| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| // UNSUPPORTED: libcpp-no-concepts |
| // UNSUPPORTED: libcpp-has-no-incomplete-ranges |
| |
| // std::ranges::borrowed_iterator_t; |
| |
| #include <ranges> |
| |
| #include <concepts> |
| #include <span> |
| #include <string> |
| #include <string_view> |
| #include <vector> |
| |
| static_assert(std::same_as<std::ranges::borrowed_iterator_t<std::string>, std::ranges::dangling>); |
| static_assert(std::same_as<std::ranges::borrowed_iterator_t<std::string&&>, std::ranges::dangling>); |
| static_assert(std::same_as<std::ranges::borrowed_iterator_t<std::vector<int> >, std::ranges::dangling>); |
| |
| static_assert(std::same_as<std::ranges::borrowed_iterator_t<std::string&>, std::string::iterator>); |
| static_assert(std::same_as<std::ranges::borrowed_iterator_t<std::string_view>, std::string_view::iterator>); |
| static_assert(std::same_as<std::ranges::borrowed_iterator_t<std::span<int> >, std::span<int>::iterator>); |
| |
| template <class T> |
| constexpr bool has_borrowed_iterator = requires { |
| typename std::ranges::borrowed_iterator_t<T>; |
| }; |
| |
| static_assert(!has_borrowed_iterator<int>); |