Re: [parrot] parrot prototype OO?

[chromatic]

It's difficult to say what's going on without seeing code, but if I were to do this, I'd write a Prototype PMC in PIR that subclasses the Class PMC and overrides find_method(). You can also override its add_parent() when you clone an instance, so that the new instance can look back to its parent for non-overridden methods.

[jepri]

There's not a lot of code - I was just trying parrot as-is, using only the provided PMCs. Thanks for the tip on PMCs, I wasn't sure if it were possible to write a full PMC in PIR.

Now that I know rolling my own PMCs is the way to go, I'll go that way. Could you suggest an example of a PMC written in PIR? I'm only finding ones written in C.

Edit: I just found your FizzBuzz article, working through that now.

[jepri]

Hmmm, find_method seems to be called on the superclass, and not the class (or on the class and not the object). So if I try to use, say, objects, should I return a method that inspects the object (and its parent* slots) and then calls the correct method? Because that sounds like I'm implementing AUTOLOAD.

Here's my naive code. I don't seem to be making good use of the class machinery so far:

.namespace [ 'MyStuff'; 'TestProt' ]

.sub 'autoload' :method
  #inspect object and parents here
.end

.sub 'find_method' :vtable
  .param pmc arg0
  .param pmc arg1
  .local pmc autoload
  new_method = find_name 'autoload'
  .return(new_method)
.end

.sub main :main
$P1 = new [ 'MyStuff'; 'TestProt']
$P1.hi()


.end