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, c++17 |
10 | |
11 | // template<class... Args> |
12 | // requires constructible_from<T, Args...> |
13 | // constexpr explicit single_view(in_place_t, Args&&... args); |
14 | |
15 | #include <cassert> |
16 | #include <ranges> |
17 | #include <utility> |
18 | |
19 | #include "test_macros.h" |
20 | |
21 | struct TakesTwoInts { |
22 | int a_, b_; |
23 | constexpr TakesTwoInts(int a, int b) : a_(a), b_(b) {} |
24 | }; |
25 | |
26 | constexpr bool test() { |
27 | { |
28 | std::ranges::single_view<TakesTwoInts> sv(std::in_place, 1, 2); |
29 | assert(sv.data()->a_ == 1); |
30 | assert(sv.data()->b_ == 2); |
31 | assert(sv.size() == 1); |
32 | } |
33 | { |
34 | const std::ranges::single_view<TakesTwoInts> sv(std::in_place, 1, 2); |
35 | assert(sv.data()->a_ == 1); |
36 | assert(sv.data()->b_ == 2); |
37 | assert(sv.size() == 1); |
38 | } |
39 | |
40 | return true; |
41 | } |
42 | |
43 | int main(int, char**) { |
44 | test(); |
45 | static_assert(test()); |
46 | |
47 | return 0; |
48 | } |
49 | |