Ona Script Closures #41

New Issue

kayomn · 2023-09-02T21:11:20+02:00

kayomn commented

2023-09-02 21:11:20 +02:00

Add the ability to reference variables from the outer scope and have the compiler / runtime automatically resolve references which escape the local stack lifetime.

Closures could be implemented via Lua-like upvalues, however given that the program has a full AST representation this could be taken advantage of to create site-specific lexical scopes that only contain the closed-on variables in a far less runtime heavy manner.

My anticipation is that the following code:

let message = "This is a closure"

let pr = lambda (str):
  @print(message)
  @print(str)
end

pr("Hello world")

May be restructured into the equivalent logic by the AST.

let message = "This is a closure"

let pr = _create_closure({message}, lambda (_closure_context, str):
  @print(_closure_context[0])
  @print(str)
end)

pr("Hello world")

Add the ability to reference variables from the outer scope and have the compiler / runtime automatically resolve references which escape the local stack lifetime. Closures could be implemented via Lua-like upvalues, however given that the program has a full AST representation this could be taken advantage of to create site-specific lexical scopes that only contain the closed-on variables in a far less runtime heavy manner. My anticipation is that the following code: ```ruby let message = "This is a closure" let pr = lambda (str): @print(message) @print(str) end pr("Hello world") ``` May be restructured into the equivalent logic by the AST. ```ruby let message = "This is a closure" let pr = _create_closure({message}, lambda (_closure_context, str): @print(_closure_context[0]) @print(str) end) pr("Hello world") ```

kayomn added this to the (deleted) milestone 2023-09-02 21:11:20 +02:00

kayomn self-assigned this 2023-09-02 21:11:20 +02:00

kayomn changed title from ~~Closures~~ to Ona Script Closures

2023-09-02 21:15:50 +02:00

kayomn referenced this issue

2023-09-02 23:22:56 +02:00

Constant Folding for Let Variables in Ona Script #42

kayomn commented

2023-11-05 16:53:31 +01:00

Resolved as part of #44.

kayomn closed this issue

2023-11-05 16:53:31 +01:00