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126 lines
5.6 KiB
C++
126 lines
5.6 KiB
C++
//===--- Features.def - Swift Features Metaprogramming ----------*- 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 macros used for macro-metaprogramming with language
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// features.
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//
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//
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// LANGUAGE_FEATURE(FeatureName, SENumber, Description, Option)
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//
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// The LANGUAGE_FEATURE macro describes each named feature that is
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// introduced in Swift. It allows Swift code to check for a particular
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// feature with "#if $FeatureName" in source code.
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//
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// FeatureName: The name given to this feature to be used in source code,
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// e.g., AsyncAwait.
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// SENumber: The number assigned to this feature in the Swift Evolution
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// process, or 0 if there isn't one.
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// Description: A string literal describing the feature.
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// Option: either a reference to a language option in the form
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// "langOpts.<option name>" or "true" to indicate that it's always
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// enabled.
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//
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// Suppressible language features can be suppressed when printing
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// an interface without having to suppress the entire declaration they're
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// contained within. The declaration will be emitted multiple times,
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// each with a subset of the suppressible features. To avoid combinatoric
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// re-emission, we assume a linear history: later features in this file
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// imply the existence of earlier features. (This only needs to apply to
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// suppressible features.)
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//
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//===----------------------------------------------------------------------===//
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#ifndef LANGUAGE_FEATURE
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# error define LANGUAGE_FEATURE before including Features.def
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#endif
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#ifndef SUPPRESSIBLE_LANGUAGE_FEATURE
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#define SUPPRESSIBLE_LANGUAGE_FEATURE(FeatureName, SENumber, Description, Option) \
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LANGUAGE_FEATURE(FeatureName, SENumber, Description, Option)
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#endif
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#ifndef FUTURE_FEATURE
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# define FUTURE_FEATURE(FeatureName, SENumber, Version) \
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LANGUAGE_FEATURE(FeatureName, SENumber, #FeatureName, \
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langOpts.hasFeature(#FeatureName))
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#endif
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#ifndef EXPERIMENTAL_FEATURE
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# define EXPERIMENTAL_FEATURE(FeatureName) \
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LANGUAGE_FEATURE(FeatureName, 0, #FeatureName, \
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langOpts.hasFeature(#FeatureName))
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#endif
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LANGUAGE_FEATURE(AsyncAwait, 296, "async/await", true)
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LANGUAGE_FEATURE(EffectfulProp, 310, "Effectful properties", true)
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LANGUAGE_FEATURE(MarkerProtocol, 0, "@_marker protocol", true)
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LANGUAGE_FEATURE(Actors, 0, "actors", true)
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LANGUAGE_FEATURE(Actors2, 0, "actors #2 (TEMPORARY)", true)
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LANGUAGE_FEATURE(ConcurrentFunctions, 0, "@concurrent functions", true)
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LANGUAGE_FEATURE(RethrowsProtocol, 0, "@rethrows protocol", true)
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LANGUAGE_FEATURE(GlobalActors, 0, "Global actors", langOpts.EnableExperimentalConcurrency)
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LANGUAGE_FEATURE(BuiltinJob, 0, "Builtin.Job type", true)
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LANGUAGE_FEATURE(Sendable, 0, "Sendable and @Sendable", true)
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LANGUAGE_FEATURE(BuiltinExecutor, 0, "Builtin.Executor type", true)
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LANGUAGE_FEATURE(BuiltinContinuation, 0, "Continuation builtins", true)
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LANGUAGE_FEATURE(BuiltinHopToActor, 0, "Builtin.HopToActor", true)
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LANGUAGE_FEATURE(BuiltinTaskGroupWithArgument, 0, "TaskGroup builtins", true)
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LANGUAGE_FEATURE(InheritActorContext, 0, "@_inheritActorContext attribute", true)
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LANGUAGE_FEATURE(ImplicitSelfCapture, 0, "@_implicitSelfCapture attribute", true)
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LANGUAGE_FEATURE(BuiltinBuildExecutor, 0, "Executor-building builtins", true)
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LANGUAGE_FEATURE(BuiltinBuildMainExecutor, 0, "MainActor executor building builtin", true)
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LANGUAGE_FEATURE(BuiltinCreateAsyncTaskInGroup, 0, "MainActor executor building builtin", true)
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LANGUAGE_FEATURE(BuiltinMove, 0, "Builtin.move()", true)
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LANGUAGE_FEATURE(BuiltinCopy, 0, "Builtin.copy()", true)
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LANGUAGE_FEATURE(BuiltinStackAlloc, 0, "Builtin.stackAlloc", true)
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SUPPRESSIBLE_LANGUAGE_FEATURE(SpecializeAttributeWithAvailability, 0, "@_specialize attribute with availability", true)
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LANGUAGE_FEATURE(BuiltinAssumeAlignment, 0, "Builtin.assumeAlignment", true)
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SUPPRESSIBLE_LANGUAGE_FEATURE(UnsafeInheritExecutor, 0, "@_unsafeInheritExecutor", true)
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SUPPRESSIBLE_LANGUAGE_FEATURE(PrimaryAssociatedTypes2, 346, "Primary associated types", true)
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SUPPRESSIBLE_LANGUAGE_FEATURE(UnavailableFromAsync, 0, "@_unavailableFromAsync", true)
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SUPPRESSIBLE_LANGUAGE_FEATURE(NoAsyncAvailability, 340, "@available(*, noasync)", true)
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FUTURE_FEATURE(ConciseMagicFile, 274, 6)
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FUTURE_FEATURE(ForwardTrailingClosures, 286, 6)
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FUTURE_FEATURE(BareSlashRegexLiterals, 354, 6)
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EXPERIMENTAL_FEATURE(StaticAssert)
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EXPERIMENTAL_FEATURE(VariadicGenerics)
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EXPERIMENTAL_FEATURE(NamedOpaqueTypes)
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EXPERIMENTAL_FEATURE(FlowSensitiveConcurrencyCaptures)
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EXPERIMENTAL_FEATURE(MoveOnly)
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EXPERIMENTAL_FEATURE(OneWayClosureParameters)
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EXPERIMENTAL_FEATURE(TypeWitnessSystemInference)
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/// Enable extensions of (sugared) bound generic types
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///
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/// \code
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/// extension [Int] { /**/ }
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/// \endcode
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EXPERIMENTAL_FEATURE(BoundGenericExtensions)
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/// Whether to enable experimental differentiable programming features:
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/// `@differentiable` declaration attribute, etc.
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EXPERIMENTAL_FEATURE(DifferentiableProgramming)
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/// Whether to enable forward mode differentiation.
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EXPERIMENTAL_FEATURE(ForwardModeDifferentiation)
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/// Whether to enable experimental `AdditiveArithmetic` derived
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/// conformances.
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EXPERIMENTAL_FEATURE(AdditiveArithmeticDerivedConformances)
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#undef EXPERIMENTAL_FEATURE
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#undef FUTURE_FEATURE
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#undef SUPPRESSIBLE_LANGUAGE_FEATURE
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#undef LANGUAGE_FEATURE
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