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51 lines
1.6 KiB
C++
51 lines
1.6 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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// SPDX-FileCopyrightText: Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES.
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCUDACXX___RANGES_DANGLING_H
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#define _LIBCUDACXX___RANGES_DANGLING_H
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#include <cuda/std/detail/__config>
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#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
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# pragma GCC system_header
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#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
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# pragma clang system_header
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#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
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# pragma system_header
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#endif // no system header
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#include <cuda/std/__ranges/access.h>
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#include <cuda/std/__ranges/concepts.h>
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#include <cuda/std/__type_traits/enable_if.h>
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_LIBCUDACXX_BEGIN_NAMESPACE_RANGES
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struct dangling
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{
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_CCCL_HIDE_FROM_ABI dangling() = default;
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template <class... _Args>
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_LIBCUDACXX_HIDE_FROM_ABI constexpr dangling(_Args&&...) noexcept
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{}
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};
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#if !defined(_CCCL_NO_CONCEPTS)
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template <range _Rp>
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using borrowed_iterator_t = _If<borrowed_range<_Rp>, iterator_t<_Rp>, dangling>;
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#else // ^^^ !_CCCL_NO_CONCEPTS ^^^ / vvv _CCCL_NO_CONCEPTS vvv
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template <class _Rp>
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using borrowed_iterator_t = enable_if_t<range<_Rp>, _If<borrowed_range<_Rp>, iterator_t<_Rp>, dangling>>;
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#endif // _CCCL_NO_CONCEPTS
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// borrowed_subrange_t defined in <__ranges/subrange.h>
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_LIBCUDACXX_END_NAMESPACE_RANGES
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#endif // _LIBCUDACXX___RANGES_DANGLING_H
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