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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift open source project
//
// Copyright (c) 2025 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
public import SWBUtil
/// An unparsed source for a macro expression.
///
/// This type encapsulates the information needed to precisely define a macro expression (which could either be or a string expression or a list expression) from a source (which could be a string or list of strings).
public enum MacroExpressionSource: Sendable {
case string(String)
case stringList([String])
}
// MARK: SerializableCodable
extension MacroExpressionSource: PendingSerializableCodable {
public init(fromLegacy deserializer: any Deserializer) throws {
try deserializer.beginAggregate(2)
switch try deserializer.deserialize() as Int {
case 0:
self = .string(try deserializer.deserialize())
case 1:
self = .stringList(try deserializer.deserialize())
case let v:
throw DeserializerError.unexpectedValue("Unexpected type code (\(v))")
}
}
public func legacySerialize<T: Serializer>(to serializer: T) {
serializer.serializeAggregate(2) {
switch self {
case .string(let value):
serializer.serialize(0 as Int)
serializer.serialize(value)
case .stringList(let value):
serializer.serialize(1 as Int)
serializer.serialize(value)
}
}
}
}
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