re PR c++/57252 (GCC does not treat ref-qualified overload set as ambiguous)

	PR c++/57252
	* decl.c (decls_match): Compare ref-qualifiers.

From-SVN: r198841

gcc/cp/ChangeLog

+2013-05-13  Jason Merrill  <jason@redhat.com>
+
+	PR c++/57252
+	* decl.c (decls_match): Compare ref-qualifiers.
+
 2013-05-10  Jason Merrill  <jason@redhat.com>
 
 	PR c++/57196

gcc/cp/decl.c

@@ -1024,6 +1024,7 @@ decls_match (tree newdecl, tree olddecl)
 	  else
 	    types_match =
 	      compparms (p1, p2)
+	      && type_memfn_rqual (f1) == type_memfn_rqual (f2)
 	      && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl)) == NULL_TREE
 	          || comp_type_attributes (TREE_TYPE (newdecl),
 					   TREE_TYPE (olddecl)) != 0);

gcc/testsuite/g++.dg/cpp0x/ref-qual10.C

+// PR c++/57252
+// { dg-require-effective-target c++11 }
+
+struct foo {
+  void bar() & {}
+  void bar() && {}
+};
+
+int main()
+{
+  auto p = &foo::bar;		// { dg-error "" }
+  (foo{}.*p)();
+}