1*4bdff4beSrobert //===----------------------------------------------------------------------===// 2*4bdff4beSrobert // 3*4bdff4beSrobert // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*4bdff4beSrobert // See https://llvm.org/LICENSE.txt for license information. 5*4bdff4beSrobert // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*4bdff4beSrobert // 7*4bdff4beSrobert //===----------------------------------------------------------------------===// 8*4bdff4beSrobert 9*4bdff4beSrobert #ifndef _LIBCPP___ALGORITHM_RANGES_BINARY_SEARCH_H 10*4bdff4beSrobert #define _LIBCPP___ALGORITHM_RANGES_BINARY_SEARCH_H 11*4bdff4beSrobert 12*4bdff4beSrobert #include <__algorithm/iterator_operations.h> 13*4bdff4beSrobert #include <__algorithm/lower_bound.h> 14*4bdff4beSrobert #include <__config> 15*4bdff4beSrobert #include <__functional/identity.h> 16*4bdff4beSrobert #include <__functional/invoke.h> 17*4bdff4beSrobert #include <__functional/ranges_operations.h> 18*4bdff4beSrobert #include <__iterator/concepts.h> 19*4bdff4beSrobert #include <__iterator/projected.h> 20*4bdff4beSrobert #include <__ranges/access.h> 21*4bdff4beSrobert #include <__ranges/concepts.h> 22*4bdff4beSrobert 23*4bdff4beSrobert #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 24*4bdff4beSrobert # pragma GCC system_header 25*4bdff4beSrobert #endif 26*4bdff4beSrobert 27*4bdff4beSrobert #if _LIBCPP_STD_VER > 17 28*4bdff4beSrobert 29*4bdff4beSrobert _LIBCPP_BEGIN_NAMESPACE_STD 30*4bdff4beSrobert 31*4bdff4beSrobert namespace ranges { 32*4bdff4beSrobert namespace __binary_search { 33*4bdff4beSrobert struct __fn { 34*4bdff4beSrobert template <forward_iterator _Iter, sentinel_for<_Iter> _Sent, class _Type, class _Proj = identity, 35*4bdff4beSrobert indirect_strict_weak_order<const _Type*, projected<_Iter, _Proj>> _Comp = ranges::less> 36*4bdff4beSrobert _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr operator__fn37*4bdff4beSrobert bool operator()(_Iter __first, _Sent __last, const _Type& __value, _Comp __comp = {}, _Proj __proj = {}) const { 38*4bdff4beSrobert auto __ret = std::__lower_bound_impl<_RangeAlgPolicy>(__first, __last, __value, __comp, __proj); 39*4bdff4beSrobert return __ret != __last && !std::invoke(__comp, __value, std::invoke(__proj, *__ret)); 40*4bdff4beSrobert } 41*4bdff4beSrobert 42*4bdff4beSrobert template <forward_range _Range, class _Type, class _Proj = identity, 43*4bdff4beSrobert indirect_strict_weak_order<const _Type*, projected<iterator_t<_Range>, _Proj>> _Comp = ranges::less> 44*4bdff4beSrobert _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr operator__fn45*4bdff4beSrobert bool operator()(_Range&& __r, const _Type& __value, _Comp __comp = {}, _Proj __proj = {}) const { 46*4bdff4beSrobert auto __first = ranges::begin(__r); 47*4bdff4beSrobert auto __last = ranges::end(__r); 48*4bdff4beSrobert auto __ret = std::__lower_bound_impl<_RangeAlgPolicy>(__first, __last, __value, __comp, __proj); 49*4bdff4beSrobert return __ret != __last && !std::invoke(__comp, __value, std::invoke(__proj, *__ret)); 50*4bdff4beSrobert } 51*4bdff4beSrobert }; 52*4bdff4beSrobert } // namespace __binary_search 53*4bdff4beSrobert 54*4bdff4beSrobert inline namespace __cpo { 55*4bdff4beSrobert inline constexpr auto binary_search = __binary_search::__fn{}; 56*4bdff4beSrobert } // namespace __cpo 57*4bdff4beSrobert } // namespace ranges 58*4bdff4beSrobert 59*4bdff4beSrobert _LIBCPP_END_NAMESPACE_STD 60*4bdff4beSrobert 61*4bdff4beSrobert #endif // _LIBCPP_STD_VER > 17 62*4bdff4beSrobert 63*4bdff4beSrobert #endif // _LIBCPP___ALGORITHM_RANGES_BINARY_SEARCH_H 64