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gencpp/project/components/gen.interface.parsing.cpp

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/*
These constructors are the most implementation intensive other than the editor or scanner.
*/
namespace Parser
{
/*
This is a simple lexer that focuses on tokenizing only tokens relevant to the library.
It will not be capable of lexing C++ code with unsupported features.
For the sake of scanning files, it can scan preprocessor directives
Attributes_Start is only used to indicate the start of the user_defined attribute list.
*/
# define Define_TokType \
Entry( Access_Private, "private" ) \
Entry( Access_Protected, "protected" ) \
Entry( Access_Public, "public" ) \
Entry( Access_MemberSymbol, "." ) \
Entry( Access_StaticSymbol, "::") \
Entry( Ampersand, "&" ) \
Entry( Ampersand_DBL, "&&" ) \
Entry( Assign_Classifer, ":" ) \
Entry( Attribute_Open, "[[" ) \
Entry( Attribute_Close, "]]" ) \
Entry( BraceCurly_Open, "{" ) \
Entry( BraceCurly_Close, "}" ) \
Entry( BraceSquare_Open, "[" ) \
Entry( BraceSquare_Close, "]" ) \
Entry( Capture_Start, "(" ) \
Entry( Capture_End, ")" ) \
Entry( Comment, "__comment__" ) \
Entry( Char, "__char__" ) \
Entry( Comma, "," ) \
Entry( Decl_Class, "class" ) \
Entry( Decl_GNU_Attribute, "__attribute__" ) \
Entry( Decl_MSVC_Attribute, "__declspec" ) \
Entry( Decl_Enum, "enum" ) \
Entry( Decl_Extern_Linkage, "extern" ) \
Entry( Decl_Friend, "friend" ) \
Entry( Decl_Module, "module" ) \
Entry( Decl_Namespace, "namespace" ) \
Entry( Decl_Operator, "operator" ) \
Entry( Decl_Struct, "struct" ) \
Entry( Decl_Template, "template" ) \
Entry( Decl_Typedef, "typedef" ) \
Entry( Decl_Using, "using" ) \
Entry( Decl_Union, "union" ) \
Entry( Identifier, "__identifier__" ) \
Entry( Module_Import, "import" ) \
Entry( Module_Export, "export" ) \
Entry( Number, "number" ) \
Entry( Operator, "operator" ) \
Entry( Preprocessor_Directive, "#") \
Entry( Preprocessor_Include, "include" ) \
Entry( Spec_Alignas, "alignas" ) \
Entry( Spec_Const, "const" ) \
Entry( Spec_Consteval, "consteval" ) \
Entry( Spec_Constexpr, "constexpr" ) \
Entry( Spec_Constinit, "constinit" ) \
Entry( Spec_Explicit, "explicit" ) \
Entry( Spec_Extern, "extern" ) \
Entry( Spec_Final, "final" ) \
Entry( Spec_Global, "global" ) \
Entry( Spec_Inline, "inline" ) \
Entry( Spec_Internal_Linkage, "internal" ) \
Entry( Spec_LocalPersist, "local_persist" ) \
Entry( Spec_Mutable, "mutable" ) \
Entry( Spec_Override, "override" ) \
Entry( Spec_Static, "static" ) \
Entry( Spec_ThreadLocal, "thread_local" ) \
Entry( Spec_Volatile, "volatile") \
Entry( Star, "*" ) \
Entry( Statement_End, ";" ) \
Entry( String, "__string__" ) \
Entry( Type_Unsigned, "unsigned" ) \
Entry( Type_Signed, "signed" ) \
Entry( Type_Short, "short" ) \
Entry( Type_Long, "long" ) \
Entry( Type_char, "char" ) \
Entry( Type_int, "int" ) \
Entry( Type_double, "double" ) \
Entry( Varadic_Argument, "..." ) \
Entry( Attributes_Start, "__attrib_start__" )
enum class TokType : u32
{
# define Entry( Name_, Str_ ) Name_,
Define_TokType
GEN_Define_Attribute_Tokens
# undef Entry
Num,
Invalid
};
struct Token
{
char const* Text;
sptr Length;
TokType Type;
bool IsAssign;
operator bool()
{
return Text && Length && Type != TokType::Invalid;
}
operator StrC()
{
return { Length, Text };
}
};
internal inline
TokType get_tok_type( char const* word, s32 length )
{
local_persist
StrC lookup[(u32)TokType::Num] =
{
# define Entry( Name_, Str_ ) { sizeof(Str_), Str_ },
Define_TokType
GEN_Define_Attribute_Tokens
# undef Entry
};
for ( u32 index = 0; index < (u32)TokType::Num; index++ )
{
s32 lookup_len = lookup[index].Len - 1;
char const* lookup_str = lookup[index].Ptr;
if ( lookup_len != length )
continue;
if ( str_compare( word, lookup_str, lookup_len ) == 0 )
return scast(TokType, index);
}
return TokType::Invalid;
}
internal inline
char const* str_tok_type( TokType type )
{
local_persist
char const* lookup[(u32)TokType::Num] =
{
# define Entry( Name_, Str_ ) Str_,
Define_TokType
GEN_Define_Attribute_Tokens
# undef Entry
};
return lookup[(u32)type];
}
# undef Define_TokType
internal inline
bool tok_is_specifier( Token const& tok )
{
return (tok.Type <= TokType::Star && tok.Type >= TokType::Spec_Alignas)
|| tok.Type == TokType::Ampersand
|| tok.Type == TokType::Ampersand_DBL
;
}
internal inline
bool tok_is_access_specifier( Token const& tok )
{
return tok.Type >= TokType::Access_Private && tok.Type <= TokType::Access_Public;
}
internal inline
AccessSpec tok_to_access_specifier( Token const& tok )
{
return scast(AccessSpec, tok.Type);
}
internal inline
bool tok_is_attribute( Token const& tok )
{
return tok.Type > TokType::Attributes_Start;
}
struct TokArray
{
Array<Token> Arr;
s32 Idx;
bool __eat( TokType type, char const* context )
{
if ( Arr.num() - Idx <= 0 )
{
log_failure( "gen::%s: No tokens left", context );
return Code::Invalid;
}
if ( Arr[Idx].Type != type )
{
String token_str = String::make( GlobalAllocator, { Arr[Idx].Length, Arr[Idx].Text } );
log_failure( "gen::%s: expected %s, got %s", context, str_tok_type(type), str_tok_type(Arr[Idx].Type) );
return Code::Invalid;
}
Idx++;
return true;
}
Token& current()
{
return Arr[Idx];
}
Token& previous()
{
return Arr[Idx - 1];
}
Token* next()
{
return Idx + 1 < Arr.num() ? &Arr[Idx + 1] : nullptr;
}
};
TokArray lex( StrC content, bool keep_preprocess_directives = false )
{
# define current ( * scanner )
# define move_forward() \
left--; \
scanner++
# define SkipWhitespace() \
while ( left && char_is_space( current ) ) \
{ \
move_forward(); \
}
# define SkipWhitespace_Checked( Context_, Msg_, ... ) \
while ( left && char_is_space( current ) ) \
{ \
move_forward(); \
} \
if ( left <= 0 ) \
{ \
log_failure( "gen::" txt(Context_) ": " Msg_, __VA_ARGS__ ); \
return { 0, nullptr }; \
}
local_persist thread_local
Array<Token> Tokens = { nullptr };
s32 left = content.Len;
char const* scanner = content.Ptr;
char const* word = scanner;
s32 word_length = 0;
SkipWhitespace();
if ( left <= 0 )
{
log_failure( "gen::lex: no tokens found (only whitespace provided)" );
return { { nullptr }, 0 };
}
if ( Tokens )
{
Tokens.free();
}
Tokens = Array<Token>::init_reserve( LexArena, content.Len / 6 );
while (left )
{
Token token = { nullptr, 0, TokType::Invalid, false };
SkipWhitespace();
if ( left <= 0 )
break;
switch ( current )
{
case '#':
token.Text = scanner;
token.Length = 1;
token.Type = TokType::Preprocessor_Directive;
move_forward();
while (left && current != '\n' )
{
if ( current == '\\' )
{
move_forward();
if ( current != '\n' && keep_preprocess_directives )
{
log_failure( "gen::lex: invalid preprocessor directive, will still grab but will not compile %s", token.Text );
}
}
move_forward();
token.Length++;
}
goto FoundToken;
case '.':
token.Text = scanner;
token.Length = 1;
token.Type = TokType::Access_MemberSymbol;
if (left)
move_forward();
if ( current == '.' )
{
move_forward();
if( current == '.' )
{
token.Length = 3;
token.Type = TokType::Varadic_Argument;
move_forward();
}
else
{
log_failure( "gen::lex: invalid varadic argument, expected '...' got '..%c'", current );
}
}
goto FoundToken;
case '&' :
token.Text = scanner;
token.Length = 1;
token.Type = TokType::Ampersand;
if (left)
move_forward();
if ( current == '&' ) // &&
{
token.Length = 2;
token.Type = TokType::Ampersand_DBL;
if (left)
move_forward();
}
goto FoundToken;
case ':':
token.Text = scanner;
token.Length = 1;
token.Type = TokType::Assign_Classifer;
if (left)
move_forward();
if ( current == ':' )
{
move_forward();
token.Type = TokType::Access_StaticSymbol;
token.Length++;
}
goto FoundToken;
case '{':
token.Text = scanner;
token.Length = 1;
token.Type = TokType::BraceCurly_Open;
if (left)
move_forward();
goto FoundToken;
case '}':
token.Text = scanner;
token.Length = 1;
token.Type = TokType::BraceCurly_Close;
if (left)
move_forward();
goto FoundToken;
case '[':
token.Text = scanner;
token.Length = 1;
token.Type = TokType::BraceSquare_Open;
if ( left )
{
move_forward();
if ( current == ']' )
{
token.Length = 2;
token.Type = TokType::Operator;
move_forward();
}
}
goto FoundToken;
case ']':
token.Text = scanner;
token.Length = 1;
token.Type = TokType::BraceSquare_Close;
if (left)
move_forward();
goto FoundToken;
case '(':
token.Text = scanner;
token.Length = 1;
token.Type = TokType::Capture_Start;
if (left)
move_forward();
goto FoundToken;
case ')':
token.Text = scanner;
token.Length = 1;
token.Type = TokType::Capture_End;
if (left)
move_forward();
goto FoundToken;
case '\'':
token.Text = scanner;
token.Length = 1;
token.Type = TokType::Char;
move_forward();
while ( left && current != '\'' )
{
move_forward();
token.Length++;
}
if ( left )
{
move_forward();
token.Length++;
}
goto FoundToken;
case ',':
token.Text = scanner;
token.Length = 1;
token.Type = TokType::Comma;
if (left)
move_forward();
goto FoundToken;
case '*':
token.Text = scanner;
token.Length = 1;
token.Type = TokType::Star;
if (left)
move_forward();
goto FoundToken;
case ';':
token.Text = scanner;
token.Length = 1;
token.Type = TokType::Statement_End;
if (left)
move_forward();
goto FoundToken;
case '"':
token.Text = scanner;
token.Length = 1;
token.Type = TokType::String;
move_forward();
while ( left )
{
if ( current == '"' )
{
move_forward();
break;
}
if ( current == '\\' )
{
move_forward();
token.Length++;
if ( left )
{
move_forward();
token.Length++;
}
continue;
}
move_forward();
token.Length++;
}
goto FoundToken;
// All other operators we just label as an operator and move forward.
case '=':
token.Text = scanner;
token.Length = 1;
token.Type = TokType::Operator;
token.IsAssign = true;
if (left)
move_forward();
goto FoundToken;
case '+':
case '%':
case '^':
case '~':
case '!':
case '<':
case '>':
case '|':
token.Text = scanner;
token.Length = 1;
token.Type = TokType::Operator;
if (left)
move_forward();
if ( current == '=' )
{
token.Length++;
token.IsAssign = true;
if (left)
move_forward();
}
else while ( left && current == *(scanner - 1) && token.Length < 3 )
{
token.Length++;
if (left)
move_forward();
}
goto FoundToken;
// Dash is unfortunatlly a bit more complicated...
case '-':
token.Text = scanner;
token.Length = 1;
token.Type = TokType::Operator;
if ( left )
{
move_forward();
if ( current == '>' )
{
token.Length++;
move_forward();
if ( current == '*' )
{
token.Length++;
move_forward();
}
}
else if ( current == '=' )
{
token.Length++;
token.IsAssign = true;
if (left)
move_forward();
}
else while ( left && current == *(scanner - 1) && token.Length < 3 )
{
token.Length++;
if (left)
move_forward();
}
}
goto FoundToken;
case '/':
token.Text = scanner;
token.Length = 1;
token.Type = TokType::Operator;
if ( left )
{
move_forward();
if ( current == '/' )
{
token.Type = TokType::Comment;
move_forward();
token.Text = scanner;
token.Length = 0;
while ( left && current != '\n' )
{
move_forward();
token.Length++;
}
}
else if ( current == '*' )
{
token.Type = TokType::Comment;
move_forward();
token.Text = scanner;
token.Length = 0;
while ( left && ( current != '*' && *(scanner + 1) != '/' ) )
{
move_forward();
token.Length++;
}
move_forward();
move_forward();
}
}
goto FoundToken;
}
if ( char_is_alpha( current ) || current == '_' )
{
token.Text = scanner;
token.Length = 1;
move_forward();
while ( left && ( char_is_alphanumeric(current) || current == '_' ) )
{
move_forward();
token.Length++;
}
goto FoundToken;
}
else if ( char_is_digit(current) )
{
// This is a very brute force lex, no checks are done for validity of literal.
token.Text = scanner;
token.Length = 1;
token.Type = TokType::Number;
move_forward();
if (left
&& ( current == 'x' || current == 'X'
|| current == 'b' || current == 'B'
|| current == 'o' || current == 'O' )
)
{
move_forward();
token.Length++;
while ( left && char_is_hex_digit(current) )
{
move_forward();
token.Length++;
}
goto FoundToken;
}
while ( left && char_is_digit(current) )
{
move_forward();
token.Length++;
}
if ( left && current == '.' )
{
move_forward();
token.Length++;
while ( left && char_is_digit(current) )
{
move_forward();
token.Length++;
}
}
goto FoundToken;
}
else
{
String context_str = String::fmt_buf( GlobalAllocator, "%s", scanner, min( 100, left ) );
log_failure( "Failed to lex token %s", context_str );
// Skip to next whitespace since we can't know if anything else is valid until then.
while ( left && ! char_is_space( current ) )
{
move_forward();
}
}
FoundToken:
if ( token.Type != TokType::Invalid )
{
if ( token.Type == TokType::Preprocessor_Directive && keep_preprocess_directives == false )
continue;
Tokens.append( token );
continue;
}
TokType type = get_tok_type( token.Text, token.Length );
if ( type == TokType::Invalid)
type = TokType::Identifier;
token.Type = type;
Tokens.append( token );
}
if ( Tokens.num() == 0 )
{
log_failure( "Failed to lex any tokens" );
return { { nullptr }, 0 };
}
return { Tokens, 0 };
# undef current
# undef move_forward
# undef SkipWhitespace
# undef SkipWhitespace_Checked
}
}
#pragma region Helper Macros
# define check_parse_args( func, def ) \
if ( def.Len <= 0 ) \
{ \
log_failure( "gen::" stringize(func) ": length must greater than 0" ); \
return CodeInvalid; \
} \
if ( def.Ptr == nullptr ) \
{ \
log_failure( "gen::" stringize(func) ": def was null" ); \
return CodeInvalid; \
}
# define nexttok toks.next()
# define currtok toks.current()
# define prevtok toks.previous()
# define eat( Type_ ) toks.__eat( Type_, context )
# define left ( toks.Arr.num() - toks.Idx )
# define check( Type_ ) ( left && currtok.Type == Type_ )
#pragma endregion Helper Macros
struct ParseContext
{
ParseContext* Parent;
char const* Fn;
};
internal Code parse_function_body( Parser::TokArray& toks, char const* context );
internal Code parse_global_nspace( Parser::TokArray& toks, char const* context );
internal CodeClass parse_class ( Parser::TokArray& toks, char const* context );
internal CodeEnum parse_enum ( Parser::TokArray& toks, char const* context );
internal CodeBody parse_export_body ( Parser::TokArray& toks, char const* context );
internal CodeBody parse_extern_link_body( Parser::TokArray& toks, char const* context );
internal CodeExtern parse_exten_link ( Parser::TokArray& toks, char const* context );
internal CodeFriend parse_friend ( Parser::TokArray& toks, char const* context );
internal CodeFn parse_function ( Parser::TokArray& toks, char const* context );
internal CodeNamespace parse_namespace ( Parser::TokArray& toks, char const* context );
internal CodeOpCast parse_operator_cast ( Parser::TokArray& toks, char const* context );
internal CodeStruct parse_struct ( Parser::TokArray& toks, char const* context );
internal CodeVar parse_variable ( Parser::TokArray& toks, char const* context );
internal CodeTemplate parse_template ( Parser::TokArray& toks, char const* context );
internal CodeType parse_type ( Parser::TokArray& toks, char const* context );
internal CodeTypedef parse_typedef ( Parser::TokArray& toks, char const* context );
internal CodeUnion parse_union ( Parser::TokArray& toks, char const* context );
internal CodeUsing parse_using ( Parser::TokArray& toks, char const* context );
internal inline
Code parse_array_decl( Parser::TokArray& toks, char const* context )
{
using namespace Parser;
if ( check( TokType::BraceSquare_Open ) )
{
eat( TokType::BraceSquare_Open );
if ( left == 0 )
{
log_failure( "%s: Error, unexpected end of typedef definition ( '[]' scope started )", stringize(parse_typedef) );
return Code::Invalid;
}
if ( currtok.Type == TokType::BraceSquare_Close )
{
log_failure( "%s: Error, empty array expression in typedef definition", stringize(parse_typedef) );
return Code::Invalid;
}
Token untyped_tok = currtok;
while ( left && currtok.Type != TokType::BraceSquare_Close )
{
eat( currtok.Type );
}
untyped_tok.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)untyped_tok.Text;
Code array_expr = untyped_str( untyped_tok );
if ( left == 0 )
{
log_failure( "%s: Error, unexpected end of type definition, expected ]", stringize(parse_typedef) );
return Code::Invalid;
}
if ( currtok.Type != TokType::BraceSquare_Close )
{
log_failure( "%s: Error, expected ] in type definition, not %s", stringize(parse_typedef), str_tok_type( currtok.Type ) );
return Code::Invalid;
}
eat( TokType::BraceSquare_Close );
return array_expr;
}
return { nullptr };
}
internal inline
CodeAttributes parse_attributes( Parser::TokArray& toks, char const* context )
{
using namespace Parser;
Token start;
s32 len = 0;
if ( check(TokType::Attribute_Open) )
{
eat( TokType::Attribute_Open);
while ( left && currtok.Type != TokType::Attribute_Close )
{
eat( currtok.Type );
}
eat( TokType::Attribute_Close );
s32 len = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)start.Text;
}
else if ( check(TokType::Decl_GNU_Attribute) )
{
eat(TokType::BraceCurly_Open);
eat(TokType::BraceCurly_Open);
while ( left && currtok.Type != TokType::BraceCurly_Close )
{
eat(currtok.Type);
}
eat(TokType::BraceCurly_Close);
eat(TokType::BraceCurly_Close);
s32 len = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)start.Text;
}
else if ( check(TokType::Decl_MSVC_Attribute) )
{
eat( TokType::Decl_MSVC_Attribute );
eat( TokType::BraceCurly_Open);
while ( left && currtok.Type != TokType::BraceCurly_Close )
{
eat(currtok.Type);
}
eat(TokType::BraceCurly_Close);
s32 len = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)start.Text;
}
else if ( tok_is_attribute( currtok ) )
{
eat(currtok.Type);
s32 len = start.Length;
}
if ( len > 0 )
{
StrC attribute_txt = { len, start.Text };
return def_attributes( attribute_txt );
}
return { nullptr };
}
internal inline
Parser::Token parse_identifier( Parser::TokArray& toks, char const* context )
{
using namespace Parser;
Token name = currtok;
eat( TokType::Identifier );
while ( check( TokType::Access_StaticSymbol ) )
{
eat( TokType::Access_StaticSymbol );
if ( left == 0 )
{
log_failure( "%s: Error, unexpected end of type definition, expected identifier", context );
return { nullptr, 0, TokType::Invalid };
}
if ( currtok.Type != TokType::Identifier )
{
log_failure( "%s: Error, expected identifier in type definition, not %s", context, str_tok_type( currtok.Type ) );
return { nullptr, 0, TokType::Invalid };
}
name.Length = ( (sptr)currtok.Text + currtok.Length ) - (sptr)name.Text;
eat( TokType::Identifier );
}
return name;
}
internal
CodeParam parse_params( Parser::TokArray& toks, char const* context, bool use_template_capture = false )
{
using namespace Parser;
using namespace ECode;
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 );
return { nullptr };
}
CodeType type = { nullptr };
Code value = { nullptr };
if ( check( TokType::Varadic_Argument) )
{
eat( TokType::Varadic_Argument );
return param_varadic;
}
type = parse_type( toks, context );
if ( type == Code::Invalid )
return CodeInvalid;
Token name = { nullptr, 0, TokType::Invalid, false };
if ( check( TokType::Identifier ) )
{
name = currtok;
eat( TokType::Identifier );
if ( currtok.IsAssign )
{
eat( TokType::Operator );
Token value_tok = currtok;
if ( currtok.Type == TokType::Statement_End )
{
log_failure( "gen::%s: Expected value after assignment operator", context );
return CodeInvalid;
}
while ( left && currtok.Type != TokType::Statement_End )
{
value_tok.Length = ( (sptr)currtok.Text + currtok.Length ) - (sptr)value_tok.Text;
eat( currtok.Type );
}
value = parse_type( toks, context );
}
}
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( toks, context );
if ( type == Code::Invalid )
return CodeInvalid;
name = { nullptr, 0, TokType::Invalid, false };
if ( check( TokType::Identifier ) )
{
name = currtok;
eat( TokType::Identifier );
if ( currtok.IsAssign )
{
eat( TokType::Operator );
Token value_tok = currtok;
if ( currtok.Type == TokType::Statement_End )
{
log_failure( "gen::%s: Expected value after assignment operator", context );
return CodeInvalid;
}
while ( left && currtok.Type != TokType::Statement_End )
{
value_tok.Length = ( (sptr)currtok.Text + currtok.Length ) - (sptr)value_tok.Text;
eat( currtok.Type );
}
value = parse_type( toks, context );
}
}
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("gen::parse_template: expected '<' after 'template' keyword. %s", str_tok_type( currtok.Type ));
return CodeInvalid;
}
eat( TokType::Operator );
}
return result;
# undef context
}
// 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
, StrC name
, Parser::TokArray& toks
, char const* context
)
{
using namespace Parser;
CodeParam params = parse_params( toks, stringize(parse_function) );
while ( left && tok_is_specifier( currtok ) )
{
specifiers.append( ESpecifier::to_type(currtok) );
eat( currtok.Type );
}
CodeBody body = { nullptr };
if ( check( TokType::BraceCurly_Open ) )
{
body = parse_function_body( toks, stringize(parse_function) );
if ( body == Code::Invalid )
return CodeInvalid;
}
else
{
eat( TokType::Statement_End );
}
using namespace ECode;
CodeFn
result = (CodeFn) make_code();
result->Name = get_cached_string( name );
result->ModuleFlags = mflags;
if ( body )
{
switch ( body->Type )
{
case Function_Body:
case Untyped:
break;
default:
{
log_failure("gen::def_function: body must be either of Function_Body or Untyped type. %s", body.debug_str());
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;
return result;
}
internal inline
CodeOperator parse_operator_after_ret_type( ModuleFlag mflags
, CodeAttributes attributes
, CodeSpecifiers specifiers
, CodeType ret_type
, Parser::TokArray& toks
, char const* context )
{
using namespace Parser;
using namespace EOperator;
// Parse Operator
eat( TokType::Decl_Operator );
if ( ! check( TokType::Operator ) )
{
log_failure( "gen::%s: Expected operator after 'operator' keyword", context );
return CodeInvalid;
}
OperatorT op = Invalid;
switch ( currtok.Text[0] )
{
case '+':
{
if ( currtok.Text[1] == '=' )
op = Assign_Add;
else
op = Add;
}
break;
case '-':
{
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( "gen::%s: Invalid operator '%s'", context, currtok.Text );
return CodeInvalid;
}
eat( TokType::Operator );
// Parse Params
CodeParam params = parse_params( toks, stringize(parse_operator) );
while ( left && tok_is_specifier( currtok ) )
{
specifiers.append( ESpecifier::to_type(currtok) );
eat( currtok.Type );
}
// Parse Body
CodeBody body = { nullptr };
if ( check( TokType::BraceCurly_Open ) )
{
body = parse_function_body( toks, stringize(parse_function) );
if ( body == Code::Invalid )
return CodeInvalid;
}
else
{
eat( TokType::Statement_End );
}
// OpValidateResult check_result = operator__validate( op, params, ret_type, specifiers );
CodeOperator result = def_operator( op, params, ret_type, body, specifiers, attributes, mflags );
return result;
}
// Variable parsing is handled in multiple places because its initial signature is shared with function parsing
internal inline
CodeVar parse_variable_after_name(
ModuleFlag mflags
, CodeAttributes attributes
,CodeSpecifiers specifiers
, CodeType type
, StrC name
, Parser::TokArray& toks
, char const* context )
{
using namespace Parser;
Code array_expr = parse_array_decl( toks, stringize(parse_variable) );
Code expr = { nullptr };
if ( currtok.IsAssign )
{
eat( TokType::Operator );
Token expr_tok = currtok;
if ( currtok.Type == TokType::Statement_End )
{
log_failure( "gen::parse_variable: expected expression after assignment operator" );
return CodeInvalid;
}
while ( left && currtok.Type != TokType::Statement_End )
{
eat( currtok.Type );
}
expr_tok.Length = ( (sptr)currtok.Text + currtok.Length ) - (sptr)expr_tok.Text;
expr = untyped_str( expr_tok );
}
eat( TokType::Statement_End );
using namespace ECode;
CodeVar
result = (CodeVar) make_code();
result->Type = Variable;
result->Name = get_cached_string( name );
result->ModuleFlags = mflags;
result->ValueType = type;
if (array_expr )
type->ArrExpr = array_expr;
if ( attributes )
result->Attributes = attributes;
if ( specifiers )
result->Specs = specifiers;
if ( expr )
result->Value = expr;
return result;
}
internal inline
Code parse_variable_assignment( Parser::TokArray& toks, char const* context )
{
using namespace Parser;
Code expr = Code::Invalid;
if ( currtok.IsAssign )
{
eat( TokType::Operator );
Token expr_tok = currtok;
if ( currtok.Type == TokType::Statement_End )
{
log_failure( "gen::parse_variable: expected expression after assignment operator" );
return Code::Invalid;
}
while ( left && currtok.Type != TokType::Statement_End )
{
expr_tok.Length = ( (sptr)currtok.Text + currtok.Length ) - (sptr)expr_tok.Text;
eat( currtok.Type );
}
expr = untyped_str( expr_tok );
}
return expr;
}
internal inline
Code parse_operator_function_or_variable( bool expects_function, CodeAttributes attributes, CodeSpecifiers specifiers, Parser::TokArray& toks, char const* context )
{
using namespace Parser;
Code result = Code::Invalid;
CodeType type = parse_type( toks, stringize(parse_variable) );
if ( type == Code::Invalid )
return CodeInvalid;
if ( check( TokType::Operator) )
{
// Dealing with an operator overload
result = parse_operator_after_ret_type( ModuleFlag::None, attributes, specifiers, type, toks, stringize(parse_template) );
}
else
{
StrC name = currtok;
eat( TokType::Identifier );
if ( check( TokType::Capture_Start) )
{
// Dealing with a function
result = parse_function_after_name( ModuleFlag::None, attributes, specifiers, type, name, toks, stringize(parse_template) );
}
else
{
if ( expects_function )
{
log_failure( "gen::parse_operator_function_or_variable: expected function declaration (consteval was used)" );
return Code::Invalid;
}
// Dealing with a variable
result = parse_variable_after_name( ModuleFlag::None, attributes, specifiers, type, name, toks, stringize(parse_template) );
}
}
return result;
}
internal
CodeBody parse_class_struct_body( Parser::TokType which, Parser::TokArray& toks, char const* context )
{
using namespace Parser;
using namespace ECode;
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.Type != TokType::BraceCurly_Close )
{
Code member = Code::Invalid;
CodeAttributes attributes = { nullptr };
CodeSpecifiers specifiers = { nullptr };
bool expects_function = false;
switch ( currtok.Type )
{
case TokType::Comment:
member = def_comment( currtok );
eat( TokType::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_class( toks, context );
break;
case TokType::Decl_Enum:
member = parse_enum( toks, context );
break;
case TokType::Decl_Friend:
member = parse_friend( toks, context );
break;
case TokType::Decl_Operator:
member = parse_operator_cast( toks, context );
break;
case TokType::Decl_Struct:
member = parse_struct( toks, context );
break;
case TokType::Decl_Template:
member = parse_template( toks, context );
break;
case TokType::Decl_Typedef:
member = parse_typedef( toks, context );
break;
case TokType::Decl_Union:
member = parse_variable( toks, context );
break;
case TokType::Decl_Using:
member = parse_using( toks, context );
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( toks, context );
}
//! Fallthrough intended
case TokType::Spec_Consteval:
case TokType::Spec_Constexpr:
case TokType::Spec_Constinit:
case TokType::Spec_Inline:
case TokType::Spec_Mutable:
case TokType::Spec_Static:
case TokType::Spec_Volatile:
{
SpecifierT specs_found[16] { ESpecifier::Num_Specifiers };
s32 num_specifiers = 0;
while ( left && tok_is_specifier( currtok ) )
{
SpecifierT spec = ESpecifier::to_type( currtok );
switch ( spec )
{
case ESpecifier::Constexpr:
case ESpecifier::Constinit:
case ESpecifier::Inline:
case ESpecifier::Mutable:
case ESpecifier::Static:
case ESpecifier::Volatile:
break;
case ESpecifier::Consteval:
expects_function = true;
break;
default:
log_failure( "gen::parse_class_struct_body: invalid specifier " "%s" " for variable", ESpecifier::to_str(spec) );
return CodeInvalid;
}
specs_found[num_specifiers] = spec;
num_specifiers++;
eat( currtok.Type );
}
if ( num_specifiers )
{
specifiers = def_specifiers( num_specifiers, specs_found );
}
}
//! 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:
{
member = parse_operator_function_or_variable( expects_function, attributes, specifiers, toks, context );
}
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( "gen::parse_variable: failed to parse member" );
return CodeInvalid;
}
result.append( member );
}
eat( TokType::BraceCurly_Close );
return result;
}
internal
Code parse_class_struct( Parser::TokType which, Parser::TokArray& toks, char const* context )
{
using namespace Parser;
if ( which != TokType::Decl_Class && which != TokType::Decl_Struct )
{
log_failure( "%s: Error, expected class or struct, not %s", context, str_tok_type( which ) );
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( toks, context );
if ( check( TokType::Identifier ) )
name = parse_identifier( toks, context );
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 ( tok_is_access_specifier( currtok ) )
{
access = tok_to_access_specifier( currtok );
}
Token parent_tok = parse_identifier( toks, context );
parent = def_type( parent_tok );
while ( check(TokType::Comma) )
{
eat(TokType::Access_Public);
if ( tok_is_access_specifier( currtok ) )
{
eat(currtok.Type);
}
Token interface_tok = parse_identifier( toks, context );
interfaces.append( def_type( interface_tok ) );
}
}
if ( check( TokType::BraceCurly_Open ) )
{
body = parse_class_struct_body( which, toks, context );
}
eat( TokType::Statement_End );
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
);
interfaces.free();
return result;
}
internal
Code parse_function_body( Parser::TokArray& toks, char const* context )
{
using namespace Parser;
using namespace ECode;
eat( TokType::BraceCurly_Open );
CodeBody
result = (CodeBody) make_code();
result->Type = 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 );
return result;
}
internal
CodeBody parse_global_nspace( CodeT which, Parser::TokArray& toks, char const* context )
{
using namespace Parser;
using namespace ECode;
if ( which != Namespace_Body && which != Global_Body && which != Export_Body && which != Extern_Linkage_Body )
return CodeInvalid;
if ( which != Global_Body )
eat( TokType::BraceCurly_Open );
CodeBody
result = (CodeBody) make_code();
result->Type = which;
while ( left && currtok.Type != TokType::BraceCurly_Close )
{
Code member = Code::Invalid;
CodeAttributes attributes = { nullptr };
CodeSpecifiers specifiers = { nullptr };
bool expects_function = false;
switch ( currtok.Type )
{
case TokType::Comment:
member = def_comment( currtok );
eat( TokType::Comment );
break;
case TokType::Decl_Enum:
member = parse_enum( toks, context);
break;
case TokType::Decl_Class:
member = parse_class( toks, context );
break;
case TokType::Decl_Extern_Linkage:
if ( which == Extern_Linkage_Body )
log_failure( "gen::parse_global_nspace: nested extern linkage" );
member = parse_extern_link_body( toks, context );
break;
case TokType::Decl_Namespace:
member = parse_namespace( toks, context );
break;
case TokType::Decl_Struct:
member = parse_struct( toks, context );
break;
case TokType::Decl_Template:
member = parse_template( toks, context );
break;
case TokType::Decl_Typedef:
member = parse_typedef( toks, context );
break;
case TokType::Decl_Union:
member = parse_union( toks, context );
break;
case TokType::Decl_Using:
member = parse_using( toks, context );
break;
case TokType::Module_Export:
if ( which == Export_Body )
log_failure( "gen::parse_global_nspace: nested export declaration" );
member = parse_export_body( toks, context );
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( toks, context );
}
//! Fallthrough intentional
case TokType::Spec_Consteval:
case TokType::Spec_Constexpr:
case TokType::Spec_Constinit:
case TokType::Spec_Extern:
case TokType::Spec_Global:
case TokType::Spec_Inline:
case TokType::Spec_Internal_Linkage:
case TokType::Spec_Static:
{
SpecifierT specs_found[16] { ESpecifier::Num_Specifiers };
s32 num_specifiers = 0;
while ( left && tok_is_specifier( currtok ) )
{
SpecifierT spec = ESpecifier::to_type( currtok );
switch ( spec )
{
case ESpecifier::Constexpr:
case ESpecifier::Constinit:
case ESpecifier::Inline:
case ESpecifier::Mutable:
case ESpecifier::Static:
case ESpecifier::Volatile:
break;
case ESpecifier::Consteval:
expects_function = true;
break;
default:
log_failure( "gen::parse_global_nspace: invalid specifier " "%s" " for variable", ESpecifier::to_str(spec) );
return CodeInvalid;
}
specs_found[num_specifiers] = spec;
num_specifiers++;
eat( currtok.Type );
}
if ( num_specifiers )
{
specifiers = def_specifiers( num_specifiers, 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:
{
member = parse_operator_function_or_variable( expects_function, attributes, specifiers, toks, context );
}
}
if ( member == Code::Invalid )
{
log_failure( "gen::%s: failed to parse extern linkage member", context );
return CodeInvalid;
}
result.append( member );
}
if ( which != Global_Body )
eat( TokType::BraceCurly_Close );
return result;
}
internal
CodeClass parse_class( Parser::TokArray& toks, char const* context )
{
return (CodeClass) parse_class_struct( Parser::TokType::Decl_Class, toks, context );
}
CodeClass parse_class( StrC def )
{
check_parse_args( parse_class, def );
using namespace Parser;
TokArray toks = lex( def );
if ( toks.Arr == nullptr )
return CodeInvalid;
return (CodeClass) parse_class_struct( TokType::Decl_Class, toks, stringize(parse_class) );
}
internal
CodeEnum parse_enum( Parser::TokArray& toks, char const* context )
{
using namespace Parser;
using namespace ECode;
SpecifierT specs_found[16] { ESpecifier::Num_Specifiers };
s32 num_specifiers = 0;
Token name = { nullptr, 0, TokType::Invalid };
Code array_expr = { nullptr };
CodeType type = { nullptr };
Token body = { nullptr, 0, TokType::Invalid };
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;
}
// TODO : Parse attributes
if ( currtok.Type != TokType::Identifier )
{
log_failure( "gen::parse_enum: expected identifier for enum name" );
return CodeInvalid;
}
name = currtok;
eat( TokType::Identifier );
if ( currtok.Type == TokType::Assign_Classifer )
{
eat( TokType::Assign_Classifer );
type = parse_type( toks, stringize(parse_enum) );
if ( type == Code::Invalid )
return CodeInvalid;
}
if ( currtok.Type == TokType::BraceCurly_Open )
{
eat( TokType::BraceCurly_Open );
body = currtok;
while ( currtok.Type != TokType::BraceCurly_Close )
{
eat( TokType::Identifier);
if ( currtok.Type == TokType::Operator && currtok.Text[0] == '=' )
{
eat( TokType::Operator );
while ( currtok.Type != TokType::Comma && currtok.Type != TokType::BraceCurly_Close )
{
eat( currtok.Type );
}
}
if ( currtok.Type == TokType::Comma )
{
eat( TokType::Comma );
}
}
body.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)body.Text;
eat( TokType::BraceCurly_Close );
}
eat( TokType::Statement_End );
using namespace ECode;
CodeEnum
result = (CodeEnum) make_code();
if ( body.Length )
{
// mem_copy( entries_code, body.Text, body.Length );
Code untyped_body = untyped_str( body );
result->Type = is_enum_class ? Enum_Class : Enum;
result->Body = untyped_body;
}
else
{
result->Type = is_enum_class ? Enum_Class_Fwd : Enum_Fwd;
}
result->Name = get_cached_string( name );
if ( type )
result->UnderlyingType = type;
return result;
}
CodeEnum parse_enum( StrC def )
{
check_parse_args( parse_enum, def );
using namespace Parser;
TokArray toks = lex( def );
if ( toks.Arr == nullptr )
return CodeInvalid;
return parse_enum( toks, stringize(parse_enum) );
}
internal inline
CodeBody parse_export_body( Parser::TokArray& toks, char const* context )
{
return parse_global_nspace( ECode::Export_Body, toks, context );
}
CodeBody parse_export_body( StrC def )
{
check_parse_args( parse_export_body, def );
using namespace Parser;
TokArray toks = lex( def );
if ( toks.Arr == nullptr )
return CodeInvalid;
return parse_export_body( toks, stringize(parse_export_body) );
}
internal inline
CodeBody parse_extern_link_body( Parser::TokArray& toks, char const* context )
{
return parse_global_nspace( ECode::Extern_Linkage_Body, toks, context );
}
internal
CodeExtern parse_extern_link( Parser::TokArray& toks, char const* context )
{
using namespace Parser;
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( toks, context );
if ( entry == Code::Invalid )
{
log_failure( "gen::parse_extern_link: failed to parse body" );
return result;
}
result->Body = entry;
return result;
}
CodeExtern parse_extern_link( StrC def )
{
check_parse_args( parse_extern_link, def );
using namespace Parser;
TokArray toks = lex( def );
if ( toks.Arr == nullptr )
return CodeInvalid;
return parse_extern_link( toks, stringize(parse_extern_link) );
}
internal
CodeFriend parse_friend( Parser::TokArray& toks, char const* context )
{
using namespace Parser;
using namespace ECode;
eat( TokType::Decl_Friend );
CodeFn function = { nullptr };
// Type declaration or return type
CodeType type = parse_type( toks, stringize(parse_friend) );
if ( type == Code::Invalid )
return CodeInvalid;
// Funciton declaration
if ( currtok.Type == TokType::Identifier )
{
// Name
Token name = parse_identifier( toks, stringize(parse_friend) );
// Parameter list
CodeParam params = parse_params( toks, stringize(parse_friend) );
function = make_code();
function->Type = Function_Fwd;
function->Name = get_cached_string( name );
function->ReturnType = type;
if ( params )
function->Params = params;
}
eat( TokType::Statement_End );
CodeFriend
result = (CodeFriend) make_code();
result->Type = Friend;
if ( function )
result->Declaration = function;
else
result->Declaration = type;
return result;
}
CodeFriend parse_friend( StrC def )
{
check_parse_args( parse_friend, def );
using namespace Parser;
TokArray toks = lex( def );
if ( toks.Arr == nullptr )
return CodeInvalid;
return parse_friend( toks, stringize(parse_friend) );
}
internal
CodeFn parse_functon( Parser::TokArray& toks, char const* context )
{
using namespace Parser;
SpecifierT specs_found[16] { ESpecifier::Num_Specifiers };
s32 num_specifiers = 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( toks, context );
while ( left && tok_is_specifier( currtok ) )
{
SpecifierT spec = ESpecifier::to_type( currtok );
switch ( spec )
{
case ESpecifier::Const:
case ESpecifier::Consteval:
case ESpecifier::Constexpr:
case ESpecifier::External_Linkage:
case ESpecifier::Inline:
case ESpecifier::Static:
break;
default:
log_failure( "gen::parse_functon: invalid specifier " "%s" " for functon", ESpecifier::to_str(spec) );
return CodeInvalid;
}
if ( spec == ESpecifier::Const )
continue;
specs_found[num_specifiers] = spec;
num_specifiers++;
eat( currtok.Type );
}
if ( num_specifiers )
{
specifiers = def_specifiers( num_specifiers, specs_found );
}
CodeType ret_type = parse_type( toks, stringize(parse_function) );
if ( ret_type == Code::Invalid )
return CodeInvalid;
Token name = parse_identifier( toks, stringize(parse_function) );
if ( ! name )
return CodeInvalid;
CodeFn result = parse_function_after_name( mflags, attributes, specifiers, ret_type, name, toks, context );
return result;
}
CodeFn parse_function( StrC def )
{
using namespace Parser;
check_parse_args( parse_function, def );
TokArray toks = lex( def );
if ( toks.Arr == nullptr )
return CodeInvalid;
return (CodeFn) parse_functon( toks, stringize(parse_function) );
}
CodeBody parse_global_body( StrC def )
{
check_parse_args( parse_global_body, def );
using namespace Parser;
TokArray toks = lex( def );
if ( toks.Arr == nullptr )
return CodeInvalid;
return parse_global_nspace( ECode::Global_Body, toks, stringize(parse_global_body) );
}
internal
CodeNamespace parse_namespace( Parser::TokArray& toks, char const* context )
{
using namespace Parser;
eat( TokType::Decl_Namespace );
Token name = parse_identifier( toks, stringize(parse_namespace) );
CodeBody body = parse_global_nspace( ECode::Namespace_Body, toks, stringize(parse_namespace) );
if ( body == Code::Invalid )
return CodeInvalid;
CodeNamespace
result = (CodeNamespace) make_code();
result->Type = ECode::Namespace;
result->Name = get_cached_string( name );
result->Body = body;
return result;
}
CodeNamespace parse_namespace( StrC def )
{
check_parse_args( parse_namespace, def );
using namespace Parser;
TokArray toks = lex( def );
if ( toks.Arr == nullptr )
return CodeInvalid;
return parse_namespace( toks, stringize(parse_namespace) );
}
internal
CodeOperator parse_operator( Parser::TokArray& toks, char const* context )
{
using namespace Parser;
CodeAttributes attributes = { nullptr };
CodeSpecifiers specifiers = { nullptr };
ModuleFlag mflags = ModuleFlag::None;
SpecifierT specs_found[16] { ESpecifier::Num_Specifiers };
s32 num_specifiers = 0;
if ( check(TokType::Module_Export) )
{
mflags = ModuleFlag::Export;
eat( TokType::Module_Export );
}
attributes = parse_attributes( toks, context );
while ( left && tok_is_specifier( currtok ) )
{
SpecifierT spec = ESpecifier::to_type( currtok );
switch ( spec )
{
case ESpecifier::Const:
case ESpecifier::Constexpr:
case ESpecifier::Inline:
case ESpecifier::Static:
break;
default:
log_failure( "gen::parse_operator: invalid specifier " "%s" " for operator", ESpecifier::to_str(spec) );
return CodeInvalid;
}
if ( spec == ESpecifier::Const )
continue;
specs_found[num_specifiers] = spec;
num_specifiers++;
eat( currtok.Type );
}
if ( num_specifiers )
{
specifiers = def_specifiers( num_specifiers, specs_found );
}
// Parse Return Type
CodeType ret_type = parse_type( toks, stringize(parse_operator) );
CodeOperator result = parse_operator_after_ret_type( mflags, attributes, specifiers, ret_type, toks, context );
return result;
}
CodeOperator parse_operator( StrC def )
{
check_parse_args( parse_operator, def );
using namespace Parser;
TokArray toks = lex( def );
if ( toks.Arr == nullptr )
return CodeInvalid;
return (CodeOperator) parse_operator( toks, stringize(parse_operator) );
}
CodeOpCast parse_operator_cast( Parser::TokArray& toks, char const* context )
{
using namespace Parser;
eat( TokType::Decl_Operator );
Code type = parse_type( toks, stringize(parse_operator_cast) );
eat( TokType::Capture_Start );
eat( TokType::Capture_End );
CodeSpecifiers specifiers = { nullptr };
if ( check(TokType::Spec_Const))
specifiers = spec_const;
Code body = { nullptr };
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 > 0 )
level--;
eat( currtok.Type );
}
body_str.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)body_str.Text;
body = untyped_str( body_str );
eat( TokType::BraceCurly_Close );
}
CodeOpCast result = (CodeOpCast) make_code();
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;
return result;
}
CodeOpCast parse_operator_cast( StrC def )
{
check_parse_args( parse_operator_cast, def );
using namespace Parser;
TokArray toks = lex( def );
if ( toks.Arr == nullptr )
return CodeInvalid;
return parse_operator_cast( toks, stringize(parse_operator_cast) );
}
internal inline
CodeStruct parse_struct( Parser::TokArray& toks, char const* context )
{
return (CodeStruct) parse_class_struct( Parser::TokType::Decl_Struct, toks, stringize(parse_struct) );
}
CodeStruct parse_struct( StrC def )
{
check_parse_args( parse_struct, def );
using namespace Parser;
TokArray toks = lex( def );
if ( toks.Arr == nullptr )
return CodeInvalid;
return (CodeStruct) parse_class_struct( TokType::Decl_Struct, toks, stringize(parse_struct) );
}
internal
CodeTemplate parse_template( Parser::TokArray& toks, char const* context )
{
# define UseTemplateCapture true
using namespace Parser;
ModuleFlag mflags = ModuleFlag::None;
if ( check(TokType::Module_Export) )
{
mflags = ModuleFlag::Export;
eat( TokType::Module_Export );
}
eat( TokType::Decl_Template );
Code params = parse_params( toks, stringize(parse_template), UseTemplateCapture );
if ( params == Code::Invalid )
return CodeInvalid;
Code definition = { nullptr };
while ( left )
{
if ( check( TokType::Decl_Class ) )
{
definition = parse_class( toks, stringize(parse_template) );
break;
}
if ( check( TokType::Decl_Struct ) )
{
definition = parse_enum( toks, stringize(parse_template) );
break;
}
if ( check( TokType::Decl_Using ))
{
definition = parse_using( toks, stringize(parse_template) );
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::Num_Specifiers };
s32 num_specifiers = 0;
attributes = parse_attributes( toks, stringize(parse_template) );
while ( left && tok_is_specifier( currtok ) )
{
SpecifierT spec = ESpecifier::to_type( currtok );
switch ( spec )
{
case ESpecifier::Const:
case ESpecifier::Constexpr:
case ESpecifier::Constinit:
case ESpecifier::External_Linkage:
case ESpecifier::Global:
case ESpecifier::Inline:
case ESpecifier::Local_Persist:
case ESpecifier::Mutable:
case ESpecifier::Static:
case ESpecifier::Thread_Local:
case ESpecifier::Volatile:
break;
case ESpecifier::Consteval:
expects_function = true;
break;
default:
log_failure( "gen::parse_template: invalid specifier %s for variable or function", ESpecifier::to_str( spec ) );
return CodeInvalid;
}
// Ignore const it will be handled by the type
if ( spec == ESpecifier::Const )
continue;
specs_found[num_specifiers] = spec;
num_specifiers++;
eat( currtok.Type );
}
if ( num_specifiers )
{
specifiers = def_specifiers( num_specifiers, specs_found );
}
definition = parse_operator_function_or_variable( expects_function, attributes, specifiers, toks, stringize(parse_template) );
break;
}
CodeTemplate
result = (CodeTemplate) make_code();
result->Type = ECode::Template;
result->Params = params;
result->Declaration = definition;
result->ModuleFlags = mflags;
return result;
# undef UseTemplateCapture
}
CodeTemplate parse_template( StrC def )
{
check_parse_args( parse_template, def );
using namespace Parser;
TokArray toks = lex( def );
if ( toks.Arr == nullptr )
return CodeInvalid;
return parse_template( toks, stringize(parse_template) );
}
internal
CodeType parse_type( Parser::TokArray& toks, char const* context )
{
using namespace Parser;
Token context_tok = prevtok;
SpecifierT specs_found[16] { ESpecifier::Num_Specifiers };
s32 num_specifiers = 0;
Token name = { nullptr, 0, TokType::Invalid };
Token brute_sig = { currtok.Text, 0, TokType::Invalid };
CodeAttributes attributes = parse_attributes( toks, context );
while ( left && tok_is_specifier( currtok ) )
{
SpecifierT spec = ESpecifier::to_type( currtok );
if ( spec != ESpecifier::Const )
{
log_failure( "gen::parse_type: Error, invalid specifier used in type definition: %s", currtok.Text );
return CodeInvalid;
}
specs_found[num_specifiers] = spec;
num_specifiers++;
eat( currtok.Type );
}
if ( left == 0 )
{
log_failure( "%s: Error, unexpected end of type definition", context );
return CodeInvalid;
}
if ( currtok.Type == TokType::Decl_Class
|| currtok.Type == TokType::Decl_Enum
|| currtok.Type == TokType::Decl_Struct )
{
name = currtok;
eat( currtok.Type );
name.Length = ( (sptr)currtok.Text + currtok.Length ) - (sptr)name.Text;
eat( TokType::Identifier );
}
else if ( currtok.Type >= TokType::Type_Unsigned )
{
name = currtok;
eat( currtok.Type );
while (currtok.Type >= TokType::Type_Unsigned)
{
eat( currtok.Type );
}
name.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)name.Text;
}
else
{
name = parse_identifier( toks, context );
if ( ! name )
return CodeInvalid;
// Problably dealing with a templated symbol
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
name.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)name.Text;
}
}
while ( left && tok_is_specifier( currtok ) )
{
SpecifierT spec = ESpecifier::to_type( currtok );
if ( spec != ESpecifier::Const
&& spec != ESpecifier::Ptr
&& spec != ESpecifier::Ref
&& spec != ESpecifier::RValue )
{
log_failure( "%s: Error, invalid specifier used in type definition: %s", context, currtok.Text );
return CodeInvalid;
}
specs_found[num_specifiers] = spec;
num_specifiers++;
eat( currtok.Type );
}
// Not sure if its technically possible to cast ot a function pointer user defined operator cast...
// Supporting it is not worth the effort.
if ( check( TokType::Capture_Start ) && context_tok.Type != TokType::Decl_Operator )
{
// Its a function type
eat( TokType::Capture_Start );
while ( check( TokType::Star ) || currtok.Type == TokType::Spec_Const )
{
eat( currtok.Type );
}
// if its a using statement there will not be an ID.
if ( check( TokType::Identifier ) )
eat(TokType::Identifier);
eat( TokType::Capture_End );
// Parameters
eat( TokType::Capture_Start );
// TODO : Change this to validate the parameters...
// Bruteforce lex the parameters, no validation.
s32 level = 0;
while ( ! check( TokType::Capture_End ) || level > 0 )
{
if ( check( TokType::Capture_Start ) )
level++;
if ( check( TokType::Capture_End ) )
level--;
eat( currtok.Type );
}
eat(TokType::Capture_End);
brute_sig.Length = ( (sptr)prevtok.Text + prevtok.Length ) - (sptr)brute_sig.Text;
}
using namespace ECode;
CodeType
result = (CodeType) make_code();
result->Type = Typename;
if ( brute_sig.Length > 0 )
{
// Bruteforce all tokens together.
name = brute_sig;
}
else
{
if (num_specifiers)
{
Code specifiers = def_specifiers( num_specifiers, (SpecifierT*)specs_found );
result->Specs = specifiers;
}
}
result->Name = get_cached_string( name );
if ( attributes )
result->Attributes = attributes;
return result;
}
CodeType parse_type( StrC def )
{
check_parse_args( parse_type, def );
using namespace Parser;
TokArray toks = lex( def );
if ( toks.Arr == nullptr )
return CodeInvalid;
CodeType result = parse_type( toks, stringize(parse_type) );
return result;
}
internal
CodeTypedef parse_typedef( Parser::TokArray& toks, char const* context )
{
using namespace Parser;
Token name = { nullptr, 0, TokType::Invalid };
Code array_expr = { nullptr };
Code type = { nullptr };
ModuleFlag mflags = ModuleFlag::None;
if ( check(TokType::Module_Export) )
{
mflags = ModuleFlag::Export;
eat( TokType::Module_Export );
}
eat( TokType::Decl_Typedef );
if ( check( TokType::Decl_Enum ) )
type = parse_enum( toks, context );
else if ( check(TokType::Decl_Class ) )
type = parse_class( toks, context );
else if ( check(TokType::Decl_Struct ) )
type = parse_struct( toks, context );
else if ( check(TokType::Decl_Union) )
type = parse_union( toks, context );
else
type = parse_type( toks, context );
if ( ! check( TokType::Identifier ) )
{
log_failure( "gen::parse_typedef: Error, expected identifier for typedef" );
return CodeInvalid;
}
name = currtok;
eat( TokType::Identifier );
array_expr = parse_array_decl( toks, context );
eat( TokType::Statement_End );
using namespace ECode;
CodeTypedef
result = (CodeTypedef) make_code();
result->Type = Typedef;
result->Name = get_cached_string( name );
result->ModuleFlags = mflags;
result->UnderlyingType = type;
if ( type->Type == Typename && array_expr && array_expr->Type != Invalid )
type.cast<CodeType>()->ArrExpr = array_expr;
return result;
}
CodeTypedef parse_typedef( StrC def )
{
check_parse_args( parse_typedef, def );
using namespace Parser;
TokArray toks = lex( def );
if ( toks.Arr == nullptr )
return CodeInvalid;
return parse_typedef( toks, stringize(parse_typedef) );
}
internal
CodeUnion parse_union( Parser::TokArray& toks, char const* context )
{
using namespace Parser;
ModuleFlag mflags = ModuleFlag::None;
if ( check(TokType::Module_Export) )
{
mflags = ModuleFlag::Export;
eat( TokType::Module_Export );
}
eat( TokType::Decl_Union );
CodeAttributes attributes = parse_attributes( toks, context );
StrC name = { 0, nullptr };
if ( check( TokType::Identifier ) )
{
name = currtok;
eat( TokType::Identifier );
}
CodeBody body = { nullptr };
eat( TokType::BraceCurly_Open );
body = make_code();
body->Type = ECode::Union_Body;
while ( ! check( TokType::BraceCurly_Close ) )
{
Code entry = parse_variable( toks, context );
if ( entry )
body.append( entry );
}
eat( TokType::BraceCurly_Close );
eat( TokType::Statement_End );
CodeUnion
result = (CodeUnion) make_code();
result->Type = ECode::Union;
result->ModuleFlags = mflags;
if ( name )
result->Name = get_cached_string( name );
if ( body )
result->Body = body;
if ( attributes )
result->Attributes = attributes;
return result;
}
CodeUnion parse_union( StrC def )
{
check_parse_args( parse_union, def );
using namespace Parser;
TokArray toks = lex( def );
if ( toks.Arr == nullptr )
return CodeInvalid;
return parse_union( toks, stringize(parse_union) );
}
internal
CodeUsing parse_using( Parser::TokArray& toks, char const* context )
{
using namespace Parser;
SpecifierT specs_found[16] { ESpecifier::Invalid };
s32 num_specifiers = 0;
Token name = { nullptr, 0, TokType::Invalid };
Code array_expr = { nullptr };
CodeType type = { nullptr };
bool is_namespace = false;
ModuleFlag mflags = ModuleFlag::None;
CodeAttributes attributes = { nullptr };
if ( check(TokType::Module_Export) )
{
mflags = ModuleFlag::Export;
eat( TokType::Module_Export );
}
eat( TokType::Decl_Using );
if ( currtok.Type == TokType::Decl_Namespace )
{
is_namespace = true;
eat( TokType::Decl_Namespace );
}
name = currtok;
eat( TokType::Identifier );
if ( currtok.IsAssign )
{
attributes = parse_attributes( toks, context );
eat( TokType::Operator );
type = parse_type( toks, context );
}
array_expr = parse_array_decl( toks, context );
eat( TokType::Statement_End );
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;
}
return result;
}
CodeUsing parse_using( StrC def )
{
check_parse_args( parse_using, def );
using namespace Parser;
TokArray toks = lex( def );
if ( toks.Arr == nullptr )
return CodeInvalid;
return parse_using( toks, stringize(parse_using) );
}
internal
CodeVar parse_variable( Parser::TokArray& toks, char const* context )
{
using namespace Parser;
Token name = { nullptr, 0, TokType::Invalid };
SpecifierT specs_found[16] { ESpecifier::Num_Specifiers };
s32 num_specifiers = 0;
ModuleFlag mflags = ModuleFlag::None;
CodeAttributes attributes = { nullptr };
CodeSpecifiers specifiers = { nullptr };
if ( check(TokType::Module_Export) )
{
mflags = ModuleFlag::Export;
eat( TokType::Module_Export );
}
attributes = parse_attributes( toks, context );
while ( left && tok_is_specifier( currtok ) )
{
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( "gen::parse_variable: invalid specifier %s for variable", ESpecifier::to_str( spec ) );
return CodeInvalid;
}
// Ignore const specifiers, they're handled by the type
if ( spec == ESpecifier::Const )
continue;
specs_found[num_specifiers] = spec;
num_specifiers++;
eat( currtok.Type );
}
if ( num_specifiers )
{
specifiers = def_specifiers( num_specifiers, specs_found );
}
CodeType type = parse_type( toks, context );
if ( type == Code::Invalid )
return CodeInvalid;
name = currtok;
eat( TokType::Identifier );
CodeVar result = parse_variable_after_name( mflags, attributes, specifiers, type, name, toks, context );
return result;
}
CodeVar parse_variable( StrC def )
{
check_parse_args( parse_variable, def );
using namespace Parser;
TokArray toks = lex( def );
if ( toks.Arr == nullptr )
return CodeInvalid;
return parse_variable( toks, stringize(parse_variable) );
}
// Undef helper macros
# undef check_parse_args
# undef curr_tok
# undef eat
# undef left
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