gencpp/project/components/etoktype.cpp

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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.
*/
#ifndef GEN_DEFINE_ATTRIBUTE_TOKENS
# define GEN_DEFINE_ATTRIBUTE_TOKENS \
Entry( API_Export, "GEN_API_Export_Code" ) \
Entry( API_Import, "GEN_API_Import_Code" )
#endif
# define Define_TokType \
Entry( Invalid, "INVALID" ) \
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( Preprocess_Define, "#define") \
Entry( Preproces_Include, "include" ) \
Entry( Preprocess_If, "#if") \
Entry( Preprocess_Elif, "#elif") \
Entry( Preprocess_Else, "#else") \
Entry( Preprocess_EndIf, "#endif") \
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__" )
namespace ETokType
{
enum Type : u32
{
# define Entry( Name_, Str_ ) Name_,
Define_TokType
GEN_DEFINE_ATTRIBUTE_TOKENS
# undef Entry
NumTokens,
};
internal inline
Type to_type( StrC str_tok )
{
local_persist
StrC lookup[(u32)NumTokens] =
{
# define Entry( Name_, Str_ ) { sizeof(Str_), Str_ },
Define_TokType
GEN_DEFINE_ATTRIBUTE_TOKENS
# undef Entry
};
for ( u32 index = 0; index < (u32)NumTokens; index++ )
{
s32 lookup_len = lookup[index].Len - 1;
char const* lookup_str = lookup[index].Ptr;
if ( lookup_len != str_tok.Len )
continue;
if ( str_compare( str_tok.Ptr, lookup_str, lookup_len ) == 0 )
return scast(Type, index);
}
return Invalid;
}
internal inline
char const* to_str( Type type )
{
local_persist
char const* lookup[(u32)NumTokens] =
{
# define Entry( Name_, Str_ ) Str_,
Define_TokType
GEN_DEFINE_ATTRIBUTE_TOKENS
# undef Entry
};
return lookup[(u32)type];
}
# undef Define_TokType
};
using TokType = ETokType::Type;
} // Parser