Retro68/gcc/libstdc++-v3/testsuite/20_util/hash/nullptr.cc
Wolfgang Thaller 6fbf4226da gcc-9.1
2019-06-20 20:10:10 +02:00

38 lines
1.1 KiB
C++

// Copyright (C) 2019 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// { dg-options "-std=gnu++17" }
// { dg-do run { target c++17 } }
#include <functional>
#include <testsuite_hooks.h>
void
test01()
{
auto h1 = std::hash<std::nullptr_t>{}(nullptr);
static_assert(std::is_same_v<decltype(h1), std::size_t>);
auto h2 = std::hash<std::nullptr_t>{}(nullptr);
VERIFY( h1 == h2 );
}
int
main()
{
test01();
}