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 iterator begin() const;
12
13 #include <ranges>
14 #include <cassert>
15 #include <concepts>
16
test()17 constexpr bool test() {
18 // Test unbound && non-const view
19 {
20 std::ranges::repeat_view<int> rv(0);
21 std::same_as<std::ranges::iterator_t<decltype(rv)>> decltype(auto) iter = rv.begin();
22 assert(*iter == 0);
23 }
24
25 // Test unbound && const view
26 {
27 const std::ranges::repeat_view<int> rv(0);
28 std::same_as<std::ranges::iterator_t<decltype(rv)>> decltype(auto) iter = rv.begin();
29 assert(*iter == 0);
30 }
31
32 // Test bound && non-const view
33 {
34 std::ranges::repeat_view<int, int> rv(1024, 10);
35 std::same_as<std::ranges::iterator_t<decltype(rv)>> decltype(auto) iter = rv.begin();
36 assert(*iter == 1024);
37 }
38
39 // Test bound && const view
40 {
41 const std::ranges::repeat_view<int, long long> rv(1024, 10);
42 std::same_as<std::ranges::iterator_t<decltype(rv)>> decltype(auto) iter = rv.begin();
43 assert(*iter == 1024);
44 }
45
46 return true;
47 }
48
main(int,char **)49 int main(int, char**) {
50 test();
51 static_assert(test());
52
53 return 0;
54 }
55