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// { dg-do run { target c++14 } }
// Copyright (C) 2013-2019 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/>.
#include <experimental/optional>
#include <testsuite_hooks.h>
#include <vector>
int main()
{
// [20.5.5] In-place construction
static_assert( std::is_same<decltype(std::experimental::in_place), const std::experimental::in_place_t>(), "" );
static_assert( std::is_empty<std::experimental::in_place_t>(), "" );
{
std::experimental::optional<int> o { std::experimental::in_place };
VERIFY( o );
VERIFY( *o == int() );
static_assert( !std::is_convertible<std::experimental::in_place_t, std::experimental::optional<int>>(), "" );
}
{
std::experimental::optional<int> o { std::experimental::in_place, 42 };
VERIFY( o );
VERIFY( *o == 42 );
}
{
std::experimental::optional<std::vector<int>> o { std::experimental::in_place, 18, 4 };
VERIFY( o );
VERIFY( o->size() == 18 );
VERIFY( (*o)[17] == 4 );
}
{
std::experimental::optional<std::vector<int>> o { std::experimental::in_place, { 18, 4 } };
VERIFY( o );
VERIFY( o->size() == 2 );
VERIFY( (*o)[0] == 18 );
}
{
std::experimental::optional<std::vector<int>> o { std::experimental::in_place, { 18, 4 }, std::allocator<int> {} };
VERIFY( o );
VERIFY( o->size() == 2 );
VERIFY( (*o)[0] == 18 );
}
}
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