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, c++20
10
11// constexpr unreachable_sentinel_t end() const noexcept;
12// constexpr iterator end() const requires (!same_as<Bound, unreachable_sentinel_t>);
13
14#include <ranges>
15#include <cassert>
16#include <concepts>
17#include <iterator>
18
19constexpr bool test() {
20 // bound
21 {
22 std::ranges::repeat_view<int, int> rv(0, 10);
23 assert(rv.begin() + 10 == rv.end());
24 std::same_as<std::ranges::iterator_t<decltype(rv)>> decltype(auto) iter = rv.end();
25 static_assert(std::same_as<decltype(*iter), const int&>);
26 for (const auto& i : rv) {
27 assert(i == 0);
28 }
29 }
30
31 // unbound
32 {
33 std::ranges::repeat_view<int> rv(0);
34 assert(rv.begin() + 10 != rv.end());
35 static_assert(std::same_as<decltype(rv.end()), std::unreachable_sentinel_t>);
36 static_assert(noexcept(rv.end()));
37 for (const auto& i : rv | std::views::take(10)) {
38 assert(i == 0);
39 }
40 }
41 return true;
42}
43
44int main(int, char**) {
45 test();
46 static_assert(test());
47
48 return 0;
49}
50

source code of libcxx/test/std/ranges/range.factories/range.repeat.view/end.pass.cpp