refactor some attribute functions in rust-ast-lower-base.cc and rust-toplevel-name-resolver.cc

gcc/rust/hir/rust-ast-lower-base.cc

@@ -993,12 +993,9 @@ ASTLoweringBase::lower_extern_block (AST::ExternBlock &extern_block)
 void
 ASTLoweringBase::lower_macro_definition (AST::MacroRulesDefinition &def)
 {
-  auto is_export = false;
-  for (const auto &attr : def.get_outer_attrs ())
-    if (attr.get_path ().as_string () == Values::Attributes::MACRO_EXPORT)
-      is_export = true;
-
-  if (is_export)
+
+
+  if (Analysis::Attributes::is_macro_export(def.get_outer_attrs()))
     {
       mappings.insert_exported_macro (def);
       mappings.insert_ast_item (&def);

gcc/rust/resolve/rust-toplevel-name-resolver-2.0.cc

@@ -22,6 +22,7 @@
 #include "rust-ast-full.h"
 #include "rust-hir-map.h"
 #include "rust-attribute-values.h"
+#include "rust-attributes.h"
 
 namespace Rust {
 namespace Resolver2_0 {

gcc/rust/util/rust-attributes.cc

@@ -37,7 +37,17 @@ Attributes::is_known (const std::string &attribute_path)
 
   return !lookup.is_error ();
 }
+bool
+Attributes::is_macro_export (const AST::AttrVec outer_attrs)
+{
+  for (const auto &attr : outer_attrs)
+
+    if (attr.get_path ().as_string () == Values::Attributes::MACRO_EXPORT)
 
+      return true;
+
+  return false;
+}
 using Attrs = Values::Attributes;
 
 // https://doc.rust-lang.org/stable/nightly-rustc/src/rustc_feature/builtin_attrs.rs.html#248

gcc/rust/util/rust-attributes.h

@@ -29,6 +29,7 @@ class Attributes
 {
 public:
   static bool is_known (const std::string &attribute_path);
+  static bool is_macro_export (const AST::AttrVec outer_attrs);
 };
 
 enum CompilerPass