From: Trans <transfire@...>
Date: 2005-09-07T03:36:28+09:00
Subject: Re: Change Binding of a Proc


Pit Capitain wrote:
> Trans schrieb:
> > Thanks, I'l play with it some more. Actually I realized what you meant
> > but I still had parameters to pass to the block -- and I don't see how
> > I can get those in there -- perhaps wrapping a proc in a proc?
> >
> > Any which way I slice this it seems to be messy.
>
> Feel free to send me some more code samples, maybe even with unit tests
> or another description of what you're trying to achieve. I can't promise
> it, but if I have some free time I'll take a look.
>
> Regards,
> Pit

Thanks Pit that's really nice of you. But I broke down and just turned
the procs into instance methods and had done with it. It works okay,
even though it's not what I originally had in mind.

I had want to soter those procs in a specal class, i.e.

class MyMachine
  token :tag, proc {...}, proc {...}
end

When through

  def token( name, start, stop )
    tokens << Token.new( name, start, stop )
  end

Later on I would have an instance of MyMachine, and I wanted to call on
those procs _as if_ they were defined as methods within it.

It just seems limiting that there'e no way to reassign the binding of a
proc. Is it really that tricky under the hood? It must be feasible b/c
I can define a method with a proc. So why isn't there an "invisible"
way to attach a proc to the instance level of a class --as if one were
defining a method, but not actually and then call on it elsewhere?

Hmmm... I guess what I'm asking for is a #bind method for Proc.

T.