From: Jason Merrill <jason@redhat.com>
Date: Wed, 23 Jan 2008 05:11:58 +0000 (-0500)
Subject: re PR c++/28560 (Trouble with __attribute__ in template parameter)
X-Git-Tag: releases/gcc-4.3.0~457
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b2a7def5aba4da7615a1ea9ea79e869da76f13c6;p=thirdparty%2Fgcc.git

re PR c++/28560 (Trouble with __attribute__ in template parameter)

        PR c++/28560
        * decl.c (groktypename): Also ignore attributes on dependent
        possibly-class types.

From-SVN: r131755
---

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index f9971d4943d6..667f813b5947 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -9,6 +9,10 @@
 
 2008-01-22  Jason Merrill  <jason@redhat.com>
 
+	PR c++/28560
+	* decl.c (groktypename): Also ignore attributes on dependent 
+	possibly-class types.
+
 	PR c++/34912
 	* friend.c (do_friend): Check for prior declaration of a friend 
 	function of a local class.
diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c
index 338e1ed5676b..4640adfb1c61 100644
--- a/gcc/cp/decl.c
+++ b/gcc/cp/decl.c
@@ -3908,8 +3908,12 @@ groktypename (cp_decl_specifier_seq *type_specifiers,
   if (attrs)
     {
       if (CLASS_TYPE_P (type))
-	warning (OPT_Wattributes, "ignoring attributes applied to class type "
-		 "outside of definition");
+	warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
+		 "outside of definition", type);
+      else if (IS_AGGR_TYPE (type))
+	/* A template type parameter or other dependent type.  */
+	warning (OPT_Wattributes, "ignoring attributes applied to dependent "
+		 "type %qT without an associated declaration", type);
       else
 	cplus_decl_attributes (&type, attrs, 0);
     }
diff --git a/gcc/testsuite/g++.dg/ext/tmplattr8.C b/gcc/testsuite/g++.dg/ext/tmplattr8.C
new file mode 100644
index 000000000000..4b8707aa538d
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/tmplattr8.C
@@ -0,0 +1,8 @@
+// PR c++/28560
+
+template<typename> struct A {};
+
+template<int> struct B;
+
+template<int N> struct C :
+  A<typename B<N>::X __attribute__((unused))> {}; // { dg-warning "attribute" }