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 // constexpr explicit sentinel(Parent& parent);
12
13 #include <cassert>
14 #include <ranges>
15
16 #include "test_macros.h"
17 #include "../types.h"
18
test()19 constexpr bool test() {
20 int buffer[4][4] = {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}, {13, 14, 15, 16}};
21
22 CopyableChild children[4] = {CopyableChild(buffer[0]), CopyableChild(buffer[1]), CopyableChild(buffer[2]), CopyableChild(buffer[3])};
23 CopyableParent parent{children};
24 std::ranges::join_view jv(parent);
25 std::ranges::sentinel_t<decltype(jv)> sent(jv);
26 assert(sent == std::ranges::next(jv.begin(), 16));
27
28 return true;
29 }
30
main(int,char **)31 int main(int, char**) {
32 test();
33 static_assert(test());
34
35 {
36 // Test explicitness.
37 using Parent = std::ranges::join_view<ParentView<ChildView>>;
38 static_assert( std::is_constructible_v<std::ranges::sentinel_t<Parent>, Parent&>);
39 static_assert(!std::is_convertible_v<std::ranges::sentinel_t<Parent>, Parent&>);
40 }
41
42 return 0;
43 }
44