From: Logan Capaldo <logancapaldo@...>
Date: 2006-12-06T00:07:25+09:00
Subject: Re: How do I catch a missing method on a passed block?

On Tue, Dec 05, 2006 at 11:54:06PM +0900, Daniel Schierbeck wrote:
> On Tue, 2006-12-05 at 08:04 +0900, J2M wrote:
> > I would like to invoke method_missing on baz in this code;
> > 
> > x = Foo.new
> > x.bar { baz }
> > 
> > I tried the following, and although the method is added to the proc
> > objects singleton class, the method_missing method never gets called.
> > Is there any way to achieve this? My current code (that doesn't work)
> > is below;
> > 
> > class Foo
> > 
> >   def bar(*values, &block)
> > 
> >     if block_given?
> > 
> >       class << block
> >         def method_missing(m, *args, &block)
> >           puts "missing #{m}"
> >         end
> >       end  
> > 
> >       block.call
> > 
> >     end  
> >   end
> > end
> 
>   class Foo
>     def bar
>       yield
>     rescue NoMethodError => error
>       # mojo goes here
>     end
>   end
> 
If ruby were common lisp, that could actually work. But it's not and our
exceptions are not resuamble :).
> 
> Cheers,
> Daniel
>