From: Robert Klemme <shortcutter@...>
Date: 2008-01-22T19:47:35+09:00
Subject: Re: ruby wish-list

2008/1/21, Roger Pack <rogerpack2005@gmail.com>:
> Next wish for the magic lamp:
> a command that does something like
> module X
>  CONSTANT = '3'
>  def class_function
>  end
> end
>
> class Y
>  extend_and_include_constants X # this one
> end

That's not too hard.  All the ingredients are there already:

irb(main):001:0> class Module
irb(main):002:1>   def your_extend(mod)
irb(main):003:2>     extend mod
irb(main):004:2>     mod.constants.each do |co|
irb(main):005:3*       const_set(co, mod.const_get(co))
irb(main):006:3>     end
irb(main):007:2>   end
irb(main):008:1> end
=> nil
irb(main):009:0> module X
irb(main):010:1>   Foo = 2
irb(main):011:1>   def mm; 1; end
irb(main):012:1> end
=> nil
irb(main):013:0> class Y
irb(main):014:1>   your_extend X
irb(main):015:1> end
=> ["Foo"]
irb(main):016:0> Y.mm
=> 1
irb(main):017:0> Y::Foo
=> 2

Cheers

robert

-- 
use.inject do |as, often| as.you_can - without end