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// { dg-do compile { target c++14 } }
// Copyright (C) 2013-2021 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/>.
#include <experimental/optional>
#include <testsuite_hooks.h>
int main()
{
// [20.5.4.1] Constructors
{
constexpr std::experimental::optional<int> o;
static_assert( !o, "" );
}
{
constexpr std::experimental::optional<int> o {};
static_assert( !o, "" );
}
{
constexpr std::experimental::optional<int> o = {};
static_assert( !o, "" );
}
}
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