module Coco
  module Concerns
    module Extendable
      extend ActiveSupport::Concern

      class_methods do
        def inherited(subclass)
          subclass.instance_variable_set(:@_options, @_options.clone)
          subclass.instance_variable_set(:@_callbacks, @_callbacks.clone)
          subclass.instance_variable_set(:@_tag_name, @_tag_name)
          subclass.instance_variable_set(:@_tag_attr_names, @_tag_attr_names.clone)
        end
      end
    end
  end
end