NSManagedObject inherited CoreData class and Sendable

Cyclic · February 12, 2022, 12:56am

apple/swift/blob/5ecfe2afa55ac7cd6c3592503fa2393ac8f96879/lib/Sema/TypeCheckConcurrency.cpp#L4199-L4211


      
          if (!isInherited) {
            // A 'Sendable' class cannot inherit from another class, although
            // we allow `NSObject` for Objective-C interoperability.
            if (auto superclassDecl = classDecl->getSuperclassDecl()) {
              if (!superclassDecl->isNSObject()) {
                classDecl->diagnose(
                    diag::concurrent_value_inherit,
                    nominal->getASTContext().LangOpts.EnableObjCInterop,
                    classDecl->getName());
                return true;
              }
            }
          }

Based on the lines in the link above, it appears that classes auto-generated by CoreData are unable to conform to the Sendable protocol, like this:

@objc (MyFoo)

public class MyFoo: NSManagedObject, Identifiable, Sendable {

What can I do to MyFoo to ensure that it's thread safe, and compatible with Swift Concurrency?