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diff --git a/libstdc++-v3/testsuite/20_util/decay/requirements/typedefs.cc b/libstdc++-v3/testsuite/20_util/decay/requirements/typedefs.cc
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+++ b/libstdc++-v3/testsuite/20_util/decay/requirements/typedefs.cc
@@ -0,0 +1,52 @@
+// { dg-options "-std=gnu++0x" }
+
+// 2007-05-03  Benjamin Kosnik  <bkoz@redhat.com>
+//
+// Copyright (C) 2007, 2009 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <cstdlib>
+#include <type_traits>
+#include <testsuite_hooks.h>
+
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+  using std::decay;
+  using std::is_same;
+
+  // Positive tests.
+  typedef decay<bool>::type     	test1_type;
+  VERIFY( (is_same<test1_type, bool>::value) );
+
+  // NB: DR 705.
+  typedef decay<const int>::type  	test2_type;
+  VERIFY( (is_same<test2_type, int>::value) );
+
+  typedef decay<int[4]>::type     	test3_type;
+  VERIFY( (is_same<test3_type, std::remove_extent<int[4]>::type*>::value) );
+
+  typedef void (fn_type) ();
+  typedef decay<fn_type>::type  	test4_type;
+  VERIFY( (is_same<test4_type, std::add_pointer<fn_type>::type>::value) );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}