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74 lines
2.4 KiB
C++
74 lines
2.4 KiB
C++
//===--- Feature.h - Helpers related to Swift features ----------*- 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 - 2025 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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#ifndef SWIFT_BASIC_FEATURES_H
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#define SWIFT_BASIC_FEATURES_H
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#include "llvm/ADT/StringRef.h"
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#include <optional>
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namespace swift {
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class LangOptions;
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/// Enumeration describing all of the named features.
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enum class Feature : uint16_t {
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#define LANGUAGE_FEATURE(FeatureName, SENumber, Description) FeatureName,
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#include "swift/Basic/Features.def"
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};
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constexpr unsigned numFeatures() {
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enum Features {
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#define LANGUAGE_FEATURE(FeatureName, SENumber, Description) FeatureName,
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#include "swift/Basic/Features.def"
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NumFeatures
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};
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return NumFeatures;
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}
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/// Check whether the given feature is available in production compilers.
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bool isFeatureAvailableInProduction(Feature feature);
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/// Determine the in-source name of the given feature.
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llvm::StringRef getFeatureName(Feature feature);
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/// Determine whether the first feature is more recent (and thus implies
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/// the existence of) the second feature. Only meaningful for suppressible
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/// features.
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inline bool featureImpliesFeature(Feature feature, Feature implied) {
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// Suppressible features are expected to be listed in order of
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// addition in Features.def.
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return (unsigned) feature < (unsigned) implied;
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}
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/// Get the feature corresponding to this "future" feature, if there is one.
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std::optional<Feature> getUpcomingFeature(llvm::StringRef name);
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/// Get the feature corresponding to this "experimental" feature, if there is
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/// one.
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std::optional<Feature> getExperimentalFeature(llvm::StringRef name);
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/// Get the major language version in which this feature was introduced, or
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/// \c None if it does not have such a version.
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std::optional<unsigned> getFeatureLanguageVersion(Feature feature);
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/// Determine whether the given feature supports adoption mode.
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bool isFeatureAdoptable(Feature feature);
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/// Determine whether this feature should be included in the
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/// module interface
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bool includeInModuleInterface(Feature feature);
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}
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#endif // SWIFT_BASIC_FEATURES_H
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