From: Jason Merrill <jason@redhat.com>
Date: Mon, 13 Sep 2021 20:10:09 +0000 (-0400)
Subject: c++: correct object scope handling
X-Git-Tag: basepoints/gcc-13~4776
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ba9b07d0259b38a9eccd4eb0df327d3aaabad3c6;p=thirdparty%2Fgcc.git

c++: correct object scope handling

The way cp_parser_lookup_name handles object scope (i.e. the scope on the
RHS of a . or -> expression) is a bit subtle: before the lookup it's in
parser->context->object type, and after the lookup it's in
parser->object_scope.  But a couple of places that elide lookups were
failing to do the same transform.

I'm not aware of this breaking anything currently.

gcc/cp/ChangeLog:

	* parser.c (cp_parser_template_name): Move object type.
	(cp_parser_pre_parsed_nested_name_specifier): Likewise.
---

diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index ab1dc81b9970..7a0b62343509 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -18405,6 +18405,7 @@ cp_parser_template_name (cp_parser* parser,
 	    {
 	      /* We're optimizing away the call to cp_parser_lookup_name, but
 		 we still need to do this.  */
+	      parser->object_scope = parser->context->object_type;
 	      parser->context->object_type = NULL_TREE;
 	      return identifier;
 	    }
@@ -33575,7 +33576,8 @@ cp_parser_pre_parsed_nested_name_specifier (cp_parser *parser)
   /* Set the scope from the stored value.  */
   parser->scope = saved_checks_value (check_value);
   parser->qualifying_scope = check_value->qualifying_scope;
-  parser->object_scope = NULL_TREE;
+  parser->object_scope = parser->context->object_type;
+  parser->context->object_type = NULL_TREE;
 }
 
 /* Consume tokens up through a non-nested END token.  Returns TRUE if we