Ah, amazing project! Congratulations. I was just writing under another thread that we support any and unknowns in two different ways. First, most any and unknowns are lazy programming—if you trace the call graph you can prove they have concrete types, or used only in one shape. If we can't prove a type narrows properly, we lower it to a boxed dynamic value carrier so it doesn't block compilation. Like JSON.parse—for this we have a special syntax, you can do JSON.parse(x) as T, to define the type, and if you don't it becomes a dynamic value whose price you pay only for that site / variable.

We also have limited support for `new Function("...")` via a small evaluator written in C++ that parses and runs the generated body. We mainly built this for Fastify's generated routing functions so it doesn't support classes, asynchronous, destructuring, etc, but conditionals, loops, variable declarations etc work.

There is no "eval" yet, but the same support shape could be added for it too, as the mechanism is already there.

The approaches and the limitations are documented here:

https://github.com/geastack/compiler/blob/main/docs/EVAL.md https://github.com/geastack/compiler/blob/main/docs/DYNAMIC-...