1// { dg-options "-std=gnu++14" }
2// { dg-do compile }
3
4// Copyright (C) 2013-2015 Free Software Foundation, Inc.
5//
6// This file is part of the GNU ISO C++ Library.  This library is free
7// software; you can redistribute it and/or modify it under the
8// terms of the GNU General Public License as published by the
9// Free Software Foundation; either version 3, or (at your option)
10// any later version.
11//
12// This library is distributed in the hope that it will be useful,
13// but WITHOUT ANY WARRANTY; without even the implied warranty of
14// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15// GNU General Public License for more details.
16//
17// You should have received a copy of the GNU General Public License along
18// with this library; see the file COPYING3.  If not see
19// <http://www.gnu.org/licenses/>.
20
21#include <type_traits>
22
23using namespace std;
24
25template<typename Trait, typename Result>
26  using test = is_same<typename Trait::type, Result>;
27
28static_assert( test<make_signed<const int>, make_signed_t<const int>>(),
29               "make_signed_t<const int>" );
30
31static_assert( test<make_signed<unsigned>, make_signed_t<unsigned>>(),
32               "make_signed_t<unsigned>" );
33
34static_assert( test<make_signed<char>, make_signed_t<char>>(),
35               "make_signed_t<char>" );
36