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_;
TakesTwoIntsTakesTwoInts23 constexpr TakesTwoInts(int a, int b) : a_(a), b_(b) {}
24 };
25
test()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
main(int,char **)43 int main(int, char**) {
44 test();
45 static_assert(test());
46
47 return 0;
48 }
49