feature: First class functions

[zegl]

• [x] Assign a func to a variable
• [x] Execute func from variable
• [ ] Clojures (variables outside the func are available inside the func)

[prologic]

Variables outside the func are available inside the func

Do you mean that closures are currently not supported? I also noticed that you cannot assign a module-scoped variable either; the compilation ends with a nill pointer exception.

[zegl]

Do you mean that closures are currently not supported?

Yes, exactly. The compilation of the following program will fail:

package main

import "external"

func main() {
	foo := 100
	fn := func() {
		external.Printf("foo = %d\n", foo) // error: use of undefined value '%foo-1'
	}
	fn()
}

[prologic]

Got it! Any plans to implement Closures soon? :) I'd have a crack at it myself but I'm still learning the in/outs of LLVM :/ I certainl yknow how to implement Closures as I've done in monkey-lang and mio-lang

[zegl]

I'd really like to implement closures one day, I've never implemented it in a language, so it should be a fun challenge! Inspiration to work on tre usually comes back when the winter arrives in the northern hemisphere, so I'll probably start hacking on this project again soon.

[prologic]

That timing might work out in that case :) I won't put up a PR to give you a chance to hack and learn! I need to go learn LLVM anyway so I'm using your project tre as a basis to learn from (tinygo is a bit much of a codebase to learn from!)