1134723edSLouis Dionne //===----------------------------------------------------------------------===// 2134723edSLouis Dionne // 3134723edSLouis Dionne // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4134723edSLouis Dionne // See https://llvm.org/LICENSE.txt for license information. 5134723edSLouis Dionne // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6134723edSLouis Dionne // 7134723edSLouis Dionne //===----------------------------------------------------------------------===// 8134723edSLouis Dionne 9134723edSLouis Dionne #ifndef _LIBCPP___ALGORITHM_UPPER_BOUND_H 10134723edSLouis Dionne #define _LIBCPP___ALGORITHM_UPPER_BOUND_H 11134723edSLouis Dionne 12134723edSLouis Dionne #include <__algorithm/comp.h> 13134723edSLouis Dionne #include <__algorithm/half_positive.h> 140f6364b8SHui Xie #include <__algorithm/iterator_operations.h> 154d81a46fSArthur O'Dwyer #include <__config> 160f6364b8SHui Xie #include <__functional/identity.h> 170f6364b8SHui Xie #include <__functional/invoke.h> 183cd4531bSNikolas Klauser #include <__iterator/advance.h> 193cd4531bSNikolas Klauser #include <__iterator/distance.h> 203cd4531bSNikolas Klauser #include <__iterator/iterator_traits.h> 210f6364b8SHui Xie #include <__type_traits/is_copy_constructible.h> 220f6364b8SHui Xie #include <__utility/move.h> 23134723edSLouis Dionne 24134723edSLouis Dionne #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 25134723edSLouis Dionne # pragma GCC system_header 26134723edSLouis Dionne #endif 27134723edSLouis Dionne 28*92e4d679SNicole Rabjohn _LIBCPP_PUSH_MACROS 29*92e4d679SNicole Rabjohn #include <__undef_macros> 30*92e4d679SNicole Rabjohn 31134723edSLouis Dionne _LIBCPP_BEGIN_NAMESPACE_STD 32134723edSLouis Dionne 330f6364b8SHui Xie template <class _AlgPolicy, class _Compare, class _Iter, class _Sent, class _Tp, class _Proj> 345146b57bSNikolas Klauser _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Iter 350f6364b8SHui Xie __upper_bound(_Iter __first, _Sent __last, const _Tp& __value, _Compare&& __comp, _Proj&& __proj) { 360f6364b8SHui Xie auto __len = _IterOps<_AlgPolicy>::distance(__first, __last); 370f6364b8SHui Xie while (__len != 0) { 380f6364b8SHui Xie auto __half_len = std::__half_positive(__len); 390f6364b8SHui Xie auto __mid = _IterOps<_AlgPolicy>::next(__first, __half_len); 400f6364b8SHui Xie if (std::__invoke(__comp, __value, std::__invoke(__proj, *__mid))) 410f6364b8SHui Xie __len = __half_len; 420f6364b8SHui Xie else { 430f6364b8SHui Xie __first = ++__mid; 440f6364b8SHui Xie __len -= __half_len + 1; 45134723edSLouis Dionne } 46134723edSLouis Dionne } 47134723edSLouis Dionne return __first; 48134723edSLouis Dionne } 49134723edSLouis Dionne 50134723edSLouis Dionne template <class _ForwardIterator, class _Tp, class _Compare> 515146b57bSNikolas Klauser _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator 520f6364b8SHui Xie upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value, _Compare __comp) { 5388632e48SNikolas Klauser static_assert(is_copy_constructible<_ForwardIterator>::value, "Iterator has to be copy constructible"); 540f6364b8SHui Xie return std::__upper_bound<_ClassicAlgPolicy>( 550f6364b8SHui Xie std::move(__first), std::move(__last), __value, std::move(__comp), std::__identity()); 56134723edSLouis Dionne } 57134723edSLouis Dionne 58134723edSLouis Dionne template <class _ForwardIterator, class _Tp> 595146b57bSNikolas Klauser _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator 600f6364b8SHui Xie upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) { 6188632e48SNikolas Klauser return std::upper_bound(std::move(__first), std::move(__last), __value, __less<>()); 62134723edSLouis Dionne } 63134723edSLouis Dionne 64134723edSLouis Dionne _LIBCPP_END_NAMESPACE_STD 65134723edSLouis Dionne 66*92e4d679SNicole Rabjohn _LIBCPP_POP_MACROS 67*92e4d679SNicole Rabjohn 68134723edSLouis Dionne #endif // _LIBCPP___ALGORITHM_UPPER_BOUND_H 69