Yi Kong | 914f9e5 | 2022-07-20 16:55:58 +0800 | [diff] [blame] | 1 | // -*- C++ -*- |
| 2 | //===----------------------------------------------------------------------===// |
| 3 | // |
| 4 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 5 | // See https://llvm.org/LICENSE.txt for license information. |
| 6 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | #ifndef _LIBCPP___ALGORITHM_IN_IN_RESULT_H |
| 11 | #define _LIBCPP___ALGORITHM_IN_IN_RESULT_H |
| 12 | |
| 13 | #include <__concepts/convertible_to.h> |
| 14 | #include <__config> |
| 15 | #include <__utility/move.h> |
| 16 | |
| 17 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 18 | # pragma GCC system_header |
| 19 | #endif |
| 20 | |
| 21 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 22 | |
| 23 | #if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES) |
| 24 | |
| 25 | namespace ranges { |
| 26 | |
| 27 | template <class _I1, class _I2> |
| 28 | struct in_in_result { |
| 29 | _LIBCPP_NO_UNIQUE_ADDRESS _I1 in1; |
| 30 | _LIBCPP_NO_UNIQUE_ADDRESS _I2 in2; |
| 31 | |
| 32 | template <class _II1, class _II2> |
| 33 | requires convertible_to<const _I1&, _II1> && convertible_to<const _I2&, _II2> |
| 34 | _LIBCPP_HIDE_FROM_ABI constexpr |
| 35 | operator in_in_result<_II1, _II2>() const & { |
| 36 | return {in1, in2}; |
| 37 | } |
| 38 | |
| 39 | template <class _II1, class _II2> |
| 40 | requires convertible_to<_I1, _II1> && convertible_to<_I2, _II2> |
| 41 | _LIBCPP_HIDE_FROM_ABI constexpr |
| 42 | operator in_in_result<_II1, _II2>() && { |
| 43 | return {std::move(in1), std::move(in2)}; |
| 44 | } |
| 45 | }; |
| 46 | |
| 47 | } // namespace ranges |
| 48 | |
| 49 | #endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES) |
| 50 | |
| 51 | _LIBCPP_END_NAMESPACE_STD |
| 52 | |
| 53 | #endif // _LIBCPP___ALGORITHM_IN_IN_RESULT_H |