libstdc++-v3/testsuite/20_util/logical_traits/value.cc

   1 // { dg-do compile { target c++17 } }
   2 //
   3 // Copyright (C) 2015-2022 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
  22 void test01()
  23 {
  24   static_assert(std::negation<std::false_type>{});
  25   static_assert(!std::negation<std::true_type>{});
  26   static_assert(std::conjunction<>{});
  27   static_assert(!std::disjunction<>{});
  28   static_assert(std::conjunction<std::true_type>{});
  29   static_assert(!std::conjunction<std::false_type>{});
  30   static_assert(std::disjunction<std::true_type>{});
  31   static_assert(!std::disjunction<std::false_type>{});
  32   static_assert(std::conjunction<std::true_type, std::true_type>{});
  33   static_assert(!std::conjunction<std::true_type, std::false_type>{});
  34   static_assert(std::disjunction<std::false_type, std::true_type>{});
  35   static_assert(!std::disjunction<std::false_type, std::false_type>{});
  36   static_assert(std::conjunction<std::true_type, std::true_type,
  37                 std::true_type>{});
  38   static_assert(!std::conjunction<std::true_type, std::true_type,
  39                 std::false_type>{});
  40   static_assert(std::disjunction<std::false_type, std::false_type,
  41                 std::true_type>{});
  42   static_assert(!std::disjunction<std::false_type, std::false_type,
  43                 std::false_type>{});
  44 }