[goless]

I'm not sure if this is a new form of state machine.

If you look at the code here you'll see that the select state uses some functions from the parameter state.

https://github.com/sdzx-1/ray-game/blob/master/src/select.zi...

So you can see that the select state itself is incomplete, and the parameter state completes it.

It doesn't seem to be any of the 3 described above.

Perhaps it is reasonable to call it semantic composition.

[goless]

Here I must mention the great advantage of the Zig language: it has the expressiveness of a dynamic language and the type safety of a static language.