1e78f53d1SNikolas Klauser //===----------------------------------------------------------------------===// 2e78f53d1SNikolas Klauser // 3e78f53d1SNikolas Klauser // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4e78f53d1SNikolas Klauser // See https://llvm.org/LICENSE.txt for license information. 5e78f53d1SNikolas Klauser // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6e78f53d1SNikolas Klauser // 7e78f53d1SNikolas Klauser //===----------------------------------------------------------------------===// 8e78f53d1SNikolas Klauser 9*ce777190SNikolas Klauser #ifndef _LIBCPP___CXX03___ALGORITHM_UPPER_BOUND_H 10*ce777190SNikolas Klauser #define _LIBCPP___CXX03___ALGORITHM_UPPER_BOUND_H 11e78f53d1SNikolas Klauser 1273fbae83SNikolas Klauser #include <__cxx03/__algorithm/comp.h> 1373fbae83SNikolas Klauser #include <__cxx03/__algorithm/half_positive.h> 1473fbae83SNikolas Klauser #include <__cxx03/__algorithm/iterator_operations.h> 1573fbae83SNikolas Klauser #include <__cxx03/__config> 1673fbae83SNikolas Klauser #include <__cxx03/__functional/identity.h> 1773fbae83SNikolas Klauser #include <__cxx03/__functional/invoke.h> 1873fbae83SNikolas Klauser #include <__cxx03/__iterator/advance.h> 1973fbae83SNikolas Klauser #include <__cxx03/__iterator/distance.h> 2073fbae83SNikolas Klauser #include <__cxx03/__iterator/iterator_traits.h> 2173fbae83SNikolas Klauser #include <__cxx03/__type_traits/is_constructible.h> 2273fbae83SNikolas Klauser #include <__cxx03/__utility/move.h> 23e78f53d1SNikolas Klauser 24e78f53d1SNikolas Klauser #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 25e78f53d1SNikolas Klauser # pragma GCC system_header 26e78f53d1SNikolas Klauser #endif 27e78f53d1SNikolas Klauser 28e78f53d1SNikolas Klauser _LIBCPP_PUSH_MACROS 2973fbae83SNikolas Klauser #include <__cxx03/__undef_macros> 30e78f53d1SNikolas Klauser 31e78f53d1SNikolas Klauser _LIBCPP_BEGIN_NAMESPACE_STD 32e78f53d1SNikolas Klauser 33e78f53d1SNikolas Klauser template <class _AlgPolicy, class _Compare, class _Iter, class _Sent, class _Tp, class _Proj> 34e78f53d1SNikolas Klauser _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Iter 35e78f53d1SNikolas Klauser __upper_bound(_Iter __first, _Sent __last, const _Tp& __value, _Compare&& __comp, _Proj&& __proj) { 36e78f53d1SNikolas Klauser auto __len = _IterOps<_AlgPolicy>::distance(__first, __last); 37e78f53d1SNikolas Klauser while (__len != 0) { 38e78f53d1SNikolas Klauser auto __half_len = std::__half_positive(__len); 39e78f53d1SNikolas Klauser auto __mid = _IterOps<_AlgPolicy>::next(__first, __half_len); 40e78f53d1SNikolas Klauser if (std::__invoke(__comp, __value, std::__invoke(__proj, *__mid))) 41e78f53d1SNikolas Klauser __len = __half_len; 42e78f53d1SNikolas Klauser else { 43e78f53d1SNikolas Klauser __first = ++__mid; 44e78f53d1SNikolas Klauser __len -= __half_len + 1; 45e78f53d1SNikolas Klauser } 46e78f53d1SNikolas Klauser } 47e78f53d1SNikolas Klauser return __first; 48e78f53d1SNikolas Klauser } 49e78f53d1SNikolas Klauser 50e78f53d1SNikolas Klauser template <class _ForwardIterator, class _Tp, class _Compare> 51e78f53d1SNikolas Klauser _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator 52e78f53d1SNikolas Klauser upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value, _Compare __comp) { 53e78f53d1SNikolas Klauser static_assert(is_copy_constructible<_ForwardIterator>::value, "Iterator has to be copy constructible"); 54e78f53d1SNikolas Klauser return std::__upper_bound<_ClassicAlgPolicy>( 55e78f53d1SNikolas Klauser std::move(__first), std::move(__last), __value, std::move(__comp), std::__identity()); 56e78f53d1SNikolas Klauser } 57e78f53d1SNikolas Klauser 58e78f53d1SNikolas Klauser template <class _ForwardIterator, class _Tp> 59e78f53d1SNikolas Klauser _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator 60e78f53d1SNikolas Klauser upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) { 61e78f53d1SNikolas Klauser return std::upper_bound(std::move(__first), std::move(__last), __value, __less<>()); 62e78f53d1SNikolas Klauser } 63e78f53d1SNikolas Klauser 64e78f53d1SNikolas Klauser _LIBCPP_END_NAMESPACE_STD 65e78f53d1SNikolas Klauser 66e78f53d1SNikolas Klauser _LIBCPP_POP_MACROS 67e78f53d1SNikolas Klauser 68*ce777190SNikolas Klauser #endif // _LIBCPP___CXX03___ALGORITHM_UPPER_BOUND_H 69