Achieving Polymorphism with Dynamic Dispatch in Zig

Zig, unlike many languages, lacks built-in interfaces. However, this doesn't preclude polymorphism. This article details a method for achieving dynamic dispatch polymorphism in Zig using vtable interfaces. This approach cleanly separates interfaces from implementations, requiring no changes to implementation types while enabling dynamic dispatch. It leverages function pointers to construct a vtable and uses an `implBy` function to connect implementations to the interface, effectively mimicking the functionality of interfaces in object-oriented languages. This allows storing different implementations in arrays or maps. While some boilerplate code is involved, the advantages are a clean, flexible, and reusable approach with minimal impact on implementation types.