Inheritance and Traits

Julia (and in general, all modern languages like Rust or Go) implement Object Oriented Programming (OOP) in a rather restricted form compared to popular OOP languages like Java, C++ or Python. In particular, they forbid structural inheritance; i.e. inheriting fields from parent superclass(es).

In recent years, structural inheritance has increasingly been considered a bad practice, favouring composition instead.

Julia design space on this topic is not completely clear. Julia has abstract types, which can be "inherited" but do not have fields and can't be instantiated, and concrete types, which cannot be inherited from them but have fields and can be instantiated. In this sense, implementing methods with Julia's abstract types act as some kind of polymorphic base class.

As of the time of writing, the type hierarchy of Tenet looks like this:

DocumenterMermaid.MermaidBlock([...])

DocumenterMermaid.MermaidScriptBlock([...])