add ObjC* class, category and protocol attribute parsers

gcc/c-family:

	* c-common.h (objc_start_class_interface): Adjust prototype.
	(objc_start_category_interface): Likewise.
	(objc_start_protocol): Likewise.
	* stub-objc.c (objc_start_protocol): Adjust for extra argument.
	(objc_start_class_interface): Likewise.
	(objc_start_category_interface): Likewise.

gcc/objc:

	* objc-act.c (objc_start_class_interface): Handle and ignore attributes.
	(objc_start_category_interface): Likewise.
	(objc_start_protocol): Likewise.

gcc/cp:

	* parser.c (cp_parser_objc_valid_prefix_attributes): New.
	(cp_parser_declaration): Parse prefix attributes for ObjC++.
	(cp_parser_objc_protocol_declaration): Handle attributes.
	(cp_parser_objc_class_interface): Likewise.
	(cp_parser_objc_declaration): Likewise.

gcc:

	* c-parser.c (c_parser_objc_class_definition): Adjust prototype.
	(c_parser_objc_protocol_definition): Likewise.
	(c_parser_external_declaration): Provide dummy attribute arguments.
	(c_parser_declaration_or_fndef): Parse prefix attributes for ObjC.
	(c_parser_objc_class_definition): Handle attributes.
	(c_parser_objc_protocol_definition): Likewise.

gcc/testsuite:

	* objc.dg/attributes: New.
	* objc.dg/attributes/attributes.exp: New.
	* objc.dg/attributes/class-attribute-1.m: New.
	* objc.dg/attributes/class-attribute-2.m: New
	* objc.dg/attributes/categ-attribute-1.m: New
	* objc.dg/attributes/categ-attribute-2.m: New
	* objc.dg/attributes/proto-attribute-1.m: New

	* obj-c++.dg/attributes: New.
	* obj-c++.dg/attributes/attributes.exp: New
	* obj-c++.dg/attributes/class-attribute-1.mm: New
	* obj-c++.dg/attributes/class-attribute-2.mm: New
	* obj-c++.dg/attributes/categ-attribute-1.mm: New
	* obj-c++.dg/attributes/categ-attribute-2.mm: New
	* obj-c++.dg/attributes/proto-attribute-1.mm: New

From-SVN: r164700

1 files changed, 57 insertions, 10 deletions

diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index 9385344..8f6ea25 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -2086,9 +2086,11 @@ static tree cp_parser_objc_selector
 static tree cp_parser_objc_protocol_refs_opt
   (cp_parser *);
 static void cp_parser_objc_declaration
-  (cp_parser *);
+  (cp_parser *, tree);
 static tree cp_parser_objc_statement
   (cp_parser *);
+static bool cp_parser_objc_valid_prefix_attributes
+  (cp_parser* parser, tree *attrib);
 
 /* Utility Routines */
 
@@ -9285,6 +9287,7 @@ cp_parser_declaration (cp_parser* parser)
   cp_token token2;
   int saved_pedantic;
   void *p;
+  tree attributes = NULL_TREE;
 
   /* Check for the `__extension__' keyword.  */
   if (cp_parser_extension_opt (parser, &saved_pedantic))
@@ -9362,7 +9365,11 @@ cp_parser_declaration (cp_parser* parser)
     cp_parser_namespace_definition (parser);
   /* Objective-C++ declaration/definition.  */
   else if (c_dialect_objc () && OBJC_IS_AT_KEYWORD (token1.keyword))
-    cp_parser_objc_declaration (parser);
+    cp_parser_objc_declaration (parser, NULL_TREE);
+  else if (c_dialect_objc ()
+	   && token1.keyword == RID_ATTRIBUTE
+	   && cp_parser_objc_valid_prefix_attributes (parser, &attributes))
+    cp_parser_objc_declaration (parser, attributes);
   /* We must have either a block declaration or a function
      definition.  */
   else
@@ -21739,7 +21746,7 @@ cp_parser_objc_class_ivars (cp_parser* parser)
 /* Parse an Objective-C protocol declaration.  */
 
 static void
-cp_parser_objc_protocol_declaration (cp_parser* parser)
+cp_parser_objc_protocol_declaration (cp_parser* parser, tree attributes)
 {
   tree proto, protorefs;
   cp_token *tok;
@@ -21768,7 +21775,7 @@ cp_parser_objc_protocol_declaration (cp_parser* parser)
     {
       proto = cp_parser_identifier (parser);
       protorefs = cp_parser_objc_protocol_refs_opt (parser);
-      objc_start_protocol (proto, protorefs);
+      objc_start_protocol (proto, protorefs, attributes);
       cp_parser_objc_method_prototype_list (parser);
     }
 }
@@ -21798,7 +21805,7 @@ cp_parser_objc_superclass_or_category (cp_parser *parser, tree *super,
 /* Parse an Objective-C class interface.  */
 
 static void
-cp_parser_objc_class_interface (cp_parser* parser)
+cp_parser_objc_class_interface (cp_parser* parser, tree attributes)
 {
   tree name, super, categ, protos;
 
@@ -21809,10 +21816,10 @@ cp_parser_objc_class_interface (cp_parser* parser)
 
   /* We have either a class or a category on our hands.  */
   if (categ)
-    objc_start_category_interface (name, categ, protos);
+    objc_start_category_interface (name, categ, protos, attributes);
   else
     {
-      objc_start_class_interface (name, super, protos);
+      objc_start_class_interface (name, super, protos, attributes);
       /* Handle instance variable declarations, if any.  */
       cp_parser_objc_class_ivars (parser);
       objc_continue_interface ();
@@ -21858,11 +21865,31 @@ cp_parser_objc_end_implementation (cp_parser* parser)
 /* Parse an Objective-C declaration.  */
 
 static void
-cp_parser_objc_declaration (cp_parser* parser)
+cp_parser_objc_declaration (cp_parser* parser, tree attributes)
 {
   /* Try to figure out what kind of declaration is present.  */
   cp_token *kwd = cp_lexer_peek_token (parser->lexer);
 
+  if (attributes)
+    switch (kwd->keyword)
+      {
+	case RID_AT_ALIAS:
+	case RID_AT_CLASS:
+	case RID_AT_END:
+	  error_at (kwd->location, "attributes may not be specified before"
+	            " the %<@%D%> Objective-C++ keyword",
+		    kwd->u.value);
+	  attributes = NULL;
+	  break;
+	case RID_AT_IMPLEMENTATION:
+	  warning_at (kwd->location, OPT_Wattributes,
+		      "prefix attributes are ignored before %<@%D%>",
+		      kwd->u.value);
+	  attributes = NULL;
+	default:
+	  break;
+      }
+
   switch (kwd->keyword)
     {
     case RID_AT_ALIAS:
@@ -21872,10 +21899,10 @@ cp_parser_objc_declaration (cp_parser* parser)
       cp_parser_objc_class_declaration (parser);
       break;
     case RID_AT_PROTOCOL:
-      cp_parser_objc_protocol_declaration (parser);
+      cp_parser_objc_protocol_declaration (parser, attributes);
       break;
     case RID_AT_INTERFACE:
-      cp_parser_objc_class_interface (parser);
+      cp_parser_objc_class_interface (parser, attributes);
       break;
     case RID_AT_IMPLEMENTATION:
       cp_parser_objc_class_implementation (parser);
@@ -22024,6 +22051,26 @@ cp_parser_objc_statement (cp_parser * parser) {
 
   return error_mark_node;
 }
+
+/* If we are compiling ObjC++ and we see an __attribute__ we neeed to 
+   look ahead to see if an objc keyword follows the attributes.  This
+   is to detect the use of prefix attributes on ObjC @interface and 
+   @protocol.  */
+
+static bool
+cp_parser_objc_valid_prefix_attributes (cp_parser* parser, tree *attrib)
+{
+  cp_lexer_save_tokens (parser->lexer);
+  *attrib = cp_parser_attributes_opt (parser);
+  gcc_assert (*attrib);
+  if (OBJC_IS_AT_KEYWORD (cp_lexer_peek_token (parser->lexer)->keyword))
+    {
+      cp_lexer_commit_tokens (parser->lexer);
+      return true;
+    }
+  cp_lexer_rollback_tokens (parser->lexer);
+  return false;  
+}
 
 /* OpenMP 2.5 parsing routines.  */