re PR c++/56611 ([C++11] Template instantiation failure with variadic arguments…

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

+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

gcc/testsuite/g++.dg/cpp0x/alias-decl-32.C

+// 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;