From: gotoken@... (GOTO Kentaro)
Date: 2000-12-24T18:35:35+09:00
Subject: [ruby-talk:8028] Re: Question about "attr_reader" on class level variables

In message "[ruby-talk:8024] Re: Question about "attr_reader" on class level variables"
    on 00/12/24, Dave Thomas <Dave@PragmaticProgrammer.com> writes:
>> 1.  It seems like I've got to write an access method for class variables and
>> cannot use attr_reader to get one automatically created for me.  Is that 
>> correct?
>
>Yes, but you can write your own version or attr_reader for class
>variables if you want.

Yes!  This is a Ruby's charm:

  class Class
    def cattr_reader(*cvs)
      cvs.each do |cv|
        class_eval %Q[
          def self.#{cv}; @@#{cv} end
        ]
      end
    end
  end

  class Foo
    @@foo = "Root"
    @@bar = 66

    cattr_reader :foo, :bar
  end

  p [Foo.foo, Foo.bar]                   #=> ["Root", 66]

-- Gotoken