re PR c++/49205 ([C++0x] Default constructor with pack expansion parameter not detected)

	PR c++/49205
	* call.c (sufficient_parms_p): Allow parameter packs too.

From-SVN: r175214

gcc/cp/ChangeLog

 2011-06-20  Jason Merrill  <jason@redhat.com>
 
+	PR c++/49205
+	* call.c (sufficient_parms_p): Allow parameter packs too.
+
 	PR c++/43321
 	* semantics.c (describable_type): Remove.
 	* cp-tree.h: Likewise.

gcc/cp/call.c

@@ -534,15 +534,16 @@ null_ptr_cst_p (tree t)
   return false;
 }
 
-/* Returns nonzero if PARMLIST consists of only default parms and/or
-   ellipsis.  */
+/* Returns nonzero if PARMLIST consists of only default parms,
+   ellipsis, and/or undeduced parameter packs.  */
 
 bool
 sufficient_parms_p (const_tree parmlist)
 {
   for (; parmlist && parmlist != void_list_node;
        parmlist = TREE_CHAIN (parmlist))
-    if (!TREE_PURPOSE (parmlist))
+    if (!TREE_PURPOSE (parmlist)
+	&& !PACK_EXPANSION_P (TREE_VALUE (parmlist)))
       return false;
   return true;
 }

gcc/testsuite/ChangeLog

 2011-06-20  Jason Merrill  <jason@redhat.com>
 
+	PR c++/49205
+	* g++.dg/cpp0x/variadic-default.C: New.
+
 	PR c++/43321
 	* g++.dg/cpp0x/auto26.C: New.
 

gcc/testsuite/g++.dg/cpp0x/variadic-default.C

+// PR c++/49205
+// { dg-options -std=c++0x }
+
+#include <initializer_list>
+
+struct A {
+  template<typename ...T> A(T...);
+  A(std::initializer_list<short>);
+  A(std::initializer_list<long>);
+};
+
+A a{};