37 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++17, c++2010 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