Class returning as undefined about rapydscript-ng

[kovidgoyal]

You forgot new

[BruceSherwood]

Duh. And I confused what's possible within a self-contained program and in an external library. As your README says about new, "This is very useful for avoiding a common JavaScript error of creating 'undefined' objects by forgetting this keyword."

MIght it be useful to have a compile flag, say "--library", so that a Python class would be compiled to something like this?

function PhysAxis(obj, numLabels, args) {
    if (!(this instanceof PhysAxis)) return new PhysAxis(obj, numLabels, args)

Or more generally, why not always compile classes this way, and eliminate inserting "new" into calls to them? Then the transpiled program would work either as a main program or a library, wouldn't it?

[kovidgoyal]

Not worth it, IMO. Every extra output option, slows down compilation, because the result of running with it has to be cached, to enable incremental compilation. Also, it means that the function cannot be used as a generic anymore, which is common in at least some parts of the JS ecosystem, and I think it will break at least some types of multiple inheritance.

[BruceSherwood]

I obviously don't know all the ramifications, but if it were an optional flag?