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1//===----------------------------------------------------------------------===//2//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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___CXX03___ALGORITHM_UNIQUE_H10#define _LIBCPP___CXX03___ALGORITHM_UNIQUE_H11 12#include <__cxx03/__algorithm/adjacent_find.h>13#include <__cxx03/__algorithm/comp.h>14#include <__cxx03/__algorithm/iterator_operations.h>15#include <__cxx03/__config>16#include <__cxx03/__iterator/iterator_traits.h>17#include <__cxx03/__utility/move.h>18#include <__cxx03/__utility/pair.h>19 20#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)21# pragma GCC system_header22#endif23 24_LIBCPP_PUSH_MACROS25#include <__cxx03/__undef_macros>26 27_LIBCPP_BEGIN_NAMESPACE_STD28 29// unique30 31template <class _AlgPolicy, class _Iter, class _Sent, class _BinaryPredicate>32_LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI std::pair<_Iter, _Iter>33__unique(_Iter __first, _Sent __last, _BinaryPredicate&& __pred) {34 __first = std::__adjacent_find(__first, __last, __pred);35 if (__first != __last) {36 // ... a a ? ...37 // f i38 _Iter __i = __first;39 for (++__i; ++__i != __last;)40 if (!__pred(*__first, *__i))41 *++__first = _IterOps<_AlgPolicy>::__iter_move(__i);42 ++__first;43 return std::pair<_Iter, _Iter>(std::move(__first), std::move(__i));44 }45 return std::pair<_Iter, _Iter>(__first, __first);46}47 48template <class _ForwardIterator, class _BinaryPredicate>49_LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI _ForwardIterator50unique(_ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred) {51 return std::__unique<_ClassicAlgPolicy>(std::move(__first), std::move(__last), __pred).first;52}53 54template <class _ForwardIterator>55_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _ForwardIterator56unique(_ForwardIterator __first, _ForwardIterator __last) {57 return std::unique(__first, __last, __equal_to());58}59 60_LIBCPP_END_NAMESPACE_STD61 62_LIBCPP_POP_MACROS63 64#endif // _LIBCPP___CXX03___ALGORITHM_UNIQUE_H65