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f67f9547df
gencpp/project/components/parser.cpp
Ed_ f67f9547df WIP: Improvements to parser, updated docs 
Trying to get support for typename keyword soon
2023-11-21 21:27:33 -05:00

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#ifdef GEN_INTELLISENSE_DIRECTIVES
#pragma once
#include "gen/etoktype.cpp"
#include "interface.upfront.cpp"
#include "lexer.cpp
#endif
namespace parser {
constexpr bool dont_skip_formatting = false;
struct StackNode
{
StackNode* Prev;
Token Start;
Token Name; // The name of the AST node (if parsed)
StrC ProcName; // The name of the procedure
};
struct ParseContext
{
TokArray Tokens;
StackNode* Scope;
void push( StackNode* node )
{
node->Prev = Scope;
Scope = node;
#if 0 && Build_Debug
log_fmt("\tEntering Context: %.*s\n", Scope->ProcName.Len, Scope->ProcName.Ptr );
#endif
}
void pop()
{
#if 0 && Build_Debug
log_fmt("\tPopping Context: %.*s\n", Scope->ProcName.Len, Scope->ProcName.Ptr );
#endif
Scope = Scope->Prev;
}
String to_string()
{
String result = String::make_reserve( GlobalAllocator, kilobytes(4) );
Token scope_start = Scope->Start;
Token last_valid = Tokens.Idx >= Tokens.Arr.num() ? Tokens.Arr[Tokens.Arr.num() -1] : Tokens.current();
sptr length = scope_start.Length;
char const* current = scope_start.Text + length;
while ( current <= Tokens.Arr.back().Text && *current != '\n' && length < 74 )
{
current++;
length++;
}
String line = String::make( GlobalAllocator, { length, scope_start.Text } );
result.append_fmt("\tScope : %s\n", line );
line.free();
sptr dist = (sptr)last_valid.Text - (sptr)scope_start.Text + 2;
sptr length_from_err = dist;
String line_from_err = String::make( GlobalAllocator, { length_from_err, last_valid.Text } );
if ( length_from_err < 100 )
result.append_fmt("\t(%d, %d):%*c\n", last_valid.Line, last_valid.Column, length_from_err, '^' );
else
result.append_fmt("\t(%d, %d)\n", last_valid.Line, last_valid.Column );
StackNode* curr_scope = Scope;
s32 level = 0;
do
{
if ( curr_scope->Name )
{
result.append_fmt("\t%d: %s, AST Name: %.*s\n", level, curr_scope->ProcName.Ptr, curr_scope->Name.Length, curr_scope->Name.Text );
}
else
{
result.append_fmt("\t%d: %s\n", level, curr_scope->ProcName.Ptr );
}
curr_scope = curr_scope->Prev;
level++;
}
while ( curr_scope );
return result;
}
};
global ParseContext Context;
bool TokArray::__eat( TokType type )
{
if ( Arr.num() - Idx <= 0 )
{
log_failure( "No tokens left.\n%s", Context.to_string() );
return false;
}
if ( ( Arr[ Idx ].Type == TokType::NewLine && type != TokType::NewLine )
|| ( Arr[ Idx ].Type == TokType::Comment && type != TokType::Comment ) )
{
Idx++;
}
if ( Arr[Idx].Type != type )
{
log_failure( "Parse Error, TokArray::eat, Expected: ' %s ' not ' %.*s ' (%d, %d)`\n%s"
, ETokType::to_str(type).Ptr
, Arr[Idx].Length, Arr[Idx].Text
, current().Line
, current().Column
, Context.to_string()
);
return false;
}
#if 0 && Build_Debug
log_fmt("Ate: %S\n", Arr[Idx].to_string() );
#endif
Idx++;
return true;
}
internal
void init()
{
Tokens = Array<Token>::init_reserve( LexArena
, ( LexAllocator_Size - sizeof( Array<Token>::Header ) ) / sizeof(Token)
);
defines_map_arena = Arena_64KB::init();
defines = HashTable<StrC>::init( defines_map_arena );
}
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 ( Context.Tokens.Arr.num() - Context.Tokens.Idx )
# define check_noskip( Type_ ) ( left && currtok_noskip.Type == Type_ )
# define check( Type_ ) ( left && currtok.Type == Type_ )
# define push_scope() \
StackNode scope { nullptr, currtok_noskip, NullToken, txt( __func__ ) }; \
Context.push( & scope )
#pragma endregion Helper Macros
// Procedure Forwards ( Entire parser internal parser interface )
internal Code parse_array_decl ();
internal CodeAttributes parse_attributes ();
internal CodeComment parse_comment ();
internal Code parse_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_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 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 ();
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* 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();
content.append( cut_ptr, cut_length );
last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
continue;
}
// Skip over the content of character literals
if ( scanner[0] == '\'' )
{
move_fwd();
while ( tokleft
&& ( scanner[0] != '\''
|| ( *(scanner -1 ) == '\\' )
) )
{
move_fwd();
}
// Skip the closing '
if ( tokleft )
move_fwd();
content.append( cut_ptr, cut_length );
last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
continue;
}
// Block comments
if ( tokleft > 1 && scanner[0] == '/' && scanner[1] == '*' )
{
while ( tokleft > 1 && !(scanner[0] == '*' && scanner[1] == '/') )
move_fwd();
scanner += 2;
tokleft -= 2;
content.append( cut_ptr, cut_length );
last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
continue;
}
// Line comments
if ( tokleft > 1 && scanner[0] == '/' && scanner[1] == '/' )
{
must_keep_newline = true;
scanner += 2;
tokleft -= 2;
while ( tokleft && scanner[ 0 ] != '\n' )
move_fwd();
if (tokleft)
move_fwd();
content.append( cut_ptr, cut_length );
last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
continue;
}
// Tabs
if (scanner[0] == '\t')
{
if (pos > last_cut)
content.append(cut_ptr, cut_length);
if ( content.back() != ' ' )
content.append(' ');
move_fwd();
last_cut = sptr(scanner) - sptr(raw_text.Ptr);
continue;
}
if ( tokleft > 1 && scanner[0] == '\r' && scanner[1] == '\n' )
{
if ( must_keep_newline || preserve_newlines )
{
must_keep_newline = false;
scanner += 2;
tokleft -= 2;
content.append( cut_ptr, cut_length );
last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
continue;
}
if ( pos > last_cut )
content.append( cut_ptr, cut_length );
// Replace with a space
if ( content.back() != ' ' )
content.append( ' ' );
scanner += 2;
tokleft -= 2;
last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
continue;
}
if ( scanner[0] == '\n' )
{
if ( must_keep_newline || preserve_newlines )
{
must_keep_newline = false;
move_fwd();
content.append( cut_ptr, cut_length );
last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
continue;
}
if ( pos > last_cut )
content.append( cut_ptr, cut_length );
// Replace with a space
if ( content.back() != ' ' )
content.append( ' ' );
move_fwd();
last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
continue;
}
// Escaped newlines
if ( scanner[0] == '\\' )
{
content.append( cut_ptr, cut_length );
s32 amount_to_skip = 1;
if ( tokleft > 1 && scanner[1] == '\n' )
{
amount_to_skip = 2;
}
else if ( tokleft > 2 && scanner[1] == '\r' && scanner[2] == '\n' )
{
amount_to_skip = 3;
}
if ( amount_to_skip > 1 && pos == last_cut )
{
scanner += amount_to_skip;
tokleft -= amount_to_skip;
}
else
move_fwd();
last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
continue;
}
// Consectuive spaces
if ( tokleft > 1 && char_is_space( scanner[0] ) && char_is_space( scanner[ 1 ] ) )
{
content.append( cut_ptr, cut_length );
do
{
move_fwd();
}
while ( tokleft && char_is_space( scanner[0] ) );
last_cut = sptr( scanner ) - sptr( raw_text.Ptr );
// Preserve only 1 space of formattting
if ( content.back() != ' ' )
content.append( ' ' );
continue;
}
move_fwd();
}
if ( last_cut < raw_text.Len )
{
content.append( cut_ptr, raw_text.Len - last_cut );
}
#undef cut_ptr
#undef cut_length
#undef pos
#undef move_fwd
return content;
}
internal
Code parse_array_decl()
{
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 = NullToken;
s32 len = 0;
if ( check(TokType::Attribute_Open) )
{
eat( TokType::Attribute_Open);
// [[
start = currtok;
while ( left && currtok.Type != TokType::Attribute_Close )
{
eat( currtok.Type );
}
// [[ <Content>
eat( TokType::Attribute_Close );
// [[ <Content> ]]
s32 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__((
start = currtok;
while ( left && currtok.Type != TokType::Capture_End )
{
eat(currtok.Type);
}
// __attribute__(( <Content>
eat(TokType::Capture_End);
eat(TokType::Capture_End);
// __attribute__(( <Content> ))
s32 len = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)start.Text;
}
else if ( check(TokType::Decl_MSVC_Attribute) )
{
eat( TokType::Decl_MSVC_Attribute );
eat( TokType::Capture_Start);
// __declspec(
start = currtok;
while ( left && currtok.Type != TokType::Capture_End )
{
eat(currtok.Type);
}
// __declspec( <Content>
eat(TokType::Capture_End);
// __declspec( <Content> )
s32 len = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)start.Text;
}
else if ( currtok.is_attribute() )
{
eat(currtok.Type);
s32 len = start.Length;
// <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 );
}
eat( which );
attributes = parse_attributes();
if ( check( TokType::Identifier ) )
{
name = parse_identifier();
Context.Scope->Name = name;
}
local_persist
char interface_arr_mem[ kilobytes(4) ] {0};
Array<CodeType> interfaces = Array<CodeType>::init_reserve( Arena::init_from_memory(interface_arr_mem, kilobytes(4) ), 4 );
if ( check( TokType::Assign_Classifer ) )
{
eat( TokType::Assign_Classifer );
if ( currtok.is_access_specifier() )
{
access = currtok.to_access_specifier();
}
Token parent_tok = parse_identifier();
parent = def_type( parent_tok );
while ( check(TokType::Comma) )
{
eat(TokType::Access_Public);
if ( currtok.is_access_specifier() )
{
eat(currtok.Type);
}
Token interface_tok = parse_identifier();
interfaces.append( def_type( interface_tok ) );
}
}
if ( check( TokType::BraceCurly_Open ) )
{
body = parse_class_struct_body( which, name );
}
CodeComment inline_cmt = NoCode;
if ( ! inplace_def )
{
Token stmt_end = currtok;
eat( TokType::Statement_End );
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
inline_cmt = parse_comment();
}
if ( which == TokType::Decl_Class )
result = def_class( name, body, parent, access, attributes, mflags );
else
result = def_struct( name, body, (CodeType)parent, access, attributes, mflags );
if ( inline_cmt )
result->InlineCmt = inline_cmt;
interfaces.free();
return result;
}
internal 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::NewLine:
member = fmt_newline;
eat( TokType::NewLine );
break;
case TokType::Comment:
member = parse_comment();
break;
case TokType::Access_Public:
member = access_public;
eat( TokType::Access_Public );
eat( TokType::Assign_Classifer );
break;
case TokType::Access_Protected:
member = access_protected;
eat( TokType::Access_Protected );
eat( TokType::Assign_Classifer );
break;
case TokType::Access_Private:
member = access_private;
eat( TokType::Access_Private );
eat( TokType::Assign_Classifer );
break;
case TokType::Decl_Class:
member = parse_complicated_definition( TokType::Decl_Class );
break;
case TokType::Decl_Enum:
member = parse_complicated_definition( TokType::Decl_Enum );
break;
case TokType::Decl_Friend:
member = parse_friend();
break;
case TokType::Decl_Operator:
member = parse_operator_cast();
break;
case TokType::Decl_Struct:
member = parse_complicated_definition( TokType::Decl_Struct );
break;
case TokType::Decl_Template:
member = parse_template();
break;
case TokType::Decl_Typedef:
member = parse_typedef();
break;
case TokType::Decl_Union:
member = parse_complicated_definition( TokType::Decl_Union );
break;
case TokType::Decl_Using:
member = parse_using();
break;
case TokType::Operator:
if ( currtok.Text[0] != '~' )
{
log_failure( "Operator token found in global body but not destructor unary negation\n%s", Context.to_string() );
return CodeInvalid;
}
member = parse_destructor();
break;
case TokType::Preprocess_Define:
member = parse_define();
break;
case TokType::Preprocess_Include:
member = parse_include();
break;
case TokType::Preprocess_If:
case TokType::Preprocess_IfDef:
case TokType::Preprocess_IfNotDef:
case TokType::Preprocess_ElIf:
member = parse_preprocess_cond();
break;
case TokType::Preprocess_Macro:
member = parse_simple_preprocess( TokType::Preprocess_Macro );
break;
case TokType::Preprocess_Pragma:
member = parse_pragma();
break;
case TokType::Preprocess_Else:
member = preprocess_else;
eat( TokType::Preprocess_Else );
break;
case TokType::Preprocess_EndIf:
member = preprocess_endif;
eat( TokType::Preprocess_EndIf );
break;
case TokType::Preprocess_Unsupported:
member = parse_simple_preprocess( TokType::Preprocess_Unsupported );
break;
case TokType::StaticAssert:
member = parse_static_assert();
break;
case TokType::Attribute_Open:
case TokType::Decl_GNU_Attribute:
case TokType::Decl_MSVC_Attribute:
#define Entry( attribute, str ) case TokType::attribute:
GEN_DEFINE_ATTRIBUTE_TOKENS
#undef Entry
{
attributes = parse_attributes();
}
//! Fallthrough intended
case TokType::Spec_Consteval:
case TokType::Spec_Constexpr:
case TokType::Spec_Constinit:
case TokType::Spec_ForceInline:
case TokType::Spec_Inline:
case TokType::Spec_Mutable:
case TokType::Spec_NeverInline:
case TokType::Spec_Static:
case TokType::Spec_Volatile:
{
SpecifierT specs_found[16] { ESpecifier::NumSpecifiers };
s32 NumSpecifiers = 0;
while ( left && currtok.is_specifier() )
{
SpecifierT spec = ESpecifier::to_type( currtok );
switch ( spec )
{
case ESpecifier::Constexpr:
case ESpecifier::Constinit:
case ESpecifier::Inline:
case ESpecifier::ForceInline:
case ESpecifier::Mutable:
case ESpecifier::NeverInline:
case ESpecifier::Static:
case ESpecifier::Volatile:
break;
case ESpecifier::Consteval:
expects_function = true;
break;
default:
log_failure( "Invalid specifier %s for variable\n%s", ESpecifier::to_str(spec), Context.to_string() );
Context.pop();
return CodeInvalid;
}
specs_found[NumSpecifiers] = spec;
NumSpecifiers++;
eat( currtok.Type );
}
if ( NumSpecifiers )
{
specifiers = def_specifiers( NumSpecifiers, specs_found );
}
if ( currtok.Type == TokType::Operator && currtok.Text[0] == '~' )
{
member = parse_destructor( specifiers );
break;
}
if ( currtok.Type == TokType::Decl_Operator )
{
member = parse_operator_cast( specifiers );
break;
}
}
//! Fallthrough intentional
case TokType::Identifier:
case TokType::Spec_Const:
case TokType::Type_Unsigned:
case TokType::Type_Signed:
case TokType::Type_Short:
case TokType::Type_Long:
case TokType::Type_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();
break;
}
}
member = parse_operator_function_or_variable( expects_function, attributes, specifiers );
}
break;
default:
Token untyped_tok = currtok;
while ( left && currtok.Type != TokType::BraceCurly_Close )
{
untyped_tok.Length = ( (sptr)currtok.Text + currtok.Length ) - (sptr)untyped_tok.Text;
eat( currtok.Type );
}
member = untyped_str( untyped_tok );
break;
}
if ( member == Code::Invalid )
{
log_failure( "Failed to parse member\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
result.append( member );
}
eat( TokType::BraceCurly_Close );
Context.pop();
return result;
}
internal
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 < tokens.Arr.num(); idx ++ )
{
if ( tokens[idx].Type == TokType::BraceCurly_Open )
level++;
if ( tokens[idx].Type == TokType::BraceCurly_Close )
level--;
if ( level == 0 && tokens[idx].Type == TokType::Statement_End )
break;
}
if ( (idx - 2 ) == tokens.Idx )
{
// Its a forward declaration only
Code result = parse_forward_or_definition( which, is_inplace );
Context.pop();
return result;
}
Token tok = tokens[ idx - 1 ];
if ( tok.Type == TokType::Identifier )
{
tok = tokens[ idx - 2 ];
bool is_indirection = tok.Type == TokType::Ampersand
|| tok.Type == TokType::Star;
bool ok_to_parse = false;
if ( tok.Type == TokType::BraceCurly_Close )
{
// Its an inplace definition
// <which> <type_identifier> { ... } <identifier>;
ok_to_parse = true;
is_inplace = true;
}
else if ( tok.Type == TokType::Identifier && tokens[ idx - 3 ].Type == TokType::Decl_Struct )
{
// Its a variable with type ID using struct namespace.
// <which> <type_identifier> <identifier>;
ok_to_parse = true;
}
else if ( is_indirection )
{
// Its a indirection type with type ID using struct namespace.
// <which> <type_identifier>* <identifier>;
ok_to_parse = true;
}
if ( ! ok_to_parse )
{
log_failure( "Unsupported or bad member definition after struct declaration\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
Code result = parse_operator_function_or_variable( false, { nullptr }, { nullptr } );
Context.pop();
return result;
}
else if ( tok.Type == TokType::BraceCurly_Close )
{
// Its a definition
// <which> { ... };
Code result = parse_forward_or_definition( which, is_inplace );
Context.pop();
return result;
}
else if ( tok.Type == TokType::BraceSquare_Close)
{
// Its an array definition
// <which> <type_identifier> <identifier> [ ... ];
Code result = parse_operator_function_or_variable( false, { nullptr }, { nullptr } );
Context.pop();
return result;
}
else
{
log_failure( "Unsupported or bad member definition after struct declaration\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
}
internal inline
CodeDefine parse_define()
{
push_scope();
eat( TokType::Preprocess_Define );
CodeDefine
define = (CodeDefine) make_code();
define->Type = ECode::Preprocess_Define;
if ( ! check( TokType::Identifier ) )
{
log_failure( "Error, expected identifier after #define\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
Context.Scope->Name = currtok;
define->Name = get_cached_string( currtok );
eat( TokType::Identifier );
if ( ! check( TokType::Preprocess_Content ))
{
log_failure( "Error, expected content after #define %s\n%s", define->Name, Context.to_string() );
Context.pop();
return CodeInvalid;
}
if ( currtok.Length == 0 )
{
define->Content = get_cached_string( currtok );
eat( TokType::Preprocess_Content );
Context.pop();
return define;
}
define->Content = get_cached_string( strip_formatting( currtok, strip_formatting_dont_preserve_newlines ) );
eat( TokType::Preprocess_Content );
Context.pop();
return define;
}
internal inline
Code parse_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;
}
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();
// These have to be kept separate from the return type's specifiers.
while ( left && currtok.is_specifier() )
{
if ( specifiers.ast == nullptr )
{
specifiers = def_specifier( ESpecifier::to_type(currtok) );
eat( currtok.Type );
continue;
}
specifiers.append( ESpecifier::to_type(currtok) );
eat( currtok.Type );
}
CodeBody body = NoCode;
CodeComment inline_cmt = NoCode;
if ( check( TokType::BraceCurly_Open ) )
{
body = parse_function_body();
if ( body == Code::Invalid )
{
Context.pop();
return CodeInvalid;
}
}
else
{
Token stmt_end = currtok;
eat( TokType::Statement_End );
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
inline_cmt = parse_comment();
}
using namespace ECode;
String
name_stripped = String::make( GlobalAllocator, name );
name_stripped.strip_space();
CodeFn
result = (CodeFn) make_code();
result->Name = get_cached_string( name_stripped );
result->ModuleFlags = mflags;
if ( body )
{
switch ( body->Type )
{
case Function_Body:
case Untyped:
break;
default:
{
log_failure("Body must be either of Function_Body or Untyped type, %s\n%s", body.debug_str(), Context.to_string());
Context.pop();
return CodeInvalid;
}
}
result->Type = Function;
result->Body = body;
}
else
{
result->Type = Function_Fwd;
}
if ( specifiers )
result->Specs = specifiers;
result->ReturnType = ret_type;
if ( params )
result->Params = params;
if ( inline_cmt )
result->InlineCmt = inline_cmt;
Context.pop();
return result;
}
internal
Code parse_function_body()
{
using namespace ECode;
push_scope();
eat( TokType::BraceCurly_Open );
CodeBody
result = (CodeBody) make_code();
result->Type = Function_Body;
// TODO : Support actual parsing of function body
Token start = currtok;
s32 level = 0;
while ( left && ( currtok.Type != TokType::BraceCurly_Close || level > 0 ) )
{
if ( currtok.Type == TokType::BraceCurly_Open )
level++;
else if ( currtok.Type == TokType::BraceCurly_Close && level > 0 )
level--;
eat( currtok.Type );
}
Token previous = prevtok;
s32 len = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)start.Text;
if ( len > 0 )
{
result.append( def_execution( { len, start.Text } ) );
}
eat( TokType::BraceCurly_Close );
Context.pop();
return result;
}
internal neverinline
CodeBody parse_global_nspace( CodeT which )
{
using namespace ECode;
if ( which != Namespace_Body && which != Global_Body && which != Export_Body && which != Extern_Linkage_Body )
return CodeInvalid;
if ( which != Global_Body )
eat( TokType::BraceCurly_Open );
CodeBody
result = (CodeBody) make_code();
result->Type = which;
while ( left && currtok_noskip.Type != TokType::BraceCurly_Close )
{
Code member = Code::Invalid;
CodeAttributes attributes = { nullptr };
CodeSpecifiers specifiers = { nullptr };
bool expects_function = false;
Context.Scope->Start = currtok_noskip;
if ( currtok_noskip.Type == TokType::Preprocess_Hash )
eat( TokType::Preprocess_Hash );
switch ( currtok_noskip.Type )
{
case TokType::NewLine:
// Empty lines are auto skipped by Tokens.current()
member = fmt_newline;
eat( TokType::NewLine );
break;
case TokType::Comment:
member = parse_comment();
break;
case TokType::Decl_Class:
member = parse_complicated_definition( TokType::Decl_Class );
break;
case TokType::Decl_Enum:
member = parse_complicated_definition( TokType::Decl_Enum );
break;
case TokType::Decl_Extern_Linkage:
if ( which == Extern_Linkage_Body )
log_failure( "Nested extern linkage\n%s", Context.to_string() );
member = parse_extern_link();
break;
case TokType::Decl_Namespace:
member = parse_namespace();
break;
case TokType::Decl_Struct:
member = parse_complicated_definition( TokType::Decl_Struct );
break;
case TokType::Decl_Template:
member = parse_template();
break;
case TokType::Decl_Typedef:
member = parse_typedef();
break;
case TokType::Decl_Union:
member = parse_complicated_definition( TokType::Decl_Union );
break;
case TokType::Decl_Using:
member = parse_using();
break;
case TokType::Preprocess_Define:
member = parse_define();
break;
case TokType::Preprocess_Include:
member = parse_include();
break;
case TokType::Preprocess_If:
case TokType::Preprocess_IfDef:
case TokType::Preprocess_IfNotDef:
case TokType::Preprocess_ElIf:
member = parse_preprocess_cond();
break;
case TokType::Preprocess_Macro:
member = parse_simple_preprocess( TokType::Preprocess_Macro );
break;
case TokType::Preprocess_Pragma:
member = parse_pragma();
break;
case TokType::Preprocess_Else:
member = preprocess_else;
eat( TokType::Preprocess_Else );
break;
case TokType::Preprocess_EndIf:
member = preprocess_endif;
eat( TokType::Preprocess_EndIf );
break;
case TokType::Preprocess_Unsupported:
member = parse_simple_preprocess( TokType::Preprocess_Unsupported );
break;
case TokType::StaticAssert:
member = parse_static_assert();
break;
case TokType::Module_Export:
if ( which == Export_Body )
log_failure( "Nested export declaration\n%s", Context.to_string() );
member = parse_export_body();
break;
case TokType::Module_Import:
{
not_implemented( context );
}
//! Fallthrough intentional
case TokType::Decl_GNU_Attribute:
case TokType::Decl_MSVC_Attribute:
#define Entry( attribute, str ) case TokType::attribute:
GEN_DEFINE_ATTRIBUTE_TOKENS
#undef Entry
{
attributes = parse_attributes();
}
//! Fallthrough intentional
case TokType::Spec_Consteval:
case TokType::Spec_Constexpr:
case TokType::Spec_Constinit:
case TokType::Spec_Extern:
case TokType::Spec_ForceInline:
case TokType::Spec_Global:
case TokType::Spec_Inline:
case TokType::Spec_Internal_Linkage:
case TokType::Spec_NeverInline:
case TokType::Spec_Static:
{
SpecifierT specs_found[16] { ESpecifier::NumSpecifiers };
s32 NumSpecifiers = 0;
while ( left && currtok.is_specifier() )
{
SpecifierT spec = ESpecifier::to_type( currtok );
bool ignore_spec = false;
switch ( spec )
{
case ESpecifier::Constexpr:
case ESpecifier::Constinit:
case ESpecifier::ForceInline:
case ESpecifier::Global:
case ESpecifier::External_Linkage:
case ESpecifier::Internal_Linkage:
case ESpecifier::Inline:
case ESpecifier::Mutable:
case ESpecifier::NeverInline:
case ESpecifier::Static:
case ESpecifier::Volatile:
break;
case ESpecifier::Consteval:
expects_function = true;
break;
case ESpecifier::Const:
ignore_spec = true;
break;
default:
StrC spec_str = ESpecifier::to_str(spec);
log_failure( "Invalid specifier %.*s for variable\n%s", spec_str.Len, spec_str, Context.to_string() );
return CodeInvalid;
}
if (ignore_spec)
break;
specs_found[NumSpecifiers] = spec;
NumSpecifiers++;
eat( currtok.Type );
}
if ( NumSpecifiers )
{
specifiers = def_specifiers( NumSpecifiers, specs_found );
}
}
//! Fallthrough intentional
case TokType::Identifier:
case TokType::Spec_Const:
case TokType::Type_Long:
case TokType::Type_Short:
case TokType::Type_Signed:
case TokType::Type_Unsigned:
case TokType::Type_bool:
case TokType::Type_char:
case TokType::Type_double:
case TokType::Type_int:
{
bool found_operator_cast = false;
s32 idx = Context.Tokens.Idx;
for ( ; idx < Context.Tokens.Arr.num(); idx++ )
{
Token tok = Context.Tokens[ idx ];
if ( tok.Type == TokType::Identifier )
{
idx++;
tok = Context.Tokens[ idx ];
if ( tok.Type == TokType::Access_StaticSymbol )
continue;
break;
}
if ( tok.Type == TokType::Decl_Operator )
found_operator_cast = true;
break;
}
if ( found_operator_cast )
{
member = parse_operator_cast();
break;
}
member = parse_operator_function_or_variable( expects_function, attributes, specifiers );
}
}
if ( member == Code::Invalid )
{
log_failure( "Failed to parse member\n%s", Context.to_string() );
return CodeInvalid;
}
// log_fmt("Global Body Member: %s", member->debug_str());
result.append( member );
}
if ( which != Global_Body )
eat( TokType::BraceCurly_Close );
return result;
}
// 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 );
parse_template_args( name );
while ( check( TokType::Access_StaticSymbol ) )
{
eat( TokType::Access_StaticSymbol );
if ( left == 0 )
{
log_failure( "Error, unexpected end of static symbol identifier\n%s", Context.to_string() );
Context.pop();
return { nullptr, 0, TokType::Invalid };
}
if ( currtok.Type == TokType::Operator && currtok.Text[0] == '*' && currtok.Length == 1 )
{
if ( possible_member_function )
*possible_member_function = true;
else
{
log_failure( "Found a member function pointer identifier but the parsing context did not expect it\n%s", Context.to_string() );
Context.pop();
return { nullptr, 0, TokType::Invalid };
}
}
if ( currtok.Type != TokType::Identifier )
{
log_failure( "Error, expected static symbol identifier, not %s\n%s", ETokType::to_str( currtok.Type ), Context.to_string() );
Context.pop();
return { nullptr, 0, TokType::Invalid };
}
name.Length = ( (sptr)currtok.Text + currtok.Length ) - (sptr)name.Text;
eat( TokType::Identifier );
parse_template_args( name );
}
Context.pop();
return name;
}
internal
CodeInclude parse_include()
{
push_scope();
CodeInclude
include = (CodeInclude) make_code();
include->Type = ECode::Preprocess_Include;
eat( TokType::Preprocess_Include );
if ( ! check( TokType::String ))
{
log_failure( "Error, expected include string after #include\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
Context.Scope->Name = currtok;
include->Content = get_cached_string( currtok );
eat( TokType::String );
Context.pop();
return include;
}
internal
CodeOperator parse_operator_after_ret_type(
ModuleFlag mflags
, CodeAttributes attributes
, CodeSpecifiers specifiers
, CodeType ret_type
)
{
using namespace EOperator;
push_scope();
Token nspace = NullToken;
if ( check( TokType::Identifier ) )
{
nspace = currtok;
while ( left && currtok.Type == TokType::Identifier )
{
eat( TokType::Identifier );
if ( currtok.Type == TokType::Access_StaticSymbol )
eat( TokType::Access_StaticSymbol );
}
nspace.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)nspace.Text;
}
eat( TokType::Decl_Operator );
if ( ! left && currtok.Type != TokType::Operator
&& currtok.Type != TokType::Star
&& currtok.Type != TokType::Ampersand
&& currtok.Type != TokType::Ampersand_DBL )
{
log_failure( "Expected operator after 'operator' keyword\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
Context.Scope->Name = currtok;
OperatorT op = Invalid;
switch ( currtok.Text[0] )
{
case '+':
{
if ( currtok.Text[1] == '=' )
op = Assign_Add;
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:
{
break;
}
}
if ( op == Invalid )
{
log_failure( "Invalid operator '%s'\n%s", currtok.Text, Context.to_string() );
Context.pop();
return CodeInvalid;
}
eat( currtok.Type );
// Parse Params
CodeParam params = parse_params();
if ( params.ast == nullptr && op == EOperator::Multiply )
op = MemberOfPointer;
while ( left && currtok.is_specifier() )
{
if ( specifiers.ast == nullptr )
{
specifiers = def_specifier( ESpecifier::to_type(currtok) );
eat( currtok.Type );
continue;
}
specifiers.append( ESpecifier::to_type(currtok) );
eat( currtok.Type );
}
// Parse Body
CodeBody body = { nullptr };
CodeComment inline_cmt = NoCode;
if ( check( TokType::BraceCurly_Open ) )
{
body = parse_function_body();
if ( body == Code::Invalid )
{
Context.pop();
return CodeInvalid;
}
}
else
{
Token stmt_end = currtok;
eat( TokType::Statement_End );
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
inline_cmt = parse_comment();
}
// OpValidateResult check_result = operator__validate( op, params, ret_type, specifiers );
CodeOperator result = def_operator( op, nspace, params, ret_type, body, specifiers, attributes, mflags );
if ( inline_cmt )
result->InlineCmt = inline_cmt;
Context.pop();
return result;
}
internal
Code parse_operator_function_or_variable( bool expects_function, CodeAttributes attributes, CodeSpecifiers specifiers )
{
push_scope();
Code result = CodeInvalid;
#ifndef GEN_PARSER_DISABLE_MACRO_FUNCTION_SIGNATURES
if ( currtok.Type == TokType::Preprocess_Macro )
{
// Were dealing with a macro after attributes/specifiers.
result = parse_simple_preprocess( TokType::Preprocess_Macro );
Context.pop();
return result;
}
#endif
CodeType type = parse_type();
if ( type == CodeInvalid )
{
Context.pop();
return CodeInvalid;
}
bool found_operator = false;
s32 idx = Context.Tokens.Idx;
for ( ; idx < Context.Tokens.Arr.num(); idx++ )
{
Token tok = Context.Tokens[ idx ];
if ( tok.Type == TokType::Identifier )
{
idx++;
tok = Context.Tokens[ idx ];
if ( tok.Type == TokType::Access_StaticSymbol )
continue;
break;
}
if ( tok.Type == TokType::Decl_Operator )
found_operator = true;
break;
}
if ( found_operator )
{
// Dealing with an operator overload
result = parse_operator_after_ret_type( ModuleFlag::None, attributes, specifiers, type );
}
else
{
Token name = parse_identifier();
Context.Scope->Name = name;
if ( check( TokType::Capture_Start) )
{
// Dealing with a function
result = parse_function_after_name( ModuleFlag::None, attributes, specifiers, type, name );
}
else
{
if ( expects_function )
{
log_failure( "Expected function declaration (consteval was used)\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
// Dealing with a variable
result = parse_variable_after_name( ModuleFlag::None, attributes, specifiers, type, name );
}
}
Context.pop();
return result;
}
internal
CodePragma parse_pragma()
{
push_scope();
CodePragma
pragma = (CodePragma) make_code();
pragma->Type = ECode::Preprocess_Pragma;
eat( TokType::Preprocess_Pragma );
if ( ! check( TokType::Preprocess_Content ))
{
log_failure( "Error, expected content after #pragma\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
Context.Scope->Name = currtok;
pragma->Content = get_cached_string( currtok );
eat( TokType::Preprocess_Content );
Context.pop();
return pragma;
}
internal inline
CodeParam parse_params( bool use_template_capture )
{
using namespace 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 };
}
CodeType type = { nullptr };
Code value = { nullptr };
if ( check( TokType::Varadic_Argument) )
{
eat( TokType::Varadic_Argument );
Context.pop();
return param_varadic;
}
type = parse_type();
if ( type == Code::Invalid )
{
Context.pop();
return CodeInvalid;
}
Token name = NullToken;
if ( check( TokType::Identifier ) )
{
name = currtok;
eat( TokType::Identifier );
if ( bitfield_is_equal( u32, currtok.Flags, TF_Assign ) )
{
eat( TokType::Operator );
Token value_tok = currtok;
if ( currtok.Type == TokType::Comma )
{
log_failure( "Expected value after assignment operator\n%s.", Context.to_string() );
Context.pop();
return CodeInvalid;
}
while ( left
&& currtok.Type != TokType::Comma
&& currtok.Type != TokType::Capture_End
)
{
value_tok.Length = ( (sptr)currtok.Text + currtok.Length ) - (sptr)value_tok.Text;
eat( currtok.Type );
}
value = untyped_str( strip_formatting( value_tok, strip_formatting_dont_preserve_newlines ) );
}
}
CodeParam
result = (CodeParam) make_code();
result->Type = Parameters;
if ( name.Length > 0 )
result->Name = get_cached_string( name );
result->ValueType = type;
if ( value )
result->Value = value;
result->NumEntries++;
while ( left
&& use_template_capture ?
currtok.Type != TokType::Operator && currtok.Text[0] != '>'
: currtok.Type != TokType::Capture_End )
{
eat( TokType::Comma );
Code type = { nullptr };
Code value = { nullptr };
if ( check( TokType::Varadic_Argument) )
{
eat( TokType::Varadic_Argument );
result.append( param_varadic );
continue;
}
type = parse_type();
if ( type == Code::Invalid )
{
Context.pop();
return CodeInvalid;
}
name = { nullptr, 0, TokType::Invalid, false };
if ( check( TokType::Identifier ) )
{
name = currtok;
eat( TokType::Identifier );
if ( bitfield_is_equal( u32, currtok.Flags, TF_Assign ) )
{
eat( TokType::Operator );
Token value_tok = currtok;
if ( currtok.Type == TokType::Comma )
{
log_failure( "Expected value after assignment operator\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
while ( left
&& currtok.Type != TokType::Comma && currtok.Type != TokType::Capture_End
)
{
value_tok.Length = ( (sptr)currtok.Text + currtok.Length ) - (sptr)value_tok.Text;
eat( currtok.Type );
}
value = untyped_str( strip_formatting( value_tok, strip_formatting_dont_preserve_newlines ) );
}
}
CodeParam
param = (CodeParam) make_code();
param->Type = Parameters;
if ( name.Length > 0 )
param->Name = get_cached_string( name );
param->ValueType = type;
if ( value )
param->Value = value;
result.append( param );
}
if ( ! use_template_capture )
eat( TokType::Capture_End );
else
{
if ( ! check( TokType::Operator) || currtok.Text[0] != '>' )
{
log_failure("Expected '<' after 'template' keyword\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
eat( TokType::Operator );
}
Context.pop();
return result;
# undef context
}
internal
CodePreprocessCond parse_preprocess_cond()
{
push_scope();
if ( ! currtok.is_preprocess_cond() )
{
log_failure( "Error, expected preprocess conditional\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
CodePreprocessCond
cond = (CodePreprocessCond) make_code();
cond->Type = scast(CodeT, currtok.Type - (ETokType::Preprocess_If - ECode::Preprocess_If) );
eat( currtok.Type );
if ( ! check( TokType::Preprocess_Content ))
{
log_failure( "Error, expected content after #define\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
Context.Scope->Name = currtok;
cond->Content = get_cached_string( currtok );
eat( TokType::Preprocess_Content );
Context.pop();
return cond;
}
internal inline
Code parse_simple_preprocess( TokType which )
{
push_scope();
Token tok = currtok;
eat( which );
if ( currtok.Type == TokType::BraceCurly_Open )
{
// Eat the block scope right after the macro. Were assuming the macro defines a function definition's signature
eat( TokType::BraceCurly_Open );
s32 level = 0;
while ( left && ( currtok.Type != TokType::BraceCurly_Close || level > 0 ) )
{
if ( currtok.Type == TokType::BraceCurly_Open )
level++;
else if ( currtok.Type == TokType::BraceCurly_Close && level > 0 )
level--;
eat( currtok.Type );
}
eat( TokType::BraceCurly_Close );
StrC prev_proc = Context.Scope->Prev->ProcName;
if ( str_compare( prev_proc.Ptr, "parse_typedef", prev_proc.Len ) != 0 )
{
if ( check( TokType::Statement_End ))
{
Token stmt_end = currtok;
eat( TokType::Statement_End );
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
eat( TokType::Comment );
}
}
tok.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)tok.Text;
}
else
{
if ( str_compare( Context.Scope->Prev->ProcName.Ptr, "parse_typedef", Context.Scope->Prev->ProcName.Len ) != 0 )
{
if ( check( TokType::Statement_End ))
{
Token stmt_end = currtok;
eat( TokType::Statement_End );
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
eat( TokType::Comment );
}
}
tok.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)tok.Text;
}
char const* content = str_fmt_buf( "%.*s ", tok.Length, tok.Text );
Code result = untyped_str( to_str( content ) );
Context.Scope->Name = tok;
Context.pop();
return result;
}
internal
Code parse_static_assert()
{
push_scope();
Code
assert = make_code();
assert->Type = ECode::Untyped;
Token content = currtok;
Context.Scope->Name = content;
eat( TokType::StaticAssert );
eat( TokType::Capture_Start );
s32 level = 0;
while ( left && ( currtok.Type != TokType::Capture_End || level > 0 ) )
{
if ( currtok.Type == TokType::Capture_Start )
level++;
else if ( currtok.Type == TokType::Capture_End )
level--;
eat( currtok.Type );
}
eat( TokType::Capture_End );
eat( TokType::Statement_End );
content.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)content.Text;
char const* str = str_fmt_buf( "%.*s\n", content.Length, content.Text );
assert->Content = get_cached_string( { content.Length + 1, str } );
assert->Name = assert->Content;
Context.pop();
return assert;
}
/*
This a brute-froce make all the arguments part of the token provided.
Can have in-place function signatures, regular identifiers, in-place typenames, compile-time expressions, parameter-pack expansion, etc.
This means that validation can only go so far, and so if there is any different in formatting
passed the basic stripping supported it report a soft failure.
*/
internal inline
void parse_template_args( Token& token )
{
if ( currtok.Type == TokType::Operator && currtok.Text[0] == '<' && currtok.Length == 1 )
{
eat( TokType::Operator );
s32 level = 0;
while ( left && ( currtok.Text[0] != '>' || level > 0 ))
{
if ( currtok.Text[0] == '<' )
level++;
if ( currtok.Text[0] == '>' )
level--;
eat( currtok.Type );
}
eat( TokType::Operator );
// Extend length of name to last token
token.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)token.Text;
}
}
// Variable parsing is handled in multiple places because its initial signature is shared with function parsing
internal
CodeVar parse_variable_after_name(
ModuleFlag mflags
, CodeAttributes attributes
, CodeSpecifiers specifiers
, CodeType type
, StrC name
)
{
push_scope();
Code array_expr = parse_array_decl();
Code expr = { nullptr };
Code bitfield_expr = { nullptr };
if ( bitfield_is_equal( u32, currtok.Flags, TF_Assign ) )
{
eat( TokType::Operator );
Token expr_tok = currtok;
if ( currtok.Type == TokType::Statement_End )
{
log_failure( "Expected expression after assignment operator\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
while ( left && currtok.Type != TokType::Statement_End )
{
eat( currtok.Type );
}
expr_tok.Length = ( (sptr)currtok.Text + currtok.Length ) - (sptr)expr_tok.Text - 1;
expr = untyped_str( expr_tok );
}
if ( currtok.Type == TokType::BraceCurly_Open )
{
Token expr_tok = currtok;
eat( TokType::BraceCurly_Open );
s32 level = 0;
while ( left && ( currtok.Type != TokType::BraceCurly_Close || level > 0 ) )
{
if ( currtok.Type == TokType::BraceCurly_Open )
level++;
else if ( currtok.Type == TokType::BraceCurly_Close && level > 0 )
level--;
eat( currtok.Type );
}
eat( TokType::BraceCurly_Close );
expr_tok.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)expr_tok.Text;
expr = untyped_str( expr_tok );
}
if ( currtok.Type == TokType::Assign_Classifer )
{
eat( TokType::Assign_Classifer );
Token expr_tok = currtok;
if ( currtok.Type == TokType::Statement_End )
{
log_failure( "Expected expression after bitfield \n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
while ( left && currtok.Type != TokType::Statement_End )
{
eat( currtok.Type );
}
expr_tok.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)expr_tok.Text;
bitfield_expr = untyped_str( expr_tok );
}
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();
}
// 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 );
// 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();
}
}
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;
}
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;
}
if ( specifiers )
specifiers.append( spec );
else
specifiers = def_specifier( spec );
}
StrC name = currtok;
eat( TokType::Identifier );
CodeVar var = parse_variable_after_name( ModuleFlag::None, NoCode, specifiers, NoCode, 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()
{
push_scope();
Token identifier = parse_identifier();
CodeParam params = parse_params();
Code initializer_list = NoCode;
CodeBody body = NoCode;
CodeComment inline_cmt = NoCode;
if ( check( TokType::Assign_Classifer ) )
{
eat( TokType::Assign_Classifer );
Token initializer_list_tok = NullToken;
s32 level = 0;
while ( left && ( currtok.Type != TokType::BraceCurly_Open || level > 0 ) )
{
if ( currtok.Type == TokType::BraceCurly_Open )
level++;
else if ( currtok.Type == TokType::BraceCurly_Close )
level--;
eat( currtok.Type );
}
initializer_list_tok.Length = ( (sptr)currtok.Text + currtok.Length ) - (sptr)initializer_list_tok.Text;
initializer_list = untyped_str( initializer_list_tok );
body = parse_function_body();
}
else if ( check( TokType::BraceCurly_Open ) )
{
body = parse_function_body();
}
else
{
Token stmt_end = currtok;
eat( TokType::Statement_End );
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
inline_cmt = parse_comment();
}
CodeConstructor result = (CodeConstructor) make_code();
if ( params )
result->Params = params;
if ( initializer_list )
result->InitializerList = initializer_list;
if ( body )
{
result->Body = body;
result->Type = ECode::Constructor;
}
else
result->Type = ECode::Constructor_Fwd;
if ( inline_cmt )
result->InlineCmt = inline_cmt;
Context.pop();
return result;
}
internal
CodeDestructor parse_destructor( CodeSpecifiers specifiers )
{
push_scope();
if ( check( TokType::Spec_Virtual ) )
{
if ( specifiers )
specifiers.append( ESpecifier::Virtual );
else
specifiers = def_specifier( ESpecifier::Virtual );
eat( TokType::Spec_Virtual );
}
if ( left && currtok.Text[0] == '~' )
eat( TokType::Operator );
else
{
log_failure( "Expected destructor '~' token\n%s", Context.to_string() );
return CodeInvalid;
}
Token identifier = parse_identifier();
CodeBody body = { nullptr };
eat( TokType::Capture_Start );
eat( TokType::Capture_End );
if ( check( TokType::Operator ) && currtok.Text[0] == '=' )
{
eat( TokType::Operator );
if ( left && currtok.Text[0] == '0' )
{
eat( TokType::Number );
specifiers.append( ESpecifier::Pure );
}
else
{
log_failure( "Pure specifier expected due to '=' token\n%s", Context.to_string() );
return CodeInvalid;
}
}
CodeComment inline_cmt = NoCode;
if ( check( TokType::BraceCurly_Open ) )
body = parse_function_body();
else
{
Token stmt_end = currtok;
eat( TokType::Statement_End );
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
inline_cmt = parse_comment();
}
CodeDestructor result = (CodeDestructor) make_code();
if ( specifiers )
result->Specs = specifiers;
if ( body )
{
result->Body = body;
result->Type = ECode::Destructor;
}
else
result->Type = ECode::Destructor_Fwd;
if ( inline_cmt )
result->InlineCmt = inline_cmt;
Context.pop();
return result;
}
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 );
if ( currtok.Type == TokType::Decl_Class )
{
eat( TokType::Decl_Class);
is_enum_class = true;
}
attributes = parse_attributes();
if ( check( TokType::Identifier ) )
{
name = currtok;
Context.Scope->Name = currtok;
eat( TokType::Identifier );
}
if ( currtok.Type == TokType::Assign_Classifer )
{
eat( TokType::Assign_Classifer );
type = parse_type();
if ( type == Code::Invalid )
{
log_failure( "Failed to parse enum classifier\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
}
CodeBody body = { nullptr };
if ( currtok.Type == TokType::BraceCurly_Open )
{
body = (CodeBody) make_code();
body->Type = ECode::Enum_Body;
eat( TokType::BraceCurly_Open );
Code member = CodeInvalid;
while ( left && currtok_noskip.Type != TokType::BraceCurly_Close )
{
if ( currtok_noskip.Type == TokType::Preprocess_Hash )
eat( TokType::Preprocess_Hash );
switch ( currtok_noskip.Type )
{
case TokType::NewLine:
member = untyped_str( currtok_noskip );
eat( TokType::NewLine );
break;
case TokType::Comment:
member = parse_comment();
break;
case TokType::Preprocess_Define:
member = parse_define();
break;
case TokType::Preprocess_If:
case TokType::Preprocess_IfDef:
case TokType::Preprocess_IfNotDef:
case TokType::Preprocess_ElIf:
member = parse_preprocess_cond();
break;
case TokType::Preprocess_Else:
member = preprocess_else;
eat( TokType::Preprocess_Else );
break;
case TokType::Preprocess_EndIf:
member = preprocess_endif;
eat( TokType::Preprocess_EndIf );
break;
case TokType::Preprocess_Macro:
member = parse_simple_preprocess( TokType::Preprocess_Macro );
break;
case TokType::Preprocess_Pragma:
member = parse_pragma();
break;
case TokType::Preprocess_Unsupported:
member = parse_simple_preprocess( TokType::Preprocess_Unsupported );
break;
default:
Token entry = currtok;
eat( TokType::Identifier);
if ( currtok.Type == TokType::Operator && currtok.Text[0] == '=' )
{
eat( TokType::Operator );
while ( currtok_noskip.Type != TokType::Comma && currtok_noskip.Type != TokType::BraceCurly_Close )
{
eat( currtok_noskip.Type );
}
}
if ( currtok.Type == TokType::Comma )
{
eat( TokType::Comma );
}
entry.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)entry.Text;
member = untyped_str( entry );
break;
}
if ( member == Code::Invalid )
{
log_failure( "Failed to parse member\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
body.append( member );
}
eat( TokType::BraceCurly_Close );
}
CodeComment inline_cmt = NoCode;
if ( ! inplace_def )
{
Token stmt_end = currtok;
eat( TokType::Statement_End );
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
inline_cmt = parse_comment();
}
using namespace ECode;
CodeEnum
result = (CodeEnum) make_code();
if ( body.ast )
{
result->Type = is_enum_class ? Enum_Class : Enum;
result->Body = body;
}
else
{
result->Type = is_enum_class ? Enum_Class_Fwd : Enum_Fwd;
}
result->Name = get_cached_string( name );
if ( attributes )
result->Attributes = attributes;
if ( type )
result->UnderlyingType = type;
if ( inline_cmt )
result->InlineCmt = inline_cmt;
Context.pop();
return result;
}
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 );
Token name = currtok;
eat( TokType::String );
name.Text += 1;
name.Length -= 1;
CodeExtern
result = (CodeExtern) make_code();
result->Type = ECode::Extern_Linkage;
result->Name = get_cached_string( name );
Code entry = parse_extern_link_body();
if ( entry == Code::Invalid )
{
log_failure( "Failed to parse body\n%s", Context.to_string() );
Context.pop();
return result;
}
result->Body = entry;
Context.pop();
return result;
}
internal
CodeFriend parse_friend()
{
using namespace ECode;
push_scope();
eat( TokType::Decl_Friend );
CodeFn function = { nullptr };
// Type declaration or return type
CodeType type = parse_type();
if ( type == Code::Invalid )
{
Context.pop();
return CodeInvalid;
}
// Funciton declaration
if ( currtok.Type == TokType::Identifier )
{
// Name
Token name = parse_identifier();
Context.Scope->Name = name;
// Parameter list
CodeParam params = parse_params();
function = make_code();
function->Type = Function_Fwd;
function->Name = get_cached_string( name );
function->ReturnType = type;
if ( params )
function->Params = params;
}
Token stmt_end = currtok;
eat( TokType::Statement_End );
CodeComment inline_cmt = NoCode;
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
inline_cmt = parse_comment();
CodeFriend
result = (CodeFriend) make_code();
result->Type = Friend;
if ( function )
result->Declaration = function;
else
result->Declaration = type;
if ( inline_cmt )
result->InlineCmt = inline_cmt;
Context.pop();
return result;
}
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 );
}
attributes = parse_attributes();
while ( left && currtok.is_specifier() )
{
SpecifierT spec = ESpecifier::to_type( currtok );
switch ( spec )
{
case ESpecifier::Const:
case ESpecifier::Consteval:
case ESpecifier::Constexpr:
case ESpecifier::External_Linkage:
case ESpecifier::ForceInline:
case ESpecifier::Inline:
case ESpecifier::NeverInline:
case ESpecifier::Static:
break;
default:
log_failure( "Invalid specifier %s for functon\n%s", ESpecifier::to_str(spec), Context.to_string() );
Context.pop();
return CodeInvalid;
}
if ( spec == ESpecifier::Const )
continue;
specs_found[NumSpecifiers] = spec;
NumSpecifiers++;
eat( currtok.Type );
}
if ( NumSpecifiers )
{
specifiers = def_specifiers( NumSpecifiers, specs_found );
}
CodeType ret_type = parse_type();
if ( ret_type == Code::Invalid )
{
Context.pop();
return CodeInvalid;
}
Token name = parse_identifier();
Context.Scope->Name = name;
if ( ! name )
{
Context.pop();
return CodeInvalid;
}
CodeFn result = parse_function_after_name( mflags, attributes, specifiers, ret_type, name );
Context.pop();
return result;
}
internal
CodeNS parse_namespace()
{
push_scope();
eat( TokType::Decl_Namespace );
Token name = parse_identifier();
Context.Scope->Name = name;
CodeBody body = parse_global_nspace( ECode::Namespace_Body );
if ( body == Code::Invalid )
{
Context.pop();
return CodeInvalid;
}
CodeNS
result = (CodeNS) make_code();
result->Type = ECode::Namespace;
result->Name = get_cached_string( name );
result->Body = body;
Context.pop();
return result;
}
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 );
}
attributes = parse_attributes();
while ( left && currtok.is_specifier() )
{
SpecifierT spec = ESpecifier::to_type( currtok );
switch ( spec )
{
case ESpecifier::Const:
case ESpecifier::Constexpr:
case ESpecifier::ForceInline:
case ESpecifier::Inline:
case ESpecifier::NeverInline:
case ESpecifier::Static:
break;
default:
log_failure( "Invalid specifier " "%s" " for operator\n%s", ESpecifier::to_str(spec), Context.to_string() );
Context.pop();
return CodeInvalid;
}
if ( spec == ESpecifier::Const )
continue;
specs_found[NumSpecifiers] = spec;
NumSpecifiers++;
eat( currtok.Type );
}
if ( NumSpecifiers )
{
specifiers = def_specifiers( NumSpecifiers, specs_found );
}
// Parse Return Type
CodeType ret_type = parse_type();
CodeOperator result = parse_operator_after_ret_type( mflags, attributes, specifiers, ret_type );
Context.pop();
return result;
}
internal
CodeOpCast parse_operator_cast( CodeSpecifiers specifiers )
{
push_scope();
// TODO : Specifiers attributed to the cast
// Operator's namespace if not within same class.
Token name = NullToken;
if ( check( TokType::Identifier ) )
{
name = currtok;
while ( left && currtok.Type == TokType::Identifier )
{
eat( TokType::Identifier );
if ( currtok.Type == TokType::Access_StaticSymbol )
eat( TokType::Access_StaticSymbol );
}
name.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)name.Text;
}
eat( TokType::Decl_Operator );
Code type = parse_type();
Context.Scope->Name = { type->Name.Data, type->Name.length() };
eat( TokType::Capture_Start );
eat( TokType::Capture_End );
if ( check(TokType::Spec_Const))
{
if ( specifiers.ast == nullptr )
specifiers = def_specifier( ESpecifier::Const );
else
specifiers.append( ESpecifier::Const );
eat( TokType::Spec_Const );
}
Code body = NoCode;
CodeComment inline_cmt = NoCode;
if ( check( TokType::BraceCurly_Open) )
{
eat( TokType::BraceCurly_Open );
Token body_str = currtok;
s32 level = 0;
while ( left && ( currtok.Type != TokType::BraceCurly_Close || level > 0 ) )
{
if ( currtok.Type == TokType::BraceCurly_Open )
level++;
else if ( currtok.Type == TokType::BraceCurly_Close )
level--;
eat( currtok.Type );
}
body_str.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)body_str.Text;
eat( TokType::BraceCurly_Close );
body = untyped_str( body_str );
}
else
{
Token stmt_end = currtok;
eat( TokType::Statement_End );
if ( currtok_noskip.Type == TokType::Comment && currtok_noskip.Line == stmt_end.Line )
inline_cmt = parse_comment();
}
CodeOpCast result = (CodeOpCast) make_code();
if ( name )
result->Name = get_cached_string( name );
if (body)
{
result->Type = ECode::Operator_Cast;
result->Body = body;
}
else
{
result->Type = ECode::Operator_Cast_Fwd;
}
if ( specifiers )
result->Specs = specifiers;
result->ValueType = type;
Context.pop();
return result;
}
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 );
}
eat( TokType::Decl_Template );
Code params = parse_params( UseTemplateCapture );
if ( params == Code::Invalid )
{
Context.pop();
return CodeInvalid;
}
Code definition = { nullptr };
while ( left )
{
if ( check( TokType::Decl_Class ) )
{
definition = parse_class();
break;
}
if ( check( TokType::Decl_Struct ) )
{
definition = parse_struct();
break;
}
if ( check( TokType::Decl_Using ))
{
definition = parse_using();
break;
}
// Its either a function or a variable
Token name = { nullptr, 0, TokType::Invalid };
CodeAttributes attributes = { nullptr };
CodeSpecifiers specifiers = { nullptr };
bool expects_function = false;
SpecifierT specs_found[16] { ESpecifier::NumSpecifiers };
s32 NumSpecifiers = 0;
attributes = parse_attributes();
while ( left && currtok.is_specifier() )
{
SpecifierT spec = ESpecifier::to_type( currtok );
switch ( spec )
{
case ESpecifier::Const:
case ESpecifier::Constexpr:
case ESpecifier::Constinit:
case ESpecifier::External_Linkage:
case ESpecifier::Global:
case ESpecifier::Inline:
case ESpecifier::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 )
continue;
specs_found[NumSpecifiers] = spec;
NumSpecifiers++;
eat( currtok.Type );
}
if ( NumSpecifiers )
{
specifiers = def_specifiers( NumSpecifiers, specs_found );
}
definition = parse_operator_function_or_variable( expects_function, attributes, specifiers );
break;
}
CodeTemplate
result = (CodeTemplate) make_code();
result->Type = ECode::Template;
result->Params = params;
result->Declaration = definition;
result->ModuleFlags = mflags;
Context.pop();
return result;
# undef UseTemplateCapture
}
/*
This is a mess, but it works
Parsing typename is arguably one of the worst aspects of C/C++.
This is an effort to parse it without a full blown or half-blown compliant parser.
Recursive function typenames are not supported, if they are used expect it to serailize just fine, but validation with AST::is_equal
will not be possible if two ASTs share the same definiton but the formatting is slightly different:
AST_1->Name: (* A ( int (*) (short a,unsigned b,long c) ) )
AST_2->Name: (* A ( int(*)(short a, unsigned b, long c) ) )
The excess whitespace cannot be stripped however, because there is no semantic awareness within the first capture group.
*/
internal
CodeType parse_type( bool* typedef_is_function )
{
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
// <attributes> ...
CodeAttributes attributes = parse_attributes();
// Prefix specifiers
// <attributes <specifiers> ...
while ( left && currtok.is_specifier() )
{
SpecifierT spec = ESpecifier::to_type( currtok );
if ( spec != ESpecifier::Const )
{
log_failure( "Error, invalid specifier used in type definition: %s\n%s", currtok.Text, Context.to_string() );
Context.pop();
return CodeInvalid;
}
specs_found[NumSpecifiers] = spec;
NumSpecifiers++;
eat( currtok.Type );
}
if ( left == 0 )
{
log_failure( "Error, unexpected end of type definition\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
/* All kinds of nonsense can makeup a type signature, first we check for a in-place definition of a class, enum, or struct
<attributes> <specifiers> <class, enum, struct, union> ...
*/
if ( currtok.Type == TokType::Decl_Class
|| currtok.Type == TokType::Decl_Enum
|| currtok.Type == TokType::Decl_Struct
|| currtok.Type == TokType::Decl_Union )
{
name = currtok;
eat( currtok.Type );
name.Length = ( (sptr)currtok.Text + currtok.Length ) - (sptr)name.Text;
eat( TokType::Identifier );
Context.Scope->Name = name;
}
// 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 );
eat( TokType::Capture_Start );
while ( left && currtok.Type != TokType::Capture_End )
{
if ( currtok.Type == TokType::Capture_Start )
level++;
if ( currtok.Type == TokType::Capture_End )
level--;
eat( currtok.Type );
}
eat( TokType::Capture_End );
name.Length = ( (sptr)currtok.Text + currtok.Length ) - (sptr)name.Text;
Context.Scope->Name = name;
}
#endif
// Check if native type keywords are used, eat them for the signature.
// <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;
}
// The usual Identifier type signature that may have namespace qualifiers
// <attriutes> <specifiers> <identifier> ...
else
{
name = parse_identifier();
Context.Scope->Name = name;
if ( ! name )
{
log_failure( "Error, failed to type signature\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
}
// Suffix specifiers for typename.
while ( left && currtok.is_specifier() )
{
SpecifierT spec = ESpecifier::to_type( currtok );
if ( spec != ESpecifier::Const
&& spec != ESpecifier::Ptr
&& spec != ESpecifier::Ref
&& spec != ESpecifier::RValue )
{
log_failure( "Error, invalid specifier used in type definition: %s\n%s", currtok.Text, Context.to_string() );
Context.pop();
return CodeInvalid;
}
specs_found[NumSpecifiers] = spec;
NumSpecifiers++;
eat( currtok.Type );
}
#ifdef GEN_USE_NEW_TYPENAME_PARSING
if ( NumSpecifiers )
{
specifiers = def_specifiers( NumSpecifiers, specs_found );
NumSpecifiers = 0;
}
#endif
// For function type signatures
CodeType return_type = NoCode;
CodeParam params = NoCode;
#ifdef GEN_USE_NEW_TYPENAME_PARSING
CodeParam params_nested = NoCode;
#endif
bool is_function_typename = false;
Token* last_capture = nullptr;
{
Token* scanner = Context.Tokens.Arr + Context.Tokens.Idx;
// An identifier being within a typename's signature only occurs if were parsing a typename for a typedef.
if ( typedef_is_function && scanner->Type == TokType::Identifier )
{
is_function_typename = true;
++ scanner;
}
is_function_typename = scanner->Type == TokType::Capture_Start;
Token* first_capture = scanner;
if ( is_function_typename )
{
// Go to the end of the signature
while ( scanner->Type != TokType::Statement_End && scanner->Type != TokType::BraceCurly_Open )
++ scanner;
// Go back to the first capture start found
while ( scanner->Type != TokType::Capture_Start )
-- scanner;
last_capture = scanner;
}
bool 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
name = { nullptr, 0, TokType::Invalid };
// The next token can either be a capture for the identifier or it could be the identifier exposed.
if ( ! check( TokType::Capture_Start ) )
{
// Started with an identifier immeidately, which means its of the format: <ReturnType> <identifier> <capture>;
name = parse_identifier();
}
// If the next token is a capture start and is not the last capture, then we're dealing with function typename whoose identifier is within the capture.
else if ( ( Context.Tokens.Arr + Context.Tokens.Idx ) != last_capture )
{
// WIP : Possible alternative without much pain...
// If this were to be parsed properly...
// Eat Capture Start
// Deal with possible binding specifiers (*, &, &&) and modifiers on those bindings (const, volatile)
// Parse specifiers for the typename with an optional identifier,
// we can shove these specific specifiers into a specs, and then leave the suffix ones for a separate member of the AST.
// Parse immeidate capture which would be with parse_params()
// Eat Capture End
#ifdef GEN_USE_NEW_TYPENAME_PARSING
eat( TokType::Capture_Start );
// Binding specifiers
while ( left && currtok.is_specifier() )
{
SpecifierT spec = ESpecifier::to_type( currtok );
if ( spec != ESpecifier::Ptr
&& spec != ESpecifier::Ref
&& spec != ESpecifier::RValue )
{
log_failure( "Error, invalid specifier used in type definition: %s\n%s", currtok.Text, Context.to_string() );
Context.pop();
return CodeInvalid;
}
specs_found[NumSpecifiers] = spec;
NumSpecifiers++;
eat( currtok.Type );
}
if ( NumSpecifiers )
{
specifiers = def_specifiers( NumSpecifiers, specs_found );
}
NumSpecifiers = 0;
if ( check( TokType::Identifier ))
name = parse_identifier();
// Immeidate parameters
if ( check( TokType::Capture_Start ))
params_nested = parse_params();
#else
// Starting immediatley with a capture, most likely declaring a typename for a member function pointer.
// Everything within this capture will just be shoved into the name field including the capture tokens themselves.
name = currtok;
eat( TokType::Capture_Start );
s32 level = 0;
while ( left && ( currtok.Type != TokType::Capture_End || level > 0 ))
{
if ( currtok.Type == TokType::Capture_Start )
level++;
if ( currtok.Type == TokType::Capture_End )
level--;
eat( currtok.Type );
}
eat( TokType::Capture_End );
name.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)name.Text;
#endif
}
// Were now dealing with the parameters of the function
params = parse_params();
// Look for suffix specifiers for the function
while ( left && currtok.is_specifier() )
{
SpecifierT spec = ESpecifier::to_type( currtok );
if ( spec != ESpecifier::Const
// TODO : Add support for NoExcept
// && spec != ESpecifier::NoExcept
&& spec != ESpecifier::RValue )
{
log_failure( "Error, invalid specifier used in type definition: %s\n%s", currtok.Text, Context.to_string() );
Context.pop();
return CodeInvalid;
}
specs_found[NumSpecifiers] = spec;
NumSpecifiers++;
eat( currtok.Type );
}
#ifdef GEN_USE_NEW_TYPENAME_PARSING
if ( NumSpecifiers )
{
func_suffix_specs = def_specifiers( NumSpecifiers, specs_found );
NumSpecifiers = 0;
}
#endif
}
bool is_param_pack = false;
if ( check(TokType::Varadic_Argument) )
{
is_param_pack = true;
eat( TokType::Varadic_Argument );
}
using namespace ECode;
CodeType
result = (CodeType) make_code();
result->Type = Typename;
// result->Token = Context.Scope->Start;
// Need to wait until were using the new parsing method to do this.
String name_stripped = strip_formatting( name, strip_formatting_dont_preserve_newlines );
// name_stripped.strip_space();
#ifdef GEN_USE_NEW_TYPENAME_PARSING
if ( params_nested )
{
name_stripped.append( params_nested->to_string() );
}
#endif
result->Name = get_cached_string( name_stripped );
if ( attributes )
result->Attributes = attributes;
#ifdef GEN_USE_NEW_TYPENAME_PARSING
if ( specifiers )
{
result->Specs = specifiers;
}
if ( func_suffix_specs )
{
result->FuncSuffixSpecs = func_suffix_specs;
}
#else
if (NumSpecifiers)
{
Code specifiers = def_specifiers( NumSpecifiers, (SpecifierT*)specs_found );
result->Specs = specifiers;
}
#endif
if ( is_param_pack )
result->IsParamPack = true;
// These following are only populated if its a function typename
if ( return_type )
{
result->ReturnType = return_type;
if ( typedef_is_function )
*typedef_is_function = true;
}
if ( params )
result->Params = params;
Context.pop();
return result;
}
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 < tokens.Arr.num(); idx ++ )
{
if ( tokens[idx].Type == TokType::BraceCurly_Open )
level++;
if ( tokens[idx].Type == TokType::BraceCurly_Close )
level--;
if ( level == 0 && tokens[idx].Type == TokType::Statement_End )
break;
}
if ( (idx - 2 ) == tokens.Idx )
{
// Its a forward declaration only
type = parse_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
type = parse_type( & 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;
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
}
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