| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___ALGORITHM_BINARY_SEARCH_H |
| #define _LIBCPP___ALGORITHM_BINARY_SEARCH_H |
| |
| #include <__config> |
| #include <__algorithm/comp.h> |
| #include <__algorithm/comp_ref_type.h> |
| #include <__algorithm/lower_bound.h> |
| #include <__iterator/iterator_traits.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| #pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _Compare, class _ForwardIterator, class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 |
| bool |
| __binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) |
| { |
| __first = _VSTD::__lower_bound<_Compare>(__first, __last, __value_, __comp); |
| return __first != __last && !__comp(__value_, *__first); |
| } |
| |
| template <class _ForwardIterator, class _Tp, class _Compare> |
| _LIBCPP_NODISCARD_EXT inline |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 |
| bool |
| binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) |
| { |
| typedef typename __comp_ref_type<_Compare>::type _Comp_ref; |
| return _VSTD::__binary_search<_Comp_ref>(__first, __last, __value_, __comp); |
| } |
| |
| template <class _ForwardIterator, class _Tp> |
| _LIBCPP_NODISCARD_EXT inline |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 |
| bool |
| binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) |
| { |
| return _VSTD::binary_search(__first, __last, __value_, |
| __less<typename iterator_traits<_ForwardIterator>::value_type, _Tp>()); |
| } |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___ALGORITHM_BINARY_SEARCH_H |