1fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 2fe6060f1SDimitry Andric // 3fe6060f1SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4fe6060f1SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5fe6060f1SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6fe6060f1SDimitry Andric // 7fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 8fe6060f1SDimitry Andric 9fe6060f1SDimitry Andric #ifndef _LIBCPP___ALGORITHM_UPPER_BOUND_H 10fe6060f1SDimitry Andric #define _LIBCPP___ALGORITHM_UPPER_BOUND_H 11fe6060f1SDimitry Andric 12fe6060f1SDimitry Andric #include <__algorithm/comp.h> 13fe6060f1SDimitry Andric #include <__algorithm/half_positive.h> 14fcaf7f86SDimitry Andric #include <__algorithm/iterator_operations.h> 1504eeddc0SDimitry Andric #include <__config> 16fcaf7f86SDimitry Andric #include <__functional/identity.h> 17fcaf7f86SDimitry Andric #include <__functional/invoke.h> 1881ad6265SDimitry Andric #include <__iterator/advance.h> 1981ad6265SDimitry Andric #include <__iterator/distance.h> 2081ad6265SDimitry Andric #include <__iterator/iterator_traits.h> 21*0fca6ea1SDimitry Andric #include <__type_traits/is_constructible.h> 22fcaf7f86SDimitry Andric #include <__utility/move.h> 23fe6060f1SDimitry Andric 24fe6060f1SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 25fe6060f1SDimitry Andric # pragma GCC system_header 26fe6060f1SDimitry Andric #endif 27fe6060f1SDimitry Andric 2806c3fb27SDimitry Andric _LIBCPP_PUSH_MACROS 2906c3fb27SDimitry Andric #include <__undef_macros> 3006c3fb27SDimitry Andric 31fe6060f1SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 32fe6060f1SDimitry Andric 33fcaf7f86SDimitry Andric template <class _AlgPolicy, class _Compare, class _Iter, class _Sent, class _Tp, class _Proj> 34bdd1243dSDimitry Andric _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Iter 35fcaf7f86SDimitry Andric __upper_bound(_Iter __first, _Sent __last, const _Tp& __value, _Compare&& __comp, _Proj&& __proj) { 36fcaf7f86SDimitry Andric auto __len = _IterOps<_AlgPolicy>::distance(__first, __last); 37fcaf7f86SDimitry Andric while (__len != 0) { 38fcaf7f86SDimitry Andric auto __half_len = std::__half_positive(__len); 39fcaf7f86SDimitry Andric auto __mid = _IterOps<_AlgPolicy>::next(__first, __half_len); 40fcaf7f86SDimitry Andric if (std::__invoke(__comp, __value, std::__invoke(__proj, *__mid))) 41fcaf7f86SDimitry Andric __len = __half_len; 42fcaf7f86SDimitry Andric else { 43fcaf7f86SDimitry Andric __first = ++__mid; 44fcaf7f86SDimitry Andric __len -= __half_len + 1; 45fe6060f1SDimitry Andric } 46fe6060f1SDimitry Andric } 47fe6060f1SDimitry Andric return __first; 48fe6060f1SDimitry Andric } 49fe6060f1SDimitry Andric 50fe6060f1SDimitry Andric template <class _ForwardIterator, class _Tp, class _Compare> 51*0fca6ea1SDimitry Andric _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator 52fcaf7f86SDimitry Andric upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value, _Compare __comp) { 5306c3fb27SDimitry Andric static_assert(is_copy_constructible<_ForwardIterator>::value, "Iterator has to be copy constructible"); 54fcaf7f86SDimitry Andric return std::__upper_bound<_ClassicAlgPolicy>( 55fcaf7f86SDimitry Andric std::move(__first), std::move(__last), __value, std::move(__comp), std::__identity()); 56fe6060f1SDimitry Andric } 57fe6060f1SDimitry Andric 58fe6060f1SDimitry Andric template <class _ForwardIterator, class _Tp> 59*0fca6ea1SDimitry Andric _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator 60fcaf7f86SDimitry Andric upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) { 6106c3fb27SDimitry Andric return std::upper_bound(std::move(__first), std::move(__last), __value, __less<>()); 62fe6060f1SDimitry Andric } 63fe6060f1SDimitry Andric 64fe6060f1SDimitry Andric _LIBCPP_END_NAMESPACE_STD 65fe6060f1SDimitry Andric 6606c3fb27SDimitry Andric _LIBCPP_POP_MACROS 6706c3fb27SDimitry Andric 68fe6060f1SDimitry Andric #endif // _LIBCPP___ALGORITHM_UPPER_BOUND_H 69