re PR c++/43509 ([C++0x] ICE in constructor_name_p, at cp/name-lookup.c:1809)

PR c++/43509
	* parser.c (cp_parser_qualifying_entity): Do accept enum names in
	c++0x mode, but not other type-names.

From-SVN: r157765

gcc/cp/ChangeLog

@@ -1,3 +1,9 @@
+2010-03-26  Jason Merrill  <jason@redhat.com>
+
+	PR c++/43509
+	* parser.c (cp_parser_qualifying_entity): Do accept enum names in
+	c++0x mode, but not other type-names.
+
 2010-03-26  Dodji Seketeli  <dodji@redhat.com>
 
 	PR c++/43327

gcc/cp/parser.c

@@ -4441,6 +4441,16 @@ cp_parser_qualifying_entity (cp_parser *parser,
      
       /* Parse a typedef-name or enum-name.  */
       scope = cp_parser_nonclass_name (parser);
+
+      /* "If the name found does not designate a namespace or a class,
+	 enumeration, or dependent type, the program is ill-formed."
+
+         We cover classes and dependent types above and namespaces below,
+         so this code is only looking for enums.  */
+      if (!scope || TREE_CODE (scope) != TYPE_DECL
+	  || TREE_CODE (TREE_TYPE (scope)) != ENUMERAL_TYPE)
+	cp_parser_simulate_error (parser);
+
       successful_parse_p = cp_parser_parse_definitely (parser);
     }
   /* If that didn't work, try for a namespace-name.  */

gcc/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2010-03-26  Jason Merrill  <jason@redhat.com>
+
+	PR c++/43509
+	* g++.dg/cpp0x/parse1.C: New.
+
 2010-03-26  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/43524

gcc/testsuite/g++.dg/cpp0x/parse1.C

@@ -0,0 +1,5 @@
+// PR c++/43509
+// { dg-options "-std=c++0x" }
+
+typedef int B;			// { dg-error "" }
+B::B() {}			// { dg-error "" }