parser.c (cp_parser_check_for_invalid_template_id): tag_type parm.

	* parser.c (cp_parser_check_for_invalid_template_id): tag_type parm.
	(cp_parser_simple_type_specifier, cp_parser_class_head): Adjust.
	(cp_parser_elaborated_type_specifier): Adjust.
	* decl.c (duplicate_decls): Return error_mark_node on template
	mismatch.

From-SVN: r189025

gcc/cp/ChangeLog

 2012-06-27  Jason Merrill  <jason@redhat.com>
 
+	* parser.c (cp_parser_check_for_invalid_template_id): tag_type parm.
+	(cp_parser_simple_type_specifier, cp_parser_class_head): Adjust.
+	(cp_parser_elaborated_type_specifier): Adjust.
+	* decl.c (duplicate_decls): Return error_mark_node on template
+	mismatch.
+
 	PR c++/53563
 	* parser.c (cp_parser_template_id): Add tag_type parm.
 	(cp_parser_template_name): Likewise.

gcc/cp/decl.c

@@ -1463,6 +1463,7 @@ duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
 	    {
 	      error ("declaration of template %q#D", newdecl);
 	      error ("conflicts with previous declaration %q+#D", olddecl);
+	      return error_mark_node;
 	    }
 	  else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
 		   && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL

gcc/cp/parser.c

@@ -2278,7 +2278,7 @@ static bool cp_parser_check_type_definition
 static void cp_parser_check_for_definition_in_return_type
   (cp_declarator *, tree, location_t type_location);
 static void cp_parser_check_for_invalid_template_id
-  (cp_parser *, tree, location_t location);
+  (cp_parser *, tree, enum tag_types, location_t location);
 static bool cp_parser_non_integral_constant_expression
   (cp_parser *, non_integral_constant);
 static void cp_parser_diagnose_invalid_type_name
@@ -2551,7 +2551,9 @@ cp_parser_check_for_definition_in_return_type (cp_declarator *declarator,
 
 static void
 cp_parser_check_for_invalid_template_id (cp_parser* parser,
-					 tree type, location_t location)
+					 tree type,
+					 enum tag_types tag_type,
+					 location_t location)
 {
   cp_token_position start = 0;
 
@@ -2560,7 +2562,12 @@ cp_parser_check_for_invalid_template_id (cp_parser* parser,
       if (TYPE_P (type))
 	error_at (location, "%qT is not a template", type);
       else if (TREE_CODE (type) == IDENTIFIER_NODE)
-	error_at (location, "%qE is not a template", type);
+	{
+	  if (tag_type != none_type)
+	    error_at (location, "%qE is not a class template", type);
+	  else
+	    error_at (location, "%qE is not a template", type);
+	}
       else
 	error_at (location, "invalid template-id");
       /* Remember the location of the invalid "<".  */
@@ -13668,7 +13675,8 @@ cp_parser_simple_type_specifier (cp_parser* parser,
       /* There is no valid C++ program where a non-template type is
 	 followed by a "<".  That usually indicates that the user thought
 	 that the type was a template.  */
-      cp_parser_check_for_invalid_template_id (parser, type, token->location);
+      cp_parser_check_for_invalid_template_id (parser, type, none_type,
+					       token->location);
 
       return TYPE_NAME (type);
     }
@@ -13770,6 +13778,7 @@ cp_parser_simple_type_specifier (cp_parser* parser,
 	 followed by a "<".  That usually indicates that the user
 	 thought that the type was a template.  */
       cp_parser_check_for_invalid_template_id (parser, TREE_TYPE (type),
+					       none_type,
 					       token->location);
     }
 
@@ -14273,7 +14282,8 @@ cp_parser_elaborated_type_specifier (cp_parser* parser,
 
   /* A "<" cannot follow an elaborated type specifier.  If that
      happens, the user was probably trying to form a template-id.  */
-  cp_parser_check_for_invalid_template_id (parser, type, token->location);
+  cp_parser_check_for_invalid_template_id (parser, type, tag_type,
+					   token->location);
 
   return type;
 }
@@ -18429,6 +18439,7 @@ cp_parser_class_head (cp_parser* parser,
   if (id)
     {
       cp_parser_check_for_invalid_template_id (parser, id,
+					       class_key,
                                                type_start_token->location);
     }
   virt_specifiers = cp_parser_virt_specifier_seq_opt (parser);

gcc/testsuite/ChangeLog

 2012-06-27  Jason Merrill  <jason@redhat.com>
 
+	* g++.dg/cpp0x/override2.C: Adjust.
+	* g++.dg/template/error5.C: Adjust.
+	* g++.dg/parse/crash28.C: Adjust.
+
 	PR c++/53563
 	* g++.dg/parse/template27.C: New.
 	* g++.dg/template/crash74.C: Adjust expected output.

gcc/testsuite/g++.dg/cpp0x/override2.C

@@ -18,7 +18,7 @@ template <class T> struct B4 final {};
 
 template <class T> struct B5 final {};
 
-struct undeclared<int> final { }; // { dg-error "not a template" }
+struct undeclared<int> final { }; // { dg-error "not a class template" }
 
 struct D5 : B3<D5> {};
 

gcc/testsuite/g++.dg/parse/crash28.C

@@ -5,10 +5,10 @@
 // Origin:Andrew Pinski <pinskia@gcc.gnu.org>
 //        Volker Reichelt <reichelt@gcc.gnu.org>
 
-template <class _Tp> class insert_iterator<slist<_Tp> > {}; // { dg-error "not a template|not declared in this scope|expected unqualified-id|extra" }
+template <class _Tp> class insert_iterator<slist<_Tp> > {}; // { dg-error "not a class template|not declared in this scope|expected unqualified-id|extra" }
 template <class _Value> class insert_iterator<int > { // { dg-error "template" }
   hash_set<_Value>;
 };
 
-template<int> struct A<X<> > {}; // { dg-error "not a template|not declared in this scope|expected unqualified-id|extra" }
+template<int> struct A<X<> > {}; // { dg-error "not a class template|not declared in this scope|expected unqualified-id|extra" }
 struct A {};

gcc/testsuite/g++.dg/template/error5.C

 template <typename T>
-struct X<T*> { // { dg-error "not a template" }
+struct X<T*> { // { dg-error "not a class template" }
    typedef int Y;
 };
 
-extern struct Z<int> s; // { dg-error "not a template" }
+extern struct Z<int> s; // { dg-error "not a class template" }