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Some cleanup of gencpp

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This commit is contained in:
Edward R. Gonzalez 2024-04-16 01:20:15 -04:00
parent 6e3dfb70be
commit 9423cd0f0a
2 changed files with 140 additions and 87 deletions
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10
Project/Source/GasaGen/GasaGen.cpp
View File

@ -125,8 +125,8 @@ int gen_main()
case CodeT::Function_Fwd:
if ( class_code->Name )
{
// log_fmt("%s\n", class_code->Name );
log_fmt("%s\n", class_code->to_string() );
log_fmt("%s\n", class_code->Name );
// log_fmt("%s\n", class_code->to_string() );
}
break;
}
@ -176,7 +176,7 @@ int gen_main()
#define path_AActor \
R"(C:\projects\Unreal\Surgo\UE\Engine\Source\Runtime\Engine\Classes\GameFramework\Actor.h)"
#if 0
#if 1
content = file_read_contents( GlobalAllocator, true, path_AActor );
CodeBody parsed_aactor = parse_global_body( StrC { content.size, (char const*)content.data });
@ -194,8 +194,8 @@ int gen_main()
switch ( class_code->Type )
{
case CodeT::Variable:
// case CodeT::Function:
// case CodeT::Function_Fwd:
case CodeT::Function:
case CodeT::Function_Fwd:
if ( class_code->Name )
{
log_fmt("%s\n", class_code->Name );

217
Project/Source/GasaGen/gen.cpp
View File

@ -7294,6 +7294,115 @@ namespace parser
constexpr bool strip_formatting_dont_preserve_newlines = false;
internal inline
bool is_constructor_definition()
{
/*
To check if a definition is for a constructor we can go straight to the opening parenthesis for its parameters
From There we work backwards to see if we come across two identifiers with the same name between an member access
:: operator, there can be template parameters on the left of the :: so we ignore those.
Whats important is that its back to back.
This has multiple possible faults. What we parse using this method may not filter out if something has a "return type"
This is bad since technically you could have a namespace nested into another namespace with the same name.
If this awful pattern is done the only way to distiguish with this coarse parse is to know there is no return type defined.
TODO(Ed): We could fix this by attempting to parse a type, but we would have to have a way to have it soft fail and rollback.
*/
TokArray tokens = Context.Tokens;
s32 idx = tokens.Idx;
Token nav = tokens[ idx ];
for ( ; idx < tokens.Arr.num(); idx++, nav = tokens[ idx ] )
{
if ( nav.Text[0] == '<' )
{
// Skip templated expressions as they mey have expressions with the () operators
s32 capture_level = 0;
s32 template_level = 0;
for ( ; idx < tokens.Arr.num(); idx++, nav = tokens[idx] )
{
if (nav.Text[ 0 ] == '<')
++ template_level;
if (nav.Text[ 0 ] == '>')
-- template_level;
if (nav.Type == TokType::Operator && nav.Text[1] == '>')
-- template_level;
if ( nav.Type == ETokType::Capture_Start)
{
if (template_level != 0 )
++ capture_level;
else
break;
}
if ( template_level != 0 && nav.Type == ETokType::Capture_End)
-- capture_level;
}
}
if ( nav.Type == TokType::Capture_Start )
break;
}
-- idx;
Token tok_right = tokens[idx];
Token tok_left = NullToken;
if (tok_right.Type != TokType::Identifier)
{
// We're not dealing with a constructor if there is no identifier right before the opening of a parameter's scope.
return false;
}
-- idx;
tok_left = tokens[idx];
// <Attributes> <Specifiers> ... <Identifier>
if ( tok_left.Type != TokType::Access_StaticSymbol )
return false;
-- idx;
tok_left = tokens[idx];
// <Attributes> <Specifiers> ... :: <Identifier>
// We search toward the left until we find the next valid identifier
s32 capture_level = 0;
s32 template_level = 0;
while ( idx != tokens.Idx )
{
if (tok_left.Text[ 0 ] == '<')
++ template_level;
if (tok_left.Text[ 0 ] == '>')
-- template_level;
if (tok_left.Type == TokType::Operator && tok_left.Text[1] == '>')
-- template_level;
if ( template_level != 0 && tok_left.Type == ETokType::Capture_Start)
++ capture_level;
if ( template_level != 0 && tok_left.Type == ETokType::Capture_End)
-- capture_level;
if ( capture_level == 0 && template_level == 0 && tok_left.Type == TokType::Identifier )
break;
-- idx;
tok_left = tokens[idx];
}
bool is_same = str_compare( tok_right.Text, tok_left.Text, tok_right.Length ) == 0;
if (tok_left.Type == TokType::Identifier && is_same)
{
// We have found the pattern we desired
// <Name> :: <Name> (
return true;
}
}
/*
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.
@ -7835,6 +7944,7 @@ namespace parser
internal neverinline CodeBody parse_class_struct_body( TokType which, Token name )
{
using namespace ECode;
push_scope();
eat( TokType::BraceCurly_Open );
@ -7856,7 +7966,7 @@ namespace parser
bool expects_function = false;
Context.Scope->Start = currtok_noskip;
// Context.Scope->Start = currtok_noskip;
if ( currtok_noskip.Type == TokType::Preprocess_Hash )
eat( TokType::Preprocess_Hash );
@ -8576,6 +8686,8 @@ namespace parser
{
using namespace ECode;
push_scope();
if ( which != Namespace_Body && which != Global_Body && which != Export_Body && which != Extern_Linkage_Body )
return CodeInvalid;
@ -8594,7 +8706,7 @@ namespace parser
bool expects_function = false;
Context.Scope->Start = currtok_noskip;
// Context.Scope->Start = currtok_noskip;
if ( currtok_noskip.Type == TokType::Preprocess_Hash )
eat( TokType::Preprocess_Hash );
@ -8788,6 +8900,7 @@ namespace parser
StrC spec_str = ESpecifier::to_str( spec );
log_failure( "Invalid specifier %.*s for variable\n%s", spec_str.Len, spec_str, Context.to_string() );
Context.pop();
return CodeInvalid;
}
@ -8817,6 +8930,14 @@ namespace parser
case TokType::Type_double :
case TokType::Type_int :
{
// Possible constructor implemented at global file scope.
if (is_constructor_definition())
{
member = parse_constructor( specifiers );
// <Attributes> <Specifiers> <Name> :: <Name> <Type> () { ... }
break;
}
bool found_operator_cast_outside_class_implmentation = false;
s32 idx = Context.Tokens.Idx;
@ -8855,6 +8976,7 @@ namespace parser
if ( member == Code::Invalid )
{
log_failure( "Failed to parse member\n%s", Context.to_string() );
Context.pop();
return CodeInvalid;
}
@ -8866,6 +8988,7 @@ namespace parser
eat( TokType::BraceCurly_Close );
// { <Body> }
Context.pop();
return result;
}
@ -10980,90 +11103,20 @@ namespace parser
// <export> template< <Parameters> > <Attributes> <Specifiers>
}
bool has_context = Context.Scope && Context.Scope->Prev;
bool is_in_global_nspace = has_context && str_compare( Context.Scope->Prev->ProcName, "parse_global_nspace" ) == 0;
// Possible constructor implemented at global file scope.
if (is_in_global_nspace && is_constructor_definition())
{
/*
To check if a definition is for a constructor we can go straight to the opening parenthesis for its parameters
From There we work backwards to see if we come across two identifiers with the same name between an member access
:: operator, there can be template parameters on the left of the :: so we ignore those.
Whats important is that its back to back.
This has multiple possible faults. What we parse using this method may not filter out if something has a "return type"
This is bad since technically you could have a namespace nested into another namespace with the same name.
If this awful pattern is done the only way to distiguish with this coarse parse is to know there is no return type defined.
We could fix this by attempting to parse a type, but we would have to have a way to have it soft fail and rollback.
*/
TokArray tokens = Context.Tokens;
s32 idx = tokens.Idx;
s32 level = 0;
for ( ; idx < tokens.Arr.num(); idx++ )
{
if ( level == 0 && tokens[ idx ].Type == TokType::Capture_Start )
break;
}
-- idx;
Token tok_right = tokens[idx];
Token tok_left = NullToken;
if (tok_right.Type != TokType::Identifier)
{
// We're not dealing with a constructor if there is no identifier right before the opening of a parameter's scope.
break;
}
-- idx;
tok_left = tokens[idx];
// <Attributes> <Specifiers> ... <Identifier>
if ( tok_left.Type != TokType::Access_StaticSymbol )
break;
-- idx;
tok_left = tokens[idx];
// <Attributes> <Specifiers> ... :: <Identifier>
// We search toward the left until we find the next valid identifier
s32 capture_level = 0;
s32 template_level = 0;
while ( idx != tokens.Idx )
{
if (tok_left.Text[ 0 ] == '<')
++ template_level;
if (tok_left.Text[ 0 ] == '>')
-- template_level;
if (tok_left.Type == TokType::Operator && tok_left.Text[1] == '>')
-- template_level;
if ( template_level != 0 && tok_left.Type == ETokType::Capture_Start)
++ capture_level;
if ( template_level != 0 && tok_left.Type == ETokType::Capture_End)
-- capture_level;
if ( capture_level == 0 && template_level == 0 && tok_left.Type == TokType::Identifier )
break;
-- idx;
tok_left = tokens[idx];
}
bool is_same = str_compare( tok_right.Text, tok_left.Text, tok_right.Length ) == 0;
if (tok_left.Type == TokType::Identifier && is_same)
{
// We have found the pattern we desired
// <Name> :: <Name> (
definition = parse_constructor( specifiers );
// <Attributes> <Specifiers> <Name> :: <Name> <Type> () { ... }
break;
}
definition = parse_constructor( specifiers );
// <Attributes> <Specifiers> <Name> :: <Name> <Type> () { ... }
break;
}
// User Defined operator casts
// Possible user Defined operator casts
if (is_in_global_nspace)
{
bool found_operator_cast_outside_class_implmentation = false;
s32 idx = Context.Tokens.Idx;