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& operator+=(difference_type n);
12
13#include <ranges>
14#include <cassert>
15#include <concepts>
16
17constexpr bool test() {
18 std::ranges::repeat_view<int> v(10);
19 using Iter = std::ranges::iterator_t<std::ranges::repeat_view<int>>;
20 auto iter1 = v.begin() + 10;
21 auto iter2 = v.begin() + 10;
22 assert(iter1 == iter2);
23 iter1 += 5;
24 assert(iter1 != iter2);
25 assert(iter1 == iter2 + 5);
26
27 static_assert(std::same_as<decltype(iter2 += 5), Iter&>);
28 assert(std::addressof(iter2) == std::addressof(iter2 += 5));
29
30 return true;
31}
32
33int main(int, char**) {
34 test();
35 static_assert(test());
36
37 return 0;
38}
39

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