[gcc r14-7996] gccrs: Retrieve def for derive & attribute proc macros

[Arthur Cohen]

https://gcc.gnu.org/g:91461d3e7335aecbdfc821acdbe48b8556434965

commit r14-7996-g91461d3e7335aecbdfc821acdbe48b8556434965
Author: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
Date:   Tue Aug 29 15:59:58 2023 +0200

    gccrs: Retrieve def for derive & attribute proc macros
    
    Add definition retrieval for derive and attribute proc macro types.
    
    gcc/rust/ChangeLog:
    
            * resolve/rust-early-name-resolver-2.0.cc (Early::visit_attributes):
            Add proc macro handle retrieval for attribute and derive proc macros.
    
    Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

Diff:
---
 gcc/rust/resolve/rust-early-name-resolver-2.0.cc | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/gcc/rust/resolve/rust-early-name-resolver-2.0.cc b/gcc/rust/resolve/rust-early-name-resolver-2.0.cc
index 7373e623266..57a38078f14 100644
--- a/gcc/rust/resolve/rust-early-name-resolver-2.0.cc
+++ b/gcc/rust/resolve/rust-early-name-resolver-2.0.cc
@@ -177,6 +177,8 @@ Early::visit (AST::UseTreeGlob &use)
 void
 Early::visit_attributes (std::vector<AST::Attribute> &attrs)
 {
+  auto mappings = Analysis::Mappings::get ();
+
   for (auto &attr : attrs)
     {
       auto name = attr.get_path ().get_segments ().at (0).get_segment_name ();
@@ -192,7 +194,16 @@ Early::visit_attributes (std::vector<AST::Attribute> &attrs)
 		  // FIXME: Change to proper error message
 		  rust_error_at (trait.get ().get_locus (),
 				 "could not resolve trait");
+		  continue;
 		}
+
+	      auto pm_def
+		= mappings->lookup_derive_proc_macro_def (definition.value ());
+
+	      rust_assert (pm_def.has_value ());
+
+	      mappings->insert_derive_proc_macro_invocation (trait,
+							     pm_def.value ());
 	    }
 	}
       else if (Analysis::BuiltinAttributeMappings::get ()
@@ -207,6 +218,13 @@ Early::visit_attributes (std::vector<AST::Attribute> &attrs)
 			     "could not resolve attribute macro invocation");
 	      return;
 	    }
+	  auto pm_def
+	    = mappings->lookup_attribute_proc_macro_def (definition.value ());
+
+	  rust_assert (pm_def.has_value ());
+
+	  mappings->insert_attribute_proc_macro_invocation (attr.get_path (),
+							    pm_def.value ());
 	}
     }
 }