61 lines · c
1// -*- C++ -*-2//===----------------------------------------------------------------------===//3//4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.5// See https://llvm.org/LICENSE.txt for license information.6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___CXX03___NUMERIC_ADJACENT_DIFFERENCE_H11#define _LIBCPP___CXX03___NUMERIC_ADJACENT_DIFFERENCE_H12 13#include <__cxx03/__config>14#include <__cxx03/__iterator/iterator_traits.h>15#include <__cxx03/__utility/move.h>16 17#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)18# pragma GCC system_header19#endif20 21_LIBCPP_PUSH_MACROS22#include <__cxx03/__undef_macros>23 24_LIBCPP_BEGIN_NAMESPACE_STD25 26template <class _InputIterator, class _OutputIterator>27_LIBCPP_HIDE_FROM_ABI _OutputIterator28adjacent_difference(_InputIterator __first, _InputIterator __last, _OutputIterator __result) {29 if (__first != __last) {30 typename iterator_traits<_InputIterator>::value_type __acc(*__first);31 *__result = __acc;32 for (++__first, (void)++__result; __first != __last; ++__first, (void)++__result) {33 typename iterator_traits<_InputIterator>::value_type __val(*__first);34 *__result = __val - __acc;35 __acc = std::move(__val);36 }37 }38 return __result;39}40 41template <class _InputIterator, class _OutputIterator, class _BinaryOperation>42_LIBCPP_HIDE_FROM_ABI _OutputIterator adjacent_difference(43 _InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryOperation __binary_op) {44 if (__first != __last) {45 typename iterator_traits<_InputIterator>::value_type __acc(*__first);46 *__result = __acc;47 for (++__first, (void)++__result; __first != __last; ++__first, (void)++__result) {48 typename iterator_traits<_InputIterator>::value_type __val(*__first);49 *__result = __binary_op(__val, __acc);50 __acc = std::move(__val);51 }52 }53 return __result;54}55 56_LIBCPP_END_NAMESPACE_STD57 58_LIBCPP_POP_MACROS59 60#endif // _LIBCPP___CXX03___NUMERIC_ADJACENT_DIFFERENCE_H61