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47df7e19 | 1 | // { dg-do run { target c++17 } } |
435e56fb | 2 | |
99dee823 | 3 | // Copyright (C) 2013-2021 Free Software Foundation, Inc. |
435e56fb VV |
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 <optional> | |
21 | #include <testsuite_hooks.h> | |
22 | ||
23 | #include <vector> | |
24 | ||
25 | int main() | |
26 | { | |
27 | // [20.5.5] In-place construction | |
435e56fb VV |
28 | { |
29 | std::optional<int> o { std::in_place }; | |
30 | VERIFY( o ); | |
31 | VERIFY( *o == int() ); | |
32 | ||
33 | static_assert( !std::is_convertible<std::in_place_t, std::optional<int>>(), "" ); | |
34 | } | |
35 | ||
36 | { | |
37 | std::optional<int> o { std::in_place, 42 }; | |
38 | VERIFY( o ); | |
39 | VERIFY( *o == 42 ); | |
40 | } | |
41 | ||
42 | { | |
43 | std::optional<std::vector<int>> o { std::in_place, 18, 4 }; | |
44 | VERIFY( o ); | |
45 | VERIFY( o->size() == 18 ); | |
46 | VERIFY( (*o)[17] == 4 ); | |
47 | } | |
48 | ||
49 | { | |
50 | std::optional<std::vector<int>> o { std::in_place, { 18, 4 } }; | |
51 | VERIFY( o ); | |
52 | VERIFY( o->size() == 2 ); | |
53 | VERIFY( (*o)[0] == 18 ); | |
54 | } | |
55 | ||
56 | { | |
57 | std::optional<std::vector<int>> o { std::in_place, { 18, 4 }, std::allocator<int> {} }; | |
58 | VERIFY( o ); | |
59 | VERIFY( o->size() == 2 ); | |
60 | VERIFY( (*o)[0] == 18 ); | |
61 | } | |
62 | } |