class Widget
  class << self
    def define(&block)
      DefinedBy::DSL(&block).map do |key, value, dsl_block|
        define_class(key.to_s.camelize, self).class_eval <<-EOF
          def initialize(attributes = {})
            attributes[:name] ||= #{key.to_s.inspect}
            attributes[:description] ||= #{value.to_s.inspect}
            super(attributes)
          end
        EOF
      end
    end
  end

  attr_accessor :name, :description

  def initialize(attributes = {})
    attributes.each do |key, value|
      self.send("#{key.to_s}=", value)
    end
  end
end

def Widget(&block)
  Widget.define(&block)
end