libstdc++-v3/testsuite/20_util/integral_constant/operator_value_type.cc

   1 // { dg-do compile { target c++11 } }
   2 //
   3 // Copyright (C) 2013-2019 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10 //
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 #include <type_traits>
  21 #include <cassert> //testsuite_hooks.h>
  22
  23 typedef std::integral_constant<int, 1>       ic_one;
  24 typedef std::integral_constant<int, 0>       ic_zero;
  25 typedef std::integral_constant<int, -1>      ic_minus_one;
  26
  27 typedef std::integral_constant<bool, true>   ic_true;
  28 typedef std::integral_constant<bool, false>  ic_false;
  29
  30 static_assert( ic_one() == 1, "" );
  31 static_assert( ic_zero() == 0, "" );
  32 static_assert( ic_minus_one() == -1, "" );
  33
  34 static_assert( ic_true() == true, "" );
  35 static_assert( ic_false() == false, "" );