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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES.
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCUDACXX___ITERATOR_NEXT_H
#define _LIBCUDACXX___ITERATOR_NEXT_H
#ifndef __cuda_std__
#include <__config>
#endif // __cuda_std__
#include "../__assert"
#include "../__iterator/advance.h"
#include "../__iterator/concepts.h"
#include "../__iterator/incrementable_traits.h"
#include "../__iterator/iterator_traits.h"
#include "../__type_traits/enable_if.h"
#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
# pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
# pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
# pragma system_header
#endif // no system header
_LIBCUDACXX_BEGIN_NAMESPACE_STD
template <class _InputIter>
inline _LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_AFTER_CXX14
__enable_if_t<__is_cpp17_input_iterator<_InputIter>::value, _InputIter>
next(_InputIter __x, typename iterator_traits<_InputIter>::difference_type __n = 1) {
_LIBCUDACXX_ASSERT(__n >= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value,
"Attempt to next(it, n) with negative n on a non-bidirectional iterator");
_CUDA_VSTD::advance(__x, __n);
return __x;
}
_LIBCUDACXX_END_NAMESPACE_STD
#if _LIBCUDACXX_STD_VER > 14 && !defined(_LIBCUDACXX_COMPILER_MSVC_2017)
// [range.iter.op.next]
_LIBCUDACXX_BEGIN_NAMESPACE_RANGES
_LIBCUDACXX_BEGIN_NAMESPACE_CPO(__next)
struct __fn {
_LIBCUDACXX_TEMPLATE(class _Ip)
_LIBCUDACXX_REQUIRES(input_or_output_iterator<_Ip>)
_LIBCUDACXX_HIDE_FROM_ABI _LIBCUDACXX_INLINE_VISIBILITY
constexpr _Ip operator()(_Ip __x) const {
++__x;
return __x;
}
_LIBCUDACXX_TEMPLATE(class _Ip)
_LIBCUDACXX_REQUIRES(input_or_output_iterator<_Ip>)
_LIBCUDACXX_HIDE_FROM_ABI _LIBCUDACXX_INLINE_VISIBILITY
constexpr _Ip operator()(_Ip __x, iter_difference_t<_Ip> __n) const {
_CUDA_VRANGES::advance(__x, __n);
return __x;
}
_LIBCUDACXX_TEMPLATE(class _Ip, class _Sp)
_LIBCUDACXX_REQUIRES(input_or_output_iterator<_Ip> && sentinel_for<_Sp, _Ip>)
_LIBCUDACXX_HIDE_FROM_ABI _LIBCUDACXX_INLINE_VISIBILITY constexpr _Ip operator()(_Ip __x, _Sp __bound_sentinel) const {
_CUDA_VRANGES::advance(__x, __bound_sentinel);
return __x;
}
_LIBCUDACXX_TEMPLATE(class _Ip, class _Sp)
_LIBCUDACXX_REQUIRES(input_or_output_iterator<_Ip> && sentinel_for<_Sp, _Ip>)
_LIBCUDACXX_HIDE_FROM_ABI _LIBCUDACXX_INLINE_VISIBILITY constexpr _Ip operator()(_Ip __x, iter_difference_t<_Ip> __n, _Sp __bound_sentinel) const {
_CUDA_VRANGES::advance(__x, __n, __bound_sentinel);
return __x;
}
};
_LIBCUDACXX_END_NAMESPACE_CPO
inline namespace __cpo {
_LIBCUDACXX_CPO_ACCESSIBILITY auto next = __next::__fn{};
} // namespace __cpo
_LIBCUDACXX_END_NAMESPACE_RANGES
#endif // _LIBCUDACXX_STD_VER > 14 && !defined(_LIBCUDACXX_COMPILER_MSVC_2017)
#endif // _LIBCUDACXX___ITERATOR_NEXT_H
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