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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP___ALGORIHTM_ITERATOR_OPERATIONS_H 10 #define _LIBCPP___ALGORIHTM_ITERATOR_OPERATIONS_H 11 12 #include <__config> 13 #include <__iterator/advance.h> 14 #include <__iterator/distance.h> 15 #include <__iterator/iterator_traits.h> 16 #include <__iterator/next.h> 17 18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 19 # pragma GCC system_header 20 #endif 21 22 _LIBCPP_BEGIN_NAMESPACE_STD 23 24 #if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES) 25 struct _RangesIterOps { 26 static constexpr auto advance = ranges::advance; 27 static constexpr auto distance = ranges::distance; 28 static constexpr auto next = ranges::next; 29 }; 30 #endif 31 32 struct _StdIterOps { 33 34 template <class _Iterator, class _Distance> 35 _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR_AFTER_CXX11 void advance(_Iterator& __iter, _Distance __count) { 36 return std::advance(__iter, __count); 37 } 38 39 template <class _Iterator> 40 _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR_AFTER_CXX11 41 typename iterator_traits<_Iterator>::difference_type distance(_Iterator __first, _Iterator __last) { 42 return std::distance(__first, __last); 43 } 44 45 template <class _Iterator> 46 _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR_AFTER_CXX11 47 _Iterator next(_Iterator, _Iterator __last) { 48 return __last; 49 } 50 51 }; 52 53 _LIBCPP_END_NAMESPACE_STD 54 55 #endif // _LIBCPP___ALGORIHTM_ITERATOR_OPERATIONS_H 56