| // { dg-do run { target c++14 } } |
| |
| // Copyright (C) 2013-2022 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 ); |
| } |
| } |