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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_FOR_EACH_N_H10#define _LIBCPP___ALGORITHM_RANGES_FOR_EACH_N_H11 12#include <__algorithm/for_each_n.h>13#include <__algorithm/in_fun_result.h>14#include <__config>15#include <__functional/identity.h>16#include <__iterator/concepts.h>17#include <__iterator/incrementable_traits.h>18#include <__iterator/iterator_traits.h>19#include <__iterator/projected.h>20#include <__ranges/concepts.h>21#include <__utility/move.h>22 23#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)24# pragma GCC system_header25#endif26 27_LIBCPP_PUSH_MACROS28#include <__undef_macros>29 30#if _LIBCPP_STD_VER >= 2031 32_LIBCPP_BEGIN_NAMESPACE_STD33 34namespace ranges {35 36template <class _Iter, class _Func>37using for_each_n_result = in_fun_result<_Iter, _Func>;38 39struct __for_each_n {40 template <input_iterator _Iter, class _Proj = identity, indirectly_unary_invocable<projected<_Iter, _Proj>> _Func>41 _LIBCPP_HIDE_FROM_ABI constexpr for_each_n_result<_Iter, _Func>42 operator()(_Iter __first, iter_difference_t<_Iter> __count, _Func __func, _Proj __proj = {}) const {43 auto __last = std::__for_each_n(std::move(__first), __count, __func, __proj);44 return {std::move(__last), std::move(__func)};45 }46};47 48inline namespace __cpo {49inline constexpr auto for_each_n = __for_each_n{};50} // namespace __cpo51} // namespace ranges52 53_LIBCPP_END_NAMESPACE_STD54 55#endif // _LIBCPP_STD_VER >= 2056 57_LIBCPP_POP_MACROS58 59#endif // _LIBCPP___ALGORITHM_RANGES_FOR_EACH_N_H60