[pypy-dev] translating classes to javascript

[Maciek Fijalkowski]

John Smith wrote:
>
>     > I'm fairly new to pypy and was only doing some experimenting
>     with the
>     > javascript translator so far. First of all let me say that the
>     whole
>     > project is pretty amazing!
>     >
>     > After translating a couple of functions I tried translating a
>     class,
>     > but was unsuccessful so far but since the docs mention supporting
>     > inheritance I guess this should be possible. Is it?
>     >
>     > For instance if I have in RPython the following:
>     >
>     > class test:
>     >     def __init__( self, value ):
>     >         self.value = value
>     >     def meth1( self ):
>     >         return self.value
>     >     def meth2( self ):
>     >         do_something_which_is_translatable( )
>     >
>     > then how do I get the corresponding javascript code? Since the docs
>     > say jscompile should be invoked by 'jscompile module
>     function_names'
>     > I'm kind of lost. The same holds for rpython2javascript it
>     expects a
>     > list of functions.
>     >
>     > Any insight or comment would be very helpful.
>     >
>
>     Because usual way of invoking javascript on your browser is to call a
>     function, you need a function where you'll begin. Like:
>
>
>     # class test as above
>
>     def f():
>         test_instance = test(3)
>         test_instance.meth()
>
>     and translate function f. Your class will magically appear in
>     translated
>     javascript.
>
>
> Thanks very much for the reply, I can certainly do things this way 
> however being able to call methods directly sounds like a reasonable 
> thing to me (both in python and in JS). Are there plans for adding 
> this kind of functionality or there are reasons why you think this is 
> not necessary?
>
Yes there are plans for such support, while there was no time to 
implement it yet :-( The list of ideas lay down here: 
http://codespeak.net/pypy/dist/pypy/doc/js/todo.html

Cheers,
fijal