1 //===----------------------------------------------------------------------===//
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
7 //===----------------------------------------------------------------------===//
9 #ifndef _LIBCPP___ALGORITHM_BINARY_SEARCH_H
10 #define _LIBCPP___ALGORITHM_BINARY_SEARCH_H
13 #include <__algorithm/comp.h>
14 #include <__algorithm/lower_bound.h>
15 #include <__algorithm/comp_ref_type.h>
16 #include <__iterator/iterator_traits.h>
18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
19 #pragma GCC system_header
23 #include <__undef_macros>
25 _LIBCPP_BEGIN_NAMESPACE_STD
27 template <class _Compare, class _ForwardIterator, class _Tp>
28 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
30 __binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp)
32 __first = _VSTD::__lower_bound<_Compare>(__first, __last, __value_, __comp);
33 return __first != __last && !__comp(__value_, *__first);
36 template <class _ForwardIterator, class _Tp, class _Compare>
37 _LIBCPP_NODISCARD_EXT inline
38 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
40 binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp)
42 typedef typename __comp_ref_type<_Compare>::type _Comp_ref;
43 return _VSTD::__binary_search<_Comp_ref>(__first, __last, __value_, __comp);
46 template <class _ForwardIterator, class _Tp>
47 _LIBCPP_NODISCARD_EXT inline
48 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
50 binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_)
52 return _VSTD::binary_search(__first, __last, __value_,
53 __less<typename iterator_traits<_ForwardIterator>::value_type, _Tp>());
57 _LIBCPP_END_NAMESPACE_STD
61 #endif // _LIBCPP___ALGORITHM_BINARY_SEARCH_H