
identify the issue without having to debug too much (at least they can debug though...)

The largest of the functions is related to operator overload definitions.
The library validates a good protion of their form and thus the argument processing for is quite a bit.
*/
CodeAttributes def_attributes( StrC content )
{
	if ( content.Len <= 0 || content.Ptr == nullptr )
	{
		log_failure( "gen::def_attributes: Invalid attributes provided" );
		return CodeInvalid;
	}

	Code result     = make_code();
	result->Type    = ECode::PlatformAttributes;
	result->Name    = get_cached_string( content );
	result->Content = result->Name;

	return ( CodeAttributes )result;
}

CodeComment def_comment( StrC content )
{
	if ( content.Len <= 0 || content.Ptr == nullptr )
	{
		log_failure( "gen::def_comment: Invalid comment provided:" );
		return CodeInvalid;
	}

	static char line[ MaxCommentLineLength ];

	String      cmt_formatted = String::make_reserve( GlobalAllocator, kilobytes( 1 ) );
	char const* end           = content.Ptr + content.Len;
	char const* scanner       = content.Ptr;
	s32         curr          = 0;
	do
	{
		char const* next   = scanner;
		s32         length = 0;
		while ( next != end && scanner[ length ] != '\n' )
		{
			next = scanner + length;
			length++;
		}
		length++;

		str_copy( line, scanner, length );
		cmt_formatted.append_fmt( "//%.*s", length, line );
		mem_set( line, 0, MaxCommentLineLength );

		scanner += length;
	} while ( scanner <= end );

	if ( cmt_formatted.back() != '\n' )
		cmt_formatted.append( "\n" );

	Code result     = make_code();
	result->Type    = ECode::Comment;
	result->Name    = get_cached_string( cmt_formatted );
	result->Content = result->Name;

	cmt_formatted.free();

	return ( CodeComment )result;
}

CodeConstructor def_constructor( CodeParam params, Code initializer_list, Code body )
{
	using namespace ECode;

	if ( params && params->Type != Parameters )
	{
		log_failure( "gen::def_constructor: params must be of Parameters type - %s", params.debug_str() );
		return CodeInvalid;
	}

	CodeConstructor result = ( CodeConstructor )make_code();

	if ( params )
	{
		result->Params = params;
	}

	if ( initializer_list )
	{
		result->InitializerList = initializer_list;
	}

	if ( body )
	{
		switch ( body->Type )
		{
			case Function_Body :
			case Untyped :
				break;

			default :
				log_failure( "gen::def_constructor: body must be either of Function_Body or Untyped type - %s", body.debug_str() );
				return CodeInvalid;
		}

		result->Type = Constructor;
		result->Body = body;
	}
	else
	{
		result->Type = Constructor_Fwd;
	}

	return result;
}

CodeClass def_class(
StrC           name,
Code           body,
CodeType       parent,
AccessSpec     parent_access,
CodeAttributes attributes,
ModuleFlag     mflags,
CodeType*      interfaces,
s32            num_interfaces
)
{
	using namespace ECode;

	name_check( def_class, name );

	if ( attributes && attributes->Type != PlatformAttributes )
	{
		log_failure( "gen::def_class: attributes was not a 'PlatformAttributes' type: %s", attributes.debug_str() );
		return CodeInvalid;
	}

	if ( parent && ( parent->Type != Class || parent->Type != Struct || parent->Type != Typename || parent->Type != Untyped ) )
	{
		log_failure( "gen::def_class: parent provided is not type 'Class', 'Struct', 'Typeanme', or 'Untyped': %s", parent.debug_str() );
		return CodeInvalid;
	}

	CodeClass result    = ( CodeClass )make_code();
	result->Name        = get_cached_string( name );
	result->ModuleFlags = mflags;

	if ( body )
	{
		switch ( body->Type )
		{
			case Class_Body :
			case Untyped :
				break;

			default :
				log_failure( "gen::def_class: body must be either of Class_Body or Untyped type - %s", body.debug_str() );
				return CodeInvalid;
		}

		result->Type = Class;
		result->Body = body;
	}
	else
	{
		result->Type = Class_Fwd;
	}

	if ( attributes )
		result->Attributes = attributes;

	if ( parent )
	{
		result->ParentAccess = parent_access;
		result->ParentType   = parent;
	}

	if ( interfaces )
	{
		for ( s32 idx = 0; idx < num_interfaces; idx++ )
		{
			result.add_interface( interfaces[ idx ] );
		}
	}

	return result;
}

CodeDefine def_define( StrC name, StrC content )
{
	using namespace ECode;

	name_check( def_define, name );

	if ( content.Len <= 0 || content.Ptr == nullptr )
	{
		log_failure( "gen::def_define: Invalid value provided" );
		return CodeInvalid;
	}

	CodeDefine result = ( CodeDefine )make_code();
	result->Type      = Preprocess_Define;
	result->Name      = get_cached_string( name );
	result->Content   = get_cached_string( content );

	return result;
}

CodeDestructor def_destructor( Code body, CodeSpecifiers specifiers )
{
	using namespace ECode;

	if ( specifiers && specifiers->Type != Specifiers )
	{
		log_failure( "gen::def_destructor: specifiers was not a 'Specifiers' type: %s", specifiers.debug_str() );
		return CodeInvalid;
	}

	CodeDestructor result = ( CodeDestructor )make_code();

	if ( specifiers )
		result->Specs = specifiers;

	if ( body )
	{
		switch ( body->Type )
		{
			case Function_Body :
			case Untyped :
				break;

			default :
				log_failure( "gen::def_destructor: body must be either of Function_Body or Untyped type - %s", body.debug_str() );
				return CodeInvalid;
		}

		result->Type = Destructor;
		result->Body = body;
	}
	else
	{
		result->Type = Destructor_Fwd;
	}

	return result;
}

CodeEnum def_enum( StrC name, Code body, CodeType type, EnumT specifier, CodeAttributes attributes, ModuleFlag mflags )
{
	using namespace ECode;

	name_check( def_enum, name );

	if ( type && type->Type != Typename )
	{
		log_failure( "gen::def_enum: enum underlying type provided was not of type Typename: %s", type.debug_str() );
		return CodeInvalid;
	}

	if ( attributes && attributes->Type != PlatformAttributes )
	{
		log_failure( "gen::def_enum: attributes was not a 'PlatformAttributes' type: %s", attributes.debug_str() );
		return CodeInvalid;
	}

	CodeEnum result     = ( CodeEnum )make_code();
	result->Name        = get_cached_string( name );
	result->ModuleFlags = mflags;

	if ( body )
	{
		switch ( body->Type )
		{
			case Enum_Body :
			case Untyped :
				break;

			default :
				log_failure( "gen::def_enum: body must be of Enum_Body or Untyped type %s", body.debug_str() );
				return CodeInvalid;
		}

		result->Type = specifier == EnumClass ? Enum_Class : Enum;

		result->Body = body;
	}
	else
	{
		result->Type = specifier == EnumClass ? Enum_Class_Fwd : Enum_Fwd;
	}

	if ( attributes )
		result->Attributes = attributes;

	if ( type )
	{
		result->UnderlyingType = type;
	}
	else if ( result->Type != Enum_Class_Fwd && result->Type != Enum_Fwd )
	{
		log_failure( "gen::def_enum: enum forward declaration must have an underlying type" );
		return CodeInvalid;
	}

	return result;
}

CodeExec def_execution( StrC content )
{
	if ( content.Len <= 0 || content.Ptr == nullptr )
	{
		log_failure( "gen::def_execution: Invalid execution provided" );
		return CodeInvalid;
	}

	Code result     = make_code();
	result->Type    = ECode::Execution;
	result->Name    = get_cached_string( content );
	result->Content = result->Name;

	return ( CodeExec )result;
}

CodeExtern def_extern_link( StrC name, Code body )
{
	using namespace ECode;

	name_check( def_extern_linkage, name );
	null_check( def_extern_linkage, body );

	if ( body->Type != Extern_Linkage_Body && body->Type != Untyped )
	{
		log_failure( "gen::def_extern_linkage: body is not of extern_linkage or untyped type %s", body->debug_str() );
		return CodeInvalid;
	}

	CodeExtern result = ( CodeExtern )make_code();
	result->Type      = Extern_Linkage;
	result->Name      = get_cached_string( name );
	result->Body      = body;

	return ( CodeExtern )result;
}

CodeFriend def_friend( Code declaration )
{
	using namespace ECode;

	null_check( def_friend, declaration );

	switch ( declaration->Type )
	{
		case Class_Fwd :
		case Function_Fwd :
		case Operator_Fwd :
		case Struct_Fwd :
		case Class :
		case Function :
		case Operator :
		case Struct :
			break;

		default :
			log_failure( "gen::def_friend: requires declartion to have class, function, operator, or struct - %s", declaration->debug_str() );
			return CodeInvalid;
	}

	CodeFriend result   = ( CodeFriend )make_code();
	result->Type        = Friend;

	result->Declaration = declaration;

	return result;
}

CodeFn def_function( StrC name, CodeParam params, CodeType ret_type, Code body, CodeSpecifiers specifiers, CodeAttributes attributes, ModuleFlag mflags )
{
	using namespace ECode;

	name_check( def_function, name );

	if ( params && params->Type != Parameters )
	{
		log_failure( "gen::def_function: params was not a `Parameters` type: %s", params.debug_str() );
		return CodeInvalid;
	}

	if ( ret_type && ret_type->Type != Typename )
	{
		log_failure( "gen::def_function: ret_type was not a Typename: %s", ret_type.debug_str() );
		return CodeInvalid;
	}

	if ( specifiers && specifiers->Type != Specifiers )
	{
		log_failure( "gen::def_function: specifiers was not a `Specifiers` type: %s", specifiers.debug_str() );
		return CodeInvalid;
	}

	if ( attributes && attributes->Type != PlatformAttributes )
	{
		log_failure( "gen::def_function: attributes was not a `PlatformAttributes` type: %s", attributes.debug_str() );
		return CodeInvalid;
	}

	CodeFn result       = ( CodeFn )make_code();
	result->Name        = get_cached_string( name );
	result->ModuleFlags = mflags;

	if ( body )
	{
		switch ( body->Type )
		{
			case Function_Body :
			case Execution :
			case Untyped :
				break;

			default :
			{
				log_failure( "gen::def_function: body must be either of Function_Body, Execution, or Untyped type. %s", body->debug_str() );
				return CodeInvalid;
			}
		}

		result->Type = Function;
		result->Body = body;
	}
	else
	{
		result->Type = Function_Fwd;
	}

	if ( attributes )
		result->Attributes = attributes;

	if ( specifiers )
		result->Specs = specifiers;

	if ( ret_type )
	{
		result->ReturnType = ret_type;
	}
	else
	{
		result->ReturnType = t_void;
	}

	if ( params )
		result->Params = params;

	return result;
}

CodeInclude def_include( StrC path, bool foreign )
{
	if ( path.Len <= 0 || path.Ptr == nullptr )
	{
		log_failure( "gen::def_include: Invalid path provided - %d" );
		return CodeInvalid;
	}

	StrC content    = foreign ? to_str( str_fmt_buf( "<%.*s>", path.Len, path.Ptr ) ) : to_str( str_fmt_buf( "\"%.*s\"", path.Len, path.Ptr ) );

	Code result     = make_code();
	result->Type    = ECode::Preprocess_Include;
	result->Name    = get_cached_string( content );
	result->Content = result->Name;

	return ( CodeInclude )result;
}

CodeModule def_module( StrC name, ModuleFlag mflags )
{
	name_check( def_module, name );

	Code result         = make_code();
	result->Type        = ECode::Module;
	result->Name        = get_cached_string( name );
	result->Content     = result->Name;
	result->ModuleFlags = mflags;

	return ( CodeModule )result;
}

CodeNS def_namespace( StrC name, Code body, ModuleFlag mflags )
{
	using namespace ECode;

	name_check( def_namespace, name );
	null_check( def_namespace, body );

	if ( body->Type != Namespace_Body && body->Type != Untyped )
	{
		log_failure( "gen::def_namespace: body is not of namespace or untyped type %s", body.debug_str() );
		return CodeInvalid;
	}

	CodeNS result       = ( CodeNS )make_code();
	result->Type        = Namespace;
	result->Name        = get_cached_string( name );
	result->ModuleFlags = mflags;
	result->Body        = body;

	return result;
}

CodeOperator def_operator(
OperatorT      op,
StrC           nspace,
CodeParam      params_code,
CodeType       ret_type,
Code           body,
CodeSpecifiers specifiers,
CodeAttributes attributes,
ModuleFlag     mflags
)
{
	using namespace ECode;

	if ( attributes && attributes->Type != PlatformAttributes )
	{
		log_failure( "gen::def_operator: PlatformAttributes was provided but its not of attributes type: %s", attributes.debug_str() );
		return CodeInvalid;
	}

	if ( specifiers && specifiers->Type != Specifiers )
	{
		log_failure( "gen::def_operator: Specifiers was provided but its not of specifiers type: %s", specifiers.debug_str() );
		return CodeInvalid;
	}

	OpValidateResult check_result = operator__validate( op, params_code, ret_type, specifiers );

	if ( check_result == OpValidateResult::Fail )
	{
		return CodeInvalid;
	}

	char const* name = nullptr;

	StrC op_str      = to_str( op );
	if ( nspace.Len > 0 )
		name = str_fmt_buf( "%.*soperator %.*s", nspace.Len, nspace.Ptr, op_str.Len, op_str.Ptr );
	else
		name = str_fmt_buf( "operator %.*s", op_str.Len, op_str.Ptr );
	CodeOperator result = ( CodeOperator )make_code();
	result->Name        = get_cached_string( { str_len( name ), name } );
	result->ModuleFlags = mflags;

	if ( body )
	{
		switch ( body->Type )
		{
			case Function_Body :
			case Execution :
			case Untyped :
				break;

			default :
			{
				log_failure( "gen::def_operator: body must be either of Function_Body, Execution, or Untyped type. %s", body->debug_str() );
				return CodeInvalid;
			}
		}

		result->Type = check_result == OpValidateResult::Global ? Operator : Operator_Member;

		result->Body = body;
	}
	else
	{
		result->Type = check_result == OpValidateResult::Global ? Operator_Fwd : Operator_Member_Fwd;
	}

	if ( attributes )
		result->Attributes = attributes;

	if ( specifiers )
		result->Specs = specifiers;

	result->ReturnType = ret_type;

	if ( params_code )
		result->Params = params_code;

	return result;
}

CodeOpCast def_operator_cast( CodeType type, Code body, CodeSpecifiers const_spec )
{
	using namespace ECode;
	null_check( def_operator_cast, type );

	if ( type->Type != Typename )
	{
		log_failure( "gen::def_operator_cast: type is not a typename - %s", type.debug_str() );
		return CodeInvalid;
	}

	CodeOpCast result = ( CodeOpCast )make_code();

	if ( body )
	{
		result->Type = Operator_Cast;

		if ( body->Type != Function_Body && body->Type != Execution )
		{
			log_failure( "gen::def_operator_cast: body is not of function body or execution type - %s", body.debug_str() );
			return CodeInvalid;
		}

		result->Body = body;
	}
	else
	{
		result->Type = Operator_Cast_Fwd;
	}

	if ( const_spec )
	{
		result->Specs = const_spec;
	}

	result->ValueType = type;
	return result;
}

CodeParam def_param( CodeType type, StrC name, Code value )
{
	using namespace ECode;

	name_check( def_param, name );
	null_check( def_param, type );

	if ( type->Type != Typename )
	{
		log_failure( "gen::def_param: type is not a typename - %s", type.debug_str() );
		return CodeInvalid;
	}

	if ( value && value->Type != Untyped )
	{
		log_failure( "gen::def_param: value is not untyped - %s", value.debug_str() );
		return CodeInvalid;
	}

	CodeParam result  = ( CodeParam )make_code();
	result->Type      = Parameters;
	result->Name      = get_cached_string( name );

	result->ValueType = type;

	if ( value )
		result->Value = value;

	result->NumEntries++;

	return result;
}

CodePragma def_pragma( StrC directive )
{
	using namespace ECode;

	if ( directive.Len <= 0 || directive.Ptr == nullptr )
	{
		log_failure( "gen::def_comment: Invalid comment provided:" );
		return CodeInvalid;
	}

	CodePragma result = ( CodePragma )make_code();
	result->Type      = Preprocess_Pragma;
	result->Content   = get_cached_string( directive );

	return result;
}

CodePreprocessCond def_preprocess_cond( EPreprocessCond type, StrC expr )
{
	using namespace ECode;

	if ( expr.Len <= 0 || expr.Ptr == nullptr )
	{
		log_failure( "gen::def_comment: Invalid comment provided:" );
		return CodeInvalid;
	}

	CodePreprocessCond result = ( CodePreprocessCond )make_code();
	result->Content           = get_cached_string( expr );

	switch ( type )
	{
		case EPreprocessCond::If :
			result->Type = Preprocess_If;
			break;
		case EPreprocessCond::IfDef :
			result->Type = Preprocess_IfDef;
			break;
		case EPreprocessCond::IfNotDef :
			result->Type = Preprocess_IfNotDef;
			break;
		case EPreprocessCond::ElIf :
			result->Type = Preprocess_ElIf;
			break;
	}

	return result;
}

CodeSpecifiers def_specifier( SpecifierT spec )
{
	CodeSpecifiers result = ( CodeSpecifiers )make_code();
	result->Type          = ECode::Specifiers;
	result.append( spec );

	return result;
}

CodeStruct def_struct(
StrC           name,
Code           body,
CodeType       parent,
AccessSpec     parent_access,
CodeAttributes attributes,
ModuleFlag     mflags,
CodeType*      interfaces,
s32            num_interfaces
)
{
	using namespace ECode;

	if ( attributes && attributes->Type != PlatformAttributes )
	{
		log_failure( "gen::def_struct: attributes was not a `PlatformAttributes` type - %s", attributes.debug_str() );
		return CodeInvalid;
	}

	if ( parent && parent->Type != Typename )
	{
		log_failure( "gen::def_struct: parent was not a `Struct` type - %s", parent.debug_str() );
		return CodeInvalid;
	}

	if ( body && body->Type != Struct_Body )
	{
		log_failure( "gen::def_struct: body was not a Struct_Body type - %s", body.debug_str() );
		return CodeInvalid;
	}

	CodeStruct result   = ( CodeStruct )make_code();
	result->ModuleFlags = mflags;

	if ( name )
		result->Name = get_cached_string( name );

	if ( body )
	{
		result->Type = Struct;
		result->Body = body;
	}
	else
	{
		result->Type = Struct_Fwd;
	}

	if ( attributes )
		result->Attributes = attributes;

	if ( parent )
	{
		result->ParentAccess = parent_access;
		result->ParentType   = parent;
	}

	if ( interfaces )
	{
		for ( s32 idx = 0; idx < num_interfaces; idx++ )
		{
			result.add_interface( interfaces[ idx ] );
		}
	}

	return result;
}

CodeTemplate def_template( CodeParam params, Code declaration, ModuleFlag mflags )
{
	null_check( def_template, declaration );

	if ( params && params->Type != ECode::Parameters )
	{
		log_failure( "gen::def_template: params is not of parameters type - %s", params.debug_str() );
		return CodeInvalid;
	}

	switch ( declaration->Type )
	{
		case ECode::Class :
		case ECode::Function :
		case ECode::Struct :
		case ECode::Variable :
		case ECode::Using :
			break;

		default :
			log_failure( "gen::def_template: declaration is not of class, function, struct, variable, or using type - %s", declaration.debug_str() );
	}

	CodeTemplate result = ( CodeTemplate )make_code();
	result->Type        = ECode::Template;
	result->ModuleFlags = mflags;
	result->Params      = params;
	result->Declaration = declaration;

	return result;
}

CodeType def_type( StrC name, Code arrayexpr, CodeSpecifiers specifiers, CodeAttributes attributes )
{
	name_check( def_type, name );

	if ( attributes && attributes->Type != ECode::PlatformAttributes )
	{
		log_failure( "gen::def_type: attributes is not of attributes type - %s", attributes.debug_str() );
		return CodeInvalid;
	}

	if ( specifiers && specifiers->Type != ECode::Specifiers )
	{
		log_failure( "gen::def_type: specifiers is not of specifiers type - %s", specifiers.debug_str() );
		return CodeInvalid;
	}

	if ( arrayexpr && arrayexpr->Type != ECode::Untyped )
	{
		log_failure( "gen::def_type: arrayexpr is not of untyped type - %s", arrayexpr->debug_str() );
		return CodeInvalid;
	}

	CodeType result = ( CodeType )make_code();
	result->Name    = get_cached_string( name );
	result->Type    = ECode::Typename;

	if ( attributes )
		result->Attributes = attributes;

	if ( specifiers )
		result->Specs = specifiers;

	if ( arrayexpr )
		result->ArrExpr = arrayexpr;

	return result;
}

CodeTypedef def_typedef( StrC name, Code type, CodeAttributes attributes, ModuleFlag mflags )
{
	using namespace ECode;

	null_check( def_typedef, type );

	switch ( type->Type )
	{
		case Class :
		case Class_Fwd :
		case Enum :
		case Enum_Fwd :
		case Enum_Class :
		case Enum_Class_Fwd :
		case Function_Fwd :
		case Struct :
		case Struct_Fwd :
		case Union :
		case Typename :
			break;
		default :
			log_failure( "gen::def_typedef: type was not a Class, Enum, Function Forward, Struct, Typename, or Union - %s", type.debug_str() );
			return CodeInvalid;
	}

	if ( attributes && attributes->Type != ECode::PlatformAttributes )
	{
		log_failure( "gen::def_typedef: attributes was not a PlatformAttributes - %s", attributes.debug_str() );
		return CodeInvalid;
	}

	// Registering the type.
	Code registered_type = def_type( name );

	if ( ! registered_type )
	{
		log_failure( "gen::def_typedef: failed to register type" );
		return CodeInvalid;
	}

	CodeTypedef result     = ( CodeTypedef )make_code();
	result->Type           = ECode::Typedef;
	result->ModuleFlags    = mflags;

	result->UnderlyingType = type;

	if ( name.Len <= 0 )
	{
		if ( type->Type != Untyped )
		{
			log_failure( "gen::def_typedef: name was empty and type was not untyped (indicating its a function typedef) - %s", type.debug_str() );
			return CodeInvalid;
		}

		result->Name       = get_cached_string( type->Name );
		result->IsFunction = true;
	}
	else
	{
		result->Name       = get_cached_string( name );
		result->IsFunction = false;
	}

	return result;
}

CodeUnion def_union( StrC name, Code body, CodeAttributes attributes, ModuleFlag mflags )
{
	null_check( def_union, body );

	if ( body->Type != ECode::Union_Body )
	{
		log_failure( "gen::def_union: body was not a Union_Body type - %s", body.debug_str() );
		return CodeInvalid;
	}

	if ( attributes && attributes->Type != ECode::PlatformAttributes )
	{
		log_failure( "gen::def_union: attributes was not a PlatformAttributes type - %s", attributes.debug_str() );
		return CodeInvalid;
	}

	CodeUnion result    = ( CodeUnion )make_code();
	result->ModuleFlags = mflags;
	result->Type        = ECode::Union;

	if ( name.Ptr )
		result->Name = get_cached_string( name );

	result->Body = body;

	if ( attributes )
		result->Attributes = attributes;

	return result;
}

CodeUsing def_using( StrC name, CodeType type, CodeAttributes attributes, ModuleFlag mflags )
{
	name_check( def_using, name );
	null_check( def_using, type );

	Code register_type = def_type( name );

	if ( ! register_type )
	{
		log_failure( "gen::def_using: failed to register type" );
		return CodeInvalid;
	}

	if ( attributes && attributes->Type != ECode::PlatformAttributes )
	{
		log_failure( "gen::def_using: attributes was not a PlatformAttributes type - %s", attributes.debug_str() );
		return CodeInvalid;
	}

	CodeUsing result       = ( CodeUsing )make_code();
	result->Name           = get_cached_string( name );
	result->ModuleFlags    = mflags;
	result->Type           = ECode::Using;

	result->UnderlyingType = type;

	if ( attributes )
		result->Attributes = attributes;

	return result;
}

CodeUsing def_using_namespace( StrC name )
{
	name_check( def_using_namespace, name );

	Code result     = make_code();
	result->Name    = get_cached_string( name );
	result->Content = result->Name;
	result->Type    = ECode::Using_Namespace;

	return ( CodeUsing )result;
}

CodeVar def_variable( CodeType type, StrC name, Code value, CodeSpecifiers specifiers, CodeAttributes attributes, ModuleFlag mflags )
{
	name_check( def_variable, name );
	null_check( def_variable, type );

	if ( attributes && attributes->Type != ECode::PlatformAttributes )
	{
		log_failure( "gen::def_variable: attributes was not a `PlatformAttributes` type - %s", attributes.debug_str() );
		return CodeInvalid;
	}

	if ( specifiers && specifiers->Type != ECode::Specifiers )
	{
		log_failure( "gen::def_variable: specifiers was not a `Specifiers` type - %s", specifiers.debug_str() );
		return CodeInvalid;
	}

	if ( type->Type != ECode::Typename )
	{
		log_failure( "gen::def_variable: type was not a Typename - %s", type.debug_str() );
		return CodeInvalid;
	}

	if ( value && value->Type != ECode::Untyped )
	{
		log_failure( "gen::def_variable: value was not a `Untyped` type - %s", value.debug_str() );
		return CodeInvalid;
	}

	CodeVar result      = ( CodeVar )make_code();
	result->Name        = get_cached_string( name );
	result->Type        = ECode::Variable;
	result->ModuleFlags = mflags;

	result->ValueType   = type;

	if ( attributes )
		result->Attributes = attributes;

	if ( specifiers )
		result->Specs = specifiers;

	if ( value )
		result->Value = value;

	return result;
}

#pragma region Helper Macros for def_**_body functions
#define def_body_start( Name_ )                                                       \
	using namespace ECode;                                                            \
                                                                                      \
	if ( num <= 0 )                                                                   \
	{                                                                                 \
		log_failure( "gen::" stringize( Name_ ) ": num cannot be zero or negative" ); \
		return CodeInvalid;                                                           \
	}

#define def_body_code_array_start( Name_ )                                             \
	using namespace ECode;                                                             \
                                                                                       \
	if ( num <= 0 )                                                                    \
	{                                                                                  \
		log_failure( "gen::" stringize( Name_ ) ": num cannot be zero or negative" );  \
		return CodeInvalid;                                                            \
	}                                                                                  \
                                                                                       \
	if ( codes == nullptr )                                                            \
	{                                                                                  \
		log_failure( "gen::" stringize( Name_ ) " : Provided a null array of codes" ); \
		return CodeInvalid;                                                            \
	}

#pragma endregion Helper Macros for def_** _body functions

CodeBody def_class_body( s32 num, ... )
{
	def_body_start( def_class_body );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Class_Body;

	va_list va;
	va_start( va, num );
	do
	{
		Code_POD pod   = va_arg( va, Code_POD );
		Code     entry = pcast( Code, pod );

		if ( ! entry )
		{
			log_failure(
			"gen::"
			"def_class_body"
			": Provided an null entry"
			);
			return CodeInvalid;
		}

		switch ( entry->Type )
		{
			GEN_AST_BODY_CLASS_UNALLOWED_TYPES
			log_failure(
			"gen::"
			"def_class_body"
			": Entry type is not allowed: %s",
			entry.debug_str()
			);
			return CodeInvalid;

			default :
				break;
		}

		result.append( entry );
	} while ( num--, num > 0 );
	va_end( va );

	return result;
}

CodeBody def_class_body( s32 num, Code* codes )
{
	def_body_code_array_start( def_class_body );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Function_Body;

	do
	{
		Code entry = *codes;
		codes++;

		if ( ! entry )
		{
			log_failure(
			"gen::"
			"def_class_body"
			": Provided an null entry"
			);
			return CodeInvalid;
		}

		switch ( entry->Type )
		{
			GEN_AST_BODY_CLASS_UNALLOWED_TYPES
			log_failure(
			"gen::"
			"def_class_body"
			": Entry type is not allowed: %s",
			entry.debug_str()
			);
			return CodeInvalid;

			default :
				break;
		}

		result.append( entry );
	} while ( num--, num > 0 );

	return result;
}

CodeBody def_enum_body( s32 num, ... )
{
	def_body_start( def_enum_body );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Enum_Body;

	va_list va;
	va_start( va, num );
	do
	{
		Code_POD pod   = va_arg( va, Code_POD );
		Code     entry = pcast( Code, pod );

		if ( ! entry )
		{
			log_failure( "gen::def_enum_body: Provided a null entry" );
			return CodeInvalid;
		}

		if ( entry->Type != Untyped && entry->Type != Comment )
		{
			log_failure( "gen::def_enum_body: Entry type is not allowed - %s. Must be of untyped or comment type.", entry.debug_str() );
			return CodeInvalid;
		}

		result.append( entry );
	} while ( num--, num > 0 );
	va_end( va );

	return ( CodeBody )result;
}

CodeBody def_enum_body( s32 num, Code* codes )
{
	def_body_code_array_start( def_enum_body );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Enum_Body;

	do
	{
		Code entry = *codes;

		if ( ! entry )
		{
			log_failure( "gen::def_enum_body: Provided a null entry" );
			return CodeInvalid;
		}

		if ( entry->Type != Untyped && entry->Type != Comment )
		{
			log_failure( "gen::def_enum_body: Entry type is not allowed: %s", entry.debug_str() );
			return CodeInvalid;
		}

		result.append( entry );
	} while ( codes++, num--, num > 0 );

	return result;
}

CodeBody def_export_body( s32 num, ... )
{
	def_body_start( def_export_body );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Export_Body;

	va_list va;
	va_start( va, num );
	do
	{
		Code_POD pod   = va_arg( va, Code_POD );
		Code     entry = pcast( Code, pod );

		if ( ! entry )
		{
			log_failure(
			"gen::"
			"def_export_body"
			": Provided an null entry"
			);
			return CodeInvalid;
		}

		switch ( entry->Type )
		{
			GEN_AST_BODY_EXPORT_UNALLOWED_TYPES
			log_failure(
			"gen::"
			"def_export_body"
			": Entry type is not allowed: %s",
			entry.debug_str()
			);
			return CodeInvalid;

			default :
				break;
		}

		result.append( entry );
	} while ( num--, num > 0 );
	va_end( va );

	return result;
}

CodeBody def_export_body( s32 num, Code* codes )
{
	def_body_code_array_start( def_export_body );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Export_Body;

	do
	{
		Code entry = *codes;
		codes++;

		if ( ! entry )
		{
			log_failure(
			"gen::"
			"def_export_body"
			": Provided an null entry"
			);
			return CodeInvalid;
		}

		switch ( entry->Type )
		{
			GEN_AST_BODY_EXPORT_UNALLOWED_TYPES
			log_failure(
			"gen::"
			"def_export_body"
			": Entry type is not allowed: %s",
			entry.debug_str()
			);
			return CodeInvalid;

			default :
				break;
		}

		result.append( entry );
	} while ( num--, num > 0 );

	return result;
}

CodeBody def_extern_link_body( s32 num, ... )
{
	def_body_start( def_extern_linkage_body );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Extern_Linkage_Body;

	va_list va;
	va_start( va, num );
	do
	{
		Code_POD pod   = va_arg( va, Code_POD );
		Code     entry = pcast( Code, pod );

		if ( ! entry )
		{
			log_failure(
			"gen::"
			"def_extern_linkage_body"
			": Provided an null entry"
			);
			return CodeInvalid;
		}

		switch ( entry->Type )
		{
			GEN_AST_BODY_EXTERN_LINKAGE_UNALLOWED_TYPES
			log_failure(
			"gen::"
			"def_extern_linkage_body"
			": Entry type is not allowed: %s",
			entry.debug_str()
			);
			return CodeInvalid;

			default :
				break;
		}

		result.append( entry );
	} while ( num--, num > 0 );
	va_end( va );

	return result;
}

CodeBody def_extern_link_body( s32 num, Code* codes )
{
	def_body_code_array_start( def_extern_linkage_body );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Extern_Linkage_Body;

	do
	{
		Code entry = *codes;
		codes++;

		if ( ! entry )
		{
			log_failure(
			"gen::"
			"def_extern_linkage_body"
			": Provided an null entry"
			);
			return CodeInvalid;
		}

		switch ( entry->Type )
		{
			GEN_AST_BODY_EXTERN_LINKAGE_UNALLOWED_TYPES
			log_failure(
			"gen::"
			"def_extern_linkage_body"
			": Entry type is not allowed: %s",
			entry.debug_str()
			);
			return CodeInvalid;

			default :
				break;
		}

		result.append( entry );

	} while ( num--, num > 0 );

	return result;
}

CodeBody def_function_body( s32 num, ... )
{
	def_body_start( def_function_body );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Function_Body;

	va_list va;
	va_start( va, num );
	do
	{
		Code_POD pod   = va_arg( va, Code_POD );
		Code     entry = pcast( Code, pod );

		if ( ! entry )
		{
			log_failure( "gen::" stringize( def_function_body ) ": Provided an null entry" );
			return CodeInvalid;
		}

		switch ( entry->Type )
		{

			GEN_AST_BODY_FUNCTION_UNALLOWED_TYPES
			log_failure( "gen::" stringize( def_function_body ) ": Entry type is not allowed: %s", entry.debug_str() );
			return CodeInvalid;

			default :
				break;
		}

		result.append( entry );
	} while ( num--, num > 0 );
	va_end( va );

	return result;
}

CodeBody def_function_body( s32 num, Code* codes )
{
	def_body_code_array_start( def_function_body );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Function_Body;

	do
	{
		Code entry = *codes;
		codes++;

		if ( ! entry )
		{
			log_failure(
			"gen::"
			"def_function_body"
			": Provided an null entry"
			);
			return CodeInvalid;
		}

		switch ( entry->Type )
		{
			GEN_AST_BODY_FUNCTION_UNALLOWED_TYPES
			log_failure(
			"gen::"
			"def_function_body"
			": Entry type is not allowed: %s",
			entry.debug_str()
			);
			return CodeInvalid;

			default :
				break;
		}
		result.append( entry );
	} while ( num--, num > 0 );

	return result;
}

CodeBody def_global_body( s32 num, ... )
{
	def_body_start( def_global_body );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Global_Body;

	va_list va;
	va_start( va, num );
	do
	{
		Code_POD pod   = va_arg( va, Code_POD );
		Code     entry = pcast( Code, pod );

		if ( ! entry )
		{
			log_failure(
			"gen::"
			"def_global_body"
			": Provided an null entry"
			);
			return CodeInvalid;
		}

		switch ( entry->Type )
		{
			case Global_Body :
				result.append( entry.cast< CodeBody >() );
				continue;

				GEN_AST_BODY_GLOBAL_UNALLOWED_TYPES
				log_failure(
				"gen::"
				"def_global_body"
				": Entry type is not allowed: %s",
				entry.debug_str()
				);
				return ( *Code::Invalid.ast );

			default :
				break;
		}

		result.append( entry );
	} while ( num--, num > 0 );
	va_end( va );

	return result;
}

CodeBody def_global_body( s32 num, Code* codes )
{
	def_body_code_array_start( def_global_body );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Global_Body;

	do
	{
		Code entry = *codes;
		codes++;

		if ( ! entry )
		{
			log_failure(
			"gen::"
			"def_global_body"
			": Provided an null entry"
			);
			return CodeInvalid;
		}

		switch ( entry->Type )
		{
			case Global_Body :
				result.append( entry.cast< CodeBody >() );
				continue;

				GEN_AST_BODY_GLOBAL_UNALLOWED_TYPES
				log_failure(
				"gen::"
				"def_global_body"
				": Entry type is not allowed: %s",
				entry.debug_str()
				);
				return CodeInvalid;

			default :
				break;
		}

		result.append( entry );
	} while ( num--, num > 0 );

	return result;
}

CodeBody def_namespace_body( s32 num, ... )
{
	def_body_start( def_namespace_body );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Namespace_Body;

	va_list va;
	va_start( va, num );
	do
	{
		Code_POD pod   = va_arg( va, Code_POD );
		Code     entry = pcast( Code, pod );

		if ( ! entry )
		{
			log_failure(
			"gen::"
			"def_namespace_body"
			": Provided an null entry"
			);
			return CodeInvalid;
		}

		switch ( entry->Type )
		{
			GEN_AST_BODY_NAMESPACE_UNALLOWED_TYPES
			log_failure(
			"gen::"
			"def_namespace_body"
			": Entry type is not allowed: %s",
			entry.debug_str()
			);
			return CodeInvalid;

			default :
				break;
		}

		result.append( entry );
	} while ( num--, num > 0 );
	va_end( va );

	return result;
}

CodeBody def_namespace_body( s32 num, Code* codes )
{
	def_body_code_array_start( def_namespace_body );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Global_Body;

	do
	{
		Code entry = *codes;
		codes++;

		if ( ! entry )
		{
			log_failure(
			"gen::"
			"def_namespace_body"
			": Provided an null entry"
			);
			return CodeInvalid;
		}

		switch ( entry->Type )
		{
			GEN_AST_BODY_NAMESPACE_UNALLOWED_TYPES
			log_failure(
			"gen::"
			"def_namespace_body"
			": Entry type is not allowed: %s",
			entry.debug_str()
			);
			return CodeInvalid;

			default :
				break;
		}

		result.append( entry );
	} while ( num--, num > 0 );

	return result;
}

CodeParam def_params( s32 num, ... )
{
	def_body_start( def_params );

	va_list va;
	va_start( va, num );

	Code_POD  pod   = va_arg( va, Code_POD );
	CodeParam param = pcast( CodeParam, pod );

	null_check( def_params, param );

	if ( param->Type != Parameters )
	{
		log_failure( "gen::def_params: param %d is not a Parameters", num - num + 1 );
		return CodeInvalid;
	}

	CodeParam result = ( CodeParam )param.duplicate();

	while ( --num )
	{
		pod   = va_arg( va, Code_POD );
		param = pcast( CodeParam, pod );

		if ( param->Type != Parameters )
		{
			log_failure( "gen::def_params: param %d is not a Parameters", num - num + 1 );
			return CodeInvalid;
		}

		result.append( param );
	}
	va_end( va );

	return result;
}

CodeParam def_params( s32 num, CodeParam* codes )
{
	def_body_code_array_start( def_params );

#define check_current()                                                                                         \
	if ( current.ast == nullptr )                                                                               \
	{                                                                                                           \
		log_failure( "gen::def_params: Provide a null code in codes array" );                                   \
		return CodeInvalid;                                                                                     \
	}                                                                                                           \
                                                                                                                \
	if ( current->Type != Parameters )                                                                          \
	{                                                                                                           \
		log_failure( "gen::def_params: Code in coes array is not of paramter type - %s", current.debug_str() ); \
		return CodeInvalid;                                                                                     \
	}

	CodeParam current = ( CodeParam )codes->duplicate();
	check_current();

	CodeParam result  = ( CodeParam )make_code();
	result->Name      = current->Name;
	result->Type      = current->Type;
	result->ValueType = current->ValueType;

	while ( codes++, current = *codes, num--, num > 0 )
	{
		check_current();
		result.append( current );
	}
#undef check_current

	return result;
}

CodeSpecifiers def_specifiers( s32 num, ... )
{
	if ( num <= 0 )
	{
		log_failure( "gen::def_specifiers: num cannot be zero or less" );
		return CodeInvalid;
	}

	if ( num > AST::ArrSpecs_Cap )
	{
		log_failure( "gen::def_specifiers: num of speciifers to define AST larger than AST specicifier capacity - %d", num );
		return CodeInvalid;
	}

	CodeSpecifiers result = ( CodeSpecifiers )make_code();
	result->Type          = ECode::Specifiers;

	va_list va;
	va_start( va, num );
	do
	{
		SpecifierT type = ( SpecifierT )va_arg( va, int );

		result.append( type );
	} while ( --num, num );
	va_end( va );

	return result;
}

CodeSpecifiers def_specifiers( s32 num, SpecifierT* specs )
{
	if ( num <= 0 )
	{
		log_failure( "gen::def_specifiers: num cannot be zero or less" );
		return CodeInvalid;
	}

	if ( num > AST::ArrSpecs_Cap )
	{
		log_failure( "gen::def_specifiers: num of speciifers to define AST larger than AST specicifier capacity - %d", num );
		return CodeInvalid;
	}

	CodeSpecifiers result = ( CodeSpecifiers )make_code();
	result->Type          = ECode::Specifiers;

	s32 idx               = 0;
	do
	{
		result.append( specs[ idx ] );
		idx++;
	} while ( --num, num );

	return result;
}

CodeBody def_struct_body( s32 num, ... )
{
	def_body_start( def_struct_body );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Struct_Body;

	va_list va;
	va_start( va, num );
	do
	{
		Code_POD pod   = va_arg( va, Code_POD );
		Code     entry = pcast( Code, pod );

		if ( ! entry )
		{
			log_failure(
			"gen::"
			"def_struct_body"
			": Provided an null entry"
			);
			return CodeInvalid;
		}

		switch ( entry->Type )
		{
			GEN_AST_BODY_STRUCT_UNALLOWED_TYPES
			log_failure(
			"gen::"
			"def_struct_body"
			": Entry type is not allowed: %s",
			entry.debug_str()
			);
			return CodeInvalid;

			default :
				break;
		}

		result.append( entry );
	} while ( num--, num > 0 );
	va_end( va );

	return result;
}

CodeBody def_struct_body( s32 num, Code* codes )
{
	def_body_code_array_start( def_struct_body );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Struct_Body;

	do
	{
		Code entry = *codes;
		codes++;

		if ( ! entry )
		{
			log_failure(
			"gen::"
			"def_struct_body"
			": Provided an null entry"
			);
			return CodeInvalid;
		}

		switch ( entry->Type )
		{
			GEN_AST_BODY_STRUCT_UNALLOWED_TYPES
			log_failure(
			"gen::"
			"def_struct_body"
			": Entry type is not allowed: %s",
			entry.debug_str()
			);
			return CodeInvalid;

			default :
				break;
		}

		result.append( entry );
	} while ( num--, num > 0 );

	return result;
}

CodeBody def_union_body( s32 num, ... )
{
	def_body_start( def_union_body );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Union_Body;

	va_list va;
	va_start( va, num );
	do
	{
		Code_POD pod   = va_arg( va, Code_POD );
		Code     entry = pcast( Code, pod );

		if ( ! entry )
		{
			log_failure( "gen::def_union_body: Provided a null entry" );
			return CodeInvalid;
		}

		if ( entry->Type != Untyped && entry->Type != Comment )
		{
			log_failure( "gen::def_union_body: Entry type is not allowed - %s. Must be of untyped or comment type.", entry.debug_str() );
			return CodeInvalid;
		}

		result.append( entry );
	} while ( num--, num > 0 );
	va_end( va );

	return result;
}

CodeBody def_union_body( s32 num, CodeUnion* codes )
{
	def_body_code_array_start( def_union_body );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Union_Body;

	do
	{
		Code entry = *codes;

		if ( ! entry )
		{
			log_failure( "gen::def_union_body: Provided a null entry" );
			return CodeInvalid;
		}

		if ( entry->Type != Untyped && entry->Type != Comment )
		{
			log_failure( "gen::def_union_body: Entry type is not allowed: %s", entry.debug_str() );
			return CodeInvalid;
		}

		result.append( entry );
	} while ( codes++, num--, num > 0 );

	return ( CodeBody )result;
}

#undef name_check
#undef null_check
#undef null_or_invalid_check
#undef def_body_start
#undef def_body_code_array_start

#pragma endregion Upfront

#pragma region Parsing

namespace Parser
{
	namespace ETokType
	{
#define GEN_DEFINE_ATTRIBUTE_TOKENS Entry( API_Export, GEN_API_Export_Code ) Entry( API_Import, GEN_API_Import_Code )

		enum Type : u32
		{
			Invalid,
			Access_Private,
			Access_Protected,
			Access_Public,
			Access_MemberSymbol,
			Access_StaticSymbol,
			Ampersand,
			Ampersand_DBL,
			Assign_Classifer,
			Attribute_Open,
			Attribute_Close,
			BraceCurly_Open,
			BraceCurly_Close,
			BraceSquare_Open,
			BraceSquare_Close,
			Capture_Start,
			Capture_End,
			Comment,
			Comment_End,
			Comment_Start,
			Char,
			Comma,
			Decl_Class,
			Decl_GNU_Attribute,
			Decl_MSVC_Attribute,
			Decl_Enum,
			Decl_Extern_Linkage,
			Decl_Friend,
			Decl_Module,
			Decl_Namespace,
			Decl_Operator,
			Decl_Struct,
			Decl_Template,
			Decl_Typedef,
			Decl_Using,
			Decl_Union,
			Identifier,
			Module_Import,
			Module_Export,
			NewLine,
			Number,
			Operator,
			Preprocess_Hash,
			Preprocess_Define,
			Preprocess_If,
			Preprocess_IfDef,
			Preprocess_IfNotDef,
			Preprocess_ElIf,
			Preprocess_Else,
			Preprocess_EndIf,
			Preprocess_Include,
			Preprocess_Pragma,
			Preprocess_Content,
			Preprocess_Macro,
			Preprocess_Unsupported,
			Spec_Alignas,
			Spec_Const,
			Spec_Consteval,
			Spec_Constexpr,
			Spec_Constinit,
			Spec_Explicit,
			Spec_Extern,
			Spec_Final,
			Spec_ForceInline,
			Spec_Global,
			Spec_Inline,
			Spec_Internal_Linkage,
			Spec_LocalPersist,
			Spec_Mutable,
			Spec_NeverInline,
			Spec_Override,
			Spec_Static,
			Spec_ThreadLocal,
			Spec_Volatile,
			Spec_Virtual,
			Star,
			Statement_End,
			StaticAssert,
			String,
			Type_Unsigned,
			Type_Signed,
			Type_Short,
			Type_Long,
			Type_char,
			Type_int,
			Type_double,
			Type_MS_int8,
			Type_MS_int16,
			Type_MS_int32,
			Type_MS_int64,
			Type_MS_W64,
			Varadic_Argument,
			__Attributes_Start,
			API_Export,
			API_Import,
			NumTokens
		};

		StrC to_str( Type type )
		{
			local_persist StrC lookup[] {
				{sizeof( "__invalid__" ),          "__invalid__"        },
				{ sizeof( "private" ),             "private"            },
				{ sizeof( "protected" ),           "protected"          },
				{ sizeof( "public" ),              "public"             },
				{ sizeof( "." ),                   "."                  },
				{ sizeof( "::" ),                  "::"                 },
				{ sizeof( "&" ),                   "&"                  },
				{ sizeof( "&&" ),                  "&&"                 },
				{ sizeof( ":" ),                   ":"                  },
				{ sizeof( "[[" ),                  "[["                 },
				{ sizeof( "]]" ),                  "]]"                 },
				{ sizeof( "{" ),                   "{"                  },
				{ sizeof( "}" ),                   "}"                  },
				{ sizeof( "[" ),                   "["                  },
				{ sizeof( "]" ),                   "]"                  },
				{ sizeof( "(" ),                   "("                  },
				{ sizeof( ")" ),                   ")"                  },
				{ sizeof( "__comment__" ),         "__comment__"        },
				{ sizeof( "__comment_end__" ),     "__comment_end__"    },
				{ sizeof( "__comment_start__" ),   "__comment_start__"  },
				{ sizeof( "__character__" ),       "__character__"      },
				{ sizeof( "," ),                   ","                  },
				{ sizeof( "class" ),               "class"              },
				{ sizeof( "__attribute__" ),       "__attribute__"      },
				{ sizeof( "__declspec" ),          "__declspec"         },
				{ sizeof( "enum" ),                "enum"               },
				{ sizeof( "extern" ),              "extern"             },
				{ sizeof( "friend" ),              "friend"             },
				{ sizeof( "module" ),              "module"             },
				{ sizeof( "namespace" ),           "namespace"          },
				{ sizeof( "operator" ),            "operator"           },
				{ sizeof( "struct" ),              "struct"             },
				{ sizeof( "template" ),            "template"           },
				{ sizeof( "typedef" ),             "typedef"            },
				{ sizeof( "using" ),               "using"              },
				{ sizeof( "union" ),               "union"              },
				{ sizeof( "__identifier__" ),      "__identifier__"     },
				{ sizeof( "import" ),              "import"             },
				{ sizeof( "export" ),              "export"             },
				{ sizeof( "__new_line__" ),        "__new_line__"       },
				{ sizeof( "__number__" ),          "__number__"         },
				{ sizeof( "__operator__" ),        "__operator__"       },
				{ sizeof( "#" ),                   "#"                  },
				{ sizeof( "define" ),              "define"             },
				{ sizeof( "if" ),                  "if"                 },
				{ sizeof( "ifdef" ),               "ifdef"              },
				{ sizeof( "ifndef" ),              "ifndef"             },
				{ sizeof( "elif" ),                "elif"               },
				{ sizeof( "else" ),                "else"               },
				{ sizeof( "endif" ),               "endif"              },
				{ sizeof( "include" ),             "include"            },
				{ sizeof( "pragma" ),              "pragma"             },
				{ sizeof( "__macro_content__" ),   "__macro_content__"  },
				{ sizeof( "__macro__" ),           "__macro__"          },
				{ sizeof( "__unsupported__" ),     "__unsupported__"    },
				{ sizeof( "alignas" ),             "alignas"            },
				{ sizeof( "const" ),               "const"              },
				{ sizeof( "consteval" ),           "consteval"          },
				{ sizeof( "constexpr" ),           "constexpr"          },
				{ sizeof( "constinit" ),           "constinit"          },
				{ sizeof( "explicit" ),            "explicit"           },
				{ sizeof( "extern" ),              "extern"             },
				{ sizeof( "final" ),               "final"              },
				{ sizeof( "forceinline" ),         "forceinline"        },
				{ sizeof( "global" ),              "global"             },
				{ sizeof( "inline" ),              "inline"             },
				{ sizeof( "internal" ),            "internal"           },
				{ sizeof( "local_persist" ),       "local_persist"      },
				{ sizeof( "mutable" ),             "mutable"            },
				{ sizeof( "neverinline" ),         "neverinline"        },
				{ sizeof( "override" ),            "override"           },
				{ sizeof( "static" ),              "static"             },
				{ sizeof( "thread_local" ),        "thread_local"       },
				{ sizeof( "volatile" ),            "volatile"           },
				{ sizeof( "virtual" ),             "virtual"            },
				{ sizeof( "*" ),                   "*"                  },
				{ sizeof( ";" ),                   ";"                  },
				{ sizeof( "static_assert" ),       "static_assert"      },
				{ sizeof( "__string__" ),          "__string__"         },
				{ sizeof( "unsigned" ),            "unsigned"           },
				{ sizeof( "signed" ),              "signed"             },
				{ sizeof( "short" ),               "short"              },
				{ sizeof( "long" ),                "long"               },
				{ sizeof( "char" ),                "char"               },
				{ sizeof( "int" ),                 "int"                },
				{ sizeof( "double" ),              "double"             },
				{ sizeof( "__int8" ),              "__int8"             },
				{ sizeof( "__int16" ),             "__int16"            },
				{ sizeof( "__int32" ),             "__int32"            },
				{ sizeof( "__int64" ),             "__int64"            },
				{ sizeof( "_W64" ),                "_W64"               },
				{ sizeof( "..." ),                 "..."                },
				{ sizeof( "__attrib_start__" ),    "__attrib_start__"   },
				{ sizeof( "GEN_API_Export_Code" ), "GEN_API_Export_Code"},
				{ sizeof( "GEN_API_Import_Code" ), "GEN_API_Import_Code"},
			};
			return lookup[ type ];
		}

		Type to_type( StrC str )
		{
			local_persist u32 keymap[ NumTokens ];
			do_once_start for ( u32 index = 0; index < NumTokens; index++ )
			{
				StrC enum_str   = to_str( ( Type )index );
				keymap[ index ] = crc32( enum_str.Ptr, enum_str.Len - 1 );
			}
			do_once_end u32 hash = crc32( str.Ptr, str.Len );
			for ( u32 index = 0; index < NumTokens; index++ )
			{
				if ( keymap[ index ] == hash )
					return ( Type )index;
			}
			return Invalid;
		}

	}    // namespace ETokType

	using TokType = ETokType::Type;

}    // namespace Parser

namespace Parser
{
	enum TokFlags : u32
	{
		TF_Operator        = bit( 0 ),
		TF_Assign          = bit( 0 ),
		TF_Preprocess      = bit( 1 ),
		TF_Comment         = bit( 2 ),
		TF_Attribute       = bit( 3 ),
		TF_AccessSpecifier = bit( 4 ),
		TF_Specifier       = bit( 5 ),
		TF_EndDefinition   = bit( 6 ),    // Either ; or }
	};

	struct Token
	{
		char const* Text;
		sptr        Length;
		TokType     Type;
		s32         Line;
		s32         Column;
		bool        IsAssign;

		// TokFlags Flags;

		operator bool()
		{
			return Text && Length && Type != TokType::Invalid;
		}

		operator StrC()
		{
			return { Length, Text };
		}

		bool is_access_specifier()
		{
			return Type >= TokType::Access_Private && Type <= TokType::Access_Public;
		}

		bool is_attribute()
		{
			return Type > TokType::__Attributes_Start;
		}

		bool is_preprocessor()
		{
			return Type >= TokType::Preprocess_Define && Type <= TokType::Preprocess_Pragma;
		}

		bool is_preprocess_cond()
		{
			return Type >= TokType::Preprocess_If && Type <= TokType::Preprocess_EndIf;
		}

		bool is_specifier()
		{
			return ( Type <= TokType::Star && Type >= TokType::Spec_Alignas ) || Type == TokType::Ampersand || Type == TokType::Ampersand_DBL;
		}

		AccessSpec to_access_specifier()
		{
			return scast( AccessSpec, Type );
		}

		String to_string()
		{
			String result = String::make_reserve( GlobalAllocator, kilobytes( 4 ) );

			StrC type_str = ETokType::to_str( Type );

			result.append_fmt( "Line: %d Column: %d, Type: %.*s Content: %.*s", Line, Column, type_str.Len, type_str.Ptr, Length, Text );

			return result;
		}
	};

	constexpr Token NullToken { nullptr, 0, TokType::Invalid, false, 0, 0 };

	struct TokArray
	{
		Array< Token > Arr;
		s32            Idx;

		bool __eat( TokType type );

		Token& current( bool skip_formatting = true )
		{
			if ( skip_formatting )
			{
				while ( Arr[ Idx ].Type == TokType::NewLine || Arr[ Idx ].Type == TokType::Comment )
					Idx++;
			}

			return Arr[ Idx ];
		}

		Token& previous( bool skip_formatting = false )
		{
			s32 idx = this->Idx;

			if ( skip_formatting )
			{
				while ( Arr[ idx ].Type == TokType::NewLine )
					idx--;

				return Arr[ idx ];
			}

			return Arr[ idx - 1 ];
		}

		Token& next( bool skip_formatting = false )
		{
			s32 idx = this->Idx;

			if ( skip_formatting )
			{
				while ( Arr[ idx ].Type == TokType::NewLine )
					idx++;

				return Arr[ idx ];
			}

			return Arr[ idx + 1 ];
		}

		Token& operator[]( s32 idx )
		{
			return Arr[ idx ];
		}
	};

	constexpr bool dont_skip_formatting = false;

	struct StackNode
	{
		StackNode* Prev;

		Token Start;
		Token Name;        // The name of the AST node (if parsed)
		StrC  ProcName;    // The name of the procedure
	};

	struct ParseContext
	{
		TokArray   Tokens;
		StackNode* Scope;

		void push( StackNode* node )
		{
			node->Prev = Scope;
			Scope      = node;

#if 0 && Build_Debug
			log_fmt("\tEntering Context: %.*s\n", Scope->ProcName.Len, Scope->ProcName.Ptr );
#endif
		}

		void pop()
		{
#if 0 && Build_Debug
			log_fmt("\tPopping  Context: %.*s\n", Scope->ProcName.Len, Scope->ProcName.Ptr );
#endif
			Scope = Scope->Prev;
		}

		String to_string()
		{
			String result       = String::make_reserve( GlobalAllocator, kilobytes( 4 ) );

			Token scope_start   = Scope->Start;
			Token last_valid    = Tokens.Idx >= Tokens.Arr.num() ? Tokens.Arr[ Tokens.Arr.num() - 1 ] : Tokens.current();

			sptr        length  = scope_start.Length;
			char const* current = scope_start.Text + length;
			while ( current <= Tokens.Arr.back().Text && *current != '\n' && length < 74 )
			{
				current++;
				length++;
			}

			String line = String::make( GlobalAllocator, { length, scope_start.Text } );
			result.append_fmt( "\tScope    : %s\n", line );
			line.free();

			sptr   dist            = ( sptr )last_valid.Text - ( sptr )scope_start.Text + 2;
			sptr   length_from_err = dist;
			String line_from_err   = String::make( GlobalAllocator, { length_from_err, last_valid.Text } );

			if ( length_from_err < 100 )
				result.append_fmt( "\t(%d, %d):%*c\n", last_valid.Line, last_valid.Column, length_from_err, '^' );
			else
				result.append_fmt( "\t(%d, %d)\n", last_valid.Line, last_valid.Column );

			StackNode* curr_scope = Scope;
			s32        level      = 0;
			do
			{
				if ( curr_scope->Name )
				{
					result.append_fmt( "\t%d: %s, AST Name: %.*s\n", level, curr_scope->ProcName.Ptr, curr_scope->Name.Length, curr_scope->Name.Text );
				}
				else
				{
					result.append_fmt( "\t%d: %s\n", level, curr_scope->ProcName.Ptr );
				}

				curr_scope = curr_scope->Prev;
				level++;
			} while ( curr_scope );
			return result;
		}
	};

	global ParseContext Context;

	bool TokArray::__eat( TokType type )
	{
		if ( Arr.num() - Idx <= 0 )
		{
			log_failure( "No tokens left.\n%s", Context.to_string() );
			return false;
		}

		if ( ( Arr[ Idx ].Type == TokType::NewLine && type != TokType::NewLine ) || ( Arr[ Idx ].Type == TokType::Comment && type != TokType::Comment ) )
		{
			Idx++;
		}

		if ( Arr[ Idx ].Type != type )
		{
			log_failure(
			"Parse Error, TokArray::eat, Expected: ' %s ' not ' %.*s ' (%d, %d)`\n%s",
			ETokType::to_str( type ).Ptr,
			Arr[ Idx ].Length,
			Arr[ Idx ].Text,
			current().Line,
			current().Column,
			Context.to_string()
			);

			return false;
		}

#if 0 && Build_Debug
		log_fmt("Ate: %S\n", Arr[Idx].to_string() );
#endif

		Idx++;
		return true;
	}

	global Array< Token > Tokens;

	neverinline TokArray lex( StrC content )
	{
#define current ( *scanner )

#define move_forward()         \
	{                          \
		if ( current == '\n' ) \
		{                      \
			line++;            \
			column = 1;        \
		}                      \
		else                   \
		{                      \
			column++;          \
		}                      \
		left--;                \
		scanner++;             \
	}

#define SkipWhitespace()                       \
	while ( left && char_is_space( current ) ) \
	{                                          \
		move_forward();                        \
	}

#define end_line()                          \
	do                                      \
	{                                       \
		while ( left && current == ' ' )    \
		{                                   \
			move_forward();                 \
		}                                   \
		if ( left && current == '\r' )      \
		{                                   \
			move_forward();                 \
			move_forward();                 \
		}                                   \
		else if ( left && current == '\n' ) \
		{                                   \
			move_forward();                 \
		}                                   \
	} while ( 0 )

		s32         left        = content.Len;
		char const* scanner     = content.Ptr;

		char const* word        = scanner;
		s32         word_length = 0;

		s32 line                = 1;
		s32 column              = 1;

		SkipWhitespace();
		if ( left <= 0 )
		{
			log_failure( "gen::lex: no tokens found (only whitespace provided)" );
			return { { nullptr }, 0 };
		}

		local_persist Arena_64KB defines_map_arena = Arena_64KB::init();
		HashTable< StrC >        defines           = HashTable< StrC >::init( defines_map_arena );

		Tokens.clear();

		while ( left )
		{
#if 0
			if (Tokens.num())
			{
				log_fmt("\nLastTok: %S", Tokens.back().to_string());
			}
#endif

			Token token    = { scanner, 0, TokType::Invalid, line, column, false };

			bool is_define = false;

			if ( column == 1 )
			{
				if ( current == '\r' )
				{
					move_forward();
					token.Length = 1;
				}

				if ( current == '\n' )
				{
					move_forward();

					token.Type = TokType::NewLine;
					token.Length++;

					Tokens.append( token );
					continue;
				}
			}

			token.Length = 0;

			SkipWhitespace();
			if ( left <= 0 )
				break;

			switch ( current )
			{
				case '#' :
				{
					char const* hash = scanner;
					Tokens.append( { hash, 1, TokType::Preprocess_Hash, line, column, false } );

					move_forward();
					SkipWhitespace();

					token.Text = scanner;
					while ( left && ! char_is_space( current ) )
					{
						move_forward();
						token.Length++;
					}

					token.Type = ETokType::to_type( token );

					if ( ! token.is_preprocessor() )
					{
						token.Type = TokType::Preprocess_Unsupported;

						// Its an unsupported directive, skip it
						s32 within_string = false;
						s32 within_char   = false;
						while ( left )
						{
							if ( current == '"' && ! within_char )
								within_string ^= true;

							if ( current == '\'' && ! within_string )
								within_char ^= true;

							if ( current == '\\' && ! within_string && ! within_char )
							{
								move_forward();
								token.Length++;

								if ( current == '\r' )
								{
									move_forward();
									token.Length++;
								}

								if ( current == '\n' )
								{
									move_forward();
									token.Length++;
									continue;
								}
								else
								{
									log_failure(
									"gen::Parser::lex: Invalid escape sequence '\\%c' (%d, %d)"
									" in preprocessor directive (%d, %d)\n%.100s",
									current,
									line,
									column,
									token.Line,
									token.Column,
									token.Text
									);
									break;
								}
							}

							if ( current == '\r' )
							{
								move_forward();
								token.Length++;
							}

							if ( current == '\n' )
							{
								move_forward();
								token.Length++;
								break;
							}

							move_forward();
							token.Length++;
						}

						token.Length = token.Length + token.Text - hash;
						token.Text   = hash;
						Tokens.append( token );
						continue;    // Skip found token, its all handled here.
					}

					if ( token.Type == TokType::Preprocess_Else || token.Type == TokType::Preprocess_EndIf )
					{
						Tokens.append( token );
						end_line();
						continue;
					}

					Tokens.append( token );

					SkipWhitespace();

					if ( token.Type == TokType::Preprocess_Define )
					{
						Token name  = { scanner, 0, TokType::Identifier, line, column, false };

						name.Text   = scanner;
						name.Length = 1;
						move_forward();

						while ( left && ( char_is_alphanumeric( current ) || current == '_' ) )
						{
							move_forward();
							name.Length++;
						}

						if ( left && current == '(' )
						{
							move_forward();
							name.Length++;
						}

						Tokens.append( name );

						u64 key = crc32( name.Text, name.Length );
						defines.set( key, name );
					}

					Token content = { scanner, 0, TokType::Preprocess_Content, line, column, false };

					if ( token.Type == TokType::Preprocess_Include )
					{
						content.Type = TokType::String;

						if ( current != '"' && current != '<' )
						{
							String directive_str = String::fmt_buf( GlobalAllocator, "%.*s", min( 80, left + content.Length ), token.Text );

							log_failure(
							"gen::Parser::lex: Expected '\"' or '<' after #include, not '%c' (%d, %d)\n%s",
							current,
							content.Line,
							content.Column,
							directive_str.Data
							);
							return { { nullptr }, 0 };
						}
						move_forward();
						content.Length++;

						while ( left && current != '"' && current != '>' )
						{
							move_forward();
							content.Length++;
						}

						move_forward();
						content.Length++;

						Tokens.append( content );
						continue;    // Skip found token, its all handled here.
					}

					s32 within_string = false;
					s32 within_char   = false;

					// SkipWhitespace();
					while ( left )
					{
						if ( current == '"' && ! within_char )
							within_string ^= true;

						if ( current == '\'' && ! within_string )
							within_char ^= true;

						if ( current == '\\' && ! within_string && ! within_char )
						{
							move_forward();
							content.Length++;

							if ( current == '\r' )
							{
								move_forward();
								content.Length++;
							}

							if ( current == '\n' )
							{
								move_forward();
								content.Length++;
								continue;
							}
							else
							{
								String directive_str = String::make_length( GlobalAllocator, token.Text, token.Length );
								String content_str   = String::fmt_buf( GlobalAllocator, "%.*s", min( 400, left + content.Length ), content.Text );

								log_failure(
								"gen::Parser::lex: Invalid escape sequence '\\%c' (%d, %d)"
								" in preprocessor directive '%s' (%d, %d)\n%s",
								current,
								line,
								column,
								directive_str,
								content.Line,
								content.Column,
								content_str
								);
								break;
							}
						}

						if ( current == '\r' )
						{
							move_forward();
						}

						if ( current == '\n' )
						{
							move_forward();
							break;
						}

						move_forward();
						content.Length++;
					}

					Tokens.append( content );
					continue;    // Skip found token, its all handled here.
				}
				case '.' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::Access_MemberSymbol;

					if ( left )
					{
						move_forward();
					}

					if ( current == '.' )
					{
						move_forward();
						if ( current == '.' )
						{
							token.Length = 3;
							token.Type   = TokType::Varadic_Argument;
							move_forward();
						}
						else
						{
							String context_str = String::fmt_buf( GlobalAllocator, "%s", scanner, min( 100, left ) );

							log_failure( "gen::lex: invalid varadic argument, expected '...' got '..%c' (%d, %d)\n%s", current, line, column, context_str );
						}
					}

					goto FoundToken;
				}
				case '&' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::Ampersand;

					if ( left )
						move_forward();

					if ( current == '&' )    // &&
					{
						token.Length = 2;
						token.Type   = TokType::Ampersand_DBL;

						if ( left )
							move_forward();
					}

					goto FoundToken;
				}
				case ':' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::Assign_Classifer;
					// Can be either a classifier (ParentType, Bitfield width), or ternary else
					// token.Type   = TokType::Colon;

					if ( left )
						move_forward();

					if ( current == ':' )
					{
						move_forward();
						token.Type = TokType::Access_StaticSymbol;
						token.Length++;
					}
					goto FoundToken;
				}
				case '{' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::BraceCurly_Open;

					if ( left )
						move_forward();
					goto FoundToken;
				}
				case '}' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::BraceCurly_Close;

					if ( left )
						move_forward();

					end_line();
					goto FoundToken;
				}
				case '[' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::BraceSquare_Open;
					if ( left )
					{
						move_forward();

						if ( current == ']' )
						{
							token.Length = 2;
							token.Type   = TokType::Operator;
							move_forward();
						}
					}
					goto FoundToken;
				}
				case ']' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::BraceSquare_Close;

					if ( left )
						move_forward();
					goto FoundToken;
				}
				case '(' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::Capture_Start;

					if ( left )
						move_forward();
					goto FoundToken;
				}
				case ')' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::Capture_End;

					if ( left )
						move_forward();
					goto FoundToken;
				}
				case '\'' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::Char;

					move_forward();

					if ( left && current == '\\' )
					{
						move_forward();
						token.Length++;

						if ( current == '\'' )
						{
							move_forward();
							token.Length++;
						}
					}

					while ( left && current != '\'' )
					{
						move_forward();
						token.Length++;
					}

					if ( left )
					{
						move_forward();
						token.Length++;
					}
					goto FoundToken;
				}
				case ',' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::Comma;

					if ( left )
						move_forward();
					goto FoundToken;
				}
				case '*' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::Star;

					if ( left )
						move_forward();
					goto FoundToken;
				}
				case ';' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::Statement_End;

					if ( left )
						move_forward();

					end_line();
					goto FoundToken;
				}
				case '"' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::String;

					move_forward();
					while ( left )
					{
						if ( current == '"' )
						{
							move_forward();
							break;
						}

						if ( current == '\\' )
						{
							move_forward();
							token.Length++;

							if ( left )
							{
								move_forward();
								token.Length++;
							}
							continue;
						}

						move_forward();
						token.Length++;
					}
					goto FoundToken;
				}
				case '?' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::Operator;
					// token.Type     = TokType::Ternary;
					token.IsAssign = false;

					if ( left )
						move_forward();

					goto FoundToken;
				}
				case '=' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::Operator;
					// token.Type     = TokType::Assign;
					token.IsAssign = true;
					// token.Flags |= TokFlags::Assignment;

					if ( left )
						move_forward();

					if ( current == '=' )
					{
						token.Length++;
						token.IsAssign = false;

						if ( left )
							move_forward();
					}

					goto FoundToken;
				}
				case '+' :
				{
					// token.Type = TokType::Add
				}
				case '%' :
				{
					// token.Type = TokType::Modulo;
				}
				case '^' :
				{
					// token.Type = TokType::B_XOr;
				}
				case '~' :
				{
					// token.Type = TokType::Unary_Not;
				}
				case '!' :
				{
					// token.Type = TokType::L_Not;
				}
				case '<' :
				{
					// token.Type = TokType::Lesser;
				}
				case '>' :
				{
					// token.Type = TokType::Greater;
				}
				case '|' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::Operator;
					// token.Type   = TokType::L_Or;

					if ( left )
						move_forward();

					if ( current == '=' )
					{
						token.Length++;
						token.IsAssign = true;
						// token.Flags |= TokFlags::Assignment;
						// token.Type = TokType::Assign_L_Or;

						if ( left )
							move_forward();
					}
					else
						while ( left && current == *( scanner - 1 ) && token.Length < 3 )
						{
							token.Length++;

							if ( left )
								move_forward();
						}
					goto FoundToken;
				}

				// Dash is unfortunatlly a bit more complicated...
				case '-' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::Operator;
					// token.Type = TokType::Subtract;
					if ( left )
					{
						move_forward();

						if ( current == '>' )
						{
							token.Length++;
							move_forward();

							if ( current == '*' )
							{
								token.Length++;
								move_forward();
							}
						}
						else if ( current == '=' )
						{
							token.Length++;
							token.IsAssign = true;
							// token.Flags |= TokFlags::Assignment;
							// token.Type = TokType::Assign_Subtract;

							if ( left )
								move_forward();
						}
						else
							while ( left && current == *( scanner - 1 ) && token.Length < 3 )
							{
								token.Length++;

								if ( left )
									move_forward();
							}
					}
					goto FoundToken;
				}
				case '/' :
				{
					token.Text   = scanner;
					token.Length = 1;
					token.Type   = TokType::Operator;
					// token.Type   = TokType::Divide;
					move_forward();

					if ( left )
					{
						if ( current == '/' )
						{
							token.Type   = TokType::Comment;
							token.Length = 2;
							move_forward();

							while ( left && current != '\n' && current != '\r' )
							{
								move_forward();
								token.Length++;
							}

							if ( current == '\r' )
							{
								move_forward();
								token.Length++;
							}
							if ( current == '\n' )
							{
								move_forward();
								token.Length++;
							}
							Tokens.append( token );
							continue;
						}
						else if ( current == '*' )
						{
							token.Type   = TokType::Comment;
							token.Length = 2;
							move_forward();

							bool star   = current == '*';
							bool slash  = scanner[ 1 ] == '/';
							bool at_end = star && slash;
							while ( left && ! at_end )
							{
								move_forward();
								token.Length++;

								star   = current == '*';
								slash  = scanner[ 1 ] == '/';
								at_end = star && slash;
							}
							token.Length += 2;
							move_forward();
							move_forward();

							if ( current == '\r' )
							{
								move_forward();
								token.Length++;
							}
							if ( current == '\n' )
							{
								move_forward();
								token.Length++;
							}
							Tokens.append( token );
							// end_line();
							continue;
						}
					}
					goto FoundToken;
				}
			}

			if ( char_is_alpha( current ) || current == '_' )
			{
				token.Text   = scanner;
				token.Length = 1;
				move_forward();

				while ( left && ( char_is_alphanumeric( current ) || current == '_' ) )
				{
					move_forward();
					token.Length++;
				}

				goto FoundToken;
			}
			else if ( char_is_digit( current ) )
			{
				// This is a very brute force lex, no checks are done for validity of literal.

				token.Text   = scanner;
				token.Length = 1;
				token.Type   = TokType::Number;
				move_forward();

				if ( left && ( current == 'x' || current == 'X' || current == 'b' || current == 'B' || current == 'o' || current == 'O' ) )
				{
					move_forward();
					token.Length++;

					while ( left && char_is_hex_digit( current ) )
					{
						move_forward();
						token.Length++;
					}

					goto FoundToken;
				}

				while ( left && char_is_digit( current ) )
				{
					move_forward();
					token.Length++;
				}

				if ( left && current == '.' )
				{
					move_forward();
					token.Length++;

					while ( left && char_is_digit( current ) )
					{
						move_forward();
						token.Length++;
					}
				}

				goto FoundToken;
			}
			else
			{
				s32 start = max( 0, Tokens.num() - 100 );
				log_fmt( "\n%d\n", start );
				for ( s32 idx = start; idx < Tokens.num(); idx++ )
				{
					log_fmt( "Token %d Type: %s : %.*s\n", idx, ETokType::to_str( Tokens[ idx ].Type ).Ptr, Tokens[ idx ].Length, Tokens[ idx ].Text );
				}

				String context_str = String::fmt_buf( GlobalAllocator, "%.*s", min( 100, left ), scanner );
				log_failure( "Failed to lex token '%c' (%d, %d)\n%s", current, line, column, context_str );

				// Skip to next whitespace since we can't know if anything else is valid until then.
				while ( left && ! char_is_space( current ) )
				{
					move_forward();
				}
			}

		FoundToken:

			if ( token.Type != TokType::Invalid )
			{
				Tokens.append( token );
				continue;
			}

			TokType type = ETokType::to_type( token );

			if ( type == ETokType::Decl_Extern_Linkage )
			{
				SkipWhitespace();

				if ( current != '"' )
					type = ETokType::Spec_Extern;

				token.Type = type;
				Tokens.append( token );
				continue;
			}

			if ( type != TokType::Invalid )
			{
				token.Type = type;
				Tokens.append( token );
				continue;
			}

			u64 key = 0;
			if ( current == '(' )
				key = crc32( token.Text, token.Length + 1 );
			else
				key = crc32( token.Text, token.Length );

			StrC* define = defines.get( key );
			if ( define )
			{
				token.Type = TokType::Preprocess_Macro;

				// Want to ignore any arguments the define may have as they can be execution expressions.
				if ( left && current == '(' )
				{
					move_forward();
					token.Length++;

					s32 level = 0;
					while ( left && ( current != ')' || level > 0 ) )
					{
						if ( current == '(' )
							level++;

						else if ( current == ')' && level > 0 )
							level--;

						move_forward();
						token.Length++;
					}

					move_forward();
					token.Length++;
				}

				if ( current == '\r' && scanner[ 1 ] == '\n' )
				{
					move_forward();
				}
				else if ( current == '\n' )
				{
					move_forward();
				}
			}
			else
			{
				token.Type = TokType::Identifier;
			}

			Tokens.append( token );
		}

		if ( Tokens.num() == 0 )
		{
			log_failure( "Failed to lex any tokens" );
			return { { nullptr }, 0 };
		}

		defines.clear();
		// defines_map_arena.free();
		return { Tokens, 0 };
#undef current
#undef move_forward
#undef SkipWhitespace
	}
}    // namespace Parser

internal void init_parser()
{
	using namespace Parser;

	Tokens = Array< Token >::init_reserve( LexArena, ( LexAllocator_Size - sizeof( Array< Token >::Header ) ) / sizeof( Token ) );
}

internal void deinit_parser()
{
	Parser::Tokens = { nullptr };
}

#pragma region Helper Macros

#define check_parse_args( def )                                                      \
	if ( def.Len <= 0 )                                                              \
	{                                                                                \
		log_failure( "gen::" stringize( __func__ ) ": length must greater than 0" ); \
		Parser::Context.pop();                                                       \
		return CodeInvalid;                                                          \
	}                                                                                \
	if ( def.Ptr == nullptr )                                                        \
	{                                                                                \
		log_failure( "gen::" stringize( __func__ ) ": def was null" );               \
		Parser::Context.pop();                                                       \
		return CodeInvalid;                                                          \
	}

#define currtok_noskip        Context.Tokens.current( dont_skip_formatting )
#define currtok               Context.Tokens.current()
#define prevtok               Context.Tokens.previous()
#define nexttok               Context.Tokens.next()
#define eat( Type_ )          Context.Tokens.__eat( Type_ )
#define left                  ( Context.Tokens.Arr.num() - Context.Tokens.Idx )

#define check_noskip( Type_ ) ( left && currtok_noskip.Type == Type_ )
#define check( Type_ )        ( left && currtok.Type == Type_ )

#define push_scope()                                                         \
	StackNode scope { nullptr, currtok_noskip, NullToken, txt( __func__ ) }; \
	Context.push( &scope )

#pragma endregion Helper Macros

// Procedure Forwards ( Entire parser internal parser interface )

internal Code           parse_array_decl();
internal CodeAttributes parse_attributes();
internal CodeComment    parse_comment();
internal Code           parse_compilcated_definition();
internal CodeBody       parse_class_struct_body( Parser::TokType which, Parser::Token name = Parser::NullToken );
internal Code           parse_class_struct( Parser::TokType which, bool inplace_def );
internal CodeDefine     parse_define();
internal Code           parse_foward_or_definition( Parser::TokType which, bool is_inplace );
internal CodeFn parse_function_after_name( ModuleFlag mflags, CodeAttributes attributes, CodeSpecifiers specifiers, CodeType ret_type, Parser::Token name );
internal Code   parse_function_body();
internal Code   parse_global_nspace();
internal Parser::Token      parse_identifier( bool* possible_member_function = nullptr );
internal CodeInclude        parse_include();
internal CodeOperator       parse_operator_after_ret_type( ModuleFlag mflags, CodeAttributes attributes, CodeSpecifiers specifiers, CodeType ret_type );
internal Code               parse_operator_function_or_variable( bool expects_function, CodeAttributes attributes, CodeSpecifiers specifiers );
internal CodePragma         parse_pragma();
internal CodeParam          parse_params( bool use_template_capture = false );
internal CodePreprocessCond parse_preprocess_cond();
internal Code               parse_simple_preprocess( Parser::TokType which );
internal Code               parse_static_assert();
internal void               parse_template_args( Parser::Token& token );
internal CodeVar            parse_variable_after_name( ModuleFlag mflags, CodeAttributes attributes, CodeSpecifiers specifiers, CodeType type, StrC name );

internal CodeClass       parse_class( bool inplace_def = false );
internal CodeConstructor parse_constructor();
internal CodeDestructor  parse_destructor( CodeSpecifiers specifiers = NoCode );
internal CodeEnum        parse_enum( bool inplace_def = false );
internal CodeBody        parse_export_body();
internal CodeBody        parse_extern_link_body();
internal CodeExtern      parse_exten_link();
internal CodeFriend      parse_friend();
internal CodeFn          parse_function();
internal CodeNS          parse_namespace();
internal CodeOpCast      parse_operator_cast( CodeSpecifiers specifiers = NoCode );
internal CodeStruct      parse_struct( bool inplace_def = false );
internal CodeVar         parse_variable();
internal CodeTemplate    parse_template();
internal CodeType        parse_type( bool* is_function = nullptr );
internal CodeTypedef     parse_typedef();
internal CodeUnion       parse_union( bool inplace_def = false );
internal CodeUsing       parse_using();

constexpr bool inplace_def = true;

// Internal parsing functions

constexpr bool strip_formatting_dont_preserve_newlines = false;

/*
    This function was an attempt at stripping formatting from any c++ code.
    It has edge case failures that prevent it from being used in function bodies.
*/
String strip_formatting( StrC raw_text, bool preserve_newlines = true )
{
	String content = String::make_reserve( GlobalAllocator, raw_text.Len );

	if ( raw_text.Len == 0 )
		return content;

#define cut_length ( scanner - raw_text.Ptr - last_cut )
#define cut_ptr    ( raw_text.Ptr + last_cut )
#define pos        ( sptr( scanner ) - sptr( raw_text.Ptr ) )
#define move_fwd() \
	do             \
	{              \
		scanner++; \
		tokleft--; \
	} while ( 0 )

	s32         tokleft  = raw_text.Len;
	sptr        last_cut = 0;
	char const* scanner  = raw_text.Ptr;

	if ( scanner[ 0 ] == ' ' )
	{
		move_fwd();
		last_cut = 1;
	}

	bool within_string     = false;
	bool within_char       = false;
	bool must_keep_newline = false;
	while ( tokleft )
	{
		// Skip over the content of string literals
		if ( scanner[ 0 ] == '"' )
		{
			move_fwd();

			while ( tokleft && ( scanner[ 0 ] != '"' || *( scanner - 1 ) == '\\' ) )
			{
				if ( scanner[ 0 ] == '\\' && tokleft > 1 )
				{
					scanner += 2;
					tokleft -= 2;
				}
				else
				{
					move_fwd();
				}
			}

			// Skip the closing "
			if ( tokleft )
				move_fwd();

			content.append( cut_ptr, cut_length );
			last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
			continue;
		}

		// Skip over the content of character literals
		if ( scanner[ 0 ] == '\'' )
		{
			move_fwd();

			while ( tokleft && ( scanner[ 0 ] != '\'' || ( *( scanner - 1 ) == '\\' ) ) )
			{
				move_fwd();
			}

			// Skip the closing '
			if ( tokleft )
				move_fwd();

			content.append( cut_ptr, cut_length );
			last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
			continue;
		}

		// Block comments
		if ( tokleft > 1 && scanner[ 0 ] == '/' && scanner[ 1 ] == '*' )
		{
			while ( tokleft > 1 && ! ( scanner[ 0 ] == '*' && scanner[ 1 ] == '/' ) )
				move_fwd();

			scanner += 2;
			tokleft -= 2;

			content.append( cut_ptr, cut_length );
			last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
			continue;
		}

		// Line comments
		if ( tokleft > 1 && scanner[ 0 ] == '/' && scanner[ 1 ] == '/' )
		{
			must_keep_newline  = true;

			scanner           += 2;
			tokleft           -= 2;

			while ( tokleft && scanner[ 0 ] != '\n' )
				move_fwd();

			if ( tokleft )
				move_fwd();

			content.append( cut_ptr, cut_length );
			last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
			continue;
		}

		// Tabs
		if ( scanner[ 0 ] == '\t' )
		{
			if ( pos > last_cut )
				content.append( cut_ptr, cut_length );

			if ( content.back() != ' ' )
				content.append( ' ' );

			move_fwd();
			last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
			continue;
		}

		if ( tokleft > 1 && scanner[ 0 ] == '\r' && scanner[ 1 ] == '\n' )
		{
			if ( must_keep_newline || preserve_newlines )
			{
				must_keep_newline  = false;

				scanner           += 2;
				tokleft           -= 2;

				content.append( cut_ptr, cut_length );
				last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
				continue;
			}

			if ( pos > last_cut )
				content.append( cut_ptr, cut_length );

			// Replace with a space
			if ( content.back() != ' ' )
				content.append( ' ' );

			scanner  += 2;
			tokleft  -= 2;

			last_cut  = sptr( scanner ) - sptr( raw_text.Ptr );
			continue;
		}

		if ( scanner[ 0 ] == '\n' )
		{
			if ( must_keep_newline || preserve_newlines )
			{
				must_keep_newline = false;

				move_fwd();

				content.append( cut_ptr, cut_length );
				last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
				continue;
			}

			if ( pos > last_cut )
				content.append( cut_ptr, cut_length );

			// Replace with a space
			if ( content.back() != ' ' )
				content.append( ' ' );

			move_fwd();

			last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
			continue;
		}

		// Escaped newlines
		if ( scanner[ 0 ] == '\\' )
		{
			content.append( cut_ptr, cut_length );

			s32 amount_to_skip = 1;
			if ( tokleft > 1 && scanner[ 1 ] == '\n' )
			{
				amount_to_skip = 2;
			}
			else if ( tokleft > 2 && scanner[ 1 ] == '\r' && scanner[ 2 ] == '\n' )
			{
				amount_to_skip = 3;
			}

			if ( amount_to_skip > 1 && pos == last_cut )
			{
				scanner += amount_to_skip;
				tokleft -= amount_to_skip;
			}
			else
				move_fwd();

			last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
			continue;
		}

		// Consectuive spaces
		if ( tokleft > 1 && char_is_space( scanner[ 0 ] ) && char_is_space( scanner[ 1 ] ) )
		{
			content.append( cut_ptr, cut_length );
			do
			{
				move_fwd();
			} while ( tokleft && char_is_space( scanner[ 0 ] ) );

			last_cut = sptr( scanner ) - sptr( raw_text.Ptr );

			// Preserve only 1 space of formattting
			if ( content.back() != ' ' )
				content.append( ' ' );

			continue;
		}

		move_fwd();
	}

	if ( last_cut < raw_text.Len )
	{
		content.append( cut_ptr, raw_text.Len - last_cut );
	}

#undef cut_ptr
#undef cut_length
#undef pos
#undef move_fwd

	return content;
}

internal Code parse_array_decl()
{
	using namespace Parser;
	push_scope();

	if ( check( TokType::Operator ) && currtok.Text[ 0 ] == '[' && currtok.Text[ 1 ] == ']' )
	{
		Code array_expr = untyped_str( currtok );
		eat( TokType::Operator );

		Context.pop();
		return array_expr;
	}

	if ( check( TokType::BraceSquare_Open ) )
	{
		eat( TokType::BraceSquare_Open );

		if ( left == 0 )
		{
			log_failure( "Error, unexpected end of array declaration ( '[]' scope started )\n%s", Context.to_string() );
			Context.pop();
			return CodeInvalid;
		}

		if ( currtok.Type == TokType::BraceSquare_Close )
		{
			log_failure( "Error, empty array expression in definition\n%s", Context.to_string() );
			Context.pop();
			return CodeInvalid;
		}

		Token untyped_tok = currtok;

		while ( left && currtok.Type != TokType::BraceSquare_Close )
		{
			eat( currtok.Type );
		}

		untyped_tok.Length = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )untyped_tok.Text;

		Code array_expr    = untyped_str( untyped_tok );

		if ( left == 0 )
		{
			log_failure( "Error, unexpected end of array declaration, expected ]\n%s", Context.to_string() );
			Context.pop();
			return CodeInvalid;
		}

		if ( currtok.Type != TokType::BraceSquare_Close )
		{
			log_failure( "%s: Error, expected ] in array declaration, not %s\n%s", ETokType::to_str( currtok.Type ), Context.to_string() );
			Context.pop();
			return CodeInvalid;
		}

		eat( TokType::BraceSquare_Close );

		// Its a multi-dimensional array
		if ( check( TokType::BraceSquare_Open ) )
		{
			Code adjacent_arr_expr = parse_array_decl();

			array_expr->Next       = adjacent_arr_expr.ast;
		}

		Context.pop();
		return array_expr;
	}

	Context.pop();
	return { nullptr };
}

internal inline CodeAttributes parse_attributes()
{
	using namespace Parser;
	push_scope();

	Token start = NullToken;
	s32   len   = 0;

	if ( check( TokType::Attribute_Open ) )
	{
		eat( TokType::Attribute_Open );

		start = currtok;
		while ( left && currtok.Type != TokType::Attribute_Close )
		{
			eat( currtok.Type );
		}

		eat( TokType::Attribute_Close );

		s32 len = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )start.Text;
	}

	else if ( check( TokType::Decl_GNU_Attribute ) )
	{
		eat( TokType::Capture_Start );
		eat( TokType::Capture_Start );

		start = currtok;
		while ( left && currtok.Type != TokType::Capture_End )
		{
			eat( currtok.Type );
		}

		eat( TokType::Capture_End );
		eat( TokType::Capture_End );

		s32 len = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )start.Text;
	}

	else if ( check( TokType::Decl_MSVC_Attribute ) )
	{
		eat( TokType::Decl_MSVC_Attribute );
		eat( TokType::Capture_Start );

		start = currtok;
		while ( left && currtok.Type != TokType::Capture_End )
		{
			eat( currtok.Type );
		}

		eat( TokType::Capture_End );

		s32 len = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )start.Text;
	}

	else if ( currtok.is_attribute() )
	{
		eat( currtok.Type );
		s32 len = start.Length;
	}

	if ( len > 0 )
	{
		StrC attribute_txt = { len, start.Text };
		Context.pop();

		String name_stripped = strip_formatting( attribute_txt, strip_formatting_dont_preserve_newlines );

		Code result          = make_code();
		result->Type         = ECode::PlatformAttributes;
		result->Name         = get_cached_string( name_stripped );
		result->Content      = result->Name;
		// result->Token   =

		return ( CodeAttributes )result;
	}

	Context.pop();
	return { nullptr };
}

internal CodeComment parse_comment()
{
	using namespace Parser;
	StackNode scope { nullptr, currtok_noskip, NullToken, txt( __func__ ) };
	Context.push( &scope );

	CodeComment result = ( CodeComment )make_code();
	result->Type       = ECode::Comment;
	result->Content    = get_cached_string( currtok_noskip );
	result->Name       = result->Content;
	// result->Token   = currtok_noskip;
	eat( TokType::Comment );

	Context.pop();
	return result;
}

internal Code parse_complicated_definition( Parser::TokType which )
{
	using namespace Parser;
	push_scope();

	bool is_inplace = false;

	TokArray tokens = Context.Tokens;

	s32 idx         = tokens.Idx;
	s32 level       = 0;
	for ( ; idx < tokens.Arr.num(); idx++ )
	{
		if ( tokens[ idx ].Type == TokType::BraceCurly_Open )
			level++;

		if ( tokens[ idx ].Type == TokType::BraceCurly_Close )
			level--;

		if ( level == 0 && tokens[ idx ].Type == TokType::Statement_End )
			break;
	}

	if ( ( idx - 2 ) == tokens.Idx )
	{
		// Its a forward declaration only
		return parse_foward_or_definition( which, is_inplace );
	}

	Token tok = tokens[ idx - 1 ];
	if ( tok.Type == TokType::Identifier )
	{
		tok                 = tokens[ idx - 2 ];

		bool is_indirection = tok.Type == TokType::Ampersand || tok.Type == TokType::Star;

		bool ok_to_parse    = false;

		if ( tok.Type == TokType::BraceCurly_Close )
		{
			// Its an inplace definition
			// <which> <type_identifier> { ... } <identifier>;
			ok_to_parse = true;
			is_inplace  = true;
		}
		else if ( tok.Type == TokType::Identifier && tokens[ idx - 3 ].Type == TokType::Decl_Struct )
		{
			// Its a variable with type ID using struct namespace.
			// <which> <type_identifier> <identifier>;
			ok_to_parse = true;
		}
		else if ( is_indirection )
		{
			// Its a indirection type with type ID using struct namespace.
			// <which> <type_identifier>* <identifier>;
			ok_to_parse = true;
		}

		if ( ! ok_to_parse )
		{
			log_failure( "Unsupported or bad member definition after struct declaration\n%s", Context.to_string() );
			Context.pop();
			return CodeInvalid;
		}

		Code result = parse_operator_function_or_variable( false, { nullptr }, { nullptr } );
		Context.pop();
		return result;
	}
	else if ( tok.Type == TokType::BraceCurly_Close )
	{
		// Its a definition
		// <which> { ... };
		return parse_foward_or_definition( which, is_inplace );
	}
	else if ( tok.Type == TokType::BraceSquare_Close )
	{
		// Its an array definition
		// <which> <type_identifier> <identifier> [ ... ];
		Code result = parse_operator_function_or_variable( false, { nullptr }, { nullptr } );
		Context.pop();
		return result;
	}
	else
	{
		log_failure( "Unsupported or bad member definition after struct declaration\n%s", Context.to_string() );
		Context.pop();
		return CodeInvalid;
	}
}

internal neverinline CodeBody parse_class_struct_body( Parser::TokType which, Parser::Token name )
{
	using namespace Parser;
	using namespace ECode;
	push_scope();

	eat( TokType::BraceCurly_Open );

	CodeBody result = ( CodeBody )make_code();

	if ( which == TokType::Decl_Class )
		result->Type = Class_Body;

	else
		result->Type = Struct_Body;

	while ( left && currtok_noskip.Type != TokType::BraceCurly_Close )
	{
		Code           member     = Code::Invalid;
		CodeAttributes attributes = { nullptr };
		CodeSpecifiers specifiers = { nullptr };

		bool expects_function     = false;

		Context.Scope->Start      = currtok_noskip;

		if ( currtok_noskip.Type == TokType::Preprocess_Hash )
			eat( TokType::Preprocess_Hash );

		switch ( currtok_noskip.Type )
		{
			case TokType::NewLine :
				member = fmt_newline;
				eat( TokType::NewLine );
				break;

			case TokType::Comment :
				member = parse_comment();
				break;

			case TokType::Access_Public :
				member = access_public;
				eat( TokType::Access_Public );
				eat( TokType::Assign_Classifer );
				break;

			case TokType::Access_Protected :
				member = access_protected;
				eat( TokType::Access_Protected );
				eat( TokType::Assign_Classifer );
				break;

			case TokType::Access_Private :
				member = access_private;
				eat( TokType::Access_Private );
				eat( TokType::Assign_Classifer );
				break;

			case TokType::Decl_Class :
				member = parse_complicated_definition( TokType::Decl_Class );
				break;

			case TokType::Decl_Enum :
				member = parse_complicated_definition( TokType::Decl_Enum );
				break;

			case TokType::Decl_Friend :
				member = parse_friend();
				break;

			case TokType::Decl_Operator :
				member = parse_operator_cast();
				break;

			case TokType::Decl_Struct :
				member = parse_complicated_definition( TokType::Decl_Struct );
				break;

			case TokType::Decl_Template :
				member = parse_template();
				break;

			case TokType::Decl_Typedef :
				member = parse_typedef();
				break;

			case TokType::Decl_Union :
				member = parse_complicated_definition( TokType::Decl_Union );
				break;

			case TokType::Decl_Using :
				member = parse_using();
				break;

			case TokType::Operator :
				if ( currtok.Text[ 0 ] != '~' )
				{
					log_failure( "Operator token found in global body but not destructor unary negation\n%s", Context.to_string() );
					return CodeInvalid;
				}

				member = parse_destructor();
				break;

			case TokType::Preprocess_Define :
				member = parse_define();
				break;

			case TokType::Preprocess_Include :
				member = parse_include();
				break;

			case TokType::Preprocess_If :
			case TokType::Preprocess_IfDef :
			case TokType::Preprocess_IfNotDef :
			case TokType::Preprocess_ElIf :
				member = parse_preprocess_cond();
				break;

			case TokType::Preprocess_Macro :
				member = parse_simple_preprocess( TokType::Preprocess_Macro );
				break;

			case TokType::Preprocess_Pragma :
				member = parse_pragma();
				break;

			case TokType::Preprocess_Else :
				member = preprocess_else;
				eat( TokType::Preprocess_Else );
				break;

			case TokType::Preprocess_EndIf :
				member = preprocess_endif;
				eat( TokType::Preprocess_EndIf );
				break;

			case TokType::Preprocess_Unsupported :
				member = parse_simple_preprocess( TokType::Preprocess_Unsupported );
				break;

			case TokType::StaticAssert :
				member = parse_static_assert();
				break;

			case TokType::Attribute_Open :
			case TokType::Decl_GNU_Attribute :
			case TokType::Decl_MSVC_Attribute :
#define Entry( attribute, str ) case TokType::attribute :
				GEN_DEFINE_ATTRIBUTE_TOKENS
#undef Entry
				{
					attributes = parse_attributes();
				}
			//! Fallthrough intended
			case TokType::Spec_Consteval :
			case TokType::Spec_Constexpr :
			case TokType::Spec_Constinit :
			case TokType::Spec_ForceInline :
			case TokType::Spec_Inline :
			case TokType::Spec_Mutable :
			case TokType::Spec_NeverInline :
			case TokType::Spec_Static :
			case TokType::Spec_Volatile :
			{
				SpecifierT specs_found[ 16 ] { ESpecifier::NumSpecifiers };
				s32        NumSpecifiers = 0;

				while ( left && currtok.is_specifier() )
				{
					SpecifierT spec = ESpecifier::to_type( currtok );

					switch ( spec )
					{
						case ESpecifier::Constexpr :
						case ESpecifier::Constinit :
						case ESpecifier::Inline :
						case ESpecifier::ForceInline :
						case ESpecifier::Mutable :
						case ESpecifier::NeverInline :
						case ESpecifier::Static :
						case ESpecifier::Volatile :
							break;

						case ESpecifier::Consteval :
							expects_function = true;
							break;

						default :
							log_failure( "Invalid specifier %s for variable\n%s", ESpecifier::to_str( spec ), Context.to_string() );
							Context.pop();
							return CodeInvalid;
					}

					specs_found[ NumSpecifiers ] = spec;
					NumSpecifiers++;
					eat( currtok.Type );
				}

				if ( NumSpecifiers )
				{
					specifiers = def_specifiers( NumSpecifiers, specs_found );
				}

				if ( currtok.Type == TokType::Operator && currtok.Text[ 0 ] == '~' )
				{
					member = parse_destructor( specifiers );
					break;
				}

				if ( currtok.Type == TokType::Decl_Operator )
				{
					member = parse_operator_cast( specifiers );
					break;
				}
			}
			//! Fallthrough intentional
			case TokType::Identifier :
			case TokType::Spec_Const :
			case TokType::Type_Unsigned :
			case TokType::Type_Signed :
			case TokType::Type_Short :
			case TokType::Type_Long :
			case TokType::Type_char :
			case TokType::Type_int :
			case TokType::Type_double :
			{
				if ( nexttok.Type == TokType::Capture_Start && name.Length && currtok.Type == TokType::Identifier )
				{
					if ( str_compare( name.Text, currtok.Text, name.Length ) == 0 )
					{
						member = parse_constructor();
						break;
					}
				}

				member = parse_operator_function_or_variable( expects_function, attributes, specifiers );
			}
			break;

			default :
				Token untyped_tok = currtok;

				while ( left && currtok.Type != TokType::BraceCurly_Close )
				{
					untyped_tok.Length = ( ( sptr )currtok.Text + currtok.Length ) - ( sptr )untyped_tok.Text;
					eat( currtok.Type );
				}

				member = untyped_str( untyped_tok );
				break;
		}

		if ( member == Code::Invalid )
		{
			log_failure( "Failed to parse member\n%s", Context.to_string() );
			Context.pop();
			return CodeInvalid;
		}

		result.append( member );
	}

	eat( TokType::BraceCurly_Close );
	Context.pop();
	return result;
}

internal Code parse_class_struct( Parser::TokType which, bool inplace_def = false )
{
	using namespace Parser;

	if ( which != TokType::Decl_Class && which != TokType::Decl_Struct )
	{
		log_failure( "Error, expected class or struct, not %s\n%s", ETokType::to_str( which ), Context.to_string() );
		return CodeInvalid;
	}

	Token name { nullptr, 0, TokType::Invalid };

	AccessSpec     access     = AccessSpec::Default;
	CodeType       parent     = { nullptr };
	CodeBody       body       = { nullptr };
	CodeAttributes attributes = { nullptr };
	ModuleFlag     mflags     = ModuleFlag::None;

	CodeClass result          = CodeInvalid;

	if ( check( TokType::Module_Export ) )
	{
		mflags = ModuleFlag::Export;
		eat( TokType::Module_Export );
	}

	eat( which );

	attributes = parse_attributes();

	if ( check( TokType::Identifier ) )
	{
		name                = parse_identifier();
		Context.Scope->Name = name;
	}

	local_persist char interface_arr_mem[ kilobytes( 4 ) ] { 0 };
	Array< CodeType >  interfaces = Array< CodeType >::init_reserve( Arena::init_from_memory( interface_arr_mem, kilobytes( 4 ) ), 4 );

	if ( check( TokType::Assign_Classifer ) )
	{
		eat( TokType::Assign_Classifer );

		if ( currtok.is_access_specifier() )
		{
			access = currtok.to_access_specifier();
		}

		Token parent_tok = parse_identifier();
		parent           = def_type( parent_tok );

		while ( check( TokType::Comma ) )
		{
			eat( TokType::Access_Public );

			if ( currtok.is_access_specifier() )
			{
				eat( currtok.Type );
			}

			Token interface_tok = parse_identifier();

			interfaces.append( def_type( interface_tok ) );
		}
	}

	if ( check( TokType::BraceCurly_Open ) )
	{
		body = parse_class_struct_body( which, name );
	}

	CodeComment inline_cmt = NoCode;
	if ( ! inplace_def )
	{
		Token stmt_end = currtok;
		eat( TokType::Statement_End );

		if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
			inline_cmt = parse_comment();
	}

	if ( which == TokType::Decl_Class )
		result = def_class( name, body, parent, access, attributes, mflags );

	else
		result = def_struct( name, body, ( CodeType )parent, access, attributes, mflags );

	if ( inline_cmt )
		result->InlineCmt = inline_cmt;

	interfaces.free();
	return result;
}

internal inline CodeDefine parse_define()
{
	using namespace Parser;
	push_scope();

	eat( TokType::Preprocess_Define );

	CodeDefine define = ( CodeDefine )make_code();
	define->Type      = ECode::Preprocess_Define;

	if ( ! check( TokType::Identifier ) )
	{
		log_failure( "Error, expected identifier after #define\n%s", Context.to_string() );
		Context.pop();
		return CodeInvalid;
	}

	Context.Scope->Name = currtok;
	define->Name        = get_cached_string( currtok );
	eat( TokType::Identifier );

	if ( ! check( TokType::Preprocess_Content ) )
	{
		log_failure( "Error, expected content after #define %s\n%s", define->Name, Context.to_string() );
		Context.pop();
		return CodeInvalid;
	}

	if ( currtok.Length == 0 )
	{
		define->Content = get_cached_string( currtok );
		eat( TokType::Preprocess_Content );

		Context.pop();
		return define;
	}

	define->Content = get_cached_string( strip_formatting( currtok, strip_formatting_dont_preserve_newlines ) );
	eat( TokType::Preprocess_Content );

	Context.pop();
	return define;
}

internal inline Code parse_foward_or_definition( Parser::TokType which, bool is_inplace )
{
	using namespace Parser;

	Code result = CodeInvalid;

	switch ( which )
	{
		case TokType::Decl_Class :
			result = parse_class( is_inplace );
			Context.pop();
			return result;

		case TokType::Decl_Enum :
			result = parse_enum( is_inplace );
			Context.pop();
			return result;

		case TokType::Decl_Struct :
			result = parse_struct( is_inplace );
			Context.pop();
			return result;

		case TokType::Decl_Union :
			result = parse_union( is_inplace );
			Context.pop();
			return result;

		default :
			log_failure(
			"Error, wrong token type given to parse_complicated_definition "
			"(only supports class, enum, struct, union) \n%s",
			Context.to_string()
			);

			Context.pop();
			return CodeInvalid;
	}

	return CodeInvalid;
}

// Function parsing is handled in multiple places because its initial signature is shared with variable parsing
internal inline CodeFn
parse_function_after_name( ModuleFlag mflags, CodeAttributes attributes, CodeSpecifiers specifiers, CodeType ret_type, Parser::Token name )
{
	using namespace Parser;
	push_scope();

	CodeParam params = parse_params();

	// These have to be kept separate from the return type's specifiers.
	while ( left && currtok.is_specifier() )
	{
		if ( specifiers.ast == nullptr )
		{
			specifiers = def_specifier( ESpecifier::to_type( currtok ) );
			eat( currtok.Type );
			continue;
		}

		specifiers.append( ESpecifier::to_type( currtok ) );
		eat( currtok.Type );
	}

	CodeBody    body       = NoCode;
	CodeComment inline_cmt = NoCode;
	if ( check( TokType::BraceCurly_Open ) )
	{
		body = parse_function_body();
		if ( body == Code::Invalid )
		{
			Context.pop();
			return CodeInvalid;
		}
	}
	else
	{
		Token stmt_end = currtok;
		eat( TokType::Statement_End );

		if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
			inline_cmt = parse_comment();
	}

	using namespace ECode;



	String name_stripped = String::make( GlobalAllocator, name );
	name_stripped.strip_space();

	CodeFn result       = ( CodeFn )make_code();
	result->Name        = get_cached_string( name_stripped );
	result->ModuleFlags = mflags;

	if ( body )
	{
		switch ( body->Type )
		{
			case Function_Body :
			case Untyped :
				break;

			default :
			{
				log_failure( "Body must be either of Function_Body or Untyped type, %s\n%s", body.debug_str(), Context.to_string() );
				Context.pop();
				return CodeInvalid;
			}
		}

		result->Type = Function;
		result->Body = body;
	}
	else
	{
		result->Type = Function_Fwd;
	}

	if ( specifiers )
		result->Specs = specifiers;

	result->ReturnType = ret_type;

	if ( params )
		result->Params = params;

	if ( inline_cmt )
		result->InlineCmt = inline_cmt;

	Context.pop();
	return result;
}

internal Code parse_function_body()
{
	using namespace Parser;
	using namespace ECode;
	push_scope();

	eat( TokType::BraceCurly_Open );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = Function_Body;

	// TODO : Support actual parsing of function body
	Token start = currtok;

	s32 level   = 0;
	while ( left && ( currtok.Type != TokType::BraceCurly_Close || level > 0 ) )
	{
		if ( currtok.Type == TokType::BraceCurly_Open )
			level++;

		else if ( currtok.Type == TokType::BraceCurly_Close && level > 0 )
			level--;

		eat( currtok.Type );
	}

	Token previous = prevtok;

	s32 len        = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )start.Text;

	if ( len > 0 )
	{
		result.append( def_execution( { len, start.Text } ) );
	}

	eat( TokType::BraceCurly_Close );

	Context.pop();
	return result;
}

internal neverinline CodeBody parse_global_nspace( CodeT which )
{
	using namespace Parser;
	using namespace ECode;

	if ( which != Namespace_Body && which != Global_Body && which != Export_Body && which != Extern_Linkage_Body )
		return CodeInvalid;

	if ( which != Global_Body )
		eat( TokType::BraceCurly_Open );

	CodeBody result = ( CodeBody )make_code();
	result->Type    = which;

	while ( left && currtok_noskip.Type != TokType::BraceCurly_Close )
	{
		Code           member     = Code::Invalid;
		CodeAttributes attributes = { nullptr };
		CodeSpecifiers specifiers = { nullptr };

		bool expects_function     = false;

		Context.Scope->Start      = currtok_noskip;

		if ( currtok_noskip.Type == TokType::Preprocess_Hash )
			eat( TokType::Preprocess_Hash );

		switch ( currtok_noskip.Type )
		{
			case TokType::NewLine :
				// Empty lines are auto skipped by Tokens.current()
				member = fmt_newline;
				eat( TokType::NewLine );
				break;

			case TokType::Comment :
				member = parse_comment();
				break;

			case TokType::Decl_Class :
				member = parse_complicated_definition( TokType::Decl_Class );
				break;

			case TokType::Decl_Enum :
				member = parse_complicated_definition( TokType::Decl_Enum );
				break;

			case TokType::Decl_Extern_Linkage :
				if ( which == Extern_Linkage_Body )
					log_failure( "Nested extern linkage\n%s", Context.to_string() );

				member = parse_extern_link_body();
				break;

			case TokType::Decl_Namespace :
				member = parse_namespace();
				break;

			case TokType::Decl_Struct :
				member = parse_complicated_definition( TokType::Decl_Struct );
				break;

			case TokType::Decl_Template :
				member = parse_template();
				break;

			case TokType::Decl_Typedef :
				member = parse_typedef();
				break;

			case TokType::Decl_Union :
				member = parse_complicated_definition( TokType::Decl_Union );
				break;

			case TokType::Decl_Using :
				member = parse_using();
				break;

			case TokType::Preprocess_Define :
				member = parse_define();
				break;

			case TokType::Preprocess_Include :
				member = parse_include();
				break;

			case TokType::Preprocess_If :
			case TokType::Preprocess_IfDef :
			case TokType::Preprocess_IfNotDef :
			case TokType::Preprocess_ElIf :
				member = parse_preprocess_cond();
				break;

			case TokType::Preprocess_Macro :
				member = parse_simple_preprocess( TokType::Preprocess_Macro );
				break;

			case TokType::Preprocess_Pragma :
				member = parse_pragma();
				break;

			case TokType::Preprocess_Else :
				member = preprocess_else;
				eat( TokType::Preprocess_Else );
				break;

			case TokType::Preprocess_EndIf :
				member = preprocess_endif;
				eat( TokType::Preprocess_EndIf );
				break;

			case TokType::Preprocess_Unsupported :
				member = parse_simple_preprocess( TokType::Preprocess_Unsupported );
				break;

			case TokType::StaticAssert :
				member = parse_static_assert();
				break;

			case TokType::Module_Export :
				if ( which == Export_Body )
					log_failure( "Nested export declaration\n%s", Context.to_string() );

				member = parse_export_body();
				break;

			case TokType::Module_Import :
			{
				not_implemented( context );
			}
			//! Fallthrough intentional
			case TokType::Decl_GNU_Attribute :
			case TokType::Decl_MSVC_Attribute :
#define Entry( attribute, str ) case TokType::attribute :
				GEN_DEFINE_ATTRIBUTE_TOKENS
#undef Entry
				{
					attributes = parse_attributes();
				}
			//! Fallthrough intentional
			case TokType::Spec_Consteval :
			case TokType::Spec_Constexpr :
			case TokType::Spec_Constinit :
			case TokType::Spec_Extern :
			case TokType::Spec_ForceInline :
			case TokType::Spec_Global :
			case TokType::Spec_Inline :
			case TokType::Spec_Internal_Linkage :
			case TokType::Spec_NeverInline :
			case TokType::Spec_Static :
			{
				SpecifierT specs_found[ 16 ] { ESpecifier::NumSpecifiers };
				s32        NumSpecifiers = 0;

				while ( left && currtok.is_specifier() )
				{
					SpecifierT spec  = ESpecifier::to_type( currtok );

					bool ignore_spec = false;

					switch ( spec )
					{
						case ESpecifier::Constexpr :
						case ESpecifier::Constinit :
						case ESpecifier::ForceInline :
						case ESpecifier::Global :
						case ESpecifier::External_Linkage :
						case ESpecifier::Internal_Linkage :
						case ESpecifier::Inline :
						case ESpecifier::Mutable :
						case ESpecifier::NeverInline :
						case ESpecifier::Static :
						case ESpecifier::Volatile :
							break;

						case ESpecifier::Consteval :
							expects_function = true;
							break;

						case ESpecifier::Const :
							ignore_spec = true;
							break;

						default :
							StrC spec_str = ESpecifier::to_str( spec );

							log_failure( "Invalid specifier %.*s for variable\n%s", spec_str.Len, spec_str, Context.to_string() );
							return CodeInvalid;
					}

					if ( ignore_spec )
						break;

					specs_found[ NumSpecifiers ] = spec;
					NumSpecifiers++;
					eat( currtok.Type );
				}

				if ( NumSpecifiers )
				{
					specifiers = def_specifiers( NumSpecifiers, specs_found );
				}
			}
			//! Fallthrough intentional
			case TokType::Identifier :
			case TokType::Spec_Const :
			case TokType::Type_Long :
			case TokType::Type_Short :
			case TokType::Type_Signed :
			case TokType::Type_Unsigned :
			case TokType::Type_char :
			case TokType::Type_double :
			case TokType::Type_int :
			{
				bool found_operator_cast = false;
				s32  idx                 = Context.Tokens.Idx;

				for ( ; idx < Context.Tokens.Arr.num(); idx++ )
				{
					Token tok = Context.Tokens[ idx ];

					if ( tok.Type == TokType::Identifier )
					{
						idx++;
						tok = Context.Tokens[ idx ];
						if ( tok.Type == TokType::Access_StaticSymbol )
							continue;

						break;
					}

					if ( tok.Type == TokType::Decl_Operator )
						found_operator_cast = true;

					break;
				}

				if ( found_operator_cast )
				{
					member = parse_operator_cast();
					break;
				}

				member = parse_operator_function_or_variable( expects_function, attributes, specifiers );
			}
		}

		if ( member == Code::Invalid )
		{
			log_failure( "Failed to parse member\n%s", Context.to_string() );
			return CodeInvalid;
		}

		// log_fmt("Global Body Member: %s", member->debug_str());
		result.append( member );
	}

	if ( which != Global_Body )
		eat( TokType::BraceCurly_Close );

	return result;
}

internal Parser::Token parse_identifier( bool* possible_member_function )
{
	using namespace Parser;
	push_scope();

	Token name          = currtok;
	Context.Scope->Name = name;
	eat( TokType::Identifier );

	parse_template_args( name );

	while ( check( TokType::Access_StaticSymbol ) )
	{
		eat( TokType::Access_StaticSymbol );

		if ( left == 0 )
		{
			log_failure( "Error, unexpected end of static symbol identifier\n%s", Context.to_string() );
			Context.pop();
			return { nullptr, 0, TokType::Invalid };
		}

		if ( currtok.Type == TokType::Operator && currtok.Text[ 0 ] == '*' && currtok.Length == 1 )
		{
			if ( possible_member_function )
				*possible_member_function = true;

			else
			{
				log_failure( "Found a member function pointer identifier but the parsing context did not expect it\n%s", Context.to_string() );
				Context.pop();
				return { nullptr, 0, TokType::Invalid };
			}
		}

		if ( currtok.Type != TokType::Identifier )
		{
			log_failure( "Error, expected static symbol identifier, not %s\n%s", ETokType::to_str( currtok.Type ), Context.to_string() );
			Context.pop();
			return { nullptr, 0, TokType::Invalid };
		}

		name.Length = ( ( sptr )currtok.Text + currtok.Length ) - ( sptr )name.Text;
		eat( TokType::Identifier );

		parse_template_args( name );
	}

	Context.pop();
	return name;
}

internal CodeInclude parse_include()
{
	using namespace Parser;
	push_scope();

	CodeInclude include = ( CodeInclude )make_code();
	include->Type       = ECode::Preprocess_Include;
	eat( TokType::Preprocess_Include );

	if ( ! check( TokType::String ) )
	{
		log_failure( "Error, expected include string after #include\n%s", Context.to_string() );
		Context.pop();
		return CodeInvalid;
	}

	Context.Scope->Name = currtok;
	include->Content    = get_cached_string( currtok );
	eat( TokType::String );

	Context.pop();
	return include;
}

internal CodeOperator parse_operator_after_ret_type( ModuleFlag mflags, CodeAttributes attributes, CodeSpecifiers specifiers, CodeType ret_type )
{
	using namespace Parser;
	using namespace EOperator;
	push_scope();

	Token nspace = NullToken;
	if ( check( TokType::Identifier ) )
	{
		nspace = currtok;
		while ( left && currtok.Type == TokType::Identifier )
		{
			eat( TokType::Identifier );

			if ( currtok.Type == TokType::Access_StaticSymbol )
				eat( TokType::Access_StaticSymbol );
		}

		nspace.Length = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )nspace.Text;
	}

	eat( TokType::Decl_Operator );

	if ( ! left && currtok.Type != TokType::Operator && currtok.Type != TokType::Star && currtok.Type != TokType::Ampersand && currtok.Type != TokType::Ampersand_DBL )
	{
		log_failure( "Expected operator after 'operator' keyword\n%s", Context.to_string() );
		Context.pop();
		return CodeInvalid;
	}

	Context.Scope->Name = currtok;

	OperatorT op        = Invalid;
	switch ( currtok.Text[ 0 ] )
	{
		case '+' :
		{
			if ( currtok.Text[ 1 ] == '=' )
				op = Assign_Add;

			if ( currtok.Text[ 1 ] == '+' )
				op = Increment;

			else
				op = Add;
		}
		break;
		case '-' :
		{
			if ( currtok.Text[ 1 ] == '>' )
			{
				if ( currtok.Text[ 2 ] == '*' )
					op = MemberOfPointer;

				else
					op = MemberOfPointer;

				break;
			}

			if ( currtok.Text[ 1 ] == '=' )
				op = Assign_Subtract;

			else
				op = Subtract;
		}
		break;
		case '*' :
		{
			if ( currtok.Text[ 1 ] == '=' )
				op = Assign_Multiply;

			else
			{
				Token& finder = prevtok;
				while ( finder.Type != TokType::Decl_Operator )
				{
					if ( finder.Type == TokType::Identifier )
					{
						op = Indirection;
						break;
					}
				}

				if ( op == Invalid )
					op = Multiply;
			}
		}
		break;
		case '/' :
		{
			if ( currtok.Text[ 1 ] == '=' )
				op = Assign_Divide;

			else
				op = Divide;
		}
		break;
		case '%' :
		{
			if ( currtok.Text[ 1 ] == '=' )
				op = Assign_Modulo;

			else
				op = Modulo;
		}
		break;
		case '&' :
		{
			if ( currtok.Text[ 1 ] == '=' )
				op = Assign_BAnd;

			else if ( currtok.Text[ 1 ] == '&' )
				op = LAnd;

			else
			{


				if ( op == Invalid )
					op = BAnd;
			}
		}
		break;
		case '|' :
		{
			if ( currtok.Text[ 1 ] == '=' )
				op = Assign_BOr;

			else if ( currtok.Text[ 1 ] == '|' )
				op = LOr;

			else
				op = BOr;
		}
		break;
		case '^' :
		{
			if ( currtok.Text[ 1 ] == '=' )
				op = Assign_BXOr;

			else
				op = BXOr;
		}
		break;
		case '~' :
		{
			op = BNot;
		}
		break;
		case '!' :
		{
			if ( currtok.Text[ 1 ] == '=' )
				op = LNot;

			else
				op = UnaryNot;
		}
		break;
		case '=' :
		{
			if ( currtok.Text[ 1 ] == '=' )
				op = LEqual;

			else
				op = Assign;
		}
		break;
		case '<' :
		{
			if ( currtok.Text[ 1 ] == '=' )
				op = LEqual;

			else if ( currtok.Text[ 1 ] == '<' )
			{
				if ( currtok.Text[ 2 ] == '=' )
					op = Assign_LShift;

				else
					op = LShift;
			}
			else
				op = Lesser;
		}
		break;
		case '>' :
		{
			if ( currtok.Text[ 1 ] == '=' )
				op = GreaterEqual;

			else if ( currtok.Text[ 1 ] == '>' )
			{
				if ( currtok.Text[ 2 ] == '=' )
					op = Assign_RShift;

				else
					op = RShift;
			}
			else
				op = Greater;
		}
		break;
		case '(' :
		{
			if ( currtok.Text[ 1 ] == ')' )
				op = FunctionCall;

			else
				op = Invalid;
		}
		break;
		case '[' :
		{
			if ( currtok.Text[ 1 ] == ']' )
				op = Subscript;

			else
				op = Invalid;
		}
		break;
		default :
		{
			break;
		}
	}

	if ( op == Invalid )
	{
		log_failure( "Invalid operator '%s'\n%s", currtok.Text, Context.to_string() );
		Context.pop();
		return CodeInvalid;
	}

	eat( currtok.Type );

	// Parse Params
	CodeParam params = parse_params();

	if ( params.ast == nullptr && op == EOperator::Multiply )
		op = MemberOfPointer;

	while ( left && currtok.is_specifier() )
	{
		if ( specifiers.ast == nullptr )
		{
			specifiers = def_specifier( ESpecifier::to_type( currtok ) );
			eat( currtok.Type );
			continue;
		}

		specifiers.append( ESpecifier::to_type( currtok ) );
		eat( currtok.Type );
	}

	// Parse Body
	CodeBody    body       = { nullptr };
	CodeComment inline_cmt = NoCode;
	if ( check( TokType::BraceCurly_Open ) )
	{
		body = parse_function_body();
		if ( body == Code::Invalid )
		{
			Context.pop();
			return CodeInvalid;
		}
	}
	else
	{
		Token stmt_end = currtok;
		eat( TokType::Statement_End );

		if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
			inline_cmt = parse_comment();
	}

	// OpValidateResult check_result = operator__validate( op, params, ret_type, specifiers );
	CodeOperator result = def_operator( op, nspace, params, ret_type, body, specifiers, attributes, mflags );

	if ( inline_cmt )
		result->InlineCmt = inline_cmt;

	Context.pop();
	return result;
}

internal Code parse_operator_function_or_variable( bool expects_function, CodeAttributes attributes, CodeSpecifiers specifiers )
{
	using namespace Parser;
	push_scope();

	Code result = CodeInvalid;

#ifndef GEN_PARSER_DISABLE_MACRO_FUNCTION_SIGNATURES
	if ( currtok.Type == TokType::Preprocess_Macro )
	{
		// Were dealing with a macro after attributes/specifiers.
		result = parse_simple_preprocess( TokType::Preprocess_Macro );
		Context.pop();
		return result;
	}
#endif

	CodeType type = parse_type();

	if ( type == CodeInvalid )
	{
		Context.pop();
		return CodeInvalid;
	}

	bool found_operator = false;
	s32  idx            = Context.Tokens.Idx;

	for ( ; idx < Context.Tokens.Arr.num(); idx++ )
	{
		Token tok = Context.Tokens[ idx ];

		if ( tok.Type == TokType::Identifier )
		{
			idx++;
			tok = Context.Tokens[ idx ];
			if ( tok.Type == TokType::Access_StaticSymbol )
				continue;

			break;
		}

		if ( tok.Type == TokType::Decl_Operator )
			found_operator = true;

		break;
	}

	if ( found_operator )
	{
		// Dealing with an operator overload
		result = parse_operator_after_ret_type( ModuleFlag::None, attributes, specifiers, type );
	}
	else
	{
		Token name          = parse_identifier();
		Context.Scope->Name = name;

		if ( check( TokType::Capture_Start ) )
		{
			// Dealing with a function
			result = parse_function_after_name( ModuleFlag::None, attributes, specifiers, type, name );
		}
		else
		{
			if ( expects_function )
			{
				log_failure( "Expected function declaration (consteval was used)\n%s", Context.to_string() );
				Context.pop();
				return CodeInvalid;
			}

			// Dealing with a variable
			result = parse_variable_after_name( ModuleFlag::None, attributes, specifiers, type, name );
		}
	}

	Context.pop();
	return result;
}

internal CodePragma parse_pragma()
{
	using namespace Parser;
	push_scope();

	CodePragma pragma = ( CodePragma )make_code();
	pragma->Type      = ECode::Preprocess_Pragma;
	eat( TokType::Preprocess_Pragma );

	if ( ! check( TokType::Preprocess_Content ) )
	{
		log_failure( "Error, expected content after #pragma\n%s", Context.to_string() );
		Context.pop();
		return CodeInvalid;
	}

	Context.Scope->Name = currtok;

	pragma->Content     = get_cached_string( currtok );
	eat( TokType::Preprocess_Content );

	Context.pop();
	return pragma;
}

internal inline CodeParam parse_params( bool use_template_capture )
{
	using namespace Parser;
	using namespace ECode;
	push_scope();

	if ( ! use_template_capture )
		eat( TokType::Capture_Start );

	else
	{
		if ( check( TokType::Operator ) && currtok.Text[ 0 ] == '<' )
			eat( TokType::Operator );
	}

	if ( ! use_template_capture && check( TokType::Capture_End ) )
	{
		eat( TokType::Capture_End );
		Context.pop();
		return { nullptr };
	}

	CodeType type  = { nullptr };
	Code     value = { nullptr };

	if ( check( TokType::Varadic_Argument ) )
	{
		eat( TokType::Varadic_Argument );

		Context.pop();
		return param_varadic;
	}

	type = parse_type();
	if ( type == Code::Invalid )
	{
		Context.pop();
		return CodeInvalid;
	}

	Token name = NullToken;

	if ( check( TokType::Identifier ) )
	{
		name = currtok;
		eat( TokType::Identifier );

		if ( currtok.IsAssign )
		{
			eat( TokType::Operator );

			Token value_tok = currtok;

			if ( currtok.Type == TokType::Comma )
			{
				log_failure( "Expected value after assignment operator\n%s.", Context.to_string() );
				Context.pop();
				return CodeInvalid;
			}

			while ( left && currtok.Type != TokType::Comma && currtok.Type != TokType::Capture_End )
			{
				value_tok.Length = ( ( sptr )currtok.Text + currtok.Length ) - ( sptr )value_tok.Text;
				eat( currtok.Type );
			}

			value = untyped_str( strip_formatting( value_tok, strip_formatting_dont_preserve_newlines ) );
		}
	}

	CodeParam result = ( CodeParam )make_code();
	result->Type     = Parameters;

	if ( name.Length > 0 )
		result->Name = get_cached_string( name );

	result->ValueType = type;

	if ( value )
		result->Value = value;

	result->NumEntries++;

	while ( left && use_template_capture ? currtok.Type != TokType::Operator && currtok.Text[ 0 ] != '>' : currtok.Type != TokType::Capture_End )
	{
		eat( TokType::Comma );

		Code type  = { nullptr };
		Code value = { nullptr };

		if ( check( TokType::Varadic_Argument ) )
		{
			eat( TokType::Varadic_Argument );
			result.append( param_varadic );
			continue;
		}

		type = parse_type();
		if ( type == Code::Invalid )
		{
			Context.pop();
			return CodeInvalid;
		}

		name = { nullptr, 0, TokType::Invalid, false };

		if ( check( TokType::Identifier ) )
		{
			name = currtok;
			eat( TokType::Identifier );

			if ( currtok.IsAssign )
			{
				eat( TokType::Operator );

				Token value_tok = currtok;

				if ( currtok.Type == TokType::Comma )
				{
					log_failure( "Expected value after assignment operator\n%s", Context.to_string() );
					Context.pop();
					return CodeInvalid;
				}

				while ( left && currtok.Type != TokType::Comma && currtok.Type != TokType::Capture_End )
				{
					value_tok.Length = ( ( sptr )currtok.Text + currtok.Length ) - ( sptr )value_tok.Text;
					eat( currtok.Type );
				}

				value = untyped_str( strip_formatting( value_tok, strip_formatting_dont_preserve_newlines ) );
			}
		}

		CodeParam param = ( CodeParam )make_code();
		param->Type     = Parameters;

		if ( name.Length > 0 )
			param->Name = get_cached_string( name );

		param->ValueType = type;

		if ( value )
			param->Value = value;

		result.append( param );
	}

	if ( ! use_template_capture )
		eat( TokType::Capture_End );

	else
	{
		if ( ! check( TokType::Operator ) || currtok.Text[ 0 ] != '>' )
		{
			log_failure( "Expected '<' after 'template' keyword\n%s", Context.to_string() );
			Context.pop();
			return CodeInvalid;
		}
		eat( TokType::Operator );
	}

	Context.pop();
	return result;
#undef context
}

internal CodePreprocessCond parse_preprocess_cond()
{
	using namespace Parser;
	push_scope();

	if ( ! currtok.is_preprocess_cond() )
	{
		log_failure( "Error, expected preprocess conditional\n%s", Context.to_string() );
		Context.pop();
		return CodeInvalid;
	}

	CodePreprocessCond cond = ( CodePreprocessCond )make_code();
	cond->Type              = scast( CodeT, currtok.Type - ( ETokType::Preprocess_If - ECode::Preprocess_If ) );
	eat( currtok.Type );

	if ( ! check( TokType::Preprocess_Content ) )
	{
		log_failure( "Error, expected content after #define\n%s", Context.to_string() );
		Context.pop();
		return CodeInvalid;
	}

	Context.Scope->Name = currtok;
	cond->Content       = get_cached_string( currtok );
	eat( TokType::Preprocess_Content );

	Context.pop();
	return cond;
}

internal inline Code parse_simple_preprocess( Parser::TokType which )
{
	using namespace Parser;
	push_scope();

	Token tok = currtok;
	eat( which );

	if ( currtok.Type == TokType::BraceCurly_Open )
	{
		// Eat the block scope right after the macro. Were assuming the macro defines a function definition's signature
		eat( TokType::BraceCurly_Open );

		s32 level = 0;
		while ( left && ( currtok.Type != TokType::BraceCurly_Close || level > 0 ) )
		{
			if ( currtok.Type == TokType::BraceCurly_Open )
				level++;

			else if ( currtok.Type == TokType::BraceCurly_Close && level > 0 )
				level--;

			eat( currtok.Type );
		}
		eat( TokType::BraceCurly_Close );

		StrC prev_proc = Context.Scope->Prev->ProcName;
		if ( str_compare( prev_proc.Ptr, "parse_typedef", prev_proc.Len ) != 0 )
		{
			if ( check( TokType::Statement_End ) )
			{
				Token stmt_end = currtok;
				eat( TokType::Statement_End );

				if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
					eat( TokType::Comment );
			}
		}

		tok.Length = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )tok.Text;
	}
	else
	{
		if ( str_compare( Context.Scope->Prev->ProcName.Ptr, "parse_typedef", Context.Scope->Prev->ProcName.Len ) != 0 )
		{
			if ( check( TokType::Statement_End ) )
			{
				Token stmt_end = currtok;
				eat( TokType::Statement_End );

				if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
					eat( TokType::Comment );
			}
		}

		tok.Length = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )tok.Text;
	}

	char const* content = str_fmt_buf( "%.*s ", tok.Length, tok.Text );

	Code result         = untyped_str( to_str( content ) );
	Context.Scope->Name = tok;

	Context.pop();
	return result;
}

internal Code parse_static_assert()
{
	using namespace Parser;
	push_scope();

	Code assert         = make_code();
	assert->Type        = ECode::Untyped;

	Token content       = currtok;

	Context.Scope->Name = content;

	eat( TokType::StaticAssert );
	eat( TokType::Capture_Start );

	s32 level = 0;
	while ( left && ( currtok.Type != TokType::Capture_End || level > 0 ) )
	{
		if ( currtok.Type == TokType::Capture_Start )
			level++;
		else if ( currtok.Type == TokType::Capture_End )
			level--;

		eat( currtok.Type );
	}
	eat( TokType::Capture_End );
	eat( TokType::Statement_End );

	content.Length  = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )content.Text;

	char const* str = str_fmt_buf( "%.*s\n", content.Length, content.Text );
	assert->Content = get_cached_string( { content.Length + 1, str } );
	assert->Name    = assert->Content;

	Context.pop();
	return assert;
}

/*
    This a brute-froce make all the arguments part of the token provided.
    Can have in-place function signatures, regular identifiers, in-place typenames, compile-time expressions, parameter-pack expansion, etc.
    This means that validation can only go so far, and so if there is any different in formatting
    passed the basic stripping supported it report a soft failure.
*/
internal inline void parse_template_args( Parser::Token& token )
{
	using namespace Parser;

	if ( currtok.Type == TokType::Operator && currtok.Text[ 0 ] == '<' && currtok.Length == 1 )
	{
		eat( TokType::Operator );

		s32 level = 0;
		while ( left && ( currtok.Text[ 0 ] != '>' || level > 0 ) )
		{
			if ( currtok.Text[ 0 ] == '<' )
				level++;

			if ( currtok.Text[ 0 ] == '>' )
				level--;

			eat( currtok.Type );
		}

		eat( TokType::Operator );

		// Extend length of name to last token
		token.Length = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )token.Text;
	}
}

// Variable parsing is handled in multiple places because its initial signature is shared with function parsing
internal CodeVar parse_variable_after_name( ModuleFlag mflags, CodeAttributes attributes, CodeSpecifiers specifiers, CodeType type, StrC name )
{
	using namespace Parser;
	push_scope();

	Code array_expr    = parse_array_decl();
	Code expr          = { nullptr };
	Code bitfield_expr = { nullptr };

	if ( currtok.IsAssign )
	{
		eat( TokType::Operator );

		Token expr_tok = currtok;

		if ( currtok.Type == TokType::Statement_End )
		{
			log_failure( "Expected expression after assignment operator\n%s", Context.to_string() );
			Context.pop();
			return CodeInvalid;
		}

		while ( left && currtok.Type != TokType::Statement_End )
		{
			eat( currtok.Type );
		}

		expr_tok.Length = ( ( sptr )currtok.Text + currtok.Length ) - ( sptr )expr_tok.Text - 1;
		expr            = untyped_str( expr_tok );
	}

	if ( currtok.Type == TokType::BraceCurly_Open )
	{
		Token expr_tok = currtok;

		eat( TokType::BraceCurly_Open );

		s32 level = 0;
		while ( left && ( currtok.Type != TokType::BraceCurly_Close || level > 0 ) )
		{
			if ( currtok.Type == TokType::BraceCurly_Open )
				level++;

			else if ( currtok.Type == TokType::BraceCurly_Close && level > 0 )
				level--;

			eat( currtok.Type );
		}
		eat( TokType::BraceCurly_Close );

		expr_tok.Length = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )expr_tok.Text;
		expr            = untyped_str( expr_tok );
	}

	if ( currtok.Type == TokType::Assign_Classifer )
	{
		eat( TokType::Assign_Classifer );

		Token expr_tok = currtok;

		if ( currtok.Type == TokType::Statement_End )
		{
			log_failure( "Expected expression after bitfield \n%s", Context.to_string() );
			Context.pop();
			return CodeInvalid;
		}

		while ( left && currtok.Type != TokType::Statement_End )
		{
			eat( currtok.Type );
		}

		expr_tok.Length = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )expr_tok.Text;
		bitfield_expr   = untyped_str( expr_tok );
	}

	Token stmt_end = currtok;
	eat( TokType::Statement_End );

	// Check for inline comment : <type> <identifier> = <expression>; // <inline comment>
	CodeComment inline_cmt = NoCode;
	if ( left && ( currtok_noskip.Type == TokType::Comment ) && currtok_noskip.Line == stmt_end.Line )
	{
		inline_cmt = parse_comment();
	}

	using namespace ECode;

	CodeVar result      = ( CodeVar )make_code();
	result->Type        = Variable;
	result->Name        = get_cached_string( name );
	result->ModuleFlags = mflags;

	result->ValueType   = type;

	if ( array_expr )
		type->ArrExpr = array_expr;

	if ( bitfield_expr )
		result->BitfieldSize = bitfield_expr;

	if ( attributes )
		result->Attributes = attributes;

	if ( specifiers )
		result->Specs = specifiers;

	if ( expr )
		result->Value = expr;

	if ( inline_cmt )
		result->InlineCmt = inline_cmt;

	Context.pop();
	return result;
}

// Publically Exposed Interface

internal CodeClass parse_class( bool inplace_def )
{
	using namespace Parser;
	push_scope();
	CodeClass result = ( CodeClass )parse_class_struct( Parser::TokType::Decl_Class, inplace_def );
	Context.pop();
	return result;
}

CodeClass parse_class( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
		return CodeInvalid;

	Context.Tokens = toks;
	push_scope();
	CodeClass result = ( CodeClass )parse_class_struct( TokType::Decl_Class );
	Context.pop();
	return result;
}

internal CodeConstructor parse_constructor()
{
	using namespace Parser;
	push_scope();

	Token       identifier       = parse_identifier();
	CodeParam   params           = parse_params();
	Code        initializer_list = NoCode;
	CodeBody    body             = NoCode;
	CodeComment inline_cmt       = NoCode;

	if ( check( TokType::Assign_Classifer ) )
	{
		eat( TokType::Assign_Classifer );

		Token initializer_list_tok = NullToken;

		s32 level                  = 0;
		while ( left && ( currtok.Type != TokType::BraceCurly_Open || level > 0 ) )
		{
			if ( currtok.Type == TokType::BraceCurly_Open )
				level++;
			else if ( currtok.Type == TokType::BraceCurly_Close )
				level--;

			eat( currtok.Type );
		}

		initializer_list_tok.Length = ( ( sptr )currtok.Text + currtok.Length ) - ( sptr )initializer_list_tok.Text;

		initializer_list            = untyped_str( initializer_list_tok );
		body                        = parse_function_body();
	}
	else if ( check( TokType::BraceCurly_Open ) )
	{
		body = parse_function_body();
	}
	else
	{
		Token stmt_end = currtok;
		eat( TokType::Statement_End );

		if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
			inline_cmt = parse_comment();
	}

	CodeConstructor result = ( CodeConstructor )make_code();

	if ( params )
		result->Params = params;

	if ( initializer_list )
		result->InitializerList = initializer_list;

	if ( body )
	{
		result->Body = body;
		result->Type = ECode::Constructor;
	}
	else
		result->Type = ECode::Constructor_Fwd;

	if ( inline_cmt )
		result->InlineCmt = inline_cmt;

	Context.pop();
	return result;
}

CodeConstructor parse_constructor( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
		return CodeInvalid;

	Context.Tokens         = toks;
	CodeConstructor result = parse_constructor();
	return result;
}

internal CodeDestructor parse_destructor( CodeSpecifiers specifiers )
{
	using namespace Parser;
	push_scope();

	if ( check( TokType::Spec_Virtual ) )
	{
		if ( specifiers )
			specifiers.append( ESpecifier::Virtual );
		else
			specifiers = def_specifier( ESpecifier::Virtual );
		eat( TokType::Spec_Virtual );
	}

	if ( left && currtok.Text[ 0 ] == '~' )
		eat( TokType::Operator );
	else
	{
		log_failure( "Expected destructor '~' token\n%s", Context.to_string() );
		return CodeInvalid;
	}

	Token    identifier = parse_identifier();
	CodeBody body       = { nullptr };

	eat( TokType::Capture_Start );
	eat( TokType::Capture_End );

	if ( check( TokType::Operator ) && currtok.Text[ 0 ] == '=' )
	{
		eat( TokType::Operator );

		if ( left && currtok.Text[ 0 ] == '0' )
		{
			eat( TokType::Number );

			specifiers.append( ESpecifier::Pure );
		}
		else
		{
			log_failure( "Pure specifier expected due to '=' token\n%s", Context.to_string() );
			return CodeInvalid;
		}
	}

	CodeComment inline_cmt = NoCode;

	if ( check( TokType::BraceCurly_Open ) )
		body = parse_function_body();
	else
	{
		Token stmt_end = currtok;
		eat( TokType::Statement_End );

		if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
			inline_cmt = parse_comment();
	}

	CodeDestructor result = ( CodeDestructor )make_code();

	if ( specifiers )
		result->Specs = specifiers;

	if ( body )
	{
		result->Body = body;
		result->Type = ECode::Destructor;
	}
	else
		result->Type = ECode::Destructor_Fwd;

	if ( inline_cmt )
		result->InlineCmt = inline_cmt;

	Context.pop();
	return result;
}

CodeDestructor parse_destructor( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
		return CodeInvalid;

	Context.Tokens        = toks;
	CodeDestructor result = parse_destructor();
	return result;
}

internal CodeEnum parse_enum( bool inplace_def )
{
	using namespace Parser;
	using namespace ECode;
	push_scope();

	SpecifierT specs_found[ 16 ] { ESpecifier::NumSpecifiers };
	s32        NumSpecifiers  = 0;

	CodeAttributes attributes = { nullptr };

	Token    name             = { nullptr, 0, TokType::Invalid };
	Code     array_expr       = { nullptr };
	CodeType type             = { nullptr };

	char entries_code[ kilobytes( 128 ) ] { 0 };
	s32  entries_length = 0;

	bool is_enum_class  = false;

	eat( TokType::Decl_Enum );

	if ( currtok.Type == TokType::Decl_Class )
	{
		eat( TokType::Decl_Class );
		is_enum_class = true;
	}

	attributes = parse_attributes();

	if ( check( TokType::Identifier ) )
	{
		name                = currtok;
		Context.Scope->Name = currtok;
		eat( TokType::Identifier );
	}

	if ( currtok.Type == TokType::Assign_Classifer )
	{
		eat( TokType::Assign_Classifer );

		type = parse_type();
		if ( type == Code::Invalid )
		{
			log_failure( "Failed to parse enum classifier\n%s", Context.to_string() );
			Context.pop();
			return CodeInvalid;
		}
	}

	CodeBody body = { nullptr };

	if ( currtok.Type == TokType::BraceCurly_Open )
	{
		body       = ( CodeBody )make_code();
		body->Type = ECode::Enum_Body;

		eat( TokType::BraceCurly_Open );

		Code member = CodeInvalid;

		while ( left && currtok_noskip.Type != TokType::BraceCurly_Close )
		{
			if ( currtok_noskip.Type == TokType::Preprocess_Hash )
				eat( TokType::Preprocess_Hash );

			switch ( currtok_noskip.Type )
			{
				case TokType::NewLine :
					member = untyped_str( currtok_noskip );
					eat( TokType::NewLine );
					break;

				case TokType::Comment :
					member = parse_comment();
					break;

				case TokType::Preprocess_Define :
					member = parse_define();
					break;

				case TokType::Preprocess_If :
				case TokType::Preprocess_IfDef :
				case TokType::Preprocess_IfNotDef :
				case TokType::Preprocess_ElIf :
					member = parse_preprocess_cond();
					break;

				case TokType::Preprocess_Else :
					member = preprocess_else;
					eat( TokType::Preprocess_Else );
					break;

				case TokType::Preprocess_EndIf :
					member = preprocess_endif;
					eat( TokType::Preprocess_EndIf );
					break;

				case TokType::Preprocess_Macro :
					member = parse_simple_preprocess( TokType::Preprocess_Macro );
					break;

				case TokType::Preprocess_Pragma :
					member = parse_pragma();
					break;

				case TokType::Preprocess_Unsupported :
					member = parse_simple_preprocess( TokType::Preprocess_Unsupported );
					break;

				default :
					Token entry = currtok;

					eat( TokType::Identifier );

					if ( currtok.Type == TokType::Operator && currtok.Text[ 0 ] == '=' )
					{
						eat( TokType::Operator );

						while ( currtok_noskip.Type != TokType::Comma && currtok_noskip.Type != TokType::BraceCurly_Close )
						{
							eat( currtok_noskip.Type );
						}
					}

					if ( currtok.Type == TokType::Comma )
					{
						eat( TokType::Comma );
					}

					entry.Length = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )entry.Text;

					member       = untyped_str( entry );
					break;
			}

			if ( member == Code::Invalid )
			{
				log_failure( "Failed to parse member\n%s", Context.to_string() );
				Context.pop();
				return CodeInvalid;
			}

			body.append( member );
		}

		eat( TokType::BraceCurly_Close );
	}

	CodeComment inline_cmt = NoCode;

	if ( ! inplace_def )
	{
		Token stmt_end = currtok;
		eat( TokType::Statement_End );

		if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
			inline_cmt = parse_comment();
	}

	using namespace ECode;

	CodeEnum result = ( CodeEnum )make_code();

	if ( body.ast )
	{
		result->Type = is_enum_class ? Enum_Class : Enum;
		result->Body = body;
	}
	else
	{
		result->Type = is_enum_class ? Enum_Class_Fwd : Enum_Fwd;
	}

	result->Name = get_cached_string( name );

	if ( attributes )
		result->Attributes = attributes;

	if ( type )
		result->UnderlyingType = type;

	if ( inline_cmt )
		result->InlineCmt = inline_cmt;

	Context.pop();
	return result;
}

CodeEnum parse_enum( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
	{
		Context.pop();
		return CodeInvalid;
	}

	Context.Tokens = toks;
	return parse_enum();
}

internal inline CodeBody parse_export_body()
{
	using namespace Parser;
	push_scope();
	CodeBody result = parse_global_nspace( ECode::Export_Body );
	Context.pop();
	return result;
}

CodeBody parse_export_body( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
		return CodeInvalid;

	Context.Tokens = toks;
	return parse_export_body();
}

internal inline CodeBody parse_extern_link_body()
{
	using namespace Parser;
	push_scope();
	CodeBody result = parse_global_nspace( ECode::Extern_Linkage_Body );
	Context.pop();
	return result;
}

internal CodeExtern parse_extern_link()
{
	using namespace Parser;
	push_scope();

	eat( TokType::Decl_Extern_Linkage );

	Token name = currtok;
	eat( TokType::String );

	name.Text         += 1;
	name.Length       -= 1;

	CodeExtern result  = ( CodeExtern )make_code();
	result->Type       = ECode::Extern_Linkage;
	result->Name       = get_cached_string( name );

	Code entry         = parse_extern_link_body();
	if ( entry == Code::Invalid )
	{
		log_failure( "Failed to parse body\n%s", Context.to_string() );
		Context.pop();
		return result;
	}

	result->Body = entry;

	Context.pop();
	return result;
}

CodeExtern parse_extern_link( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
		return CodeInvalid;

	Context.Tokens = toks;
	return parse_extern_link();
}

internal CodeFriend parse_friend()
{
	using namespace Parser;
	using namespace ECode;
	push_scope();

	eat( TokType::Decl_Friend );

	CodeFn function = { nullptr };

	// Type declaration or return type
	CodeType type = parse_type();
	if ( type == Code::Invalid )
	{
		Context.pop();
		return CodeInvalid;
	}

	// Funciton declaration
	if ( currtok.Type == TokType::Identifier )
	{
		// Name
		Token name          = parse_identifier();
		Context.Scope->Name = name;

		// Parameter list
		CodeParam params     = parse_params();

		function             = make_code();
		function->Type       = Function_Fwd;
		function->Name       = get_cached_string( name );
		function->ReturnType = type;

		if ( params )
			function->Params = params;
	}

	Token stmt_end = currtok;
	eat( TokType::Statement_End );

	CodeComment inline_cmt = NoCode;
	if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
		inline_cmt = parse_comment();

	CodeFriend result = ( CodeFriend )make_code();
	result->Type      = Friend;

	if ( function )
		result->Declaration = function;

	else
		result->Declaration = type;

	if ( inline_cmt )
		result->InlineCmt = inline_cmt;

	Context.pop();
	return result;
}

CodeFriend parse_friend( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
		return CodeInvalid;

	Context.Tokens = toks;
	return parse_friend();
}

internal CodeFn parse_functon()
{
	using namespace Parser;
	push_scope();

	SpecifierT specs_found[ 16 ] { ESpecifier::NumSpecifiers };
	s32        NumSpecifiers  = 0;

	CodeAttributes attributes = { nullptr };
	CodeSpecifiers specifiers = { nullptr };
	ModuleFlag     mflags     = ModuleFlag::None;

	if ( check( TokType::Module_Export ) )
	{
		mflags = ModuleFlag::Export;
		eat( TokType::Module_Export );
	}

	attributes = parse_attributes();

	while ( left && currtok.is_specifier() )
	{
		SpecifierT spec = ESpecifier::to_type( currtok );

		switch ( spec )
		{
			case ESpecifier::Const :
			case ESpecifier::Consteval :
			case ESpecifier::Constexpr :
			case ESpecifier::External_Linkage :
			case ESpecifier::ForceInline :
			case ESpecifier::Inline :
			case ESpecifier::NeverInline :
			case ESpecifier::Static :
				break;

			default :
				log_failure( "Invalid specifier %s for functon\n%s", ESpecifier::to_str( spec ), Context.to_string() );
				Context.pop();
				return CodeInvalid;
		}

		if ( spec == ESpecifier::Const )
			continue;

		specs_found[ NumSpecifiers ] = spec;
		NumSpecifiers++;
		eat( currtok.Type );
	}

	if ( NumSpecifiers )
	{
		specifiers = def_specifiers( NumSpecifiers, specs_found );
	}

	CodeType ret_type = parse_type();
	if ( ret_type == Code::Invalid )
	{
		Context.pop();
		return CodeInvalid;
	}

	Token name          = parse_identifier();
	Context.Scope->Name = name;
	if ( ! name )
	{
		Context.pop();
		return CodeInvalid;
	}

	CodeFn result = parse_function_after_name( mflags, attributes, specifiers, ret_type, name );

	Context.pop();
	return result;
}

CodeFn parse_function( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
		return CodeInvalid;

	Context.Tokens = toks;
	return ( CodeFn )parse_functon();
}

CodeBody parse_global_body( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
		return CodeInvalid;

	Context.Tokens = toks;
	push_scope();
	CodeBody result = parse_global_nspace( ECode::Global_Body );
	Context.pop();
	return result;
}

internal CodeNS parse_namespace()
{
	using namespace Parser;
	push_scope();

	eat( TokType::Decl_Namespace );

	Token name          = parse_identifier();
	Context.Scope->Name = name;

	CodeBody body       = parse_global_nspace( ECode::Namespace_Body );
	if ( body == Code::Invalid )
	{
		Context.pop();
		return CodeInvalid;
	}

	CodeNS result = ( CodeNS )make_code();
	result->Type  = ECode::Namespace;
	result->Name  = get_cached_string( name );

	result->Body  = body;

	Context.pop();
	return result;
}

CodeNS parse_namespace( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
		return CodeInvalid;

	Context.Tokens = toks;
	return parse_namespace();
}

internal CodeOperator parse_operator()
{
	using namespace Parser;
	push_scope();

	CodeAttributes attributes = { nullptr };
	CodeSpecifiers specifiers = { nullptr };
	ModuleFlag     mflags     = ModuleFlag::None;

	SpecifierT specs_found[ 16 ] { ESpecifier::NumSpecifiers };
	s32        NumSpecifiers = 0;

	if ( check( TokType::Module_Export ) )
	{
		mflags = ModuleFlag::Export;
		eat( TokType::Module_Export );
	}

	attributes = parse_attributes();

	while ( left && currtok.is_specifier() )
	{
		SpecifierT spec = ESpecifier::to_type( currtok );

		switch ( spec )
		{
			case ESpecifier::Const :
			case ESpecifier::Constexpr :
			case ESpecifier::ForceInline :
			case ESpecifier::Inline :
			case ESpecifier::NeverInline :
			case ESpecifier::Static :
				break;

			default :
				log_failure(
				"Invalid specifier "
				"%s"
				" for operator\n%s",
				ESpecifier::to_str( spec ),
				Context.to_string()
				);
				Context.pop();
				return CodeInvalid;
		}

		if ( spec == ESpecifier::Const )
			continue;

		specs_found[ NumSpecifiers ] = spec;
		NumSpecifiers++;
		eat( currtok.Type );
	}

	if ( NumSpecifiers )
	{
		specifiers = def_specifiers( NumSpecifiers, specs_found );
	}

	// Parse Return Type
	CodeType ret_type   = parse_type();

	CodeOperator result = parse_operator_after_ret_type( mflags, attributes, specifiers, ret_type );

	Context.pop();
	return result;
}

CodeOperator parse_operator( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
		return CodeInvalid;

	Context.Tokens = toks;
	return ( CodeOperator )parse_operator();
}

CodeOpCast parse_operator_cast( CodeSpecifiers specifiers )
{
	using namespace Parser;
	push_scope();

	// TODO : Specifiers attributed to the cast

	// Operator's namespace if not within same class.
	Token name = NullToken;
	if ( check( TokType::Identifier ) )
	{
		name = currtok;
		while ( left && currtok.Type == TokType::Identifier )
		{
			eat( TokType::Identifier );

			if ( currtok.Type == TokType::Access_StaticSymbol )
				eat( TokType::Access_StaticSymbol );
		}

		name.Length = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )name.Text;
	}

	eat( TokType::Decl_Operator );

	Code type           = parse_type();

	Context.Scope->Name = { type->Name.Data, type->Name.length() };

	eat( TokType::Capture_Start );
	eat( TokType::Capture_End );

	if ( check( TokType::Spec_Const ) )
	{
		if ( specifiers.ast == nullptr )
			specifiers = def_specifier( ESpecifier::Const );

		else
			specifiers.append( ESpecifier::Const );

		eat( TokType::Spec_Const );
	}

	Code        body       = NoCode;
	CodeComment inline_cmt = NoCode;

	if ( check( TokType::BraceCurly_Open ) )
	{
		eat( TokType::BraceCurly_Open );

		Token body_str = currtok;

		s32 level      = 0;
		while ( left && ( currtok.Type != TokType::BraceCurly_Close || level > 0 ) )
		{
			if ( currtok.Type == TokType::BraceCurly_Open )
				level++;

			else if ( currtok.Type == TokType::BraceCurly_Close )
				level--;

			eat( currtok.Type );
		}
		body_str.Length = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )body_str.Text;

		eat( TokType::BraceCurly_Close );

		body = untyped_str( body_str );
	}
	else
	{
		Token stmt_end = currtok;
		eat( TokType::Statement_End );

		if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
			inline_cmt = parse_comment();
	}

	CodeOpCast result = ( CodeOpCast )make_code();

	if ( name )
		result->Name = get_cached_string( name );

	if ( body )
	{
		result->Type = ECode::Operator_Cast;
		result->Body = body;
	}
	else
	{
		result->Type = ECode::Operator_Cast_Fwd;
	}

	if ( specifiers )
		result->Specs = specifiers;

	result->ValueType = type;

	Context.pop();
	return result;
}

CodeOpCast parse_operator_cast( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
		return CodeInvalid;

	Context.Tokens = toks;
	return parse_operator_cast();
}

internal inline CodeStruct parse_struct( bool inplace_def )
{
	using namespace Parser;
	push_scope();
	CodeStruct result = ( CodeStruct )parse_class_struct( TokType::Decl_Struct, inplace_def );
	Context.pop();
	return result;
}

CodeStruct parse_struct( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
		return CodeInvalid;

	Context.Tokens = toks;
	push_scope();
	CodeStruct result = ( CodeStruct )parse_class_struct( TokType::Decl_Struct );
	Context.pop();
	return result;
}

internal CodeTemplate parse_template()
{
#define UseTemplateCapture true

	using namespace Parser;
	push_scope();

	ModuleFlag mflags = ModuleFlag::None;

	if ( check( TokType::Module_Export ) )
	{
		mflags = ModuleFlag::Export;
		eat( TokType::Module_Export );
	}

	eat( TokType::Decl_Template );

	Code params = parse_params( UseTemplateCapture );
	if ( params == Code::Invalid )
	{
		Context.pop();
		return CodeInvalid;
	}

	Code definition = { nullptr };

	while ( left )
	{
		if ( check( TokType::Decl_Class ) )
		{
			definition = parse_class();
			break;
		}

		if ( check( TokType::Decl_Struct ) )
		{
			definition = parse_struct();
			break;
		}

		if ( check( TokType::Decl_Using ) )
		{
			definition = parse_using();
			break;
		}

		// Its either a function or a variable
		Token name                = { nullptr, 0, TokType::Invalid };

		CodeAttributes attributes = { nullptr };
		CodeSpecifiers specifiers = { nullptr };

		bool expects_function     = false;

		SpecifierT specs_found[ 16 ] { ESpecifier::NumSpecifiers };
		s32        NumSpecifiers = 0;

		attributes               = parse_attributes();

		while ( left && currtok.is_specifier() )
		{
			SpecifierT spec = ESpecifier::to_type( currtok );

			switch ( spec )
			{
				case ESpecifier::Const :
				case ESpecifier::Constexpr :
				case ESpecifier::Constinit :
				case ESpecifier::External_Linkage :
				case ESpecifier::Global :
				case ESpecifier::Inline :
				case ESpecifier::Local_Persist :
				case ESpecifier::Mutable :
				case ESpecifier::Static :
				case ESpecifier::Thread_Local :
				case ESpecifier::Volatile :
					break;

				case ESpecifier::Consteval :
					expects_function = true;
					break;

				default :
					log_failure( "Invalid specifier %s for variable or function\n%s", ESpecifier::to_str( spec ), Context.to_string() );
					Context.pop();
					return CodeInvalid;
			}

			// Ignore const it will be handled by the type
			if ( spec == ESpecifier::Const )
				continue;

			specs_found[ NumSpecifiers ] = spec;
			NumSpecifiers++;
			eat( currtok.Type );
		}

		if ( NumSpecifiers )
		{
			specifiers = def_specifiers( NumSpecifiers, specs_found );
		}

		definition = parse_operator_function_or_variable( expects_function, attributes, specifiers );
		break;
	}

	CodeTemplate result = ( CodeTemplate )make_code();
	result->Type        = ECode::Template;
	result->Params      = params;
	result->Declaration = definition;
	result->ModuleFlags = mflags;

	Context.pop();
	return result;
#undef UseTemplateCapture
}

CodeTemplate parse_template( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
		return CodeInvalid;

	Context.Tokens = toks;
	return parse_template();
}

/*
    This is a mess, but it works
    Parsing typename is arguably one of the worst aspects of C/C++.
    This is an effort to parse it without a full blown or half-blown compliant parser.

    Recursive function typenames are not supported, if they are used expect it to serailize just fine, but validation with AST::is_equal
    will not be possible if two ASTs share the same definiton but the formatting is slightly different:
    AST_1->Name: (* A    ( int   (*)    (short a,unsigned b,long c) ) )
    AST_2->Name: (* A       ( int(*)(short a, unsigned b, long c) ) )

    The excess whitespace cannot be stripped however, because there is no semantic awareness within the first capture group.
*/
internal CodeType parse_type( bool* typedef_is_function )
{
	using namespace Parser;
	push_scope();

	Token context_tok = prevtok;

	SpecifierT specs_found[ 16 ] { ESpecifier::NumSpecifiers };
	s32        NumSpecifiers = 0;

	Token name               = { nullptr, 0, TokType::Invalid };

	// Attributes are assumed to be before the type signature
	CodeAttributes attributes = parse_attributes();

	// Prefix specifiers
	while ( left && currtok.is_specifier() )
	{
		SpecifierT spec = ESpecifier::to_type( currtok );

		if ( spec != ESpecifier::Const )
		{
			log_failure( "Error, invalid specifier used in type definition: %s\n%s", currtok.Text, Context.to_string() );
			Context.pop();
			return CodeInvalid;
		}

		specs_found[ NumSpecifiers ] = spec;
		NumSpecifiers++;
		eat( currtok.Type );
	}

	if ( left == 0 )
	{
		log_failure( "Error, unexpected end of type definition\n%s", Context.to_string() );
		Context.pop();
		return CodeInvalid;
	}

	// All kinds of nonsense can makeup a type signature, first we check for a in-place definition of a class, enum, or struct
	if ( currtok.Type == TokType::Decl_Class || currtok.Type == TokType::Decl_Enum || currtok.Type == TokType::Decl_Struct || currtok.Type == TokType::Decl_Union )
	{
		name = currtok;
		eat( currtok.Type );

		name.Length = ( ( sptr )currtok.Text + currtok.Length ) - ( sptr )name.Text;
		eat( TokType::Identifier );
		Context.Scope->Name = name;
	}

#if 0
	else if ( currtok.Type == TokType::DeclType )
	{
		// Will have a capture and its own parsing rules, were going to just shove everything in a string (for now).
		name = currtok;
		eat( TokType::DeclType );

		eat( TokType::Capture_Start );
		while ( left && currtok.Type != TokType::Capture_End )
		{
			if ( currtok.Type == TokType::Capture_Start )
				level++;

			if ( currtok.Type == TokType::Capture_End )
				level--;

			eat( currtok.Type );
		}
		eat( TokType::Capture_End );

		name.Length = ( (sptr)currtok.Text + currtok.Length ) - (sptr)name.Text;
		Context.Scope->Name = name;
	}
#endif

	// Check if native type keywords are used, eat them for the signature.
	else if ( currtok.Type >= TokType::Type_Unsigned && currtok.Type <= TokType::Type_MS_W64 )
	{
		name = currtok;
		eat( currtok.Type );

		while ( currtok.Type >= TokType::Type_Unsigned && currtok.Type <= TokType::Type_MS_W64 )
		{
			eat( currtok.Type );
		}

		name.Length         = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )name.Text;
		Context.Scope->Name = name;
	}

	// The usual Identifier type signature that may have namespace qualifiers
	else
	{
		name                = parse_identifier();
		Context.Scope->Name = name;
		if ( ! name )
		{
			log_failure( "Error, failed to type signature\n%s", Context.to_string() );
			Context.pop();
			return CodeInvalid;
		}
	}

	// Suffix specifiers for typename.
	while ( left && currtok.is_specifier() )
	{
		SpecifierT spec = ESpecifier::to_type( currtok );

		if ( spec != ESpecifier::Const && spec != ESpecifier::Ptr && spec != ESpecifier::Ref && spec != ESpecifier::RValue )
		{
			log_failure( "Error, invalid specifier used in type definition: %s\n%s", currtok.Text, Context.to_string() );
			Context.pop();
			return CodeInvalid;
		}

		specs_found[ NumSpecifiers ] = spec;
		NumSpecifiers++;
		eat( currtok.Type );
	}

#ifdef GEN_USE_NEW_TYPENAME_PARSING
	if ( NumSpecifiers )
	{
		specifiers    = def_specifiers( NumSpecifiers, specs_found );
		NumSpecifiers = 0;
	}
#endif

	// For function type signatures
	CodeType  return_type = NoCode;
	CodeParam params      = NoCode;

#ifdef GEN_USE_NEW_TYPENAME_PARSING
	CodeParam params_nested = NoCode;
#endif

	bool   is_function_typename = false;
	Token* last_capture         = nullptr;
	{
		Token* scanner = Context.Tokens.Arr + Context.Tokens.Idx;

		// An identifier being within a typename's signature only occurs if were parsing a typename for a typedef.
		if ( typedef_is_function && scanner->Type == TokType::Identifier )
		{
			is_function_typename = true;
			++scanner;
		}
		is_function_typename = scanner->Type == TokType::Capture_Start;

		Token* first_capture = scanner;
		if ( is_function_typename )
		{
			// Go to the end of the signature
			while ( scanner->Type != TokType::Statement_End && scanner->Type != TokType::BraceCurly_Open )
				++scanner;

			// Go back to the first capture start found
			while ( scanner->Type != TokType::Capture_Start )
				--scanner;

			last_capture = scanner;
		}

		bool is_for_opcast = str_compare( Context.Scope->Prev->ProcName, "parse_operator_cast" ) == 0;
		if ( is_for_opcast && is_function_typename && last_capture )
		{
			// If we're parsing for an operator cast, having one capture start is not enough
			// we need to make sure that the capture is not for the cast definition.
			is_function_typename = false;

			if ( last_capture == first_capture )
			{
				// The capture start in question is the first capture start, this is not a function typename.
				is_function_typename = false;
			}
		}
	}

	if ( is_function_typename )
	{
		// We're dealing with a function typename.
		// By this point, decltype should have been taken care of for return type, along with any all its specifiers

		// The previous information with exception to attributes will be considered the return type.
		return_type       = ( CodeType )make_code();
		return_type->Type = ECode::Typename;

		// String
		// name_stripped = String::make( GlobalAllocator, name );
		// name_stripped.strip_space();
		return_type->Name = get_cached_string( name );

#ifdef GEN_USE_NEW_TYPENAME_PARSING
		if ( specifiers )
		{
			return_type->Specs = specifiers;
			specifiers         = nullptr;
		}

#else
		if ( NumSpecifiers )
			return_type->Specs = def_specifiers( NumSpecifiers, ( SpecifierT* )specs_found );

		// Reset specifiers, the function itself will have its own suffix specifiers possibly.
		NumSpecifiers = 0;
#endif

		name = { nullptr, 0, TokType::Invalid };

		// The next token can either be a capture for the identifier or it could be the identifier exposed.
		if ( ! check( TokType::Capture_Start ) )
		{
			// Started with an identifier immeidately, which means its of the format: <ReturnType> <identifier> <capture>;
			name = parse_identifier();
		}

		// If the next token is a capture start and is not the last capture, then we're dealing with function typename whoose identifier is within the capture.
		else if ( ( Context.Tokens.Arr + Context.Tokens.Idx ) != last_capture )
		{
			// WIP : Possible alternative without much pain...
			// If this were to be parsed properly...
			// Eat Capture Start
			// Deal with possible binding specifiers (*, &, &&) and modifiers on those bindings (const, volatile)
			// Parse specifiers for the typename with an optional identifier,
			// we can shove these specific specifiers into a specs, and then leave the suffix ones for a separate member of the AST.
			// Parse immeidate capture which would be with parse_params()
			// Eat Capture End
#ifdef GEN_USE_NEW_TYPENAME_PARSING
			eat( TokType::Capture_Start );

			// Binding specifiers
			while ( left && currtok.is_specifier() )
			{
				SpecifierT spec = ESpecifier::to_type( currtok );

				if ( spec != ESpecifier::Ptr && spec != ESpecifier::Ref && spec != ESpecifier::RValue )
				{
					log_failure( "Error, invalid specifier used in type definition: %s\n%s", currtok.Text, Context.to_string() );
					Context.pop();
					return CodeInvalid;
				}

				specs_found[ NumSpecifiers ] = spec;
				NumSpecifiers++;
				eat( currtok.Type );
			}

			if ( NumSpecifiers )
			{
				specifiers = def_specifiers( NumSpecifiers, specs_found );
			}
			NumSpecifiers = 0;

			if ( check( TokType::Identifier ) )
				name = parse_identifier();

			// Immeidate parameters

			if ( check( TokType::Capture_Start ) )
				params_nested = parse_params();

#else
			// Starting immediatley with a capture, most likely declaring a typename for a member function pointer.
			// Everything within this capture will just be shoved into the name field including the capture tokens themselves.
			name = currtok;

			eat( TokType::Capture_Start );
			s32 level = 0;
			while ( left && ( currtok.Type != TokType::Capture_End || level > 0 ) )
			{
				if ( currtok.Type == TokType::Capture_Start )
					level++;

				if ( currtok.Type == TokType::Capture_End )
					level--;

				eat( currtok.Type );
			}
			eat( TokType::Capture_End );

			name.Length = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )name.Text;
#endif
		}

		// Were now dealing with the parameters of the function
		params = parse_params();

		// Look for suffix specifiers for the function
		while ( left && currtok.is_specifier() )
		{
			SpecifierT spec = ESpecifier::to_type( currtok );

			if (   spec != ESpecifier::Const
				// TODO : Add support for NoExcept
				// && spec != ESpecifier::NoExcept
				&& spec != ESpecifier::RValue )
			{
				log_failure( "Error, invalid specifier used in type definition: %s\n%s", currtok.Text, Context.to_string() );
				Context.pop();
				return CodeInvalid;
			}

			specs_found[ NumSpecifiers ] = spec;
			NumSpecifiers++;
			eat( currtok.Type );
		}

#ifdef GEN_USE_NEW_TYPENAME_PARSING
		if ( NumSpecifiers )
		{
			func_suffix_specs = def_specifiers( NumSpecifiers, specs_found );
			NumSpecifiers     = 0;
		}
#endif
	}

	bool is_param_pack = false;
	if ( check( TokType::Varadic_Argument ) )
	{
		is_param_pack = true;
		eat( TokType::Varadic_Argument );
	}

	using namespace ECode;

	CodeType result = ( CodeType )make_code();
	result->Type    = Typename;
	// result->Token = Context.Scope->Start;

	// Need to wait until were using the new parsing method to do this.
	String name_stripped = strip_formatting( name, strip_formatting_dont_preserve_newlines );

	// name_stripped.strip_space();

#ifdef GEN_USE_NEW_TYPENAME_PARSING
	if ( params_nested )
	{
		name_stripped.append( params_nested->to_string() );
	}
#endif

	result->Name = get_cached_string( name_stripped );

	if ( attributes )
		result->Attributes = attributes;

#ifdef GEN_USE_NEW_TYPENAME_PARSING
	if ( specifiers )
	{
		result->Specs = specifiers;
	}

	if ( func_suffix_specs )
	{
		result->FuncSuffixSpecs = func_suffix_specs;
	}
#else
	if ( NumSpecifiers )
	{
		Code specifiers = def_specifiers( NumSpecifiers, ( SpecifierT* )specs_found );
		result->Specs   = specifiers;
	}
#endif

	if ( is_param_pack )
		result->IsParamPack = true;

	// These following are only populated if its a function typename
	if ( return_type )
	{
		result->ReturnType = return_type;

		if ( typedef_is_function )
			*typedef_is_function = true;
	}

	if ( params )
		result->Params = params;

	Context.pop();
	return result;
}

CodeType parse_type( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
		return CodeInvalid;

	Context.Tokens = toks;
	return parse_type();
}

internal CodeTypedef parse_typedef()
{
	using namespace Parser;
	push_scope();

	bool  is_function = false;
	Token name        = { nullptr, 0, TokType::Invalid };
	Code  array_expr  = { nullptr };
	Code  type        = { nullptr };

	ModuleFlag mflags = ModuleFlag::None;

	if ( check( TokType::Module_Export ) )
	{
		mflags = ModuleFlag::Export;
		eat( TokType::Module_Export );
	}

	eat( TokType::Decl_Typedef );

	constexpr bool from_typedef = true;

#if GEN_PARSER_DISABLE_MACRO_TYPEDEF
	if ( false )
#else
	if ( check( TokType::Preprocess_Macro ) )
#endif
	{
		type                = t_empty;
		name                = currtok;
		Context.Scope->Name = name;
		eat( TokType::Preprocess_Macro );
	}
	else
	{
		bool is_complicated = currtok.Type == TokType::Decl_Enum || currtok.Type == TokType::Decl_Class || currtok.Type == TokType::Decl_Struct
		|| currtok.Type == TokType::Decl_Union;

		if ( is_complicated )
		{
			TokArray tokens = Context.Tokens;

			s32 idx         = tokens.Idx;
			s32 level       = 0;
			for ( ; idx < tokens.Arr.num(); idx++ )
			{
				if ( tokens[ idx ].Type == TokType::BraceCurly_Open )
					level++;

				if ( tokens[ idx ].Type == TokType::BraceCurly_Close )
					level--;

				if ( level == 0 && tokens[ idx ].Type == TokType::Statement_End )
					break;
			}

			if ( ( idx - 2 ) == tokens.Idx )
			{
				// Its a forward declaration only
				type = parse_foward_or_definition( currtok.Type, from_typedef );
			}

			Token tok = tokens[ idx - 1 ];
			if ( tok.Type == TokType::Identifier )
			{
				tok                 = tokens[ idx - 2 ];

				bool is_indirection = tok.Type == TokType::Ampersand || tok.Type == TokType::Star;

				bool ok_to_parse    = false;

				if ( tok.Type == TokType::BraceCurly_Close )
				{
					// Its an inplace definition
					// typdef <which> <type_identifier> { ... } <identifier>;
					ok_to_parse = true;
				}
				else if ( tok.Type == TokType::Identifier && tokens[ idx - 3 ].Type == TokType::Decl_Struct )
				{
					// Its a variable with type ID using struct namespace.
					// <which> <type_identifier> <identifier>;
					ok_to_parse = true;
				}
				else if ( is_indirection )
				{
					// Its a indirection type with type ID using struct namespace.
					// <which> <type_identifier>* <identifier>;
					ok_to_parse = true;
				}

				if ( ! ok_to_parse )
				{
					log_failure( "Unsupported or bad member definition after struct declaration\n%s", Context.to_string() );
					Context.pop();
					return CodeInvalid;
				}

				type = parse_type();
			}
			else if ( tok.Type == TokType::BraceCurly_Close )
			{
				// Its a definition
				// <which> { ... };
				type = parse_foward_or_definition( currtok.Type, from_typedef );
			}
			else if ( tok.Type == TokType::BraceSquare_Close )
			{
				// Its an array definition
				// <which> <type_identifier> <identifier> [ ... ];
				type = parse_type();
			}
			else
			{
				log_failure( "Unsupported or bad member definition after struct declaration\n%s", Context.to_string() );
				Context.pop();
				return CodeInvalid;
			}
		}
		else
			type = parse_type( &is_function );

		if ( check( TokType::Identifier ) )
		{
			name = currtok;
			eat( TokType::Identifier );
		}
		else if ( ! is_function )
		{
			log_failure( "Error, expected identifier for typedef\n%s", Context.to_string() );
			Context.pop();
			return CodeInvalid;
		}
	}

	array_expr     = parse_array_decl();

	Token stmt_end = currtok;
	eat( TokType::Statement_End );

	CodeComment inline_cmt = NoCode;
	if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
		inline_cmt = parse_comment();

	using namespace ECode;

	CodeTypedef result  = ( CodeTypedef )make_code();
	result->Type        = Typedef;
	result->ModuleFlags = mflags;

	if ( is_function )
	{
		result->Name       = type->Name;
		result->IsFunction = true;
	}
	else
	{
		result->Name       = get_cached_string( name );
		result->IsFunction = false;
	}

	result->UnderlyingType = type;

	if ( type->Type == Typename && array_expr && array_expr->Type != Invalid )
		type.cast< CodeType >()->ArrExpr = array_expr;

	if ( inline_cmt )
		result->InlineCmt = inline_cmt;

	Context.pop();
	return result;
}

CodeTypedef parse_typedef( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
		return CodeInvalid;

	Context.Tokens = toks;
	return parse_typedef();
}

internal neverinline CodeUnion parse_union( bool inplace_def )
{
	using namespace Parser;
	push_scope();

	ModuleFlag mflags = ModuleFlag::None;

	if ( check( TokType::Module_Export ) )
	{
		mflags = ModuleFlag::Export;
		eat( TokType::Module_Export );
	}

	eat( TokType::Decl_Union );

	CodeAttributes attributes = parse_attributes();

	StrC name                 = { 0, nullptr };

	if ( check( TokType::Identifier ) )
	{
		name                = currtok;
		Context.Scope->Name = currtok;
		eat( TokType::Identifier );
	}

	CodeBody body = { nullptr };

	eat( TokType::BraceCurly_Open );

	body       = make_code();
	body->Type = ECode::Union_Body;

	while ( ! check_noskip( TokType::BraceCurly_Close ) )
	{
		if ( currtok_noskip.Type == TokType::Preprocess_Hash )
			eat( TokType::Preprocess_Hash );

		Code member = { nullptr };
		switch ( currtok_noskip.Type )
		{
			case TokType::NewLine :
				// Empty lines are auto skipped by Tokens.current()
				member = fmt_newline;
				eat( TokType::NewLine );
				break;

			case TokType::Comment :
				member = parse_comment();
				break;

			case TokType::Decl_Class :
				member = parse_complicated_definition( TokType::Decl_Class );
				break;

			case TokType::Decl_Enum :
				member = parse_complicated_definition( TokType::Decl_Enum );
				break;

			case TokType::Decl_Struct :
				member = parse_complicated_definition( TokType::Decl_Struct );
				break;

			case TokType::Decl_Union :
				member = parse_complicated_definition( TokType::Decl_Union );
				break;

			case TokType::Preprocess_Define :
				member = parse_define();
				break;

			case TokType::Preprocess_If :
			case TokType::Preprocess_IfDef :
			case TokType::Preprocess_IfNotDef :
			case TokType::Preprocess_ElIf :
				member = parse_preprocess_cond();
				break;

			case TokType::Preprocess_Else :
				member = preprocess_else;
				eat( TokType::Preprocess_Else );
				break;

			case TokType::Preprocess_EndIf :
				member = preprocess_endif;
				eat( TokType::Preprocess_EndIf );
				break;

			case TokType::Preprocess_Macro :
				member = parse_simple_preprocess( TokType::Preprocess_Macro );
				break;

			case TokType::Preprocess_Pragma :
				member = parse_pragma();
				break;

			case TokType::Preprocess_Unsupported :
				member = parse_simple_preprocess( TokType::Preprocess_Unsupported );
				break;

			default :
				member = parse_variable();
				break;
		}

		if ( member )
			body.append( member );
	}

	eat( TokType::BraceCurly_Close );

	if ( ! inplace_def )
		eat( TokType::Statement_End );

	CodeUnion result    = ( CodeUnion )make_code();
	result->Type        = ECode::Union;
	result->ModuleFlags = mflags;

	if ( name )
		result->Name = get_cached_string( name );

	if ( body )
		result->Body = body;

	if ( attributes )
		result->Attributes = attributes;

	Context.pop();
	return result;
}

CodeUnion parse_union( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
		return CodeInvalid;

	Context.Tokens = toks;
	return parse_union();
}

internal CodeUsing parse_using()
{
	using namespace Parser;
	push_scope();

	SpecifierT specs_found[ 16 ] { ESpecifier::Invalid };
	s32        NumSpecifiers  = 0;

	Token    name             = { nullptr, 0, TokType::Invalid };
	Code     array_expr       = { nullptr };
	CodeType type             = { nullptr };

	bool is_namespace         = false;

	ModuleFlag     mflags     = ModuleFlag::None;
	CodeAttributes attributes = { nullptr };

	if ( check( TokType::Module_Export ) )
	{
		mflags = ModuleFlag::Export;
		eat( TokType::Module_Export );
	}

	eat( TokType::Decl_Using );

	if ( currtok.Type == TokType::Decl_Namespace )
	{
		is_namespace = true;
		eat( TokType::Decl_Namespace );
	}

	name                = currtok;
	Context.Scope->Name = name;
	eat( TokType::Identifier );

	if ( currtok.IsAssign )
	{
		attributes = parse_attributes();

		eat( TokType::Operator );

		type = parse_type();
	}

	array_expr     = parse_array_decl();

	Token stmt_end = currtok;
	eat( TokType::Statement_End );

	CodeComment inline_cmt = NoCode;
	if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
	{
		inline_cmt = parse_comment();
	}

	using namespace ECode;

	CodeUsing result    = ( CodeUsing )make_code();
	result->Name        = get_cached_string( name );
	result->ModuleFlags = mflags;

	if ( is_namespace )
	{
		result->Type = Using_Namespace;
	}
	else
	{
		result->Type = Using;

		if ( type )
			result->UnderlyingType = type;

		if ( array_expr )
			type->ArrExpr = array_expr;

		if ( attributes )
			result->Attributes = attributes;

		if ( inline_cmt )
			result->InlineCmt = inline_cmt;
	}

	Context.pop();
	return result;
}

CodeUsing parse_using( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
		return CodeInvalid;

	Context.Tokens = toks;
	return parse_using();
}

internal CodeVar parse_variable()
{
	using namespace Parser;
	push_scope();

	SpecifierT specs_found[ 16 ] { ESpecifier::NumSpecifiers };
	s32        NumSpecifiers  = 0;

	ModuleFlag     mflags     = ModuleFlag::None;
	CodeAttributes attributes = { nullptr };
	CodeSpecifiers specifiers = { nullptr };

	if ( check( TokType::Module_Export ) )
	{
		mflags = ModuleFlag::Export;
		eat( TokType::Module_Export );
	}

	attributes = parse_attributes();

	while ( left && currtok.is_specifier() )
	{
		SpecifierT spec = ESpecifier::to_type( currtok );

		switch ( spec )
		{
			case ESpecifier::Const :
			case ESpecifier::Constexpr :
			case ESpecifier::Constinit :
			case ESpecifier::External_Linkage :
			case ESpecifier::Global :
			case ESpecifier::Inline :
			case ESpecifier::Local_Persist :
			case ESpecifier::Mutable :
			case ESpecifier::Static :
			case ESpecifier::Thread_Local :
			case ESpecifier::Volatile :
				break;

			default :
				log_failure( "Invalid specifier %s for variable\n%s", ESpecifier::to_str( spec ), Context.to_string() );
				Context.pop();
				return CodeInvalid;
		}

		// Ignore const specifiers, they're handled by the type
		if ( spec == ESpecifier::Const )
			break;

		specs_found[ NumSpecifiers ] = spec;
		NumSpecifiers++;
		eat( currtok.Type );
	}

	if ( NumSpecifiers )
	{
		specifiers = def_specifiers( NumSpecifiers, specs_found );
	}

	CodeType type = parse_type();

	if ( type == Code::Invalid )
		return CodeInvalid;

	Context.Scope->Name = parse_identifier();

	CodeVar result      = parse_variable_after_name( mflags, attributes, specifiers, type, Context.Scope->Name );

	Context.pop();
	return result;
}

CodeVar parse_variable( StrC def )
{
	check_parse_args( def );
	using namespace Parser;

	TokArray toks = lex( def );
	if ( toks.Arr == nullptr )
		return CodeInvalid;

	Context.Tokens = toks;
	return parse_variable();
}

// Undef helper macros
#undef check_parse_args
#undef currtok
#undef prevtok
#undef nexttok
#undef eat
#undef left
#undef check
#undef push_scope

#pragma endregion Parsing

sw token_fmt_va( char* buf, uw buf_size, s32 num_tokens, va_list va )
{
	char const* buf_begin = buf;
	sw          remaining = buf_size;

	local_persist Arena tok_map_arena;

	HashTable< StrC > tok_map;
	{
		local_persist char tok_map_mem[ TokenFmt_TokenMap_MemSize ];

		tok_map_arena = Arena::init_from_memory( tok_map_mem, sizeof( tok_map_mem ) );
		tok_map       = HashTable< StrC >::init( tok_map_arena );

		s32 left      = num_tokens - 1;

		while ( left-- )
		{
			char const* token = va_arg( va, char const* );
			StrC        value = va_arg( va, StrC );

			u32 key           = crc32( token, str_len( token ) );

			tok_map.set( key, value );
		}
	}

	char const* fmt     = va_arg( va, char const* );
	char        current = *fmt;

	while ( current )
	{
		sw len = 0;

		while ( current && current != '<' && remaining )
		{
			*buf = *fmt;
			buf++;
			fmt++;
			remaining--;

			current = *fmt;
		}

		if ( current == '<' )
		{
			char const* scanner = fmt + 1;

			s32 tok_len         = 0;

			while ( *scanner != '>' )
			{
				tok_len++;
				scanner++;
			}

			char const* token = fmt + 1;

			u32   key         = crc32( token, tok_len );
			StrC* value       = tok_map.get( key );

			if ( value )
			{
				sw          left = value->Len;
				char const* str  = value->Ptr;

				while ( left-- )
				{
					*buf = *str;
					buf++;
					str++;
					remaining--;
				}

				scanner++;
				fmt     = scanner;
				current = *fmt;
				continue;
			}

			*buf = *fmt;
			buf++;
			fmt++;
			remaining--;

			current = *fmt;
		}
	}

	tok_map.clear();
	tok_map_arena.free();

	sw result = buf_size - remaining;

	return result;
}

Code untyped_str( StrC content )
{
	if ( content.Len == 0 )
	{
		log_failure( "untyped_str: empty string" );
		return CodeInvalid;
	}

	Code result     = make_code();
	result->Name    = get_cached_string( content );
	result->Type    = ECode::Untyped;
	result->Content = result->Name;

	if ( result->Name == nullptr )
	{
		log_failure( "untyped_str: could not cache string" );
		return CodeInvalid;
	}

	return result;
}

Code untyped_fmt( char const* fmt, ... )
{
	if ( fmt == nullptr )
	{
		log_failure( "untyped_fmt: null format string" );
		return CodeInvalid;
	}

	local_persist thread_local char buf[ GEN_PRINTF_MAXLEN ] = { 0 };

	va_list va;
	va_start( va, fmt );
	sw length = str_fmt_va( buf, GEN_PRINTF_MAXLEN, fmt, va );
	va_end( va );

	Code result     = make_code();
	result->Name    = get_cached_string( { str_len( fmt, MaxNameLength ), fmt } );
	result->Type    = ECode::Untyped;
	result->Content = get_cached_string( { length, buf } );

	if ( result->Name == nullptr )
	{
		log_failure( "untyped_fmt: could not cache string" );
		return CodeInvalid;
	}

	return result;
}

Code untyped_token_fmt( s32 num_tokens, ... )
{
	if ( num_tokens == 0 )
	{
		log_failure( "untyped_token_fmt: zero tokens" );
		return CodeInvalid;
	}

	local_persist thread_local char buf[ GEN_PRINTF_MAXLEN ] = { 0 };

	va_list va;
	va_start( va, num_tokens );
	sw length = token_fmt_va( buf, GEN_PRINTF_MAXLEN, num_tokens, va );
	va_end( va );

	Code result     = make_code();
	result->Name    = get_cached_string( { length, buf } );
	result->Type    = ECode::Untyped;
	result->Content = result->Name;

	if ( result->Name == nullptr )
	{
		log_failure( "untyped_fmt: could not cache string" );
		return CodeInvalid;
	}

	return result;
}

#pragma endregion Interface

#pragma region Builder

Builder Builder::open( char const* path )
{
	Builder result;

	FileError error = file_open_mode( &result.File, EFileMode_WRITE, path );

	if ( error != EFileError_NONE )
	{
		log_failure( "gen::File::open - Could not open file: %s", path );
		return result;
	}

	result.Buffer = String::make_reserve( GlobalAllocator, Builder_StrBufferReserve );

	// log_fmt("$Builder - Opened file: %s\n", result.File.filename );
	return result;
}

void Builder::pad_lines( s32 num )
{
	Buffer.append( "\n" );
}

void Builder::print( Code code )
{
	String str = code->to_string();
	// const sw len = str.length();
	// log_fmt( "%s - print: %.*s\n", File.filename, len > 80 ? 80 : len, str.Data );
	Buffer.append( str );
}

void Builder::print_fmt( char const* fmt, ... )
{
	sw   res;
	char buf[ GEN_PRINTF_MAXLEN ] = { 0 };

	va_list va;
	va_start( va, fmt );
	res = str_fmt_va( buf, count_of( buf ) - 1, fmt, va ) - 1;
	va_end( va );

	// log_fmt( "$%s - print_fmt: %.*s\n", File.filename, res > 80 ? 80 : res, buf );
	Buffer.append( buf, res );
}

void Builder::write()
{
	bool result = file_write( &File, Buffer, Buffer.length() );

	if ( result == false )
		log_failure( "gen::File::write - Failed to write to file: %s\n", file_name( &File ) );

	log_fmt( "Generated: %s\n", File.filename );
	file_close( &File );
	Buffer.free();
}

#pragma endregion Builder


#pragma region Scanner

// This is a simple file reader that reads the entire file into memory.
// It has an extra option to skip the first few lines for undesired includes.
// This is done so that includes can be kept in dependency and component files so that intellisense works.
Code scan_file( char const* path )
{
	FileInfo file;

	FileError error = file_open_mode( &file, EFileMode_READ, path );
	if ( error != EFileError_NONE )
	{
		GEN_FATAL( "scan_file: Could not open: %s", path );
	}

	sw fsize = file_size( &file );
	if ( fsize <= 0 )
	{
		GEN_FATAL( "scan_file: %s is empty", path );
	}

	String str = String::make_reserve( GlobalAllocator, fsize );
	file_read( &file, str, fsize );
	str.get_header().Length = fsize;

	// Skip GEN_INTELLISENSE_DIRECTIVES preprocessor blocks
	// Its designed so that the directive should be the first thing in the file.
	// Anything that comes before it will also be omitted.
	{
#define current ( *scanner )
#define matched 0
#define move_fwd() \
	do             \
	{              \
		++scanner; \
		--left;    \
	} while ( 0 )
		const StrC directive_start  = txt( "ifdef" );
		const StrC directive_end    = txt( "endif" );
		const StrC def_intellisense = txt( "GEN_INTELLISENSE_DIRECTIVES" );

		bool        found_directive = false;
		char const* scanner         = str.Data;
		s32         left            = fsize;
		while ( left )
		{
			// Processing directive.
			if ( current == '#' )
			{
				move_fwd();
				while ( left && char_is_space( current ) )
					move_fwd();

				if ( ! found_directive )
				{
					if ( left && str_compare( scanner, directive_start.Ptr, directive_start.Len ) == matched )
					{
						scanner += directive_start.Len;
						left    -= directive_start.Len;

						while ( left && char_is_space( current ) )
							move_fwd();

						if ( left && str_compare( scanner, def_intellisense.Ptr, def_intellisense.Len ) == matched )
						{
							scanner         += def_intellisense.Len;
							left            -= def_intellisense.Len;

							found_directive  = true;
						}
					}

					// Skip to end of line
					while ( left && current != '\r' && current != '\n' )
						move_fwd();
					move_fwd();

					if ( left && current == '\n' )
						move_fwd();

					continue;
				}

				if ( left && str_compare( scanner, directive_end.Ptr, directive_end.Len ) == matched )
				{
					scanner += directive_end.Len;
					left    -= directive_end.Len;

					// Skip to end of line
					while ( left && current != '\r' && current != '\n' )
						move_fwd();
					move_fwd();

					if ( left && current == '\n' )
						move_fwd();

					// sptr skip_size = fsize - left;
					if ( ( scanner + 2 ) >= ( str.Data + fsize ) )
					{
						mem_move( str, scanner, left );
						str.get_header().Length = left;
						break;
					}

					mem_move( str, scanner, left );
					str.get_header().Length = left;

					break;
				}
			}

			move_fwd();
		}
#undef move_fwd
#undef matched
#undef current
	}

	file_close( &file );
	return untyped_str( str );
}

#if 0
struct CodeFile
{
	using namespace Parser;

	String              FilePath;
	TokArray            Tokens;
	Array<ParseFailure> ParseFailures;
	Code                CodeRoot;
};

namespace Parser
{
	struct ParseFailure
	{
		String Reason;
		Code   Node;
	};
}

CodeFile scan_file( char const* path )
{
	using namespace Parser;

	CodeFile
	result = {};
	result.FilePath = String::make( GlobalAllocator, path );

	Code code = scan_file( path );
	result.CodeRoot = code;

	ParseContext context = parser_get_last_context();
	result.Tokens        = context.Tokens;
	result.ParseFailures = context.Failures;

	return result;
}
#endif
#pragma endregion Scanner

GEN_NS_END

#endif
#pragma endregion GENCPP IMPLEMENTATION GUARD

#if __clang__
#pragma clang diagnostic pop
#endif

#if __GNUC__
#pragma GCC diagnostic pop
#endif
