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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_FIND_IF_H10#define _LIBCPP___ALGORITHM_RANGES_FIND_IF_H11 12#include <__config>13#include <__functional/identity.h>14#include <__functional/invoke.h>15#include <__functional/ranges_operations.h>16#include <__iterator/concepts.h>17#include <__iterator/projected.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_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 _Ip, class _Sp, class _Pred, class _Proj>37_LIBCPP_HIDE_FROM_ABI constexpr _Ip __find_if_impl(_Ip __first, _Sp __last, _Pred& __pred, _Proj& __proj) {38 for (; __first != __last; ++__first) {39 if (std::invoke(__pred, std::invoke(__proj, *__first)))40 break;41 }42 return __first;43}44 45struct __find_if {46 template <input_iterator _Ip,47 sentinel_for<_Ip> _Sp,48 class _Proj = identity,49 indirect_unary_predicate<projected<_Ip, _Proj>> _Pred>50 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr _Ip51 operator()(_Ip __first, _Sp __last, _Pred __pred, _Proj __proj = {}) const {52 return ranges::__find_if_impl(std::move(__first), std::move(__last), __pred, __proj);53 }54 55 template <input_range _Rp, class _Proj = identity, indirect_unary_predicate<projected<iterator_t<_Rp>, _Proj>> _Pred>56 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Rp>57 operator()(_Rp&& __r, _Pred __pred, _Proj __proj = {}) const {58 return ranges::__find_if_impl(ranges::begin(__r), ranges::end(__r), __pred, __proj);59 }60};61 62inline namespace __cpo {63inline constexpr auto find_if = __find_if{};64} // namespace __cpo65} // namespace ranges66 67_LIBCPP_END_NAMESPACE_STD68 69#endif // _LIBCPP_STD_VER >= 2070 71_LIBCPP_POP_MACROS72 73#endif // _LIBCPP___ALGORITHM_RANGES_FIND_IF_H74