Composition and inheritance: the Julian way

[ChrisRackauckas]

@Raf

This is a rule I’m going to take on from now on: methods in shared packages should always dispatch on abstract types. Never on concrete types.

It really wasn’t entirely clear to me before this. It should be in the docs in bold all caps somewhere. Dispatching on concrete types is locking in implementation details and making lots of useless replication for anyone trying to extend types.

Yup, or even just let anything go.

Type-Dispatch Design: Post Object-Oriented Programming for Julia - Stochastic...