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 auto size() const requires (!same_as<Bound, unreachable_sentinel_t>);
12
13#include <cassert>
14#include <iterator>
15#include <limits>
16#include <ranges>
17
18template <class T>
19concept has_size = requires(T&& view) {
20 { std::forward<T>(view).size() };
21};
22
23static_assert(has_size<std::ranges::repeat_view<int, int>>);
24static_assert(!has_size<std::ranges::repeat_view<int>>);
25static_assert(!has_size<std::ranges::repeat_view<int, std::unreachable_sentinel_t>>);
26
27constexpr bool test() {
28 {
29 std::ranges::repeat_view<int, int> rv(10, 20);
30 assert(rv.size() == 20);
31 }
32
33 {
34 constexpr int int_max = std::numeric_limits<int>::max();
35 std::ranges::repeat_view<int, int> rv(10, int_max);
36 assert(rv.size() == int_max);
37 }
38
39 return true;
40}
41
42int main(int, char**) {
43 test();
44 static_assert(test());
45
46 return 0;
47}
48

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