derek.holloway
7502bf64a4
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68 lines
2.5 KiB
C++
68 lines
2.5 KiB
C++
//===----------------------------------------------------------------------===//
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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) 2023-24 NVIDIA CORPORATION & AFFILIATES.
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCUDACXX___CONCEPTS_CONVERTIBLE_TO_H
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#define _LIBCUDACXX___CONCEPTS_CONVERTIBLE_TO_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/__concepts/concept_macros.h>
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#include <cuda/std/__type_traits/is_convertible.h>
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#include <cuda/std/__utility/declval.h>
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_LIBCUDACXX_BEGIN_NAMESPACE_STD
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// [concept.convertible]
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#if !defined(_CCCL_NO_CONCEPTS)
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template <class _From, class _To>
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concept convertible_to = is_convertible_v<_From, _To> && requires { static_cast<_To>(_CUDA_VSTD::declval<_From>()); };
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#elif !defined(_CCCL_NO_VARIABLE_TEMPLATES) // ^^^ !_CCCL_NO_CONCEPTS ^^^
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# if _CCCL_COMPILER(MSVC)
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_CCCL_BEGIN_NV_DIAG_SUPPRESS(1211) // nonstandard cast to array type ignored
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# endif // _CCCL_COMPILER(MSVC)
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_CCCL_BEGIN_NV_DIAG_SUPPRESS(171) // invalid type conversion, e.g. [with _From=int **, _To=const int *const *]
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// We cannot put this conversion check with the other constraint, as types with deleted operator will break here
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template <class _From, class _To>
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_CCCL_CONCEPT_FRAGMENT(__test_conversion_, requires()(static_cast<_To>(_CUDA_VSTD::declval<_From>())));
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template <class _From, class _To>
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_CCCL_CONCEPT __test_conversion = _CCCL_FRAGMENT(__test_conversion_, _From, _To);
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template <class _From, class _To>
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_CCCL_CONCEPT_FRAGMENT(
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__convertible_to_,
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requires()(requires(_CCCL_TRAIT(is_convertible, _From, _To)), requires(__test_conversion<_From, _To>)));
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template <class _From, class _To>
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_CCCL_CONCEPT convertible_to = _CCCL_FRAGMENT(__convertible_to_, _From, _To);
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# if _CCCL_COMPILER(MSVC)
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_CCCL_END_NV_DIAG_SUPPRESS() // nonstandard cast to array type ignored
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# endif // _CCCL_COMPILER(MSVC)
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_CCCL_END_NV_DIAG_SUPPRESS() // invalid type conversion, e.g. [with _From=int **, _To=const int *const *]
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#endif // ^^^ !_CCCL_NO_VARIABLE_TEMPLATES ^^^
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_LIBCUDACXX_END_NAMESPACE_STD
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#endif // _LIBCUDACXX___CONCEPTS_CONVERTIBLE_TO_H
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