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 // UNSUPPORTED: libcpp-no-concepts
11 // UNSUPPORTED: libcpp-has-no-incomplete-ranges
12 
13 // sentinel() = default;
14 // constexpr explicit sentinel(sentinel_t<Base> end);
15 // constexpr sentinel(sentinel<!Const> s)
16 //   requires Const && convertible_to<sentinel_t<V>, sentinel_t<Base>>;
17 
18 #include <ranges>
19 #include <cassert>
20 
21 #include "test_macros.h"
22 #include "test_iterators.h"
23 #include "../types.h"
24 
25 constexpr bool test() {
26   int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8};
27 
28   {
29     // Test the default ctor.
30     std::ranges::take_view<MoveOnlyView> tv(MoveOnlyView{buffer}, 4);
31     assert(decltype(tv.end()){} == std::ranges::next(tv.begin(), 4));
32   }
33 
34   {
35     std::ranges::take_view<MoveOnlyView> nonConst(MoveOnlyView{buffer}, 5);
36     const std::ranges::take_view<MoveOnlyView> tvConst(MoveOnlyView{buffer}, 5);
37     auto sent1 = nonConst.end();
38     // Convert to const. Note, we cannot go the other way.
39     std::remove_cv_t<decltype(tvConst.end())> sent2 = sent1;
40 
41     assert(sent1 == std::ranges::next(tvConst.begin(), 5));
42     assert(sent2 == std::ranges::next(tvConst.begin(), 5));
43   }
44 
45   {
46     std::ranges::take_view<CopyableView> tv(CopyableView{buffer}, 6);
47     auto sw = sentinel_wrapper<int *>(buffer + 6);
48     using Sent = decltype(tv.end());
49     Sent sent = Sent(sw);
50     assert(sent.base().base() == sw.base());
51   }
52 
53   return true;
54 }
55 
56 int main(int, char**) {
57   test();
58   static_assert(test());
59 
60   return 0;
61 }
62