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

   1 // { dg-do compile }
   2 // { dg-options "-std=gnu++1y" }
   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 #include <type_traits>
  22 #include <cassert> //testsuite_hooks.h>
  23
  24 typedef std::integral_constant<int, 1>       ic_one;
  25 typedef std::integral_constant<int, 0>       ic_zero;
  26 typedef std::integral_constant<int, -1>      ic_minus_one;
  27
  28 typedef std::integral_constant<bool, true>   ic_true;
  29 typedef std::integral_constant<bool, false>  ic_false;
  30
  31 static_assert( ic_one{}() == 1, "1" );
  32 static_assert( ic_zero{}() == 0, "0" );
  33 static_assert( ic_minus_one{}() == -1, "-1" );
  34
  35 static_assert( ic_true{}() == true, "true" );
  36 static_assert( ic_false{}() == false, "false" );