//===----------------------------------------------------------------------===// // // 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_LOWER_BOUND_H #define _LIBCPP___ALGORITHM_LOWER_BOUND_H #include <__algorithm/comp.h> #include <__algorithm/half_positive.h> #include <__algorithm/iterator_operations.h> #include <__config> #include <__functional/identity.h> #include <__functional/invoke.h> #include <__iterator/advance.h> #include <__iterator/distance.h> #include <__iterator/iterator_traits.h> #include <__type_traits/is_callable.h> #include <__type_traits/remove_reference.h> #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) # pragma GCC system_header #endif _LIBCPP_BEGIN_NAMESPACE_STD template <class _AlgPolicy, class _Iter, class _Sent, class _Type, class _Proj, class _Comp> _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Iter __lower_bound(_Iter __first, _Sent __last, const _Type& __value, _Comp& __comp, _Proj& __proj) { auto __len = _IterOps<_AlgPolicy>::distance(__first, __last); while (__len != 0) { auto __l2 = std::__half_positive(__len); _Iter __m = __first; _IterOps<_AlgPolicy>::advance(__m, __l2); if (std::__invoke(__comp, std::__invoke(__proj, *__m), __value)) { __first = ++__m; __len -= __l2 + 1; } else { __len = __l2; } } return __first; } template <class _ForwardIterator, class _Tp, class _Compare> _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator lower_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value, _Compare __comp) { static_assert(__is_callable<_Compare, decltype(*__first), const _Tp&>::value, "The comparator has to be callable"); auto __proj = std::__identity(); return std::__lower_bound<_ClassicAlgPolicy>(__first, __last, __value, __comp, __proj); } template <class _ForwardIterator, class _Tp> _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator lower_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) { return std::lower_bound(__first, __last, __value, __less<>()); } _LIBCPP_END_NAMESPACE_STD #endif // _LIBCPP___ALGORITHM_LOWER_BOUND_H