Change enum to enum class

gcc/rust/ChangeLog:

	* parse/rust-parse-impl.h: Add enum prefix.
	* parse/rust-parse.h (enum ParseSelfError): Change from enum...
	(enum class): To enum class.

Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

Author: P-E-P

gcc/rust/parse/rust-parse-impl.h

@@ -5604,7 +5604,8 @@ Parser<ManagedTokenSource>::parse_inherent_impl_function_or_method (
   // param
   auto initial_param = parse_self_param ();
 
-  if (!initial_param.has_value () && initial_param.error () != NOT_SELF)
+  if (!initial_param.has_value ()
+      && initial_param.error () != ParseSelfError::NOT_SELF)
     return nullptr;
 
   /* FIXME: ensure that self param doesn't accidently consume tokens for a
@@ -5803,7 +5804,8 @@ Parser<ManagedTokenSource>::parse_trait_impl_function_or_method (
   // param
   auto initial_param = parse_self_param ();
 
-  if (!initial_param.has_value () && initial_param.error () != NOT_SELF)
+  if (!initial_param.has_value ()
+      && initial_param.error () != ParseSelfError::NOT_SELF)
     return nullptr;
 
   // FIXME: ensure that self param doesn't accidently consume tokens for a

gcc/rust/parse/rust-parse.h

@@ -39,7 +39,7 @@ enum class ParseLoopLabelError
   NOT_LOOP_LABEL,
   MISSING_COLON,
 };
-enum ParseSelfError
+enum class ParseSelfError
 {
   SELF_PTR,
   PARSING,