From the D Blog: The Amazing Compile-Time Metaprogramming State Machine

[Mike Parker via Digitalmars-d-announce]

A new blog post from Jared Hanson is live. In this one, he shows 
how to use D's compile-time features to create a type-safe, 
compile-time implementation of the Builder pattern.

https://blog.dlang.org/2026/05/05/the-amazing-compile-time-state-machine/