14824e7fdSDimitry Andric // -*- C++ -*- 24824e7fdSDimitry Andric //===----------------------------------------------------------------------===// 34824e7fdSDimitry Andric // 44824e7fdSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 54824e7fdSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 64824e7fdSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 74824e7fdSDimitry Andric // 84824e7fdSDimitry Andric //===----------------------------------------------------------------------===// 94824e7fdSDimitry Andric 104824e7fdSDimitry Andric #ifndef _LIBCPP___NUMERIC_ADJACENT_DIFFERENCE_H 114824e7fdSDimitry Andric #define _LIBCPP___NUMERIC_ADJACENT_DIFFERENCE_H 124824e7fdSDimitry Andric 134824e7fdSDimitry Andric #include <__config> 144824e7fdSDimitry Andric #include <__iterator/iterator_traits.h> 154824e7fdSDimitry Andric #include <__utility/move.h> 164824e7fdSDimitry Andric 174824e7fdSDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 184824e7fdSDimitry Andric # pragma GCC system_header 194824e7fdSDimitry Andric #endif 204824e7fdSDimitry Andric 21*06c3fb27SDimitry Andric _LIBCPP_PUSH_MACROS 22*06c3fb27SDimitry Andric #include <__undef_macros> 23*06c3fb27SDimitry Andric 244824e7fdSDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 254824e7fdSDimitry Andric 264824e7fdSDimitry Andric template <class _InputIterator, class _OutputIterator> 27bdd1243dSDimitry Andric _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 284824e7fdSDimitry Andric _OutputIterator 294824e7fdSDimitry Andric adjacent_difference(_InputIterator __first, _InputIterator __last, _OutputIterator __result) 304824e7fdSDimitry Andric { 314824e7fdSDimitry Andric if (__first != __last) 324824e7fdSDimitry Andric { 334824e7fdSDimitry Andric typename iterator_traits<_InputIterator>::value_type __acc(*__first); 344824e7fdSDimitry Andric *__result = __acc; 354824e7fdSDimitry Andric for (++__first, (void) ++__result; __first != __last; ++__first, (void) ++__result) 364824e7fdSDimitry Andric { 374824e7fdSDimitry Andric typename iterator_traits<_InputIterator>::value_type __val(*__first); 38*06c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20 394824e7fdSDimitry Andric *__result = __val - _VSTD::move(__acc); 404824e7fdSDimitry Andric #else 414824e7fdSDimitry Andric *__result = __val - __acc; 424824e7fdSDimitry Andric #endif 434824e7fdSDimitry Andric __acc = _VSTD::move(__val); 444824e7fdSDimitry Andric } 454824e7fdSDimitry Andric } 464824e7fdSDimitry Andric return __result; 474824e7fdSDimitry Andric } 484824e7fdSDimitry Andric 494824e7fdSDimitry Andric template <class _InputIterator, class _OutputIterator, class _BinaryOperation> 50bdd1243dSDimitry Andric _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 514824e7fdSDimitry Andric _OutputIterator 524824e7fdSDimitry Andric adjacent_difference(_InputIterator __first, _InputIterator __last, _OutputIterator __result, 534824e7fdSDimitry Andric _BinaryOperation __binary_op) 544824e7fdSDimitry Andric { 554824e7fdSDimitry Andric if (__first != __last) 564824e7fdSDimitry Andric { 574824e7fdSDimitry Andric typename iterator_traits<_InputIterator>::value_type __acc(*__first); 584824e7fdSDimitry Andric *__result = __acc; 594824e7fdSDimitry Andric for (++__first, (void) ++__result; __first != __last; ++__first, (void) ++__result) 604824e7fdSDimitry Andric { 614824e7fdSDimitry Andric typename iterator_traits<_InputIterator>::value_type __val(*__first); 62*06c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20 634824e7fdSDimitry Andric *__result = __binary_op(__val, _VSTD::move(__acc)); 644824e7fdSDimitry Andric #else 654824e7fdSDimitry Andric *__result = __binary_op(__val, __acc); 664824e7fdSDimitry Andric #endif 674824e7fdSDimitry Andric __acc = _VSTD::move(__val); 684824e7fdSDimitry Andric } 694824e7fdSDimitry Andric } 704824e7fdSDimitry Andric return __result; 714824e7fdSDimitry Andric } 724824e7fdSDimitry Andric 734824e7fdSDimitry Andric _LIBCPP_END_NAMESPACE_STD 744824e7fdSDimitry Andric 75*06c3fb27SDimitry Andric _LIBCPP_POP_MACROS 76*06c3fb27SDimitry Andric 774824e7fdSDimitry Andric #endif // _LIBCPP___NUMERIC_ADJACENT_DIFFERENCE_H 78