class FactoryBot::EvaluatorClassDefiner

def evaluator_class
  @evaluator_class ||= Class.new(@parent_class).tap do |klass|
    klass.attribute_lists ||= []
    klass.attribute_lists += [@attributes]
  end
end

def initialize(attributes, parent_class)
  @parent_class = parent_class
  @attributes = attributes
  attributes.each do |attribute|
    evaluator_class.define_attribute(attribute.name, &attribute.to_proc)
  end
end