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-has-no-incomplete-ranges
11 
12 // std::ranges::lazy_split_view::outer-iterator::value_type::end()
13 
14 #include <ranges>
15 
16 #include <cassert>
17 #include "../types.h"
18 
19 constexpr bool test() {
20   // `View` is a forward range.
21   {
22     CopyableView input("a");
23 
24     // Non-const.
25     {
26       SplitViewCopyable v(input, "b");
27       auto val = *v.begin();
28 
29       static_assert(std::same_as<decltype(val.end()), std::default_sentinel_t>);
30       static_assert(noexcept(val.end()));
31       [[maybe_unused]] auto e = val.end();
32     }
33 
34     // Const.
35     {
36       SplitViewCopyable v(input, "b");
37       const auto val = *v.begin();
38 
39       static_assert(std::same_as<decltype(val.end()), std::default_sentinel_t>);
40       static_assert(noexcept(val.end()));
41       [[maybe_unused]] auto e = val.end();
42     }
43   }
44 
45   // `View` is an input range.
46   {
47     InputView input("a");
48 
49     // Non-const.
50     {
51       SplitViewInput v(input, 'b');
52       auto val = *v.begin();
53 
54       static_assert(std::same_as<decltype(val.end()), std::default_sentinel_t>);
55       static_assert(noexcept(val.end()));
56       [[maybe_unused]] auto e = val.end();
57     }
58 
59     // Const.
60     {
61       SplitViewInput v(input, 'b');
62       const auto val = *v.begin();
63 
64       static_assert(std::same_as<decltype(val.end()), std::default_sentinel_t>);
65       static_assert(noexcept(val.end()));
66       [[maybe_unused]] auto e = val.end();
67     }
68   }
69 
70   return true;
71 }
72 
73 int main(int, char**) {
74   assert(test());
75   static_assert(test());
76 
77   return 0;
78 }
79