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 using Iter = std::ranges::iterator_t<std::ranges::repeat_view<int>>;
19 std::ranges::repeat_view<int> v(10);
20 auto iter = v.begin() + 10;
21 iter -= 5;
22 assert(iter == v.begin() + 5);
23
24 static_assert(std::same_as<decltype(iter -= 5), Iter&>);
25
26 return true;
27}
28
29int main(int, char**) {
30 test();
31 static_assert(test());
32
33 return 0;
34}
35

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