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 U, class... Args> |
13 | // constexpr optional<T> make_optional(initializer_list<U> il, 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 <cassert> |
19 | #include <memory> |
20 | #include <optional> |
21 | #include <string> |
22 | |
23 | #include "test_macros.h" |
24 | |
25 | struct TestT { |
26 | int x; |
27 | int size; |
28 | int *ptr; |
29 | constexpr TestT(std::initializer_list<int> il) |
30 | : x(*il.begin()), size(static_cast<int>(il.size())), ptr(nullptr) {} |
31 | constexpr TestT(std::initializer_list<int> il, int *p) |
32 | : x(*il.begin()), size(static_cast<int>(il.size())), ptr(p) {} |
33 | }; |
34 | |
35 | constexpr bool test() |
36 | { |
37 | { |
38 | auto opt = std::make_optional<TestT>({42, 2, 3}); |
39 | ASSERT_SAME_TYPE(decltype(opt), std::optional<TestT>); |
40 | assert(opt->x == 42); |
41 | assert(opt->size == 3); |
42 | assert(opt->ptr == nullptr); |
43 | } |
44 | { |
45 | int i = 42; |
46 | auto opt = std::make_optional<TestT>({42, 2, 3}, &i); |
47 | ASSERT_SAME_TYPE(decltype(opt), std::optional<TestT>); |
48 | assert(opt->x == 42); |
49 | assert(opt->size == 3); |
50 | assert(opt->ptr == &i); |
51 | } |
52 | return true; |
53 | } |
54 | |
55 | int main(int, char**) |
56 | { |
57 | test(); |
58 | static_assert(test()); |
59 | { |
60 | auto opt = std::make_optional<std::string>({'1', '2', '3'}); |
61 | assert(*opt == "123" ); |
62 | } |
63 | { |
64 | auto opt = std::make_optional<std::string>({'a', 'b', 'c'}, std::allocator<char>{}); |
65 | assert(*opt == "abc" ); |
66 | } |
67 | return 0; |
68 | } |
69 | |