From: cibercitizen1 <CiberCitizen1@...>
Date: 2008-11-26T21:00:23+09:00
Subject: Re: attr_reader, default attribute value, and rdoc of attribute


I don't know about rdoc, but perhaps the following might help.
See first class Test and usage, to find out if this is
what you need

#!/usr/bin/env ruby

#-----------------------------------------------
#-----------------------------------------------
module MyAccessor
  def my_attribute (nou, defval=nil)
    if defval == nil
      code ="def #{nou} (s=nil)
        @#{nou} = s || @#{nou}
      end"
    elsif defval.class==String
      code ="def #{nou} (s=nil)
        @#{nou} = s || @#{nou} || '#{defval}'
      end"
    else
      code ="def #{nou} (s=nil)
        @#{nou} = s || @#{nou} || #{defval}
      end"
    end
    puts "defining ", code
    class_eval code
  end # def my_attr
end # module


#----------------------------------------
class Test

	extend MyAccessor

 	my_attribute(:color, "red")
	my_attribute(:width, 20)
	my_attribute(:text, "no name")


	def initialize (&block)
		instance_eval(&block)
	end
end

#----------------------------------
# usage

puts " -------------- "
t = Test.new {
	color "blue"
}
puts " -------------- "

puts t.color # => blue
puts t.width # => 20
puts t.text # => no name

t.width 50

puts t.width # => 50