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| 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-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef _LIBCPP___ALGORITHM_RANGES_SWAP_RANGES_H |
| 10 | #define _LIBCPP___ALGORITHM_RANGES_SWAP_RANGES_H |
| 11 | |
| 12 | #include <__algorithm/in_in_result.h> |
| 13 | #include <__algorithm/iterator_operations.h> |
| 14 | #include <__algorithm/swap_ranges.h> |
| 15 | #include <__config> |
| 16 | #include <__iterator/concepts.h> |
| 17 | #include <__iterator/iter_swap.h> |
| 18 | #include <__ranges/access.h> |
| 19 | #include <__ranges/concepts.h> |
| 20 | #include <__ranges/dangling.h> |
| 21 | #include <__utility/move.h> |
| 22 | |
| 23 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 24 | # pragma GCC system_header |
| 25 | #endif |
| 26 | |
| 27 | _LIBCPP_PUSH_MACROS |
| 28 | #include <__undef_macros> |
| 29 | |
| 30 | #if _LIBCPP_STD_VER >= 20 |
| 31 | |
| 32 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 33 | |
| 34 | namespace ranges { |
| 35 | |
| 36 | template <class _I1, class _I2> |
| 37 | using swap_ranges_result = in_in_result<_I1, _I2>; |
| 38 | |
| 39 | struct __swap_ranges { |
| 40 | template <input_iterator _I1, sentinel_for<_I1> _S1, input_iterator _I2, sentinel_for<_I2> _S2> |
| 41 | requires indirectly_swappable<_I1, _I2> |
| 42 | _LIBCPP_HIDE_FROM_ABI constexpr swap_ranges_result<_I1, _I2> |
| 43 | operator()(_I1 __first1, _S1 __last1, _I2 __first2, _S2 __last2) const { |
| 44 | auto __ret = std::__swap_ranges<_RangeAlgPolicy>( |
| 45 | std::move(__first1), std::move(__last1), std::move(__first2), std::move(__last2)); |
| 46 | return {std::move(__ret.first), std::move(__ret.second)}; |
| 47 | } |
| 48 | |
| 49 | template <input_range _R1, input_range _R2> |
| 50 | requires indirectly_swappable<iterator_t<_R1>, iterator_t<_R2>> |
| 51 | _LIBCPP_HIDE_FROM_ABI constexpr swap_ranges_result<borrowed_iterator_t<_R1>, borrowed_iterator_t<_R2>> |
| 52 | operator()(_R1&& __r1, _R2&& __r2) const { |
| 53 | return operator()(ranges::begin(__r1), ranges::end(__r1), ranges::begin(__r2), ranges::end(__r2)); |
| 54 | } |
| 55 | }; |
| 56 | |
| 57 | inline namespace __cpo { |
| 58 | inline constexpr auto swap_ranges = __swap_ranges{}; |
| 59 | } // namespace __cpo |
| 60 | } // namespace ranges |
| 61 | |
| 62 | _LIBCPP_END_NAMESPACE_STD |
| 63 | |
| 64 | #endif // _LIBCPP_STD_VER >= 20 |
| 65 | |
| 66 | _LIBCPP_POP_MACROS |
| 67 | |
| 68 | #endif // _LIBCPP___ALGORITHM_RANGES_SWAP_RANGES_H |
| 69 |
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