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gencpp/project/components/parser.cpp

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#ifdef GEN_INTELLISENSE_DIRECTIVES
#pragma once
#include "gen/etoktype.cpp"
#include "interface.upfront.cpp"
#include "lexer.cpp"
#endif
namespace parser {
// TODO(Ed) : Rename ETokType::Capture_Start, ETokType::Capture_End to Open_Parenthesis adn Close_Parenthesis
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 >= num(Tokens.Arr) ? Tokens.Arr[num(Tokens.Arr) -1] : Tokens.current();
sptr length = scope_start.Length;
char const* current = scope_start.Text + length;
while ( current <= back(Tokens.Arr).Text && *current != '\n' && length < 74 )
{
current++;
length++;
}
String line = string_make( GlobalAllocator, { length, scope_start.Text } );
append_fmt( result, "\tScope : %s\n", line );
free(line);
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 )
append_fmt(result, "\t(%d, %d):%*c\n", last_valid.Line, last_valid.Column, length_from_err, '^' );
else
append_fmt(result, "\t(%d, %d)\n", last_valid.Line, last_valid.Column );
StackNode* curr_scope = Scope;
s32 level = 0;
do
{
if ( curr_scope->Name )
{
append_fmt(result, "\t%d: %s, AST Name: %.*s\n", level, curr_scope->ProcName.Ptr, curr_scope->Name.Length, curr_scope->Name.Text );
}
else
{
append_fmt(result, "\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 ( num(Arr) - 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;
}
internal
void init()
{
Tokens = array_init_reserve<Token>( allocator_info(LexArena)
, ( LexAllocator_Size - sizeof( ArrayHeader ) ) / sizeof(Token)
);
fixed_arena_init(defines_map_arena);
defines = hashtable_init_reserve<StrC>( allocator_info(defines_map_arena), 256 );
}
internal
void deinit()
{
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 ( num(Context.Tokens.Arr) - Context.Tokens.Idx )
#ifdef check
#define CHECK_WAS_DEFINED
#pragma push_macro("check")
#undef check
#endif
# 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_complicated_definition ( TokType which );
internal CodeBody parse_class_struct_body ( TokType which, Token name = NullToken );
internal Code parse_class_struct ( TokType which, bool inplace_def );
internal CodeDefine parse_define ();
internal Code parse_expression ();
internal Code parse_forward_or_definition ( TokType which, bool is_inplace );
internal CodeFn parse_function_after_name ( ModuleFlag mflags, CodeAttributes attributes, CodeSpecifiers specifiers, CodeType ret_type, Token name );
internal Code parse_function_body ();
internal Code parse_global_nspace ();
internal Code parse_global_nspace_constructor_destructor( CodeSpecifiers specifiers );
internal 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 ( TokType which );
internal Code parse_static_assert ();
internal void parse_template_args ( Token& token );
internal CodeVar parse_variable_after_name ( ModuleFlag mflags, CodeAttributes attributes, CodeSpecifiers specifiers, CodeType type, StrC name );
internal CodeVar parse_variable_declaration_list ();
internal CodeClass parse_class ( bool inplace_def = false );
internal CodeConstructor parse_constructor ( CodeSpecifiers specifiers );
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_extern_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 from_template = false, 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.
*/
internal
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();
append( content, 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();
append( content, 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;
append( content, 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();
append( content, cut_ptr, cut_length );
last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
continue;
}
// Tabs
if (scanner[0] == '\t')
{
if (pos > last_cut)
append( content, cut_ptr, cut_length);
if ( back( content ) != ' ' )
append( content, ' ');
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;
append( content, cut_ptr, cut_length );
last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
continue;
}
if ( pos > last_cut )
append( content, cut_ptr, cut_length );
// Replace with a space
if ( back( content ) != ' ' )
append( content, ' ' );
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();
append( content, cut_ptr, cut_length );
last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
continue;
}
if ( pos > last_cut )
append( content, cut_ptr, cut_length );
// Replace with a space
if ( back( content ) != ' ' )
append( content, ' ' );
move_fwd();
last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
continue;
}
// Escaped newlines
if ( scanner[0] == '\\' )
{
append( content, 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 ] ) )
{
append( content, 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 ( back( content ) != ' ' )
append( content, ' ' );
continue;
}
move_fwd();
}
if ( last_cut < raw_text.Len )
{
append( content, 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()
{
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 );
// [ <Content>
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 );
// [ <Content> ]
// Its a multi-dimensional array
if ( check( TokType::BraceSquare_Open ))
{
Code adjacent_arr_expr = parse_array_decl();
// [ <Content> ][ <Content> ]...
array_expr->Next = adjacent_arr_expr.ast;
}
Context.pop();
return array_expr;
}
Context.pop();
return { nullptr };
}
internal inline
CodeAttributes parse_attributes()
{
push_scope();
Token start = currtok;
s32 len = 0;
// There can be more than one attribute. If there is flatten them to a single string.
// TODO(Ed): Support keeping an linked list of attributes similar to parameters
while ( left && currtok.is_attribute() )
{
if ( check( TokType::Attribute_Open ) )
{
eat( TokType::Attribute_Open );
// [[
while ( left && currtok.Type != TokType::Attribute_Close )
{
eat( currtok.Type );
}
// [[ <Content>
eat( TokType::Attribute_Close );
// [[ <Content> ]]
len = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )start.Text;
}
else if ( check( TokType::Decl_GNU_Attribute ) )
{
eat( TokType::Decl_GNU_Attribute );
eat( TokType::Capture_Start );
eat( TokType::Capture_Start );
// __attribute__((
while ( left && currtok.Type != TokType::Capture_End )
{
eat( currtok.Type );
}
// __attribute__(( <Content>
eat( TokType::Capture_End );
eat( TokType::Capture_End );
// __attribute__(( <Content> ))
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 );
// __declspec(
while ( left && currtok.Type != TokType::Capture_End )
{
eat( currtok.Type );
}
// __declspec( <Content>
eat( TokType::Capture_End );
// __declspec( <Content> )
len = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )start.Text;
}
else if ( currtok.is_attribute() )
{
eat( currtok.Type );
// <Attribute>
// If its a macro based attribute, this could be a functional macro such as Unreal's UE_DEPRECATED(...)
if ( check( TokType::Capture_Start))
{
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);
}
len = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )start.Text;
// <Attribute> ( ... )
}
}
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
Code parse_class_struct( TokType which, bool inplace_def = false )
{
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 );
}
// <ModuleFlags>
eat( which );
// <ModuleFlags> <class/struct>
attributes = parse_attributes();
// <ModuleFlags> <class/struct> <Attributes>
if ( check( TokType::Identifier ) )
{
name = parse_identifier();
Context.Scope->Name = name;
}
// <ModuleFlags> <class/struct> <Attributes> <Name>
local_persist
char interface_arr_mem[ kilobytes(4) ] {0};
Array<CodeType> interfaces; {
Arena arena = arena_init_from_memory( interface_arr_mem, kilobytes(4) );
interfaces = array_init_reserve<CodeType>( allocator_info(arena), 4 );
}
// TODO(Ed) : Make an AST_DerivedType, we'll store any arbitary derived type into there as a linear linked list of them.
if ( check( TokType::Assign_Classifer ) )
{
eat( TokType::Assign_Classifer );
// <ModuleFlags> <class/struct> <Attributes> <Name> :
if ( currtok.is_access_specifier() )
{
access = currtok.to_access_specifier();
// <ModuleFlags> <class/struct> <Attributes> <Name> : <Access Specifier>
eat( currtok.Type );
}
Token parent_tok = parse_identifier();
parent = def_type( parent_tok );
// <ModuleFlags> <class/struct> <Attributes> <Name> : <Access Specifier> <Parent/Interface Name>
while ( check(TokType::Comma) )
{
eat( TokType::Comma );
// <ModuleFlags> <class/struct> <Attributes> <Name> : <Access Specifier> <Name>,
if ( currtok.is_access_specifier() )
{
eat(currtok.Type);
}
Token interface_tok = parse_identifier();
append(interfaces, def_type( interface_tok ) );
// <ModuleFlags> <class/struct> <Attributes> <Name> : <Access Specifier> <Name>, ...
}
}
if ( check( TokType::BraceCurly_Open ) )
{
body = parse_class_struct_body( which, name );
}
// <ModuleFlags> <class/struct> <Attributes> <Name> : <Access Specifier> <Name>, ... { <Body> }
CodeComment inline_cmt = NoCode;
if ( ! inplace_def )
{
Token stmt_end = currtok;
eat( TokType::Statement_End );
// <ModuleFlags> <class/struct> <Attributes> <Name> : <Access Specifier> <Name>, ... { <Body> };
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
inline_cmt = parse_comment();
// <ModuleFlags> <class/struct> <Attributes> <Name> : <Access Specifier> <Name>, ... { <Body> }; <InlineCmt>
}
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;
free(interfaces);
return result;
}
internal neverinline
CodeBody parse_class_struct_body( TokType which, Token name )
{
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::Statement_End:
{
// TODO(Ed): Convert this to a general warning procedure
log_fmt("Dangling end statement found %S\n", currtok_noskip.to_string());
eat( TokType::Statement_End );
continue;
}
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 );
// public:
break;
case TokType::Access_Protected:
member = access_protected;
eat( TokType::Access_Protected );
eat( TokType::Assign_Classifer );
// protected:
break;
case TokType::Access_Private:
member = access_private;
eat( TokType::Access_Private );
eat( TokType::Assign_Classifer );
// private:
break;
case TokType::Decl_Class:
member = parse_complicated_definition( TokType::Decl_Class );
// class
break;
case TokType::Decl_Enum:
member = parse_complicated_definition( TokType::Decl_Enum );
// enum
break;
case TokType::Decl_Friend:
member = parse_friend();
// friend
break;
case TokType::Decl_Operator:
member = parse_operator_cast();
// operator <Type>()
break;
case TokType::Decl_Struct:
member = parse_complicated_definition( TokType::Decl_Struct );
// struct
break;
case TokType::Decl_Template:
member = parse_template();
// template< ... >
break;
case TokType::Decl_Typedef:
member = parse_typedef();
// typedef
break;
case TokType::Decl_Union:
member = parse_complicated_definition( TokType::Decl_Union );
// union
break;
case TokType::Decl_Using:
member = parse_using();
// 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();
// ~<Name>()
break;
case TokType::Preprocess_Define:
member = parse_define();
// #define
break;
case TokType::Preprocess_Include:
member = parse_include();
// #include
break;
case TokType::Preprocess_If:
case TokType::Preprocess_IfDef:
case TokType::Preprocess_IfNotDef:
case TokType::Preprocess_ElIf:
member = parse_preprocess_cond();
// #<Condition>
break;
case TokType::Preprocess_Else:
member = preprocess_else;
eat( TokType::Preprocess_Else );
// #else
break;
case TokType::Preprocess_EndIf:
member = preprocess_endif;
eat( TokType::Preprocess_EndIf );
// #endif
break;
case TokType::Preprocess_Macro:
member = parse_simple_preprocess( TokType::Preprocess_Macro );
// <Macro>
break;
case TokType::Preprocess_Pragma:
member = parse_pragma();
// #pragma
break;
case TokType::Preprocess_Unsupported:
member = parse_simple_preprocess( TokType::Preprocess_Unsupported );
// #<UNKNOWN>
break;
case TokType::StaticAssert:
member = parse_static_assert();
// 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();
// <Attributes>
}
//! Fallthrough intended
case TokType::Spec_Consteval:
case TokType::Spec_Constexpr:
case TokType::Spec_Constinit:
case TokType::Spec_Explicit:
case TokType::Spec_ForceInline:
case TokType::Spec_Inline:
case TokType::Spec_Mutable:
case TokType::Spec_NeverInline:
case TokType::Spec_Static:
case TokType::Spec_Volatile:
case TokType::Spec_Virtual:
{
SpecifierT specs_found[16] { ESpecifier::NumSpecifiers };
s32 NumSpecifiers = 0;
while ( left && currtok.is_specifier() )
{
SpecifierT spec = ESpecifier::to_type( currtok );
b32 ignore_spec = false;
switch ( spec )
{
case ESpecifier::Constexpr:
case ESpecifier::Constinit:
case ESpecifier::Explicit:
case ESpecifier::Inline:
case ESpecifier::ForceInline:
case ESpecifier::Mutable:
case ESpecifier::NeverInline:
case ESpecifier::Static:
case ESpecifier::Volatile:
case ESpecifier::Virtual:
break;
case ESpecifier::Consteval:
expects_function = true;
break;
case ESpecifier::Const :
ignore_spec = true;
break;
default:
log_failure( "Invalid specifier %s for variable\n%s", ESpecifier::to_str(spec), Context.to_string() );
Context.pop();
return CodeInvalid;
}
// Every specifier after would be considered part of the type type signature
if (ignore_spec)
break;
specs_found[NumSpecifiers] = spec;
NumSpecifiers++;
eat( currtok.Type );
}
if ( NumSpecifiers )
{
specifiers = def_specifiers( NumSpecifiers, specs_found );
}
// <Attributes> <Specifiers>
if ( currtok.is_attribute() )
{
// Unfortuantely Unreal has code where there is attirbutes before specifiers
CodeAttributes more_attributes = parse_attributes();
if ( attributes )
{
String fused = string_make_reserve( GlobalAllocator, length(attributes->Content) + length(more_attributes->Content) );
append_fmt( fused, "%S %S", attributes->Content, more_attributes->Content );
attributes->Name = get_cached_string(fused);
attributes->Content = attributes->Name;
// <Attributes> <Specifiers> <Attributes>
}
attributes = more_attributes;
}
if ( currtok.Type == TokType::Operator && currtok.Text[0] == '~' )
{
member = parse_destructor( specifiers );
// <Attribute> <Specifiers> ~<Name>()
break;
}
if ( currtok.Type == TokType::Decl_Operator )
{
member = parse_operator_cast( specifiers );
// <Attributes> <Specifiers> operator <Type>()
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_bool:
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( specifiers );
// <Attributes> <Specifiers> <Name>()
break;
}
}
member = parse_operator_function_or_variable( expects_function, attributes, specifiers );
// <Attributes> <Specifiers> operator <Op> ...
// or
// <Attributes> <Specifiers> <Name> ...
}
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 );
// Something unknown
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 );
// { <Members> }
Context.pop();
return result;
}
internal
CodeComment parse_comment()
{
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( TokType which )
{
push_scope();
bool is_inplace = false;
TokArray tokens = Context.Tokens;
s32 idx = tokens.Idx;
s32 level = 0;
for ( ; idx < num(tokens.Arr); 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
Code result = parse_forward_or_definition( which, is_inplace );
// <class, enum, struct, or union> <Name>;
Context.pop();
return result;
}
Token tok = tokens[ idx - 1 ];
if ( tok.is_specifier() && is_trailing( ESpecifier::to_type(tok)) )
{
// <which> <type_identifier>(...) <specifier> ...;
s32 spec_idx = idx - 1;
Token spec = tokens[spec_idx];
while ( spec.is_specifier() && is_trailing( ESpecifier::to_type(spec)) )
{
-- spec_idx;
spec = tokens[spec_idx];
}
if ( tokens[spec_idx].Type == TokType::Capture_End )
{
// Forward declaration with trailing specifiers for a procedure
tok = tokens[spec_idx];
Code result = parse_operator_function_or_variable( false, { nullptr }, { nullptr } );
// <Attributes> <Specifiers> <ReturnType/ValueType> <operator <Op>, or Name> ...
Context.pop();
return result;
}
log_failure( "Unsupported or bad member definition after %s declaration\n%s", to_str(which), Context.to_string() );
Context.pop();
return CodeInvalid;
}
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 == which )
{
// Its a variable with type ID using <which> namespace.
// <which> <type_identifier> <identifier>;
ok_to_parse = true;
}
else if ( tok.Type == TokType::Assign_Classifer
&& ( ( tokens[idx - 5].Type == which && tokens[idx - 4].Type == TokType::Decl_Class )
|| ( tokens[idx - 4].Type == which))
)
{
// Its a forward declaration of an enum
// <enum> <type_identifier> : <identifier>;
// <enum> <class> <type_identifier> : <identifier>;
ok_to_parse = true;
Code result = parse_enum();
Context.pop();
return result;
}
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 %s declaration\n%s", to_str(which), Context.to_string() );
Context.pop();
return CodeInvalid;
}
Code result = parse_operator_function_or_variable( false, { nullptr }, { nullptr } );
// <Attributes> <Specifiers> <ReturnType/ValueType> <operator <Op>, or Name> ...
Context.pop();
return result;
}
else if ( tok.Type >= TokType::Type_Unsigned && tok.Type <= TokType::Type_MS_W64 )
{
tok = tokens[ idx - 2 ];
if ( tok.Type != TokType::Assign_Classifer
|| ( ( tokens[idx - 5].Type != which && tokens[idx - 4].Type != TokType::Decl_Class )
&& ( tokens[idx - 4].Type != which))
)
{
log_failure( "Unsupported or bad member definition after %s declaration\n%s", to_str(which), Context.to_string() );
Context.pop();
return CodeInvalid;
}
// Its a forward declaration of an enum class
// <enum> <type_identifier> : <identifier>;
// <enum> <class> <type_identifier> : <identifier>;
Code result = parse_enum();
Context.pop();
return result;
}
else if ( tok.Type == TokType::BraceCurly_Close )
{
// Its a definition
Code result = parse_forward_or_definition( which, is_inplace );
// <which> { ... };
Context.pop();
return result;
}
else if ( tok.Type == TokType::BraceSquare_Close )
{
// Its an array definition
Code result = parse_operator_function_or_variable( false, { nullptr }, { nullptr } );
// <which> <type_identifier> <identifier> [ ... ];
Context.pop();
return result;
}
else
{
log_failure( "Unsupported or bad member definition after %s declaration\n%S", to_str(which).Ptr, Context.to_string() );
Context.pop();
return CodeInvalid;
}
}
internal inline
CodeDefine parse_define()
{
push_scope();
eat( TokType::Preprocess_Define );
// #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 );
// #define <Name>
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 );
// #define <Name> <Content>
Context.pop();
return define;
}
define->Content = get_cached_string( strip_formatting( currtok, strip_formatting_dont_preserve_newlines ) );
eat( TokType::Preprocess_Content );
// #define <Name> <Content>
Context.pop();
return define;
}
internal inline
Code parse_assignment_expression()
{
Code expr = { nullptr };
eat( TokType::Operator );
// <Attributes> <Specifiers> <ValueType> <Name> =
Token expr_tok = currtok;
if ( currtok.Type == TokType::Statement_End && currtok.Type != TokType::Comma )
{
log_failure( "Expected expression after assignment operator\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
s32 level = 0;
while ( left && currtok.Type != TokType::Statement_End && (currtok.Type != TokType::Comma || level > 0) )
{
if (currtok.Type == TokType::BraceCurly_Open )
level++;
if (currtok.Type == TokType::BraceCurly_Close )
level--;
if (currtok.Type == TokType::Capture_Start)
level++;
else if (currtok.Type == TokType::Capture_End)
level--;
eat( currtok.Type );
}
expr_tok.Length = ( ( sptr )currtok.Text + currtok.Length ) - ( sptr )expr_tok.Text - 1;
expr = untyped_str( expr_tok );
// = <Expression>
return expr;
}
internal inline
Code parse_forward_or_definition( TokType which, bool is_inplace )
{
Code result = CodeInvalid;
switch ( which )
{
case TokType::Decl_Class:
result = parse_class( is_inplace );
return result;
case TokType::Decl_Enum:
result = parse_enum( is_inplace );
return result;
case TokType::Decl_Struct:
result = parse_struct( is_inplace );
return result;
case TokType::Decl_Union:
result = parse_union( is_inplace );
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() );
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
, Token name
)
{
push_scope();
CodeParam params = parse_params();
// <Attributes> <Specifiers> <ReturnType> <Name> ( <Parameters> )
// TODO(Ed), Review old comment : 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 );
}
// <Attributes> <Specifiers> <ReturnType> <Name> ( <Paraemters> ) <Specifiers>
CodeBody body = NoCode;
CodeComment inline_cmt = NoCode;
if ( check( TokType::BraceCurly_Open ) )
{
body = parse_function_body();
if ( body == Code::Invalid )
{
Context.pop();
return CodeInvalid;
}
// <Attributes> <Specifiers> <ReturnType> <Name> ( <Paraemters> ) <Specifiers> { <Body> }
}
else if ( check(TokType::Operator) && currtok.Text[0] == '=' )
{
eat(TokType::Operator);
specifiers.append( ESpecifier::Pure );
eat( TokType::Number);
Token stmt_end = currtok;
eat( TokType::Statement_End );
// <Attributes> <Specifiers> <ReturnType> <Name> ( <Paraemters> ) <Specifiers> = 0;
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
inline_cmt = parse_comment();
// <Attributes> <Specifiers> <ReturnType> <Name> ( <Paraemters> ) <Specifiers>; <InlineCmt>
}
else
{
Token stmt_end = currtok;
eat( TokType::Statement_End );
// <Attributes> <Specifiers> <ReturnType> <Name> ( <Paraemters> ) <Specifiers>;
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
inline_cmt = parse_comment();
// <Attributes> <Specifiers> <ReturnType> <Name> ( <Paraemters> ) <Specifiers>; <InlineCmt>
}
using namespace ECode;
String
name_stripped = string_make( GlobalAllocator, name );
strip_space(name_stripped);
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 ( attributes )
result->Attributes = attributes;
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 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_noskip;
s32 level = 0;
while ( left && ( currtok_noskip.Type != TokType::BraceCurly_Close || level > 0 ) )
{
if ( currtok_noskip.Type == TokType::BraceCurly_Open )
level++;
else if ( currtok_noskip.Type == TokType::BraceCurly_Close && level > 0 )
level--;
eat( currtok_noskip.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 ECode;
push_scope();
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::Statement_End:
{
// TODO(Ed): Convert this to a general warning procedure
log_fmt("Dangling end statement found %S\n", currtok_noskip.to_string());
eat( TokType::Statement_End );
continue;
}
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 );
// class
break;
case TokType::Decl_Enum:
member = parse_complicated_definition( TokType::Decl_Enum );
// 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();
// extern "..." { ... }
break;
case TokType::Decl_Namespace:
member = parse_namespace();
// namespace <Name> { ... }
break;
case TokType::Decl_Struct:
member = parse_complicated_definition( TokType::Decl_Struct );
// struct ...
break;
case TokType::Decl_Template:
member = parse_template();
// template<...> ...
break;
case TokType::Decl_Typedef:
member = parse_typedef();
// typedef ...
break;
case TokType::Decl_Union:
member = parse_complicated_definition( TokType::Decl_Union );
// union ...
break;
case TokType::Decl_Using:
member = parse_using();
// using ...
break;
case TokType::Preprocess_Define:
member = parse_define();
// #define ...
break;
case TokType::Preprocess_Include:
member = parse_include();
// #include ...
break;
case TokType::Preprocess_If:
case TokType::Preprocess_IfDef:
case TokType::Preprocess_IfNotDef:
case TokType::Preprocess_ElIf:
member = parse_preprocess_cond();
// #<Conditional> ...
break;
case TokType::Preprocess_Else:
member = preprocess_else;
eat( TokType::Preprocess_Else );
// #else
break;
case TokType::Preprocess_EndIf:
member = preprocess_endif;
eat( TokType::Preprocess_EndIf );
// #endif
break;
case TokType::Preprocess_Macro:
member = parse_simple_preprocess( TokType::Preprocess_Macro );
// <Macro>
break;
case TokType::Preprocess_Pragma:
member = parse_pragma();
// #pragma ...
break;
case TokType::Preprocess_Unsupported:
member = parse_simple_preprocess( TokType::Preprocess_Unsupported );
// #<UNSUPPORTED> ...
break;
case TokType::StaticAssert:
member = parse_static_assert();
// static_assert( <Conditional Expression>, ... );
break;
case TokType::Module_Export:
if ( which == Export_Body )
log_failure( "Nested export declaration\n%s", Context.to_string() );
member = parse_export_body();
// export { ... }
break;
case TokType::Module_Import:
{
not_implemented( context );
// import ...
}
//! Fallthrough intentional
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();
// <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() );
Context.pop();
return CodeInvalid;
}
if (ignore_spec)
break;
specs_found[NumSpecifiers] = spec;
NumSpecifiers++;
eat( currtok.Type );
}
if ( NumSpecifiers )
{
specifiers = def_specifiers( NumSpecifiers, specs_found );
}
// <Attributes> <Specifiers>
}
//! 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_bool:
case TokType::Type_char:
case TokType::Type_double:
case TokType::Type_int:
{
Code constructor_destructor = parse_global_nspace_constructor_destructor( specifiers );
// Possible constructor implemented at global file scope.
if ( constructor_destructor )
{
member = constructor_destructor;
break;
}
bool found_operator_cast_outside_class_implmentation = false;
s32 idx = Context.Tokens.Idx;
for ( ; idx < num(Context.Tokens.Arr); 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_outside_class_implmentation = true;
break;
}
if ( found_operator_cast_outside_class_implmentation )
{
member = parse_operator_cast( specifiers );
// <Attributes> <Specifiers> <Name>::operator <Type>() { ... }
break;
}
member = parse_operator_function_or_variable( expects_function, attributes, specifiers );
// <Attributes> <Specifiers> ...
}
}
if ( member == Code::Invalid )
{
log_failure( "Failed to parse member\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
// log_fmt("Global Body Member: %s", member->debug_str());
result.append( member );
}
if ( which != Global_Body )
eat( TokType::BraceCurly_Close );
// { <Body> }
Context.pop();
return result;
}
internal inline
Code parse_global_nspace_constructor_destructor( CodeSpecifiers specifiers )
{
Code result = { nullptr };
/*
To check if a definition is for a constructor we can go straight to the opening parenthesis for its parameters
From There we work backwards to see if we come across two identifiers with the same name between an member access
:: operator, there can be template parameters on the left of the :: so we ignore those.
Whats important is that its back to back.
This has multiple possible faults. What we parse using this method may not filter out if something has a "return type"
This is bad since technically you could have a namespace nested into another namespace with the same name.
If this awful pattern is done the only way to distiguish with this coarse parse is to know there is no return type defined.
TODO(Ed): We could fix this by attempting to parse a type, but we would have to have a way to have it soft fail and rollback.
*/
TokArray tokens = Context.Tokens;
s32 idx = tokens.Idx;
Token nav = tokens[ idx ];
for ( ; idx < num(tokens.Arr); idx++, nav = tokens[ idx ] )
{
if ( nav.Text[0] == '<' )
{
// Skip templated expressions as they mey have expressions with the () operators
s32 capture_level = 0;
s32 template_level = 0;
for ( ; idx < num(tokens.Arr); idx++, nav = tokens[idx] )
{
if (nav.Text[ 0 ] == '<')
++ template_level;
if (nav.Text[ 0 ] == '>')
-- template_level;
if (nav.Type == TokType::Operator && nav.Text[1] == '>')
-- template_level;
if ( nav.Type == ETokType::Capture_Start)
{
if (template_level != 0 )
++ capture_level;
else
break;
}
if ( template_level != 0 && nav.Type == ETokType::Capture_End)
-- capture_level;
}
}
if ( nav.Type == TokType::Capture_Start )
break;
}
-- idx;
Token tok_right = tokens[idx];
Token tok_left = NullToken;
if (tok_right.Type != TokType::Identifier)
{
// We're not dealing with a constructor if there is no identifier right before the opening of a parameter's scope.
return result;
}
-- idx;
tok_left = tokens[idx];
// <Attributes> <Specifiers> ... <Identifier>
bool possible_destructor = false;
if ( tok_left.Type == TokType::Operator && tok_left.Text[0] == '~')
{
possible_destructor = true;
-- idx;
tok_left = tokens[idx];
}
if ( tok_left.Type != TokType::Access_StaticSymbol )
return result;
-- idx;
tok_left = tokens[idx];
// <Attributes> <Specifiers> ... :: <Identifier>
// We search toward the left until we find the next valid identifier
s32 capture_level = 0;
s32 template_level = 0;
while ( idx != tokens.Idx )
{
if (tok_left.Text[ 0 ] == '<')
++ template_level;
if (tok_left.Text[ 0 ] == '>')
-- template_level;
if (tok_left.Type == TokType::Operator && tok_left.Text[1] == '>')
-- template_level;
if ( template_level != 0 && tok_left.Type == ETokType::Capture_Start)
++ capture_level;
if ( template_level != 0 && tok_left.Type == ETokType::Capture_End)
-- capture_level;
if ( capture_level == 0 && template_level == 0 && tok_left.Type == TokType::Identifier )
break;
-- idx;
tok_left = tokens[idx];
}
bool is_same = str_compare( tok_right.Text, tok_left.Text, tok_right.Length ) == 0;
if (tok_left.Type == TokType::Identifier && is_same)
{
// We have found the pattern we desired
if (possible_destructor)
{
// <Name> :: ~<Name> (
result = parse_destructor( specifiers );
}
else {
// <Name> :: <Name> (
result = parse_constructor( specifiers );
}
}
return result;
}
// TODO(Ed): I want to eventually change the identifier to its own AST type.
// This would allow distinction of the qualifier for a symbol <qualifier>::<nested symboL>
// This would also allow
internal
Token parse_identifier( bool* possible_member_function )
{
push_scope();
Token name = currtok;
Context.Scope->Name = name;
eat( TokType::Identifier );
// <Name>
parse_template_args( name );
// <Name><Template Args>
while ( check( TokType::Access_StaticSymbol ) )
{
eat( TokType::Access_StaticSymbol );
// <Qualifier Name> <Template Args> ::
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] == '~' )
{
bool is_destructor = str_compare( Context.Scope->Prev->ProcName, "parse_destructor" ) == 0;
if (is_destructor)
{
name.Length = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )name.Text;
Context.pop();
return name;
}
log_failure( "Error, had a ~ operator after %S but not a destructor\n%s", ETokType::to_str( prevtok.Type ), 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 );
// <Qualifier Name> <Template Args> :: <Name>
parse_template_args( name );
// <Qualifier Name> <Template Args> :: <Name> <Template Args>
}
// <Qualifier Name> <Template Args> :: <Name> <Template Args> ...
Context.pop();
return name;
}
internal
CodeInclude parse_include()
{
push_scope();
CodeInclude
include = (CodeInclude) make_code();
include->Type = ECode::Preprocess_Include;
eat( TokType::Preprocess_Include );
// #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 );
// #include <Path> or "Path"
Context.pop();
return include;
}
internal
CodeOperator parse_operator_after_ret_type(
ModuleFlag mflags
, CodeAttributes attributes
, CodeSpecifiers specifiers
, CodeType ret_type
)
{
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;
}
// <ExportFlag> <Attributes> <Specifiers> <ReturnType> <Qualifier::...>
eat( TokType::Decl_Operator );
// <ExportFlag> <Attributes> <Specifiers> <ReturnType> <Qualifier::...> 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;
bool was_new_or_delete = false;
OperatorT op = Invalid;
switch ( currtok.Text[0] )
{
case '+':
{
if ( currtok.Text[1] == '=' )
op = Assign_Add;
else 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;
}
else 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:
{
StrC str_new = to_str(OperatorT::New);
StrC str_delete = to_str(OperatorT::Delete);
if ( str_compare( currtok.Text, str_new.Ptr, max(str_new.Len - 1, currtok.Length)) == 0)
{
op = OperatorT::New;
eat( ETokType::Identifier );
was_new_or_delete = true;
s32 idx = Context.Tokens.Idx + 1;
{
while ( Context.Tokens[ idx ].Type == TokType::NewLine )
idx++;
}
Token next = Context.Tokens[idx];
if ( currtok.Type == TokType::Operator && str_compare(currtok.Text, "[]", 2) == 0)
{
eat(ETokType::Operator);
op = OperatorT::NewArray;
}
else if ( currtok.Type == TokType::BraceSquare_Open && next.Type == TokType::BraceSquare_Close)
{
eat(ETokType::BraceSquare_Open);
eat(ETokType::BraceSquare_Close);
op = OperatorT::NewArray;
}
}
else if ( str_compare( currtok.Text, str_delete.Ptr, max(str_delete.Len - 1, currtok.Length )) == 0)
{
op = OperatorT::Delete;
eat(ETokType::Identifier);
was_new_or_delete = true;
s32 idx = Context.Tokens.Idx + 1;
{
while ( Context.Tokens[ idx ].Type == TokType::NewLine )
idx++;
}
Token next = Context.Tokens[idx];
if ( currtok.Type == TokType::Operator && str_compare(currtok.Text, "[]", 2) == 0)
{
eat(ETokType::Operator);
op = OperatorT::DeleteArray;
}
else if ( currtok.Type == TokType::BraceSquare_Open && next.Type == TokType::BraceSquare_Close)
{
eat(ETokType::BraceSquare_Open);
eat(ETokType::BraceSquare_Close);
op = OperatorT::DeleteArray;
}
}
else
{
if ( op == Invalid )
{
log_failure( "Invalid operator '%s'\n%s", prevtok.Text, Context.to_string() );
Context.pop();
return CodeInvalid;
}
}
}
}
if ( op == Invalid )
{
log_failure( "Invalid operator '%s'\n%s", currtok.Text, Context.to_string() );
Context.pop();
return CodeInvalid;
}
if ( ! was_new_or_delete)
eat( currtok.Type );
// <ExportFlag> <Attributes> <Specifiers> <ReturnType> <Qualifier::...> operator <Op>
// Parse Params
CodeParam params = parse_params();
// <ExportFlag> <Attributes> <Specifiers> <ReturnType> <Qualifier::...> operator <Op> ( <Parameters> )
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 );
}
// <ExportFlag> <Attributes> <Specifiers> <ReturnType> <Qualifier::...> operator <Op> ( <Parameters> ) <Specifiers>
// 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;
}
// <ExportFlag> <Attributes> <Specifiers> <ReturnType> <Qualifier::...> operator <Op> ( <Parameters> ) <Specifiers> { ... }
}
else
{
Token stmt_end = currtok;
eat( TokType::Statement_End );
// <ExportFlag> <Attributes> <Specifiers> <ReturnType> <Qualifier::...> operator <Op> ( <Parameters> ) <Specifiers>;
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
inline_cmt = parse_comment();
// <ExportFlag> <Attributes> <Specifiers> <ReturnType> <Qualifier::...> operator <Op> ( <Parameters> ) <Specifiers>; <InlineCmt>
}
// 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 )
{
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;
// <Attributes> <Specifiers> <Macro>
}
#endif
CodeType type = parse_type();
// <Attributes> <Specifiers> <ReturnType/ValueType>
if ( type == CodeInvalid )
{
Context.pop();
return CodeInvalid;
}
bool found_operator = false;
s32 idx = Context.Tokens.Idx;
for ( ; idx < num(Context.Tokens.Arr); 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 );
// <Attributes> <Specifiers> <ReturnType> operator ...
}
else
{
Token name = parse_identifier();
Context.Scope->Name = name;
bool detected_capture = check( TokType::Capture_Start );
// Check three tokens ahead to make sure that were not dealing with a constructor initialization...
// ( 350.0f , <--- Could be the scenario
// Example : <Capture_Start> <Value> <Comma>
// idx +1 +2
bool detected_comma = Context.Tokens.Arr[ Context.Tokens.Idx + 2 ].Type == TokType::Comma;
if ( detected_capture && ! detected_comma )
{
// Dealing with a function
result = parse_function_after_name( ModuleFlag_None, attributes, specifiers, type, name );
// <Attributes> <Specifiers> <ReturnType> <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 );
// <Attributes> <Specifiers> <ValueType> <Name> ...
}
}
Context.pop();
return result;
}
internal
CodePragma parse_pragma()
{
push_scope();
CodePragma
pragma = (CodePragma) make_code();
pragma->Type = ECode::Preprocess_Pragma;
eat( TokType::Preprocess_Pragma );
// #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 );
// #pragma <Content>
Context.pop();
return pragma;
}
internal inline
CodeParam parse_params( bool use_template_capture )
{
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 };
}
else if ( check( TokType::Operator ) && currtok.Text[ 0 ] == '>' )
{
eat( TokType::Operator );
// >
Context.pop();
return { nullptr };
}
Code macro = { nullptr };
CodeType type = { nullptr };
Code value = { nullptr };
Token name = NullToken;
Code post_name_macro = { nullptr };
if ( check( TokType::Varadic_Argument ) )
{
eat( TokType::Varadic_Argument );
// ( or < ...
Context.pop();
return param_varadic;
// ( ... )
// or < ... >
}
#define CheckEndParams() \
(use_template_capture ? (currtok.Text[ 0 ] != '>') : (currtok.Type != TokType::Capture_End))
// Ex: Unreal has this type of macro: vvvvvvvvv
// COREUOBJECT_API void CallFunction( FFrame& Stack, RESULT_DECL, UFunction* Function );
// and: vvvv
// AddComponentByClass(UPARAM(meta = (AllowAbstract = "false")) TSubclassOf<UActorComponent> Class, bool bManualAttachment, ...
if ( check(TokType::Preprocess_Macro))
{
macro = parse_simple_preprocess(ETokType::Preprocess_Macro);
// ( <Macro>
}
if ( currtok.Type != TokType::Comma )
{
type = parse_type( use_template_capture );
if ( type == Code::Invalid )
{
Context.pop();
return CodeInvalid;
}
// ( <Macro> <ValueType>
if ( check( TokType::Identifier ) )
{
name = currtok;
eat( TokType::Identifier );
// ( <Macro> <ValueType> <Name>
}
// Unreal has yet another type of macro:
// template<class T UE_REQUIRES(TPointerIsConvertibleFromTo<T, UInterface>::Value)>
// class T ... and then ^this^ UE_REQUIRES shows up
// So we need to consume that.
if ( check( TokType::Preprocess_Macro ))
{
post_name_macro = parse_simple_preprocess( ETokType::Preprocess_Macro );
}
// In template captures you can have a typename have direct assignment without a name
// typename = typename ...
// Which would result in a static value type from a struct expansion (traditionally)
if ( ( name.Text || use_template_capture ) && bitfield_is_equal( u32, currtok.Flags, TF_Assign ) )
{
eat( TokType::Operator );
// ( <Macro> <ValueType> <Name> =
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;
}
s32 capture_level = 0;
s32 template_level = 0;
while ( (left && ( currtok.Type != TokType::Comma ) && template_level >= 0 && CheckEndParams()) || (capture_level > 0 || template_level > 0) )
{
if (currtok.Text[ 0 ] == '<')
++ template_level;
if (currtok.Text[ 0 ] == '>')
-- template_level;
if (currtok.Type == TokType::Operator && currtok.Text[1] == '>')
-- template_level;
if ( currtok.Type == ETokType::Capture_Start)
++ capture_level;
if ( currtok.Type == ETokType::Capture_End)
-- capture_level;
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 ) );
// ( <Macro> <ValueType> <Name> = <Expression>
}
}
CodeParam result = ( CodeParam )make_code();
result->Type = Parameters;
result->Macro = macro;
if ( name.Length > 0 )
result->Name = get_cached_string( name );
result->ValueType = type;
if ( value )
result->Value = value;
result->NumEntries++;
while ( check(TokType::Comma) )
{
eat( TokType::Comma );
// ( <Macro> <ValueType> <Name> = <Expression>,
Code type = { nullptr };
Code value = { nullptr };
if ( check( TokType::Varadic_Argument ) )
{
eat( TokType::Varadic_Argument );
result.append( param_varadic );
continue;
// ( <Macro> <ValueType> <Name> = <Expression>, ...
}
// Ex: Unreal has this type of macro: vvvvvvvvv
// COREUOBJECT_API void CallFunction( FFrame& Stack, RESULT_DECL, UFunction* Function );
// and: vvvv
// AddComponentByClass(UPARAM(meta = (AllowAbstract = "false")) TSubclassOf<UActorComponent> Class, bool bManualAttachment, ...
if ( check(TokType::Preprocess_Macro))
{
macro = parse_simple_preprocess(ETokType::Preprocess_Macro);
// ( <Macro>
}
if ( currtok.Type != TokType::Comma )
{
type = parse_type( use_template_capture );
if ( type == Code::Invalid )
{
Context.pop();
return CodeInvalid;
}
// ( <Macro> <ValueType> <Name> = <Expression>, <Macro> <ValueType>
name = { nullptr, 0, TokType::Invalid, false };
if ( check( TokType::Identifier ) )
{
name = currtok;
eat( TokType::Identifier );
// ( <Macro> <ValueType> <Name> = <Expression>, <Macro> <ValueType> <Name>
}
// Unreal has yet another type of macro:
// template<class T UE_REQUIRES(TPointerIsConvertibleFromTo<T, UInterface>::Value)>
// class T ... and then ^this^ UE_REQUIRES shows up
// So we need to consume that.
if ( check( TokType::Preprocess_Macro ))
{
post_name_macro = parse_simple_preprocess( ETokType::Preprocess_Macro );
}
// In template captures you can have a typename have direct assignment without a name
// typename = typename ...
// Which would result in a static value type from a struct expansion (traditionally)
if ( ( name.Text || use_template_capture ) && bitfield_is_equal( u32, currtok.Flags, TF_Assign ) )
{
eat( TokType::Operator );
// ( <Macro> <ValueType> <Name> = <Expression>, <Macro> <ValueType> <Name> =
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;
}
s32 capture_level = 0;
s32 template_level = 0;
while ( (left
&& currtok.Type != TokType::Comma
&& template_level >= 0
&& CheckEndParams()) || (capture_level > 0 || template_level > 0) )
{
if (currtok.Text[ 0 ] == '<')
++ template_level;
if (currtok.Text[ 0 ] == '>')
-- template_level;
if (currtok.Type == TokType::Operator && currtok.Text[1] == '>')
-- template_level;
if ( currtok.Type == ETokType::Capture_Start)
++ capture_level;
if ( currtok.Type == ETokType::Capture_End)
-- capture_level;
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 ) );
// ( <Macro> <ValueType> <Name> = <Expression>, <Macro> <ValueType> <Name> = <Expression>
}
// ( <Macro> <ValueType> <Name> = <Expression>, <Macro> <ValueType> <Name> = <Expression>, ..
}
CodeParam param = ( CodeParam )make_code();
param->Type = Parameters;
param->Macro = macro;
if ( name.Length > 0 )
param->Name = get_cached_string( name );
param->PostNameMacro = post_name_macro;
param->ValueType = type;
if ( value )
param->Value = value;
result.append( param );
}
if ( ! use_template_capture )
eat( TokType::Capture_End );
// ( <Macro> <ValueType> <Name> = <Expression>, <Macro> <ValueType> <Name> = <Expression>, .. )
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 );
// < <Macro> <ValueType> <Name> = <Expression>, <Macro> <ValueType> <Name> = <Expression>, .. >
}
Context.pop();
return result;
#undef context
}
internal
CodePreprocessCond parse_preprocess_cond()
{
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 - ( TokType::Preprocess_If - ECode::Preprocess_If ) );
eat( currtok.Type );
// #<Conditional>
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 );
// #<Conditiona> <Content>
Context.pop();
return cond;
}
internal inline
Code parse_simple_preprocess( TokType which )
{
// TODO(Ed): We can handle a macro a bit better than this. It's AST can be made more robust..
// Make an AST_Macro, it should have an Name be the macro itself, with the function body being an optional function body node.
// If we want it to terminate or have an inline comment we can possbily use its parent typedef for that info...
push_scope();
Token tok = currtok;
eat( which );
// <Macro>
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 );
// <Macro> {
// TODO(Ed) : Parse this properly later (expression and statement support)
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 );
// <Macro> { <Body> }
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 );
// <Macro> { <Content> };
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
eat( TokType::Comment );
// <Macro> { <Content> }; <InlineCmt>
}
}
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 );
// <Macro>;
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
eat( TokType::Comment );
// <Macro>; <InlineCmt>
}
}
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()
{
push_scope();
Code
assert = make_code();
assert->Type = ECode::Untyped;
Token content = currtok;
Context.Scope->Name = content;
eat( TokType::StaticAssert );
eat( TokType::Capture_Start );
// static_assert(
// TODO(Ed) : Parse this properly.
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 );
// static_assert( <Content> );
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( Token& token )
{
if ( currtok.Type == TokType::Operator && currtok.Text[ 0 ] == '<' && currtok.Length == 1 )
{
eat( TokType::Operator );
// <
s32 level = 0;
while ( left && level >= 0 && ( currtok.Text[ 0 ] != '>' || level > 0 ) )
{
if ( currtok.Text[ 0 ] == '<' )
level++;
if ( currtok.Text[ 0 ] == '>' )
level--;
if ( currtok.Type == TokType::Operator && currtok.Text[1] == '>')
level--;
eat( currtok.Type );
}
// < <Content>
// Due to the >> token, this could have been eaten early...
if (level == 0)
eat( TokType::Operator );
// < <Content> >
// 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
)
{
push_scope();
Code array_expr = parse_array_decl();
Code expr = { nullptr };
Code bitfield_expr = { nullptr };
b32 using_constructor_initializer = false;
if ( bitfield_is_equal( u32, currtok.Flags, TF_Assign ) )
{
// <Attributes> <Specifiers> <ValueType> <Name> = <Expression>
expr = parse_assignment_expression();
}
if ( currtok.Type == TokType::BraceCurly_Open )
{
Token expr_tok = currtok;
eat( TokType::BraceCurly_Open );
// <Attributes> <Specifiers> <ValueType> <Name> {
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 );
// <Attributes> <Specifiers> <ValueType> <Name> = { <Expression> }
}
if ( currtok.Type == TokType::Capture_Start )
{
eat( TokType:: Capture_Start);
// <Attributes> <Specifiers> <ValueType> <Name> (
Token expr_token = currtok;
using_constructor_initializer = true;
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 > 0 )
level--;
eat( currtok.Type );
}
expr_token.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)expr_token.Text;
expr = untyped_str( expr_token );
eat( TokType::Capture_End );
// <Attributes> <Specifiers> <ValueType> <Name> ( <Expression> )
}
if ( currtok.Type == TokType::Assign_Classifer )
{
eat( TokType::Assign_Classifer );
// <Attributes> <Specifiers> <ValueType> <Name> :
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 );
// <Attributes> <Specifiers> <ValueType> <Name> : <Expression>
}
CodeVar next_var = NoCode;
Token stmt_end = NullToken;
CodeComment inline_cmt = NoCode;
if ( type )
{
if ( currtok.Type == TokType::Comma )
{
// Were dealing with a statement with more than one declaration
// This is only handled this way if its the first declaration
// Otherwise its looped through in parse_variable_declaration_list
next_var = parse_variable_declaration_list();
// <Attributes> <Specifiers> <ValueType> <Name> : <Expression>, ...
// <Attributes> <Specifiers> <ValueType> <Name> = <Expression>, ...
// <Attributes> <Specifiers> <ValueType> <Name> { <Expression> }, ...
}
// If we're dealing with a "comma-procedding then we cannot expect a statement end or inline comment
// Any comma procedding variable will not have a type provided so it can act as a indicator to skip this
Token stmt_end = currtok;
eat( TokType::Statement_End );
// <Attributes> <Specifiers> <ValueType> <Name> : <Expression>, ...;
// <Attributes> <Specifiers> <ValueType> <Name> = <Expression>, ...;
// <Attributes> <Specifiers> <ValueType> <Name> { <Expression> }, ...;
// Check for inline comment : <type> <identifier> = <expression>; // <inline comment>
if ( left && ( currtok_noskip.Type == TokType::Comment ) && currtok_noskip.Line == stmt_end.Line )
{
inline_cmt = parse_comment();
// <Attributes> <Specifiers> <ValueType> <Name> : <Expression>, ...; <InlineCmt>
// <Attributes> <Specifiers> <ValueType> <Name> = <Expression>, ...; <InlineCmt>
// <Attributes> <Specifiers> <ValueType> <Name> { <Expression> }, ...; <InlineCmt>
}
}
using namespace ECode;
CodeVar
result = (CodeVar) make_code();
result->Type = Variable;
result->Name = get_cached_string( name );
result->ModuleFlags = mflags;
// Type can be null if we're dealing with a declaration from a variable declaration-list
if ( type )
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;
if ( next_var )
{
result->NextVar = next_var;
result->NextVar->Parent = result;
}
result->VarConstructorInit = using_constructor_initializer;
Context.pop();
return result;
}
/*
Note(Ed): This does not support the following:
* Function Pointers
*/
internal
CodeVar parse_variable_declaration_list()
{
push_scope();
CodeVar result = NoCode;
CodeVar last_var = NoCode;
while ( check( TokType::Comma ) )
{
eat( TokType::Comma );
// ,
CodeSpecifiers specifiers = NoCode;
while ( left && currtok.is_specifier() )
{
SpecifierT spec = ESpecifier::to_type( currtok );
switch ( spec )
{
case ESpecifier::Const:
if ( specifiers->NumEntries && specifiers->ArrSpecs[ specifiers->NumEntries - 1 ] != ESpecifier::Ptr )
{
log_failure( "Error, const specifier must come after pointer specifier for variable declaration proceeding comma\n"
"(Parser will add and continue to specifiers, but will most likely fail to compile)\n%s"
, Context.to_string() );
specifiers.append( spec );
}
break;
case ESpecifier::Ptr:
case ESpecifier::Ref:
case ESpecifier::RValue:
break;
default:
{
log_failure( "Error, invalid specifier '%s' proceeding comma\n"
"(Parser will add and continue to specifiers, but will most likely fail to compile)\n%s"
, currtok.Text, Context.to_string() );
continue;
}
break;
}
// eat(currtok.Type);
if ( specifiers )
specifiers.append( spec );
else
specifiers = def_specifier( spec );
}
// , <Specifiers>
StrC name = currtok;
eat( TokType::Identifier );
// , <Specifiers> <Name>
CodeVar var = parse_variable_after_name( ModuleFlag_None, NoCode, specifiers, NoCode, name );
// , <Specifiers> <Name> ...
if ( ! result )
{
result.ast = var.ast;
last_var.ast = var.ast;
}
else
{
last_var->NextVar.ast = var.ast;
last_var->NextVar->Parent.ast = rcast(AST*, var.ast);
last_var.ast = var.ast;
}
}
Context.pop();
return result;
}
internal
CodeClass parse_class( bool inplace_def )
{
push_scope();
CodeClass result = (CodeClass) parse_class_struct( TokType::Decl_Class, inplace_def );
Context.pop();
return result;
}
internal
CodeConstructor parse_constructor( CodeSpecifiers specifiers )
{
push_scope();
Token identifier = parse_identifier();
CodeParam params = parse_params();
// <Name> ( <Parameters> )
Code initializer_list = NoCode;
CodeBody body = NoCode;
CodeComment inline_cmt = NoCode;
// TODO(Ed) : Need to support postfix specifiers
if ( check( TokType::Assign_Classifer ) )
{
eat( TokType::Assign_Classifer );
// <Name> ( <Parameters> ) :
Token initializer_list_tok = currtok;
s32 level = 0;
while ( left && ( currtok.Type != TokType::BraceCurly_Open || level > 0 ) )
{
if (currtok.Type == TokType::Capture_Start)
level++;
else if ( currtok.Type == TokType::Capture_End )
level--;
eat( currtok.Type );
}
initializer_list_tok.Length = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )initializer_list_tok.Text;
// <Name> ( <Parameters> ) : <InitializerList>
initializer_list = untyped_str( initializer_list_tok );
// TODO(Ed): Constructors can have post-fix specifiers
body = parse_function_body();
// <Name> ( <Parameters> ) : <InitializerList> { <Body> }
}
else if ( check( TokType::BraceCurly_Open ) )
{
body = parse_function_body();
// <Name> ( <Parameters> ) { <Body> }
}
else if ( check( TokType::Operator) && currtok.Text[ 0 ] == '=' )
{
body = parse_assignment_expression();
}
else
{
Token stmt_end = currtok;
eat( TokType::Statement_End );
// <Name> ( <Parameters> );
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
inline_cmt = parse_comment();
// <Name> ( <Parameters> ); <InlineCmt>
}
CodeConstructor result = ( CodeConstructor )make_code();
result->Name = get_cached_string(identifier);
result->Specs = specifiers;
if ( params )
result->Params = params;
if ( initializer_list )
result->InitializerList = initializer_list;
if ( body && body->Type == ECode::Function_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;
}
internal
CodeDestructor parse_destructor( CodeSpecifiers specifiers )
{
push_scope();
bool has_context = Context.Scope && Context.Scope->Prev;
bool is_in_global_nspace = has_context && str_compare( Context.Scope->Prev->ProcName, "parse_global_nspace" ) == 0;
if ( check( TokType::Spec_Virtual ) )
{
if ( specifiers )
specifiers.append( ESpecifier::Virtual );
else
specifiers = def_specifier( ESpecifier::Virtual );
eat( TokType::Spec_Virtual );
}
// <Virtual Specifier>
Token prefix_identifier = NullToken;
if (is_in_global_nspace)
prefix_identifier = parse_identifier();
if ( left && currtok.Text[ 0 ] == '~' )
eat( TokType::Operator );
else
{
log_failure( "Expected destructor '~' token\n%s", Context.to_string() );
return CodeInvalid;
}
// <Virtual Specifier> ~
Token identifier = parse_identifier();
CodeBody body = { nullptr };
CodeComment inline_cmt = NoCode;
// <Virtual Specifier> ~<Name>
eat( TokType::Capture_Start );
eat( TokType::Capture_End );
// <Virtual Specifier> ~<Name>()
bool pure_virtual = false;
if ( check( TokType::Operator ) && currtok.Text[ 0 ] == '=' )
{
// <Virtual Specifier> ~<Name>() =
bool skip_formatting = true;
Token next = Context.Tokens.next(skip_formatting);
if ( left && next.Text[ 0 ] == '0' )
{
eat( TokType::Operator );
eat( TokType::Number );
// <Virtual Specifier> ~<Name>() = 0
specifiers.append( ESpecifier::Pure );
}
else if ( left && str_compare( next.Text, "default", sizeof("default") - 1 ) == 0)
{
body = parse_assignment_expression();
// <Virtual Specifier> ~<
}
else
{
log_failure( "Pure or default specifier expected due to '=' token\n%s", Context.to_string() );
return CodeInvalid;
}
pure_virtual = true;
}
if ( ! pure_virtual && check( TokType::BraceCurly_Open ) )
body = parse_function_body();
// <Virtual Specifier> ~<Name>() { ... }
else
{
Token stmt_end = currtok;
eat( TokType::Statement_End );
// <Virtual Specifier> ~<Name>() <Pure Specifier>;
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
inline_cmt = parse_comment();
// <Virtual Specifier> ~<Name>() <Pure Specifier>; <InlineCmt>
}
CodeDestructor result = ( CodeDestructor )make_code();
if ( prefix_identifier )
{
prefix_identifier.Length += 1 + identifier.Length;
result->Name = get_cached_string( prefix_identifier );
}
if ( specifiers )
result->Specs = specifiers;
if ( body && body->Type == ECode::Function_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;
}
internal
CodeEnum parse_enum( bool inplace_def )
{
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 );
// enum
if ( currtok.Type == TokType::Decl_Class )
{
eat( TokType::Decl_Class);
is_enum_class = true;
// enum class
}
attributes = parse_attributes();
// enum <class> <Attributes>
if ( check( TokType::Identifier ) )
{
name = currtok;
Context.Scope->Name = currtok;
eat( TokType::Identifier );
}
// enum <class> <Attributes> <Name>
b32 use_macro_underlying = false;
Code underlying_macro = { nullptr };
if ( currtok.Type == TokType::Assign_Classifer )
{
eat( TokType::Assign_Classifer );
// enum <class> <Attributes> <Name> :
type = parse_type();
if ( type == Code::Invalid )
{
log_failure( "Failed to parse enum classifier\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
// enum <class> <Attributes> <Name> : <UnderlyingType>
}
else if ( currtok.Type == TokType::Preprocess_Define )
{
// We'll support the enum_underlying macro
StrC sig = txt("enum_underlying");
if (currtok.Length >= sig.Len && str_compare(currtok.Text, sig.Ptr, sig.Len) == 0 )
{
use_macro_underlying = true;
underlying_macro = parse_simple_preprocess( ETokType::Preprocess_Macro);
}
}
CodeBody body = { nullptr };
if ( currtok.Type == TokType::BraceCurly_Open )
{
body = (CodeBody) make_code();
body->Type = ECode::Enum_Body;
eat( TokType::BraceCurly_Open );
// enum <class> <Attributes> <Name> : <UnderlyingType> {
Code member = CodeInvalid;
bool expects_entry = true;
while ( left && currtok_noskip.Type != TokType::BraceCurly_Close )
{
if ( ! expects_entry )
{
log_failure( "Did not expect an entry after last member of enum body.\n%s", Context.to_string() );
Context.pop();
break;
}
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();
// #define
break;
case TokType::Preprocess_If:
case TokType::Preprocess_IfDef:
case TokType::Preprocess_IfNotDef:
case TokType::Preprocess_ElIf:
member = parse_preprocess_cond();
// #<if, ifdef, ifndef, elif> ...
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 );
// <Macro>
break;
case TokType::Preprocess_Pragma:
member = parse_pragma();
// #pragma
break;
case TokType::Preprocess_Unsupported:
member = parse_simple_preprocess( TokType::Preprocess_Unsupported );
// #<UNSUPPORTED>
break;
default:
Token entry = currtok;
eat( TokType::Identifier);
// <Name>
if ( currtok.Type == TokType::Operator && currtok.Text[0] == '=' )
{
eat( TokType::Operator );
// <Name> =
while ( currtok_noskip.Type != TokType::Comma && currtok_noskip.Type != TokType::BraceCurly_Close )
{
eat( currtok_noskip.Type );
}
}
// <Name> = <Expression>
// Unreal UMETA macro support
if ( currtok.Type == TokType::Preprocess_Macro )
{
eat( TokType::Preprocess_Macro );
// <Name> = <Expression> <Macro>
}
if ( currtok.Type == TokType::Comma )
{
eat( TokType::Comma );
// <Name> = <Expression> <Macro>,
}
// Consume inline comments
// if ( currtok.Type == TokType::Comment && prevtok.Line == currtok.Line )
// {
// eat( TokType::Comment );
// <Name> = <Expression> <Macro>, // <Inline Comment>
// }
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 );
// enum <class> <Attributes> <Name> : <UnderlyingType> { <Body> }
}
CodeComment inline_cmt = NoCode;
if ( ! inplace_def )
{
Token stmt_end = currtok;
eat( TokType::Statement_End );
// enum <class> <Attributes> <Name> : <UnderlyingType> { <Body> };
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
inline_cmt = parse_comment();
// enum <class> <Attributes> <Name> : <UnderlyingType> { <Body> }; <InlineCmt>
}
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->EnumUnderlyingMacro = use_macro_underlying;
if ( use_macro_underlying )
result->UnderlyingTypeMacro = underlying_macro;
else
result->UnderlyingType = type;
}
if ( inline_cmt )
result->InlineCmt = inline_cmt;
Context.pop();
return result;
}
internal inline
CodeBody parse_export_body()
{
push_scope();
CodeBody result = parse_global_nspace( ECode::Export_Body );
Context.pop();
return result;
}
internal inline
CodeBody parse_extern_link_body()
{
push_scope();
CodeBody result = parse_global_nspace( ECode::Extern_Linkage_Body );
Context.pop();
return result;
}
internal
CodeExtern parse_extern_link()
{
push_scope();
eat( TokType::Decl_Extern_Linkage );
// extern
Token name = currtok;
eat( TokType::String );
// extern "<Name>"
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;
}
// extern "<Name>" { <Body> }
result->Body = entry;
Context.pop();
return result;
}
internal
CodeFriend parse_friend()
{
using namespace ECode;
push_scope();
eat( TokType::Decl_Friend );
// friend
CodeFn function = { nullptr };
// Type declaration or return type
CodeType type = parse_type();
if ( type == Code::Invalid )
{
Context.pop();
return CodeInvalid;
}
// friend <Type>
// Funciton declaration
if ( currtok.Type == TokType::Identifier )
{
// Name
Token name = parse_identifier();
Context.Scope->Name = name;
// friend <ReturnType> <Name>
function = parse_function_after_name( ModuleFlag_None, NoCode, NoCode, type, name );
// Parameter list
// CodeParam params = parse_params();
// friend <ReturnType> <Name> ( <Parameters> )
// function = make_code();
// function->Type = Function_Fwd;
// function->Name = get_cached_string( name );
// function->ReturnType = type;
// if ( params )
// function->Params = params;
}
CodeComment inline_cmt = NoCode;
if ( function && function->Type == ECode::Function_Fwd )
{
Token stmt_end = currtok;
eat( TokType::Statement_End );
// friend <Type>;
// friend <ReturnType> <Name> ( <Parameters> );
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
inline_cmt = parse_comment();
// friend <Type>; <InlineCmt>
// friend <ReturnType> <Name> ( <Parameters> ); <InlineCmt>
}
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;
}
internal
CodeFn parse_function()
{
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 );
}
// <export>
attributes = parse_attributes();
// <export> <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 );
}
// <export> <Attributes> <Specifiers>
CodeType ret_type = parse_type();
if ( ret_type == Code::Invalid )
{
Context.pop();
return CodeInvalid;
}
// <export> <Attributes> <Specifiers> <ReturnType>
Token name = parse_identifier();
Context.Scope->Name = name;
if ( ! name )
{
Context.pop();
return CodeInvalid;
}
// <export> <Attributes> <Specifiers> <ReturnType> <Name>
CodeFn result = parse_function_after_name( mflags, attributes, specifiers, ret_type, name );
// <export> <Attributes> <Specifiers> <ReturnType> <Name> ...
Context.pop();
return result;
}
internal
CodeNS parse_namespace()
{
push_scope();
eat( TokType::Decl_Namespace );
// namespace
Token name = parse_identifier();
Context.Scope->Name = name;
// namespace <Name>
CodeBody body = parse_global_nspace( ECode::Namespace_Body );
if ( body == Code::Invalid )
{
Context.pop();
return CodeInvalid;
}
// namespace <Name> { <Body> }
CodeNS
result = (CodeNS) make_code();
result->Type = ECode::Namespace;
result->Name = get_cached_string( name );
result->Body = body;
Context.pop();
return result;
}
internal
CodeOperator parse_operator()
{
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 );
}
// <export>
attributes = parse_attributes();
// <export> <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 );
}
// <export> <Attributes> <Specifiers>
// Parse Return Type
CodeType ret_type = parse_type();
// <export> <Attributes> <Specifiers> <ReturnType>
CodeOperator result = parse_operator_after_ret_type( mflags, attributes, specifiers, ret_type );
// <export> <Attributes> <Specifiers> <ReturnType> ...
Context.pop();
return result;
}
internal
CodeOpCast parse_operator_cast( CodeSpecifiers specifiers )
{
push_scope();
// 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 );
// <Specifiers> <Qualifier>
if ( currtok.Type == TokType::Access_StaticSymbol )
eat( TokType::Access_StaticSymbol );
// <Specifiers> <Qualifier> ::
}
// <Specifiers> <Qualifier> :: ...
name.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)name.Text;
}
eat( TokType::Decl_Operator );
// <Specifiers> <Qualifier> :: ... operator
Code type = parse_type();
// <Specifiers> <Qualifier> :: ... operator <UnderlyingType>
Context.Scope->Name = { type->Name.Data, length(type->Name) };
eat( TokType::Capture_Start );
eat( TokType::Capture_End );
// <Specifiers> <Qualifier> :: ... operator <UnderlyingType>()
// TODO(Ed) : operator cast can have const, volatile, l-value, r-value noexecept qualifying specifiers.
if ( check(TokType::Spec_Const))
{
if ( specifiers.ast == nullptr )
specifiers = def_specifier( ESpecifier::Const );
else
specifiers.append( ESpecifier::Const );
eat( TokType::Spec_Const );
}
// <Specifiers> <Qualifier> :: ... operator <UnderlyingType>() <const>
Code body = NoCode;
CodeComment inline_cmt = NoCode;
if ( check( TokType::BraceCurly_Open) )
{
eat( TokType::BraceCurly_Open );
// <Specifiers> <Qualifier> :: ... operator <UnderlyingType>() <const> {
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 );
// <Specifiers> <Qualifier> :: ... operator <UnderlyingType>() <const> { <Body> }
body = untyped_str( body_str );
}
else
{
Token stmt_end = currtok;
eat( TokType::Statement_End );
// <Specifiers> <Qualifier> :: ... operator <UnderlyingType>() <const>;
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
inline_cmt = parse_comment();
// <Specifiers> <Qualifier> :: ... operator <UnderlyingType>() <const>; <InlineCmt>
}
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;
}
internal inline
CodeStruct parse_struct( bool inplace_def )
{
push_scope();
CodeStruct result = (CodeStruct) parse_class_struct( TokType::Decl_Struct, inplace_def );
Context.pop();
return result;
}
internal
CodeTemplate parse_template()
{
#define UseTemplateCapture true
push_scope();
ModuleFlag mflags = ModuleFlag_None;
if ( check( TokType::Module_Export ) )
{
mflags = ModuleFlag_Export;
eat( TokType::Module_Export );
}
// <export> template
eat( TokType::Decl_Template );
// <export> template
Code params = parse_params( UseTemplateCapture );
if ( params == Code::Invalid )
{
Context.pop();
return CodeInvalid;
}
// <export> template< <Parameters> >
Code definition = { nullptr };
while ( left )
{
if ( check( TokType::Decl_Class ) )
{
definition = parse_class();
// <export> template< <Parameters> > class ...
break;
}
if ( check( TokType::Decl_Struct ) )
{
definition = parse_struct();
// <export> template< <Parameters> > struct ...
break;
}
if ( check( TokType::Decl_Union ) )
{
definition = parse_union();
// <export> template< <Parameters> > union ...
break;
}
if ( check( TokType::Decl_Using ) )
{
definition = parse_using();
// <export> template< <Parameters> > 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();
// <export> template< <Parameters> > <Attributes>
// Specifiers Parsing
{
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::ForceInline :
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 )
break;
specs_found[ NumSpecifiers ] = spec;
NumSpecifiers++;
eat( currtok.Type );
}
if ( NumSpecifiers )
{
specifiers = def_specifiers( NumSpecifiers, specs_found );
}
// <export> template< <Parameters> > <Attributes> <Specifiers>
}
bool has_context = Context.Scope && Context.Scope->Prev;
bool is_in_global_nspace = has_context && str_compare( Context.Scope->Prev->ProcName, "parse_global_nspace" ) == 0;
// Possible constructor implemented at global file scope.
if (is_in_global_nspace)
{
Code constructor_destructor = parse_global_nspace_constructor_destructor( specifiers );
if ( constructor_destructor )
{
definition = constructor_destructor;
// <Attributes> <Specifiers> <Name> :: <Name> <Type> () { ... }
break;
}
}
// Possible user Defined operator casts
if (is_in_global_nspace)
{
bool found_operator_cast_outside_class_implmentation = false;
s32 idx = Context.Tokens.Idx;
for ( ; idx < num(Context.Tokens.Arr); 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_outside_class_implmentation = true;
break;
}
if ( found_operator_cast_outside_class_implmentation )
{
definition = parse_operator_cast( specifiers );
// <Attributes> <Specifiers> <Name> :: operator <Type> () { ... }
break;
}
}
definition = parse_operator_function_or_variable( expects_function, attributes, specifiers );
// <export> template< <Parameters> > <Attributes> <Specifiers> ...
break;
}
CodeTemplate result = ( CodeTemplate )make_code();
result->Type = ECode::Template;
result->Params = params;
result->Declaration = definition;
result->ModuleFlags = mflags;
// result->Name = definition->Name;
Context.pop();
return result;
#undef UseTemplateCapture
}
/*
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 from_template, bool* typedef_is_function )
{
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();
// <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 );
}
// <Attributes> <Specifiers>
if ( left == 0 )
{
log_failure( "Error, unexpected end of type definition\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
if ( from_template && currtok.Type == TokType::Decl_Class )
{
// If a value's type is being parsed from a template, class can be used instead of typename.
name = currtok;
eat(TokType::Decl_Class);
// <class>
}
// All kinds of nonsense can makeup a type signature, first we check for a in-place definition of a class, enum, struct, or union
else if ( currtok.Type == TokType::Decl_Class || currtok.Type == TokType::Decl_Enum || currtok.Type == TokType::Decl_Struct
|| currtok.Type == TokType::Decl_Union )
{
eat( currtok.Type );
// <Attributes> <Specifiers> <class, enum, struct, union>
name = parse_identifier();
// name.Length = ( ( sptr )currtok.Text + currtok.Length ) - ( sptr )name.Text;
// eat( TokType::Identifier );
Context.Scope->Name = name;
// <Attributes> <Specifiers> <class, enum, struct, union> <Name>
}
// Decltype draft implementaiton
#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 );
// <Attributes> <Specifiers> 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;
// <Attributes> <Specifiers> decltype( <Expression > )
}
#endif
// Check if native type keywords are used, eat them for the signature.
// <attributes> <specifiers> <native types ...> ...
else if ( currtok.Type >= TokType::Type_Unsigned && currtok.Type <= TokType::Type_MS_W64 )
{
// TODO(Ed) : Review this... Its necessary for parsing however the algo's path to this is lost...
name = currtok;
eat( currtok.Type );
while ( left && currtok.Type >= TokType::Type_Unsigned && currtok.Type <= TokType::Type_MS_W64 )
{
eat( currtok.Type );
}
name.Length = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )name.Text;
// <Attributes> <Specifiers> <Compound type expression>
}
else if ( currtok.Type == TokType::Type_Typename )
{
name = currtok;
eat(TokType::Type_Typename);
// <typename>
if ( ! from_template )
{
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;
}
}
}
// 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;
}
// <Attributes> <Specifiers> <Qualifier ::> <Identifier>
// <Attributes> <Specifiers> <Identifier>
}
// 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
// <Attributes> <Specifiers> <Identifier> <Specifiers>
// 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 has_context = Context.Scope && Context.Scope->Prev;
bool is_for_opcast = has_context && 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
// <Attributes> <ReturnType>
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();
}
// <Attributes> <ReturnType> <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 );
// <Attributes> <ReturnType> (
// 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;
// <Attributes> <ReturnType> ( <Specifiers>
if ( check( TokType::Identifier ) )
name = parse_identifier();
// <Attributes> <ReturnType> ( <Specifiers> <Identifier>
// Immeidate parameters
if ( check( TokType::Capture_Start ) )
params_nested = parse_params();
// <Attributes> <ReturnType> ( <Specifiers> <Identifier> ( <Parameters> )
eat( TokType::Capture_End );
// <Attributes> <ReturnType> ( <Specifiers> <Identifier> ( <Parameters> ) )
#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 );
// <Attributes> <ReturnType> (
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 );
// <Attributes> <ReturnType> ( <Expression> )
name.Length = ( ( sptr )prevtok.Text + prevtok.Length ) - ( sptr )name.Text;
#endif
}
// Were now dealing with the parameters of the function
params = parse_params();
// <Attributes> <ReturnType> <All Kinds of nonsense> ( <Parameters> )
// 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, l-value, volatile, l-value, etc
// && 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
// <Attributes> <ReturnType> <All Kinds of nonsense> ( <Parameters> ) <Specifiers>
}
// <Attributes> <All Kinds of nonsense>
bool is_param_pack = false;
if ( check( TokType::Varadic_Argument ) )
{
is_param_pack = true;
eat( TokType::Varadic_Argument );
// <Attributes> <All kinds of nonsense> ...
}
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;
}
internal
CodeTypedef parse_typedef()
{
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 );
}
// <ModuleFlags>
eat( TokType::Decl_Typedef );
// <ModuleFlags> 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 );
// <ModuleFalgs> typedef <Preprocessed_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;
// This code is highly correlated with parse_complicated_definition
if ( is_complicated )
{
TokArray tokens = Context.Tokens;
s32 idx = tokens.Idx;
s32 level = 0;
for ( ; idx < num(tokens.Arr); 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_forward_or_definition( currtok.Type, from_typedef );
// <ModuleFalgs> typedef <UnderlyingType: Forward Decl>
}
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;
}
// TODO(Ed) : I'm not sure if I have to use parse_type here, I'd rather not as that would complicate parse_type.
// type = parse_type();
type = parse_forward_or_definition( currtok.Type, from_typedef );
// <ModuleFalgs> typedef <UnderlyingType>
}
else if ( tok.Type == TokType::BraceCurly_Close )
{
// Its a definition
// <which> { ... };
type = parse_forward_or_definition( currtok.Type, from_typedef );
// <ModuleFalgs> typedef <UnderlyingType>
}
else if ( tok.Type == TokType::BraceSquare_Close)
{
// Its an array definition
// <which> <type_identifier> <identifier> [ ... ];
type = parse_type();
// <ModuleFalgs> typedef <UnderlyingType>
}
else
{
log_failure( "Unsupported or bad member definition after struct declaration\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
}
else
{
bool from_template = false;
type = parse_type( from_template, &is_function );
// <ModuleFalgs> typedef <UnderlyingType>
}
if ( check( TokType::Identifier ) )
{
name = currtok;
eat( TokType::Identifier );
// <ModuleFalgs> typedef <UnderlyingType> <Name>
}
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();
// <UnderlyingType> + <ArrayExpr>
}
Token stmt_end = currtok;
eat( TokType::Statement_End );
// <ModuleFalgs> typedef <UnderlyingType> <Name>;
CodeComment inline_cmt = NoCode;
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
inline_cmt = parse_comment();
// <ModuleFalgs> typedef <UnderlyingType> <Name> <ArrayExpr>; <InlineCmt>
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;
}
if ( type )
{
result->UnderlyingType = type;
result->UnderlyingType->Parent = rcast(AST*, result.ast);
}
// Type needs to be aware of its parent so that it can be serialized properly.
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;
}
internal neverinline
CodeUnion parse_union( bool inplace_def )
{
push_scope();
ModuleFlag mflags = ModuleFlag_None;
if ( check(TokType::Module_Export) )
{
mflags = ModuleFlag_Export;
eat( TokType::Module_Export );
}
// <ModuleFlags>
eat( TokType::Decl_Union );
// <ModuleFlags> union
CodeAttributes attributes = parse_attributes();
// <ModuleFlags> union <Attributes>
StrC name = { 0, nullptr };
if ( check( TokType::Identifier ) )
{
name = currtok;
Context.Scope->Name = currtok;
eat( TokType::Identifier );
}
// <ModuleFlags> union <Attributes> <Name>
CodeBody body = { nullptr };
eat( TokType::BraceCurly_Open );
// <ModuleFlags> union <Attributes> <Name> {
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:
member = fmt_newline;
eat( TokType::NewLine );
break;
case TokType::Comment:
member = parse_comment();
break;
// TODO(Ed) : Unions can have constructors and destructors
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 );
}
// <ModuleFlags> union <Attributes> <Name> { <Body>
eat( TokType::BraceCurly_Close );
// <ModuleFlags> union <Attributes> <Name> { <Body> }
if ( ! inplace_def )
eat( TokType::Statement_End );
// <ModuleFlags> union <Attributes> <Name> { <Body> };
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;
}
internal
CodeUsing parse_using()
{
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 );
}
// <ModuleFlags>
eat( TokType::Decl_Using );
// <ModuleFlags> using
if ( currtok.Type == TokType::Decl_Namespace )
{
is_namespace = true;
eat( TokType::Decl_Namespace );
// <ModuleFlags> using namespace
}
name = currtok;
Context.Scope->Name = name;
eat( TokType::Identifier );
// <ModuleFlags> using <namespace> <Name>
if ( ! is_namespace )
{
if ( bitfield_is_equal( u32, currtok.Flags, TF_Assign ) )
{
attributes = parse_attributes();
// <ModuleFlags> using <Name> <Attributes>
eat( TokType::Operator );
// <ModuleFlags> using <Name> <Attributes> =
type = parse_type();
// <ModuleFlags> using <Name> <Attributes> = <UnderlyingType>
array_expr = parse_array_decl();
// <UnderlyingType> + <ArrExpr>
}
}
Token stmt_end = currtok;
eat( TokType::Statement_End );
// <ModuleFlags> using <namespace> <Attributes> <Name> = <UnderlyingType>;
CodeComment inline_cmt = NoCode;
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
{
inline_cmt = parse_comment();
}
// <ModuleFlags> using <namespace> <Attributes> <Name> = <UnderlyingType>; <InlineCmt>
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;
}
internal
CodeVar parse_variable()
{
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 );
}
// <ModuleFlags>
attributes = parse_attributes();
// <ModuleFlags> <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 );
}
// <ModuleFlags> <Attributes> <Specifiers>
CodeType type = parse_type();
// <ModuleFlags> <Attributes> <Specifiers> <ValueType>
if ( type == Code::Invalid )
return CodeInvalid;
Context.Scope->Name = parse_identifier();
// <ModuleFlags> <Attributes> <Specifiers> <ValueType> <Name>
CodeVar result = parse_variable_after_name( mflags, attributes, specifiers, type, Context.Scope->Name );
// Regular : <ModuleFlags> <Attributes> <Specifiers> <ValueType> <Name> = <Value>; <InlineCmt>
// Bitfield : <ModuleFlags> <Attributes> <Specifiers> <ValueType> <Name> : <BitfieldSize> = <Value>; <InlineCmt>
Context.pop();
return result;
}
// namespace parser
}
#ifdef CHECK_WAS_DEFINED
#pragma pop_macro("check")
#endif
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