RFC: Script Runner Library

[Ratstail91]

So I'm thinking about the potential script runner library. I'm trying to decide on how to go about it.

Currently, the engine in airport has the ability for a node to call a function that was declared in another node. This is ok as a start, but I actually want to hoist this ability into a core library, I'm just not sure how.

Here's a proposal for how it might look in the lang:

//caller.toy
import runner;

//run an external script file (must end in .toy or .tb)
var subject: opaque = runScript("./subject.toy");

//call a function from the external file, and receive any return values
subject.callScriptFn("example", "hello world");

//get a variable from the external file
var variable: int = subject.getScriptVar("variable"); //42

//must clean up the file at some point
subject.freeScript();

//subject.toy
var variable: int = 42;

fn example(arg) {
    print arg; //prints "hello world"
}

The opaque variable subject would essentially be the root-level scope of subject.toy. This would allow for type checking, etc. as well.

This is, in theory, a big change to how I've been envisioning the language so far, and would mean that the import/export feature would be deprecated and removed. The version number would also be bumped to 0.7.0.