dyn.js - invokedynamic-based js implementation

[Douglas Campos]

> If John plays the good guy, I will play the bad one :)
I really appreciate both - There's tons of things to learn :)

> 
> You should get rid of all the scope stuff for local variables.
> One var in Javascript should be one local variable on the Java stack.
> (if you only implement the strict mode of JavaScript 5, there is no 
> problem).
> 
> For property, you should try to map them to Java field, you can use 
> John's hidden class
> or Nashorn double tables trick and avoid hashmaps.
I'll look into this - my approach was to make it work first, make it fast later.

> 
> You should also don't use you own hierarchy of classes but try to reuse 
> j.l.Object,
> j.l.String, etc and boolean, double, void where you can, by example
> the condition of a if should be a boolean,  in x + 2, 2 should be a double.
> 
> I've some trouble to understand why your DynPrimitiveNumber is not a 
> DynNumber
I was trying to differentiate between the primitive numbers and the boxed number objects.
> and the difference between a DynAtom and a DynObject.
Given I was using my own hierarchy, I needed something common (as some js operations receive both objects and primitive types).

> DynObject.eq and DynObject.toBoolean should be implemented using 
> invokedynamic
> to adapt the sequence of if/instanceof to the callsite.

Do you mean something like issuing a indy instruction, and on the linker just call a static method passing the target object as an argument?
> 
> And at the end, all predefined Javascript objects should be re-written 
> in Javascript,
> with some native calls to Java but it will be easier for providing the 
> core API.
> By example, for javascript Number, it should be a j.l.Double but with 
> it's own vtable
> to add all Javascript predefined methods.
> The idea is that j.l.Double and Javascript Number are the same object at 
> runtime but
> are seen differently in Java and in Javascript.
Is there any other jvm lang that do the same thing? Makes sense, but I'm kinda lost on this - Do you have any recommended paper for me to read?

Thanks for taking the time :)

cheers!
-- qmx
> 
> cheers,
> Rémi
> 
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