66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
// { dg-do run { target c++14 } }
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// Copyright (C) 2013-2018 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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#include <experimental/optional>
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#include <testsuite_hooks.h>
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#include <vector>
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int main()
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{
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// [20.5.5] In-place construction
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static_assert( std::is_same<decltype(std::experimental::in_place), const std::experimental::in_place_t>(), "" );
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static_assert( std::is_empty<std::experimental::in_place_t>(), "" );
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{
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std::experimental::optional<int> o { std::experimental::in_place };
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VERIFY( o );
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VERIFY( *o == int() );
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static_assert( !std::is_convertible<std::experimental::in_place_t, std::experimental::optional<int>>(), "" );
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}
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{
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std::experimental::optional<int> o { std::experimental::in_place, 42 };
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VERIFY( o );
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VERIFY( *o == 42 );
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}
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{
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std::experimental::optional<std::vector<int>> o { std::experimental::in_place, 18, 4 };
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VERIFY( o );
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VERIFY( o->size() == 18 );
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VERIFY( (*o)[17] == 4 );
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}
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{
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std::experimental::optional<std::vector<int>> o { std::experimental::in_place, { 18, 4 } };
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VERIFY( o );
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VERIFY( o->size() == 2 );
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VERIFY( (*o)[0] == 18 );
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}
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{
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std::experimental::optional<std::vector<int>> o { std::experimental::in_place, { 18, 4 }, std::allocator<int> {} };
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VERIFY( o );
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VERIFY( o->size() == 2 );
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VERIFY( (*o)[0] == 18 );
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}
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}
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