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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP___ALGORITHM_BINARY_SEARCH_H 10 #define _LIBCPP___ALGORITHM_BINARY_SEARCH_H 11 12 #include <__algorithm/comp.h> 13 #include <__algorithm/comp_ref_type.h> 14 #include <__algorithm/lower_bound.h> 15 #include <__config> 16 17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18 # pragma GCC system_header 19 #endif 20 21 _LIBCPP_BEGIN_NAMESPACE_STD 22 23 template <class _ForwardIterator, class _Tp, class _Compare> 24 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool 25 binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value, _Compare __comp) { 26 __first = std::lower_bound<_ForwardIterator, _Tp, __comp_ref_type<_Compare> >(__first, __last, __value, __comp); 27 return __first != __last && !__comp(__value, *__first); 28 } 29 30 template <class _ForwardIterator, class _Tp> 31 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool 32 binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) { 33 return std::binary_search(__first, __last, __value, __less<>()); 34 } 35 36 _LIBCPP_END_NAMESPACE_STD 37 38 #endif // _LIBCPP___ALGORITHM_BINARY_SEARCH_H 39