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--();
12// constexpr iterator operator--(int);
13
14#include <ranges>
15#include <cassert>
16
17constexpr bool test() {
18 using Iter = std::ranges::iterator_t<std::ranges::repeat_view<int>>;
19 std::ranges::repeat_view<int> rv(10);
20 auto iter = rv.begin() + 10;
21
22 assert(iter-- == rv.begin() + 10);
23 assert(--iter == rv.begin() + 8);
24
25 static_assert(std::same_as<decltype(iter--), Iter>);
26 static_assert(std::same_as<decltype(--iter), Iter&>);
27
28 return true;
29}
30
31int main(int, char**) {
32 test();
33 static_assert(test());
34
35 return 0;
36}
37

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