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

   1 // { dg-options "-std=gnu++17" }
   2 // { dg-do compile { target c++17 } }
   3 //
   4 // Copyright (C) 2015-2021 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
  23 void test01()
  24 {
  25   static_assert(std::negation<std::false_type>{});
  26   static_assert(!std::negation<std::true_type>{});
  27   static_assert(std::conjunction<>{});
  28   static_assert(!std::disjunction<>{});
  29   static_assert(std::conjunction<std::true_type>{});
  30   static_assert(!std::conjunction<std::false_type>{});
  31   static_assert(std::disjunction<std::true_type>{});
  32   static_assert(!std::disjunction<std::false_type>{});
  33   static_assert(std::conjunction<std::true_type, std::true_type>{});
  34   static_assert(!std::conjunction<std::true_type, std::false_type>{});
  35   static_assert(std::disjunction<std::false_type, std::true_type>{});
  36   static_assert(!std::disjunction<std::false_type, std::false_type>{});
  37   static_assert(std::conjunction<std::true_type, std::true_type,
  38                 std::true_type>{});
  39   static_assert(!std::conjunction<std::true_type, std::true_type,
  40                 std::false_type>{});
  41   static_assert(std::disjunction<std::false_type, std::false_type,
  42                 std::true_type>{});
  43   static_assert(!std::disjunction<std::false_type, std::false_type,
  44                 std::false_type>{});
  45 }