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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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___ALGORITHM_RANGES_COPY_N_H10#define _LIBCPP___ALGORITHM_RANGES_COPY_N_H11 12#include <__algorithm/copy_n.h>13#include <__algorithm/in_out_result.h>14#include <__algorithm/iterator_operations.h>15#include <__config>16#include <__iterator/concepts.h>17#include <__iterator/incrementable_traits.h>18#include <__utility/move.h>19 20#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)21# pragma GCC system_header22#endif23 24_LIBCPP_PUSH_MACROS25#include <__undef_macros>26 27_LIBCPP_BEGIN_NAMESPACE_STD28 29#if _LIBCPP_STD_VER >= 2030 31namespace ranges {32 33template <class _Ip, class _Op>34using copy_n_result = in_out_result<_Ip, _Op>;35 36struct __copy_n {37 template <input_iterator _Ip, weakly_incrementable _Op>38 requires indirectly_copyable<_Ip, _Op>39 _LIBCPP_HIDE_FROM_ABI constexpr copy_n_result<_Ip, _Op>40 operator()(_Ip __first, iter_difference_t<_Ip> __n, _Op __result) const {41 auto __res = std::__copy_n<_RangeAlgPolicy>(std::move(__first), __n, std::move(__result));42 return {std::move(__res.first), std::move(__res.second)};43 }44};45 46inline namespace __cpo {47inline constexpr auto copy_n = __copy_n{};48} // namespace __cpo49} // namespace ranges50 51#endif // _LIBCPP_STD_VER >= 2052 53_LIBCPP_END_NAMESPACE_STD54 55_LIBCPP_POP_MACROS56 57#endif // _LIBCPP___ALGORITHM_RANGES_COPY_N_H58