From: Alan Chen <alan@...>
Date: 2002-08-08T04:17:17+09:00
Subject: Inherited question

I'm playing around with the inherited hook and I'm having some problems.
The following code is running on "ruby 1.6.7 (2002-03-19) [i386-linux]".
It works fine when I leave the inherited def out, and explicitly register
the child class.  However, if I attempt the same with the hook, I get the
following error:

check-inherited.rb:9:in `initialize': wrong # of arguments(0 for 1) (ArgumentError)
	from check-inherited.rb:9:in `new'
	from check-inherited.rb:9:in `register'
	from check-inherited.rb:5:in `inherited'
	from check-inherited.rb:20



### check-inherited.rb

class Base
  @@childitems = {}
  
#   def self.inherited(subclass)
# 	self.register(subclass)
#   end

  def self.register(subclass)
	item = subclass.new
	@@childitems[item.name] = item
  end	

  attr_reader :name
  
  def initialize(name)
	@name = name
  end
end

class Sub1 < Base
  def initialize
	super('child_sub1')
  end
end

# not called when testing with self.inherited commented-in
Base.register(Sub1)

### end of file

-- 
Alan Chen
Digikata LLC
http://digikata.com