Declaring and using custom attributes in Swift

Question

I would like to be able to annotate my types and methods with meta-data and read those at runtime.

The language reference explains how to declare attribute usages,

Answer 1

If we take the iBook as definitive, there appears to be no developer-facing way of creating arbitrary new attributes in the way you can in Java and .NET. I hope this feature comes in later, but for now, it looks like we're out of luck. If you care about this feature, you should file an enhancement request with Apple (Component: Swift Version: X)

FWIW, there's really not a way to do this in Objective-C either.