1 | //===----------------------------------------------------------------------===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | // UNSUPPORTED: c++03, c++11, c++14 |
10 | // <optional> |
11 | |
12 | // template <class T, class... Args> |
13 | // constexpr optional<T> make_optional(Args&&... args); |
14 | |
15 | // GCC crashes on this file, see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120577 |
16 | // XFAIL: gcc-15 |
17 | |
18 | #include <optional> |
19 | #include <string> |
20 | #include <memory> |
21 | #include <cassert> |
22 | |
23 | #include "test_macros.h" |
24 | |
25 | int main(int, char**) |
26 | { |
27 | { |
28 | constexpr auto opt = std::make_optional<int>('a'); |
29 | static_assert(*opt == int('a')); |
30 | } |
31 | { |
32 | std::string s = "123" ; |
33 | auto opt = std::make_optional<std::string>(s); |
34 | assert(*opt == "123" ); |
35 | } |
36 | { |
37 | std::unique_ptr<int> s = std::make_unique<int>(3); |
38 | auto opt = std::make_optional<std::unique_ptr<int>>(std::move(s)); |
39 | assert(**opt == 3); |
40 | assert(s == nullptr); |
41 | } |
42 | { |
43 | auto opt = std::make_optional<std::string>(4u, 'X'); |
44 | assert(*opt == "XXXX" ); |
45 | } |
46 | |
47 | return 0; |
48 | } |
49 | |