Hi!
When parsing static_cast (expression) part inside of template argument,
greater_than_is_operator_p isn't temporarily set and thus the parser
considers >> in C++11 there as end of the the template argument, despite
this appearing before terminating ).
Fixed thusly, bootstrapped/regtested on x86_64-linux and i686-linux, ok for
trunk/4.8?
2013-07-01 Jakub Jelinek <ja...@redhat.com>
PR c++/57771
* parser.c (cp_parser_postfix_expression) <case RID_STATCAST>
Temporarily set parser->greater_than_is_operator_p for
cp_parser_expression and restore from saved value afterwards.
* g++.dg/template/arg9.C: New test.
--- gcc/cp/parser.c.jj 2013-07-01 22:43:42.000000000 +0200
+++ gcc/cp/parser.c 2013-07-01 22:47:14.220634900 +0200
@@ -5576,11 +5576,18 @@ cp_parser_postfix_expression (cp_parser
/* Restore the old message. */
parser->type_definition_forbidden_message = saved_message;
+ bool saved_greater_than_is_operator_p
+ = parser->greater_than_is_operator_p;
+ parser->greater_than_is_operator_p = true;
+
/* And the expression which is being cast. */
cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
expression = cp_parser_expression (parser, /*cast_p=*/true, & idk);
cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
+ parser->greater_than_is_operator_p
+ = saved_greater_than_is_operator_p;
+
/* Only type conversions to integral or enumeration types
can be used in constant-expressions. */
if (!cast_valid_in_integral_constant_expression_p (type)
--- gcc/testsuite/g++.dg/template/arg9.C.jj 2013-07-01 22:52:22.780699584
+0200
+++ gcc/testsuite/g++.dg/template/arg9.C 2013-07-01 22:51:22.000000000
+0200
@@ -0,0 +1,8 @@
+// PR c++/57771
+// { dg-do compile }
+
+template <int N>
+struct S {};
+
+S <static_cast <int> (4>>2)> s1;
+S <reinterpret_cast <int> (4>>2)> s2;
Jakub
