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: gcc-10
12 // UNSUPPORTED: libcpp-has-no-incomplete-ranges
13 
14 // sentinel() = default;
15 // constexpr explicit sentinel(sentinel_t<Base> end);
16 // constexpr sentinel(sentinel<!Const> s)
17 //   requires Const && convertible_to<sentinel_t<V>, sentinel_t<Base>>;
18 
19 #include <ranges>
20 #include <cassert>
21 
22 #include "test_macros.h"
23 #include "test_iterators.h"
24 #include "../types.h"
25 
26 constexpr bool test() {
27   int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8};
28   auto sw = sentinel_wrapper<int *>(buffer + 8); // Note: not 4, but that's OK.
29 
30   {
31     const std::ranges::take_view<ContiguousView> tv(ContiguousView{buffer}, 4);
32     assert(tv.end().base().base() == sw.base());
33     ASSERT_SAME_TYPE(decltype(tv.end().base()), sentinel_wrapper<int *>);
34   }
35 
36   {
37     std::ranges::take_view<ContiguousView> tv(ContiguousView{buffer}, 4);
38     assert(tv.end().base().base() == sw.base());
39     ASSERT_SAME_TYPE(decltype(tv.end().base()), sentinel_wrapper<int *>);
40   }
41 
42   return true;
43 }
44 
45 int main(int, char**) {
46   test();
47   static_assert(test());
48 
49   return 0;
50 }
51