181ad6265SDimitry Andric //===----------------------------------------------------------------------===// 281ad6265SDimitry Andric // 381ad6265SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 481ad6265SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 581ad6265SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 681ad6265SDimitry Andric // 781ad6265SDimitry Andric //===----------------------------------------------------------------------===// 881ad6265SDimitry Andric 981ad6265SDimitry Andric #ifndef _LIBCPP___ALGORITHM_RANGES_FIND_IF_H 1081ad6265SDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_FIND_IF_H 1181ad6265SDimitry Andric 1281ad6265SDimitry Andric #include <__config> 1381ad6265SDimitry Andric #include <__functional/identity.h> 1481ad6265SDimitry Andric #include <__functional/invoke.h> 1581ad6265SDimitry Andric #include <__functional/ranges_operations.h> 1681ad6265SDimitry Andric #include <__iterator/concepts.h> 1781ad6265SDimitry Andric #include <__iterator/projected.h> 1881ad6265SDimitry Andric #include <__ranges/access.h> 1981ad6265SDimitry Andric #include <__ranges/concepts.h> 2081ad6265SDimitry Andric #include <__ranges/dangling.h> 2181ad6265SDimitry Andric #include <__utility/move.h> 2281ad6265SDimitry Andric 2381ad6265SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 2481ad6265SDimitry Andric # pragma GCC system_header 2581ad6265SDimitry Andric #endif 2681ad6265SDimitry Andric 27b3edf446SDimitry Andric _LIBCPP_PUSH_MACROS 28b3edf446SDimitry Andric #include <__undef_macros> 29b3edf446SDimitry Andric 3006c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20 3181ad6265SDimitry Andric 3281ad6265SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 3381ad6265SDimitry Andric 3481ad6265SDimitry Andric namespace ranges { 3581ad6265SDimitry Andric 3681ad6265SDimitry Andric template <class _Ip, class _Sp, class _Pred, class _Proj> 3706c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr _Ip __find_if_impl(_Ip __first, _Sp __last, _Pred& __pred, _Proj& __proj) { 3881ad6265SDimitry Andric for (; __first != __last; ++__first) { 3981ad6265SDimitry Andric if (std::invoke(__pred, std::invoke(__proj, *__first))) 4081ad6265SDimitry Andric break; 4181ad6265SDimitry Andric } 4281ad6265SDimitry Andric return __first; 4381ad6265SDimitry Andric } 4481ad6265SDimitry Andric 4581ad6265SDimitry Andric namespace __find_if { 4681ad6265SDimitry Andric struct __fn { 4706c3fb27SDimitry Andric template <input_iterator _Ip, 4806c3fb27SDimitry Andric sentinel_for<_Ip> _Sp, 4906c3fb27SDimitry Andric class _Proj = identity, 5081ad6265SDimitry Andric indirect_unary_predicate<projected<_Ip, _Proj>> _Pred> 51*0fca6ea1SDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr _Ip 5206c3fb27SDimitry Andric operator()(_Ip __first, _Sp __last, _Pred __pred, _Proj __proj = {}) const { 5381ad6265SDimitry Andric return ranges::__find_if_impl(std::move(__first), std::move(__last), __pred, __proj); 5481ad6265SDimitry Andric } 5581ad6265SDimitry Andric 5606c3fb27SDimitry Andric template <input_range _Rp, class _Proj = identity, indirect_unary_predicate<projected<iterator_t<_Rp>, _Proj>> _Pred> 57*0fca6ea1SDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Rp> 5806c3fb27SDimitry Andric operator()(_Rp&& __r, _Pred __pred, _Proj __proj = {}) const { 5981ad6265SDimitry Andric return ranges::__find_if_impl(ranges::begin(__r), ranges::end(__r), __pred, __proj); 6081ad6265SDimitry Andric } 6181ad6265SDimitry Andric }; 6281ad6265SDimitry Andric } // namespace __find_if 6381ad6265SDimitry Andric 6481ad6265SDimitry Andric inline namespace __cpo { 6581ad6265SDimitry Andric inline constexpr auto find_if = __find_if::__fn{}; 6681ad6265SDimitry Andric } // namespace __cpo 6781ad6265SDimitry Andric } // namespace ranges 6881ad6265SDimitry Andric 6981ad6265SDimitry Andric _LIBCPP_END_NAMESPACE_STD 7081ad6265SDimitry Andric 7106c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20 7281ad6265SDimitry Andric 73b3edf446SDimitry Andric _LIBCPP_POP_MACROS 74b3edf446SDimitry Andric 7581ad6265SDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_FIND_IF_H 76