re PR c++/10479 (alignof and sizeof (and other expressions) in attributes does…

re PR c++/10479 (alignof and sizeof (and other expressions) in attributes does not compile inside template classes)

	PR c++/10479
	* parser.c (cp_parser_parenthesized_expression_list): Fold
	non-dependent expressions in attribute lists.

	PR c++/10479
	* g++.dg/ext/attrib16.C: New test.

From-SVN: r89135

gcc/cp/ChangeLog

+2004-10-16  Giovanni Bajo  <giovannibajo@gcc.gnu.org>
+
+	PR c++/10479
+	* parser.c (cp_parser_parenthesized_expression_list): Fold
+	non-dependent expressions in attribute lists.
+
 2004-10-15  Mark Mitchell  <mark@codesourcery.com>
 
 	PR c++/17042

gcc/cp/parser.c

@@ -4420,6 +4420,7 @@ cp_parser_parenthesized_expression_list (cp_parser* parser,
 					 bool *non_constant_p)
 {
   tree expression_list = NULL_TREE;
+  bool fold_expr_p = is_attribute_list;
   tree identifier = NULL_TREE;
 
   /* Assume all the expressions will be constant.  */
@@ -4462,6 +4463,9 @@ cp_parser_parenthesized_expression_list (cp_parser* parser,
 	    else
 	      expr = cp_parser_assignment_expression (parser);
 
+	    if (fold_expr_p)
+	      expr = fold_non_dependent_expr (expr);
+
 	     /* Add it to the list.  We add error_mark_node
 		expressions to the list, so that we can still tell if
 		the correct form for a parenthesized expression-list

gcc/testsuite/ChangeLog

+2004-10-16  Giovanni Bajo  <giovannibajo@gcc.gnu.org>
+
+	PR c++/10479
+	* g++.dg/ext/attrib16.C: New test.
+
 2004-10-15  Mark Mitchell  <mark@codesourcery.com>
 
 	PR c++/17042

gcc/testsuite/g++.dg/ext/attrib16.C

+// { dg-do compile }
+// Origin: <rguenth at tat dot physik dot uni-tuebingen dot de>
+// PR c++/10479: use of non dependent expressions in attributes in templates
+
+template <int i>
+struct foo2 {
+  float bar __attribute__((aligned(__alignof__(double))));
+};