re PR c++/23797 (ICE on typename outside template)

cp:
	PR c++/23797
	* parser.c (cp_parser_functional_cast): Cope when TYPE is not a
	TYPE_DECL.  Use dependent_type_p to check type.
	* pt.c (uses_template_parms_p): Use dependent_type_p for a
	TYPE_DECL.
	(type_dependent_expression_p): Assert we've not been given a
	TYPE_DECL.
testsuite:
	PR c++/23797
	* g++.dg/other/typename8.C: New.

From-SVN: r105312

gcc/cp/ChangeLog

 2005-10-12  Nathan Sidwell  <nathan@codesourcery.com>
 
+	PR c++/23797
+	* parser.c (cp_parser_functional_cast): Cope when TYPE is not a
+	TYPE_DECL.  Use dependent_type_p to check type.
+	* pt.c (uses_template_parms_p): Use dependent_type_p for a
+	TYPE_DECL.
+	(type_dependent_expression_p): Assert we've not been given a
+	TYPE_DECL.
+
 	PR c++/21117
 	* decl.c (check_function_type): Correctly overwrite incomplete
 	return type with void type.

gcc/cp/parser.c

@@ -3956,6 +3956,7 @@ cp_parser_postfix_expression (cp_parser *parser, bool address_p, bool cast_p)
 
 	/* Consume the `typename' token.  */
 	cp_lexer_consume_token (parser->lexer);
+
 	/* Look for the optional `::' operator.  */
 	cp_parser_global_scope_opt (parser,
 				    /*current_scope_valid_p=*/false);
@@ -15355,8 +15356,10 @@ cp_parser_functional_cast (cp_parser* parser, tree type)
   cast = build_functional_cast (type, expression_list);
   /* [expr.const]/1: In an integral constant expression "only type
      conversions to integral or enumeration type can be used".  */
-  if (cast != error_mark_node && !type_dependent_expression_p (type)
-      && !INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (type)))
+  if (TREE_CODE (type) == TYPE_DECL)
+    type = TREE_TYPE (type);
+  if (cast != error_mark_node && !dependent_type_p (type)
+      && !INTEGRAL_OR_ENUMERATION_TYPE_P (type))
     {
       if (cp_parser_non_integral_constant_expression
 	  (parser, "a call to a constructor"))

gcc/cp/pt.c

@@ -4982,6 +4982,8 @@ uses_template_parms (tree t)
   else if (TREE_CODE (t) == TREE_LIST)
     dependent_p = (uses_template_parms (TREE_VALUE (t))
 		   || uses_template_parms (TREE_CHAIN (t)));
+  else if (TREE_CODE (t) == TYPE_DECL)
+    dependent_p = dependent_type_p (TREE_TYPE (t));
   else if (DECL_P (t)
 	   || EXPR_P (t)
 	   || TREE_CODE (t) == TEMPLATE_PARM_INDEX
@@ -12442,6 +12444,8 @@ type_dependent_expression_p (tree expression)
       return false;
     }
 
+  gcc_assert (TREE_CODE (expression) != TYPE_DECL);
+  
   return (dependent_type_p (TREE_TYPE (expression)));
 }
 

gcc/testsuite/ChangeLog

 2005-10-12  Nathan Sidwell  <nathan@codesourcery.com>
 
+	PR c++/23797
+	* g++.dg/other/typename8.C: New.
+
 	PR c++/21117
 	* g++.dg/other/return1.C: New.
 

gcc/testsuite/g++.dg/parse/typename8.C

+// Copyright (C) 2005 Free Software Foundation, Inc.
+// Contributed by Nathan Sidwell 12 Oct 2005 <nathan@codesourcery.com>
+
+// PR 23797:ICE
+// Origin:  Volker Reichelt <reichelt@gcc.gnu.org>
+
+struct A { typedef int X; };
+
+int i = typename A::X();