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52066eae | 1 | // { dg-do compile { target c++14 } } |
2b5ab1e4 | 2 | |
a945c346 | 3 | // Copyright (C) 2013-2024 Free Software Foundation, Inc. |
2b5ab1e4 MB |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
8 | // Free Software Foundation; either version 3, or (at your option) | |
9 | // any later version. | |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
16 | // You should have received a copy of the GNU General Public License along | |
17 | // with this library; see the file COPYING3. If not see | |
18 | // <http://www.gnu.org/licenses/>. | |
19 | ||
20 | #include <experimental/optional> | |
21 | #include <testsuite_hooks.h> | |
22 | ||
23 | int main() | |
24 | { | |
25 | // [20.5.5] In-place construction | |
26 | static_assert( std::is_same<decltype(std::experimental::in_place), const std::experimental::in_place_t>(), "" ); | |
27 | static_assert( std::is_empty<std::experimental::in_place_t>(), "" ); | |
28 | ||
29 | { | |
30 | constexpr std::experimental::optional<int> o { std::experimental::in_place }; | |
31 | static_assert( o, "" ); | |
32 | static_assert( *o == int {}, "" ); | |
33 | ||
34 | static_assert( !std::is_convertible<std::experimental::in_place_t, std::experimental::optional<int>>(), "" ); | |
35 | } | |
36 | ||
37 | { | |
38 | constexpr std::experimental::optional<int> o { std::experimental::in_place, 42 }; | |
39 | static_assert( o, "" ); | |
40 | static_assert( *o == 42, "" ); | |
41 | } | |
42 | } |