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52066eae | 1 | // { dg-do compile { target c++14 } } |
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a5544970 | 3 | // Copyright (C) 2013-2019 Free Software Foundation, Inc. |
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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 | ||
c7cbb4da | 16 | // You should have received a copy of the GNU General Public License along |
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17 | // with this library; see the file COPYING3. If not see |
18 | // <http://www.gnu.org/licenses/>. | |
19 | ||
20 | #include <experimental/optional> | |
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21 | |
22 | struct value_type | |
23 | { | |
24 | int i; | |
25 | }; | |
26 | ||
27 | int main() | |
28 | { | |
29 | constexpr std::experimental::optional<value_type> o { value_type { 51 } }; | |
30 | constexpr value_type fallback { 3 }; | |
31 | static_assert( o.value_or(fallback).i == 51, "" ); | |
32 | static_assert( o.value_or(fallback).i == (*o).i, "" ); | |
33 | } |