re PR c++/57532 (operator& broken when used on rvalues)

	PR c++/57532
	* parser.c (cp_parser_ref_qualifier_opt): Don't tentatively parse
	a ref-qualifier in C++98 mode.

From-SVN: r200842

gcc/cp/ChangeLog

 2013-07-09  Jason Merrill  <jason@redhat.com>
 
+	PR c++/57532
+	* parser.c (cp_parser_ref_qualifier_opt): Don't tentatively parse
+	a ref-qualifier in C++98 mode.
+
 	PR c++/57545
 	* pt.c (convert_nontype_argument) [INTEGER_CST]: Force the
 	argument to have the exact type of the parameter.

gcc/cp/parser.c

@@ -17374,6 +17374,10 @@ cp_parser_ref_qualifier_opt (cp_parser* parser)
 {
   cp_ref_qualifier ref_qual = REF_QUAL_NONE;
 
+  /* Don't try to parse bitwise '&' as a ref-qualifier (c++/57532).  */
+  if (cxx_dialect < cxx11 && cp_parser_parsing_tentatively (parser))
+    return ref_qual;
+
   while (true)
     {
       cp_ref_qualifier curr_ref_qual = REF_QUAL_NONE;

gcc/testsuite/g++.dg/parse/ref-qual2.C

+// PR c++/57532
+
+int main()
+{
+    return (int() & int());
+}