From: transfire@...
Date: 2006-07-10T22:13:45+09:00
Subject: Re: instance_exec


Erik Veenstra wrote:
> > Anyway, here the version I put in Facets. Please evaluate.
> >
> >   # The implementation is thread-safe thanks to the
> >   # Thread.current.object_id trick, but it doesn't work with
> >   # immediate values (Fixnums and friends),...
>
> (You're version _does_ work with immediate versions.)
>
> Mmh... The Module version does work for immediate versions,
> too. That might be a good reason... ;]
>
> Mine doesn't...
>
> >   # ...and most
> >   # importantly it bombs when given a frozen object.
> >
> >     Object.class_eval{ define_method(mname, &block) }
>
> This pollutes the global class Object. Not funny... ;] But,
> yes, it does work...

It should delete it when done, so it's a temporary pollution. But I
think to do that right, instead of undef_method that should be
remove_method:

  Object.class_eval{ remove_method(mname) } 

Good catch thanks.

T.