| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| |
| // template<class T> |
| // concept borrowed_range; |
| |
| #include <ranges> |
| |
| struct NotRange { |
| int begin() const; |
| int end() const; |
| }; |
| |
| struct Range { |
| int *begin(); |
| int *end(); |
| }; |
| |
| struct ConstRange { |
| int *begin() const; |
| int *end() const; |
| }; |
| |
| struct BorrowedRange { |
| int *begin() const; |
| int *end() const; |
| }; |
| |
| template<> |
| inline constexpr bool std::ranges::enable_borrowed_range<BorrowedRange> = true; |
| |
| static_assert(!std::ranges::borrowed_range<NotRange>); |
| static_assert(!std::ranges::borrowed_range<NotRange&>); |
| static_assert(!std::ranges::borrowed_range<const NotRange>); |
| static_assert(!std::ranges::borrowed_range<const NotRange&>); |
| static_assert(!std::ranges::borrowed_range<NotRange&&>); |
| |
| static_assert(!std::ranges::borrowed_range<Range>); |
| static_assert( std::ranges::borrowed_range<Range&>); |
| static_assert(!std::ranges::borrowed_range<const Range>); |
| static_assert(!std::ranges::borrowed_range<const Range&>); |
| static_assert(!std::ranges::borrowed_range<Range&&>); |
| |
| static_assert(!std::ranges::borrowed_range<ConstRange>); |
| static_assert( std::ranges::borrowed_range<ConstRange&>); |
| static_assert(!std::ranges::borrowed_range<const ConstRange>); |
| static_assert( std::ranges::borrowed_range<const ConstRange&>); |
| static_assert(!std::ranges::borrowed_range<ConstRange&&>); |
| |
| static_assert( std::ranges::borrowed_range<BorrowedRange>); |
| static_assert( std::ranges::borrowed_range<BorrowedRange&>); |
| static_assert( std::ranges::borrowed_range<const BorrowedRange>); |
| static_assert( std::ranges::borrowed_range<const BorrowedRange&>); |
| static_assert( std::ranges::borrowed_range<BorrowedRange&&>); |