From 15ff4345c4be1bb0de1766f58607fbe74325ec87 Mon Sep 17 00:00:00 2001
From: Paolo Carlini <paolo.carlini@oracle.com>
Date: Wed, 13 Mar 2013 11:44:32 +0000
Subject: [PATCH] re PR c++/56611 ([C++11] Template instantiation failure with
 variadic arguments and template aliases)

2013-03-13  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/56611
	* g++.dg/cpp0x/alias-decl-32.C: New.

From-SVN: r196631
---
 gcc/testsuite/ChangeLog                    |  5 +++++
 gcc/testsuite/g++.dg/cpp0x/alias-decl-32.C | 25 ++++++++++++++++++++++
 2 files changed, 30 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/cpp0x/alias-decl-32.C

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index f4af3d5c34c..9fa73bef3a7 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2013-03-13  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/56611
+	* g++.dg/cpp0x/alias-decl-32.C: New.
+
 2013-03-11  Jan Hubicka  <jh@suse.cz>
 
 	PR middle-end/56571
diff --git a/gcc/testsuite/g++.dg/cpp0x/alias-decl-32.C b/gcc/testsuite/g++.dg/cpp0x/alias-decl-32.C
new file mode 100644
index 00000000000..1a4797edebf
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/alias-decl-32.C
@@ -0,0 +1,25 @@
+// PR c++/56611
+// { dg-do compile { target c++11 } }
+
+template<class T> struct remove_reference     { typedef T type; };
+template<class T> struct remove_reference<T&> { typedef T type; };
+template<class T> T declval() { return T(); }
+
+int f(int, int){return 0;}
+struct Func{};
+
+template<class... Args> struct result1
+{
+  typedef decltype(f(declval<typename remove_reference<Args>::type>()...)) type;
+};
+
+template<class... Args> using result2
+= decltype(f(declval<typename remove_reference<Args>::type>()...));
+
+template<class Sig> struct R;
+template<class This, class... Args> struct R< This(Args...) > 
+{
+  typedef result2<Args...> type;
+};
+
+typedef R< Func(int, int) >::type R_type;