Is there a good general-ish purpose scripting language (something like Lua on the smaller end or Python on the bigger) that’s implemented in only Rust, ideally with a relatively low number of dependencies?

Have you used it yourself, if so for what and what was your experience?

Bonus points if it’s reasonably fast (ideally JITed, though I’m not sure if that’s been done at all in Rust).

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[–] [email protected] 1 points 5 months ago

The only part of a JIT compiler I don’t understand how it works is the part that swaps in compiled routines during interpretation. That’s the point I’m unsure of how to write in Rust because it seems like it would require very custom control flow. It might be that you can handle this by storing your compiled instructions somewhere using the C calling convention and then having Rust call your compiled function like a C function.

In essence, what you have is a Rust program that has to produce machine code (easy!), store it somewhere in RAM (also easy, I think), and then somehow call it (how???). The final part seems like the difficult one since passing execution into arbitrary memory they just wrote is just the sort of thing programs aren’t normally supposed to do.