From: Trans <transfire@...>
Date: 2006-12-06T14:02:22+09:00
Subject: Re: Method Namespace


Pit Capitain wrote:
> Tom, could you try this version?
>
>    def namespace( mod, &blk )
>
>      # If block is given then create a module, otherwise
>      # get the name of the module.
>      if block_given?
>        name = mod.to_s
>        mod  = Module.new(&blk)
>      else
>        name = mod.basename.downcase
>        mod  = mod.dup
>      end
>
>      # Include the module. This is neccessary, otherwise
>      # Ruby won't let us bind the instance methods.
>      include mod
>
>      # Save the instance methods of the module and
>      # replace them with a "transparent" version.
>      methods = {}
>      mod.instance_methods(false).each do |m|
>        methods[ m.to_sym ] = mod.instance_method(m)
>        mod.instance_eval do
>          define_method(m) do
>            super
>          end
>        end
>      end
>
>      # Add a method for the namespace that delegates
>      # via the Functor to the saved instance methods.
>      define_method(name) do
>        Functor.new(methods) do |op, mtab, *args|
>          mtab[op].bind(self).call(*args)
>        end
>      end
>    end

Bloody hek, that's a clever solution. Works like a charm. Pit Captain,
you never cease to amaze!  I'm putting this in Facets to replace the
weak SimpleDelegtor I had been using. 

Thanks!
T.