Add support for modules

[JeanJPNM]

Because fery few other compilers did that. Also, this requires changes on the sourcemapping format and the name handling and resolution.

[Sharlottes]

Because fery few other compilers did that.

yes, so we need to make a kinds of "macro" like C's #include or "bundler" like webpack

[hsaturn]

I (very) often need this feature with mlogjs !

Why not just include a file (at the parser level) ?
import 'module.js';

This would just read the concatenate module.js to the rest of the file (the compiler should even not know that a module was imported).

(I'm not an expert at all in javascript)

[JeanJPNM]

Why not just include a file (at the parser level) ?

Because mlogjs doesn't actually do the parsing by itself, it uses babel to parse the code and then traverses the AST (Abstract Syntax Tree) that babel generated.

The are a few things that are in the way of implementing modules:

• Implementing a module resolution algorithm (needs the path of the input file and needs to give the compiler access to the file system, instead of just giving it to the CLI)
• Implementing import views (see this stackoverflow answer)
• Updating the sourcemaps feature to handle multiple files
• Make all of it compatible with the web environment so that it works on the online editor

And while module support is within my priorities, I find it more important to implement the optimizer first, as that will eliminate many bugs in the current implementation and possibly make handling modules more straightforward in some aspects.