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 // friend constexpr iterator operator+(iterator i, difference_type n);
12 // friend constexpr iterator operator+(difference_type n, iterator i);
13
14 #include <ranges>
15 #include <cassert>
16 #include <concepts>
17
test()18 constexpr bool test() {
19 std::ranges::repeat_view<int> v(10);
20 using Iter = std::ranges::iterator_t<std::ranges::repeat_view<int>>;
21 auto iter = v.begin();
22 assert(iter + 5 == v.begin() + 5);
23 assert(5 + iter == v.begin() + 5);
24 assert(2 + iter == v.begin() + 2);
25 assert(3 + iter == v.begin() + 3);
26
27 static_assert(std::same_as<decltype(iter + 5), Iter>);
28 static_assert(std::same_as<decltype(5 + iter), Iter>);
29
30 return true;
31 }
32
main(int,char **)33 int main(int, char**) {
34 test();
35 static_assert(test());
36
37 return 0;
38 }
39