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From 477084b940a43a7f5bdb411e422a736c1f356c6f Mon Sep 17 00:00:00 2001
From: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri, 20 May 2011 19:02:08 +0000
Subject: [PATCH] PR c++/48736
* pt.c (tsubst_copy_and_build): Handle substitution of a pack
expansion producing another expansion.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_6-branch@173971 138bc75d-0d04-0410-961f-82ee72b054a4
index e1ddf84..d49fe6b 100644
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -13221,7 +13221,8 @@ tsubst_copy_and_build (tree t,
ce->value = tsubst_pack_expansion (ce->value, args, complain,
in_decl);
- if (ce->value == error_mark_node)
+ if (ce->value == error_mark_node
+ || PACK_EXPANSION_P (ce->value))
;
else if (TREE_VEC_LENGTH (ce->value) == 1)
/* Just move the argument into place. */
new file mode 100644
index 0000000..3ad5af4
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/variadic108.C
@@ -0,0 +1,10 @@
+// PR c++/48736
+// { dg-options -std=c++0x }
+
+template<class T>
+T&& create();
+
+template<class T, class... Args,
+ class = decltype(T{create<Args>()...}) // Line X
+>
+char f(int);
--
1.7.0.4
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