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52c46f838a
Allow a conformance to be "isolated", meaning that it stays in the same isolation domain as the conforming type. Only allow this for global-actor-isolated types. When a conformance is isolated, a nonisolated requirement can be witnessed by a declaration with the same global actor isolation as the enclosing type.
61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
//===--- ProtocolConformanceOptions.h - Conformance Options -----*- 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 - 2020 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 the options for protocol conformances.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_AST_PROTOCOLCONFORMANCEOPTIONS_H
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#define SWIFT_AST_PROTOCOLCONFORMANCEOPTIONS_H
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#include "swift/Basic/OptionSet.h"
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namespace swift {
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/// Flags that describe extra attributes on protocol conformances.
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enum class ProtocolConformanceFlags {
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/// @unchecked conformance
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Unchecked = 0x01,
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/// @preconcurrency conformance
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Preconcurrency = 0x02,
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/// @unsafe conformance
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Unsafe = 0x04,
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/// @retroactive conformance
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Retroactive = 0x08,
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/// @isolated conformance
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Isolated = 0x10,
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// Note: whenever you add a bit here, update
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// NumProtocolConformanceOptions below.
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};
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/// Options that describe extra attributes on protocol conformances.
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using ProtocolConformanceOptions =
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OptionSet<ProtocolConformanceFlags>;
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inline ProtocolConformanceOptions operator|(
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ProtocolConformanceFlags flag1,
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ProtocolConformanceFlags flag2) {
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return ProtocolConformanceOptions(flag1) | flag2;
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}
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enum : unsigned {
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NumProtocolConformanceOptions = 5
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};
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} // end namespace swift
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#endif
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