DR 176 permissiveness

	DR 176 permissiveness
gcc/
	* dwarf2out.c (get_context_die): Take TYPE_MAIN_VARIANT.
gcc/cp/
	* class.c (build_self_reference): Call set_underlying_type.
	* decl.c (check_elaborated_type_specifier): Don't complain about
	injected-class-name.
	(type_is_deprecated): Use TYPE_MAIN_VARIANT.
	* pt.c (convert_template_argument): Handle injected-class-name used
	as template template argument.
	* typeck2.c (abstract_virtuals_error): Use TYPE_MAIN_VARIANT.

From-SVN: r154354

5 files changed, 32 insertions, 0 deletions

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 6a30b67..c25d360 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,5 +1,14 @@
 2009-11-19  Jason Merrill  <jason@redhat.com>
 
+	DR 176 permissiveness
+	* class.c (build_self_reference): Call set_underlying_type.
+	* decl.c (check_elaborated_type_specifier): Don't complain about
+	injected-class-name.
+	(type_is_deprecated): Use TYPE_MAIN_VARIANT.
+	* pt.c (convert_template_argument): Handle injected-class-name used
+	as template template argument.
+	* typeck2.c (abstract_virtuals_error): Use TYPE_MAIN_VARIANT.
+
 	PR c++/561
 	* decl.c (static_fn_type): Split out...
 	(revert_static_member_fn): ...from here.
diff --git a/gcc/cp/class.c b/gcc/cp/class.c
index 3cf15fb..38eb73f 100644
--- a/gcc/cp/class.c
+++ b/gcc/cp/class.c
@@ -6513,6 +6513,7 @@ build_self_reference (void)
   DECL_CONTEXT (value) = current_class_type;
   DECL_ARTIFICIAL (value) = 1;
   SET_DECL_SELF_REFERENCE_P (value);
+  set_underlying_type (value);
 
   if (processing_template_decl)
     value = push_template_decl (value);
diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c
index 29e32c8..7f5a688 100644
--- a/gcc/cp/decl.c
+++ b/gcc/cp/decl.c
@@ -9787,6 +9787,10 @@ type_is_deprecated (tree type)
       && TREE_DEPRECATED (TYPE_NAME (type)))
     return type;
 
+  /* Do warn about using typedefs to a deprecated class.  */
+  if (TAGGED_TYPE_P (type) && type != TYPE_MAIN_VARIANT (type))
+    return type_is_deprecated (TYPE_MAIN_VARIANT (type));
+
   code = TREE_CODE (type);
 
   if (code == POINTER_TYPE || code == REFERENCE_TYPE
@@ -10608,6 +10612,7 @@ check_elaborated_type_specifier (enum tag_types tag_code,
      elaborated type specifier is the implicit typedef created when
      the type is declared.  */
   else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
+	   && !DECL_SELF_REFERENCE_P (decl)
 	   && tag_code != typename_type)
     {
       error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
diff --git a/gcc/cp/pt.c b/gcc/cp/pt.c
index 9c82e3c..c3b0f0e 100644
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -5370,6 +5370,22 @@ convert_template_argument (tree parm,
   if (TREE_CODE (arg) == TYPE_PACK_EXPANSION)
     arg = PACK_EXPANSION_PATTERN (arg);
 
+  /* Deal with an injected-class-name used as a template template arg.  */
+  if (requires_tmpl_type && CLASS_TYPE_P (arg))
+    {
+      tree t = maybe_get_template_decl_from_type_decl (TYPE_NAME (arg));
+      if (TREE_CODE (t) == TEMPLATE_DECL)
+	{
+	  if (complain & tf_warning_or_error)
+	    pedwarn (input_location, OPT_pedantic, "injected-class-name %qD"
+		     " used as template template argument", TYPE_NAME (arg));
+	  else if (flag_pedantic_errors)
+	    t = arg;
+
+	  arg = t;
+	}
+    }
+
   is_tmpl_type = 
     ((TREE_CODE (arg) == TEMPLATE_DECL
       && TREE_CODE (DECL_TEMPLATE_RESULT (arg)) == TYPE_DECL)
diff --git a/gcc/cp/typeck2.c b/gcc/cp/typeck2.c
index 6cb1152..a296caa 100644
--- a/gcc/cp/typeck2.c
+++ b/gcc/cp/typeck2.c
@@ -236,6 +236,7 @@ abstract_virtuals_error (tree decl, tree type)
      be abstract.  */
   if (!CLASS_TYPE_P (type))
     return 0;
+  type = TYPE_MAIN_VARIANT (type);
 
   /* If the type is incomplete, we register it within a hash table,
      so that we can check again once it is completed. This makes sense