mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
d51c58a6f9
Merge `$<Feature>` and `hasFeature` implementations.
- `$<Feature>` did not support upcoming language features.
- `hasFeature` did not support promoted language features and also
didn't take into account `Options` in `Features.def`.
Remove `Options` entirely, it was always one of three cases:
- `true`
- `langOpts.hasFeature`
- `hasSwiftSwiftParser`
Since `LangOptions::hasFeature` should always be used anyway, it's no
longer necessary. `hasSwiftSwiftParser` can be special cased when adding
the default promoted language features (by removing those features).
Resolves rdar://117917456.
74 lines
2.4 KiB
C++
74 lines
2.4 KiB
C++
//===--- Feature.h - Helpers related to Swift features ----------*- C++ -*-===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See https://swift.org/LICENSE.txt for license information
|
|
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef SWIFT_BASIC_FEATURES_H
|
|
#define SWIFT_BASIC_FEATURES_H
|
|
|
|
#include "llvm/ADT/Optional.h"
|
|
#include "llvm/ADT/StringRef.h"
|
|
|
|
namespace swift {
|
|
|
|
class LangOptions;
|
|
|
|
/// Enumeration describing all of the named features.
|
|
enum class Feature {
|
|
#define LANGUAGE_FEATURE(FeatureName, SENumber, Description) FeatureName,
|
|
#include "swift/Basic/Features.def"
|
|
};
|
|
|
|
constexpr unsigned numFeatures() {
|
|
enum Features {
|
|
#define LANGUAGE_FEATURE(FeatureName, SENumber, Description) FeatureName,
|
|
#include "swift/Basic/Features.def"
|
|
NumFeatures
|
|
};
|
|
return NumFeatures;
|
|
}
|
|
|
|
/// Determine whether the given feature is suppressible.
|
|
bool isSuppressibleFeature(Feature feature);
|
|
|
|
/// Check whether the given feature is available in production compilers.
|
|
bool isFeatureAvailableInProduction(Feature feature);
|
|
|
|
/// Determine the in-source name of the given feature.
|
|
llvm::StringRef getFeatureName(Feature feature);
|
|
|
|
/// Determine whether the first feature is more recent (and thus implies
|
|
/// the existence of) the second feature. Only meaningful for suppressible
|
|
/// features.
|
|
inline bool featureImpliesFeature(Feature feature, Feature implied) {
|
|
// Suppressible features are expected to be listed in order of
|
|
// addition in Features.def.
|
|
return (unsigned) feature < (unsigned) implied;
|
|
}
|
|
|
|
/// Get the feature corresponding to this "future" feature, if there is one.
|
|
llvm::Optional<Feature> getUpcomingFeature(llvm::StringRef name);
|
|
|
|
/// Get the feature corresponding to this "experimental" feature, if there is
|
|
/// one.
|
|
llvm::Optional<Feature> getExperimentalFeature(llvm::StringRef name);
|
|
|
|
/// Get the major language version in which this feature was introduced, or
|
|
/// \c None if it does not have such a version.
|
|
llvm::Optional<unsigned> getFeatureLanguageVersion(Feature feature);
|
|
|
|
/// Determine whether this feature should be included in the
|
|
/// module interface
|
|
bool includeInModuleInterface(Feature feature);
|
|
|
|
}
|
|
|
|
#endif // SWIFT_BASIC_FEATURES_H
|