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gccrs: Parse variadic functions

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Variadic functions were not parsed because it is an unstable feature.
While it is still unstable, it is required in order to parse libcore.

gcc/rust/ChangeLog:

	* parse/rust-parse-impl.h (Parser::parse_function_param): Parse
	variadic functions.

Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
This commit is contained in:
Pierre-Emmanuel Patry 2023-10-18 14:31:53 +02:00 • committed by Arthur Cohen
parent f1cca5671f
commit 6ac7d47338
1 changed files with 23 additions and 7 deletions
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30
gcc/rust/parse/rust-parse-impl.h
View file

@ -3584,6 +3584,13 @@ Parser<ManagedTokenSource>::parse_function_param ()
// TODO: should saved location be at start of outer attributes or pattern?
location_t locus = lexer.peek_token ()->get_locus ();
if (lexer.peek_token ()->get_id () == ELLIPSIS) // Unnamed variadic
{
lexer.skip_token (); // Skip ellipsis
return AST::FunctionParam (std::move (outer_attrs), locus);
}
std::unique_ptr<AST::Pattern> param_pattern = parse_pattern ();
// create error function param if it doesn't exist
@ -3599,15 +3606,24 @@ Parser<ManagedTokenSource>::parse_function_param ()
return AST::FunctionParam::create_error ();
}
std::unique_ptr<AST::Type> param_type = parse_type ();
if (param_type == nullptr)
if (lexer.peek_token ()->get_id () == ELLIPSIS) // Named variadic
{
// skip?
return AST::FunctionParam::create_error ();
lexer.skip_token (); // Skip ellipsis
return AST::FunctionParam (std::move (param_pattern),
std::move (outer_attrs), locus);
}
else
{
std::unique_ptr<AST::Type> param_type = parse_type ();
if (param_type == nullptr)
{
// skip?
return AST::FunctionParam::create_error ();
}
return AST::FunctionParam (std::move (param_pattern),
std::move (param_type),
std::move (outer_attrs), locus);
}
return AST::FunctionParam (std::move (param_pattern), std::move (param_type),
std::move (outer_attrs), locus);
}
/* Parses a function or method return type syntactical construction. Also