libstdc++-v3/testsuite/experimental/functional/value.cc

   1 // Copyright (C) 2014-2024 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-do compile { target c++14 } }
  19
  20 #include <experimental/functional>
  21
  22 // These tests are rather simple, the front-end tests already test
  23 // variable templates, and the library tests for the underlying
  24 // traits are more elaborate. These are just simple sanity tests.
  25
  26 int f(int);
  27
  28 using B = decltype(std::bind(f, std::placeholders::_1));
  29
  30 static_assert(!std::experimental::is_bind_expression_v<int>
  31               && !std::is_bind_expression<int>::value, "");
  32
  33 static_assert(std::experimental::is_bind_expression_v<B>
  34               && std::is_bind_expression<B>::value, "");
  35
  36 using PH = decltype(std::placeholders::_1);
  37
  38 static_assert(!std::experimental::is_placeholder_v<int>
  39               && !std::is_placeholder<int>::value, "");
  40
  41 static_assert(std::experimental::is_placeholder_v<PH>
  42               && std::is_placeholder<PH>::value, "");