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// RUN: %target-swift-emit-silgen -module-name checked_cast_br_anyobject -parse-as-library -Xllvm -sil-full-demangle -enforce-exclusivity=checked %s
public struct BridgedSwiftObject {
var swiftMetatype : UnsafeRawPointer
var refCounts : Int64
}
public typealias SwiftObject = UnsafeMutablePointer<BridgedSwiftObject>
extension UnsafeMutablePointer where Pointee == BridgedSwiftObject {
init<T: AnyObject>(_ object: T) {
let ptr = Unmanaged.passUnretained(object).toOpaque()
self = ptr.bindMemory(to: BridgedSwiftObject.self, capacity: 1)
}
func getAs<T: AnyObject>(_ objectType: T.Type) -> T {
return Unmanaged<T>.fromOpaque(self).takeUnretainedValue()
}
}
extension Optional where Wrapped == UnsafeMutablePointer<BridgedSwiftObject> {
func getAs<T: AnyObject>(_ objectType: T.Type) -> T? {
if let pointer = self {
return Unmanaged<T>.fromOpaque(pointer).takeUnretainedValue()
}
return nil
}
}
public class Klass {}
public class Klass2 {}
// Make sure that we do not crash when emitting this code!
public func getValue(_ obj: UnsafeMutablePointer<BridgedSwiftObject>) -> AnyObject {
let v = obj.getAs(AnyObject.self)
switch v {
case let k as Klass:
return k
case let k as Klass2:
return k
default:
fatalError("unknown type")
}
}
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