39 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// 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 18constexpr 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 33int main(int, char**) {34 test();35 static_assert(test());36 37 return 0;38}39