From: ES <ruby-ml@...>
Date: 2005-06-05T23:14:58+09:00
Subject: Re: unbinding a Proc?


Le 5/6/2005, "Eric Mahurin" <eric_mahurin@yahoo.com> a �crit:
>This is mostly a curiosity thing...
>
>Is there a way to unbind a Proc from the binding it was created
>in?  What I mean by this is taking a Proc and looking
>up/calling everything it refers to outside of itself and
>replacing them with what was found - objects.  Assignments to
>the outside and method calls that modify things on the outside
>should be considered illegal.
>
>The application for doing this would be to get rid of many
>*eval(string) calls which I think are evil because you are
>parsing/recompiling code at run-time - a severe limitation to
>optimization.  I think many of the times that you use
>*eval(string) instead of *eval(proc) (or Proc#call), you do so
>because you take the values of certain variables and put it in
>the string (with #{...}).  You want these to be constant
>instead of refer to these variables in your context all the
>time.  This effectively "unbinds" those variables from their
>context.
>
>Another useful thing might be rebinding a Proc to a different
>Binding.  But, I can't think of any applications off-hand.

Proc#rebind would be very useful but I am still waiting for
a full-blown first-order method conversion, too.

E

--
template<typename duck>
void quack(duck& d) { d.quack(); }