[gcc r14-7447] gccrs: ast: Fix attribute tokenstreams

[Arthur Cohen]

https://gcc.gnu.org/g:21c46e84e8b461a2d80b6fb6c2a006a8552a52a6

commit r14-7447-g21c46e84e8b461a2d80b6fb6c2a006a8552a52a6
Author: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
Date:   Tue Apr 4 15:56:02 2023 +0200

    gccrs: ast: Fix attribute tokenstreams
    
    Attributes were not converted to a correct tokenstream, furthermore meta
    items containers and token trees attribute arguments were not even
    implemented. This commit fix the literal attribute type and implement
    both unimplemented types.
    
    gcc/rust/ChangeLog:
    
            * ast/rust-ast-tokenstream.cc (TokenStream::visit): Fix existing
            and implement remaining attribute visitors.
    
    Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

Diff:
---
 gcc/rust/ast/rust-ast-tokenstream.cc | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/gcc/rust/ast/rust-ast-tokenstream.cc b/gcc/rust/ast/rust-ast-tokenstream.cc
index 761e899a06b..0db1e2ccfed 100644
--- a/gcc/rust/ast/rust-ast-tokenstream.cc
+++ b/gcc/rust/ast/rust-ast-tokenstream.cc
@@ -159,27 +159,19 @@ TokenStream::visit (Attribute &attrib)
 
   if (attrib.has_attr_input ())
     {
-      tokens.push_back (Rust::Token::make (EQUAL, Location ()));
-
       switch (attrib.get_attr_input ().get_attr_input_type ())
 	{
 	  case AST::AttrInput::AttrInputType::LITERAL: {
-	    auto &literal
-	      = static_cast<AST::AttrInputLiteral &> (attrib.get_attr_input ())
-		  .get_literal ();
-	    auto value = literal.as_string ();
-	    tokens.push_back (Rust::Token::make (DOUBLE_QUOTE, Location ()));
-	    tokens.push_back (Rust::Token::make_string (literal.get_locus (),
-							std::move (value)));
-	    tokens.push_back (Rust::Token::make (DOUBLE_QUOTE, Location ()));
+	    visit (static_cast<AttrInputLiteral &> (attrib.get_attr_input ()));
 	    break;
 	  }
 	  case AST::AttrInput::AttrInputType::META_ITEM: {
-	    // FIXME: Implement this
+	    visit (static_cast<AttrInputMetaItemContainer &> (
+	      attrib.get_attr_input ()));
 	    break;
 	  }
 	  case AST::AttrInput::AttrInputType::TOKEN_TREE: {
-	    // FIXME: Implement this
+	    visit (static_cast<DelimTokenTree &> (attrib.get_attr_input ()));
 	    break;
 	  }
 	default: