51 lines
1.8 KiB
C
51 lines
1.8 KiB
C
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//===----------------------------------------------------------------------===//
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//
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// Part of libcu++, the C++ Standard Library for your entire system,
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// 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) 2025 NVIDIA CORPORATION & AFFILIATES.
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//
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//===----------------------------------------------------------------------===//
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#ifndef _CUDA___UTILITY_IMMOVABLE_H
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#define _CUDA___UTILITY_IMMOVABLE_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/__cccl/prologue.h>
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_CCCL_BEGIN_NAMESPACE_CUDA
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// BUG (gcc#98995): copy elision fails when initializing a [[no_unique_address]] field
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// from a function returning an object of class type by value.
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// See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98995
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#if _CCCL_COMPILER(GCC)
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// By declaring the move constructor but not defining it, any TU that ODR-uses the move
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// constructor will cause a linker error.
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# define _CCCL_IMMOVABLE(_XP) _CCCL_API _XP(_XP&&) noexcept
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#else // ^^^ _CCCL_COMPILER(GCC) ^^^ / vvv !_CCCL_COMPILER(GCC) vvv
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# define _CCCL_IMMOVABLE(_XP) _XP(_XP&&) = delete
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#endif // !_CCCL_COMPILER(GCC)
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// Classes can inherit from this type to become immovable.
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struct _CCCL_TYPE_VISIBILITY_DEFAULT __immovable
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{
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_CCCL_HIDE_FROM_ABI __immovable() = default;
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_CCCL_IMMOVABLE(__immovable);
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};
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_CCCL_END_NAMESPACE_CUDA
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#include <cuda/std/__cccl/epilogue.h>
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#endif // _CUDA___UTILITY_IMMOVABLE_H
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