From: oinkoink+unet@... (Bret Jolly)
Date: 2003-03-18T09:09:13+09:00
Subject: Re: Is there a ruby equivalent of "using" to help with namespaces?

Try Rob Partington's 'with.rb'

# Copyright 2000, Rob Partington <ruby@frottage.org>
# Released under the GPL

class Object
	attr_reader :curObj
	@curObj = []
	
	def with(*args)
		@curObj = [] if curObj == nil

		if block_given?
			@curObj.push(args[0])
			yield
			@curObj.pop
		end
	end

	def method_missing(method, *args)
		methname = method.id2name
		if @curObj.size 
      if args.size > 0
  			@curObj[-1].send(methname, args)
      else
        @curObj[-1].send(methname)
      end
		end
	end
end
-------------------->8 snip 8<---------------------------

Example of usage:
require "with"

class Fish
	attr_reader :type, :name

	def initialize(type, name="percy")
		@type=type
		@name=name
	end
	
	def moo(*args)
		return "#{name} (a #{type}) says moo and #{args[0]}\n"
	end
end

a=Fish.new("halibut")
b=Fish.new("turbot", "martin")
c=Fish.new("hake")

with (a) { print moo("[default]"); print b.moo("[other object]") }
with (b) { 
	print moo("pre-nest") 
	with (c) { print moo("nested") }
	print moo("post-nest")
}
-------------------------->8 snip 8<-------------------------------
Regards, Bret
Bret Jolly (Jou Lii Bair)
http://www.rexx.com/~oinkoink/