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//===--- Feature.cpp --------------------------------------------*- C++ -*-===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2025 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
//
//===----------------------------------------------------------------------===//
#include "swift/Basic/Feature.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Support/ErrorHandling.h"
using namespace swift;
bool Feature::isAvailableInProduction() const {
switch (kind) {
#define LANGUAGE_FEATURE(FeatureName, SENumber, Description) \
case Feature::FeatureName: \
return true;
#define EXPERIMENTAL_FEATURE(FeatureName, AvailableInProd) \
case Feature::FeatureName: \
return AvailableInProd;
#include "swift/Basic/Features.def"
}
llvm_unreachable("covered switch");
}
llvm::StringRef Feature::getName() const {
switch (kind) {
#define LANGUAGE_FEATURE(FeatureName, SENumber, Description) \
case Feature::FeatureName: \
return #FeatureName;
#include "swift/Basic/Features.def"
}
llvm_unreachable("covered switch");
}
std::optional<Feature> Feature::getUpcomingFeature(llvm::StringRef name) {
return llvm::StringSwitch<std::optional<Feature>>(name)
#define LANGUAGE_FEATURE(FeatureName, SENumber, Description)
#define UPCOMING_FEATURE(FeatureName, SENumber, Version) \
.Case(#FeatureName, Feature::FeatureName)
#include "swift/Basic/Features.def"
.Default(std::nullopt);
}
std::optional<Feature> Feature::getExperimentalFeature(llvm::StringRef name) {
return llvm::StringSwitch<std::optional<Feature>>(name)
#define LANGUAGE_FEATURE(FeatureName, SENumber, Description)
#define EXPERIMENTAL_FEATURE(FeatureName, AvailableInProd) \
.Case(#FeatureName, Feature::FeatureName)
#include "swift/Basic/Features.def"
.Default(std::nullopt);
}
std::optional<unsigned> Feature::getLanguageVersion() const {
switch (kind) {
#define LANGUAGE_FEATURE(FeatureName, SENumber, Description)
#define UPCOMING_FEATURE(FeatureName, SENumber, Version) \
case Feature::FeatureName: \
return Version;
#include "swift/Basic/Features.def"
default:
return std::nullopt;
}
}
bool Feature::isMigratable() const {
switch (kind) {
#define MIGRATABLE_UPCOMING_FEATURE(FeatureName, SENumber, Version)
#define MIGRATABLE_EXPERIMENTAL_FEATURE(FeatureName, AvailableInProd)
#define MIGRATABLE_OPTIONAL_LANGUAGE_FEATURE(FeatureName, SENumber, Name)
#define LANGUAGE_FEATURE(FeatureName, SENumber, Description) \
case Feature::FeatureName:
#include "swift/Basic/Features.def"
return false;
#define LANGUAGE_FEATURE(FeatureName, SENumber, Description)
#define MIGRATABLE_UPCOMING_FEATURE(FeatureName, SENumber, Version) \
case Feature::FeatureName:
#define MIGRATABLE_EXPERIMENTAL_FEATURE(FeatureName, AvailableInProd) \
case Feature::FeatureName:
#define MIGRATABLE_OPTIONAL_LANGUAGE_FEATURE(FeatureName, SENumber, Name) \
case Feature::FeatureName:
#include "swift/Basic/Features.def"
return true;
}
}
bool Feature::includeInModuleInterface() const {
switch (kind) {
#define LANGUAGE_FEATURE(FeatureName, SENumber, Description) \
case Feature::FeatureName: \
return true;
#define EXPERIMENTAL_FEATURE_EXCLUDED_FROM_MODULE_INTERFACE(FeatureName, \
AvailableInProd) \
case Feature::FeatureName: \
return false;
#include "swift/Basic/Features.def"
}
llvm_unreachable("covered switch");
}
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