[C++ Patch] PR 58707

[Paolo Carlini]

Hi,

in order to fix this parsing issue with '>' between square brackets, it 
seems we have simply to use the parser->greater_than_is_operator_p 
mechanism. Tested x86_64-linux.

Thanks,
Paolo.

PS: Even if the testcase uses a constexpr array I don't think we need to 
special case c++11 vs c++98. Neither wrap only the cp_parser_expression 
call.

///////////////////////
/cp
2013-10-15  Paolo Carlini  <paolo.carl...@oracle.com>

        PR c++/58707
        * parser.c (cp_parser_postfix_open_square_expression): Set
        parser->greater_than_is_operator_p for the argument.

/testsuite
2013-10-15  Paolo Carlini  <paolo.carl...@oracle.com>

        PR c++/58707
        * g++.dg/cpp0x/pr58707.C: New.
Index: cp/parser.c
===================================================================
--- cp/parser.c (revision 203587)
+++ cp/parser.c (working copy)
@@ -6231,10 +6231,14 @@ cp_parser_postfix_open_square_expression (cp_parse
 {
   tree index = NULL_TREE;
   location_t loc = cp_lexer_peek_token (parser->lexer)->location;
+  bool saved_greater_than_is_operator_p;
 
   /* Consume the `[' token.  */
   cp_lexer_consume_token (parser->lexer);
 
+  saved_greater_than_is_operator_p = parser->greater_than_is_operator_p;
+  parser->greater_than_is_operator_p = true;
+
   /* Parse the index expression.  */
   /* ??? For offsetof, there is a question of what to allow here.  If
      offsetof is not being used in an integral constant expression context,
@@ -6278,6 +6282,8 @@ cp_parser_postfix_open_square_expression (cp_parse
        index = cp_parser_expression (parser, /*cast_p=*/false, NULL);
     }
 
+  parser->greater_than_is_operator_p = saved_greater_than_is_operator_p;
+
   /* Look for the closing `]'.  */
   cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
 
Index: testsuite/g++.dg/cpp0x/pr58707.C
===================================================================
--- testsuite/g++.dg/cpp0x/pr58707.C    (revision 0)
+++ testsuite/g++.dg/cpp0x/pr58707.C    (working copy)
@@ -0,0 +1,6 @@
+// PR c++/58707
+// { dg-do compile { target c++11 } }
+
+template<int i> class TC { };
+constexpr int foo[] = { 42 };
+TC<foo[0 > 1]> bar;