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59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
//===--- Ownership.h - Swift ASTs for Ownership ---------------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines common structures for working with the different kinds of
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// reference ownership supported by Swift, such as 'weak' and 'unowned', as well
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// as the different kinds of value ownership, such as 'inout' and '__shared'.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_OWNERSHIP_H
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#define SWIFT_OWNERSHIP_H
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#include <stdint.h>
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namespace swift {
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/// Different kinds of reference ownership supported by Swift.
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// This enum is used in diagnostics. If you add a case here, the diagnostics
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// must be updated as well.
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enum class ReferenceOwnership : uint8_t {
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/// \brief a strong reference (the default semantics)
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Strong,
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/// \brief a 'weak' reference
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Weak,
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/// \brief an 'unowned' reference
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Unowned,
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/// \brief an 'unowned(unsafe)' reference
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Unmanaged,
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};
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/// Different kinds of value ownership supported by Swift.
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enum class ValueOwnership : uint8_t {
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/// \brief the context-dependent default ownership (sometimes shared,
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/// sometimes owned)
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Default,
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/// \brief an 'inout' mutating pointer-like value
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InOut,
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/// \brief a '__shared' non-mutating pointer-like value
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Shared,
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/// \brief an '__owned' value
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Owned
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};
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} // end namespace swift
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#endif
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