libstdc++-v3/testsuite/20_util/conditional/requirements/typedefs-2.cc

   1 // { dg-options "-std=gnu++1y" }
   2 // { dg-do compile }
   3
   4 // Copyright (C) 2013-2014 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
  22 // NB: This file is for testing type_traits with NO OTHER INCLUDES.
  23
  24 #include <type_traits>
  25
  26 using namespace std;
  27
  28 static_assert( is_same<typename conditional<true, long, void>::type,
  29                        conditional_t<true, long, void>>(),
  30                "conditional_t<true, ...>" );
  31 static_assert( is_same<typename conditional<false, long, void>::type,
  32                        conditional_t<false, long, void>>(),
  33                "conditional_t<false, ...>" );