require 'set'
module Taggable
attr_accessor :tags
def taggable_setup
@tags = Set.new
end
def add_tag(tag)
@tags << tag
end
def remove_tag(tag)
@tags.delete(tag)
end
end
module Taggable2
def initialize(a,b,c)
end
end
class TaggableString < String
include Taggable
def initialize(*args)
super
taggable_setup
end
end
s = TaggableString.new('this is a test.')
s.add_tag 'A'
s.add_tag 'B'
s.tags