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

   1 // { dg-do compile { target c++11 } }
   2
   3 // 2007-05-02  Benjamin Kosnik  <bkoz@redhat.com>
   4 //
   5 // Copyright (C) 2007-2021 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12 //
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 #include <type_traits>
  23
  24 using std::conditional;
  25 using std::is_same;
  26
  27 typedef conditional<true, char, int>::type     test1_type;
  28 static_assert( is_same<test1_type, char>::value, "conditional<true, ...>" );
  29
  30 typedef conditional<false, char, int>::type     test2_type;
  31 static_assert( is_same<test2_type, int>::value, "conditional<false, ...>" );