[Grace-core] A module proposal

[James Noble]

Éric --- thanks for that.


> The cool things include ways to import a module but renaming the imported elements (or just add a prefix), say that you export everything you defined except X and Y, rename/prefix your elements on export, etc.

yeah that's quite interesting...

> http://docs.racket-lang.org/guide/modules.html
> 
> In the case of Racket that scales especially well, including for linguistic abstractions (macros), so language extensions/restrictions can be defined using the exact same mechanisms.
> 
> Hope this helps, and sorry for the noise if that was already on your radar.

it was on the radar but I hadn't looked at it closely, so thanks.

It's conceptually clean, importing & exporting names, with a unix file & directory
like module structure.  But with renaming & prefixing on both import & export it 
seems a bit complicated. 

I have another iteration of "objects-as-modules" in my head that I'll try to type up soon

James