module Virtus

  # Class-level extensions
  module ClassInclusions

    # Extends a descendant with class and instance methods
    #
    # @param [Class] descendant
    #
    # @return [undefined]
    #
    # @api private
    def self.included(descendant)
      super
      descendant.extend(ClassMethods)
      descendant.class_eval { include Methods }
      descendant.class_eval { include InstanceMethods }
      descendant.class_eval { include InstanceMethods::Constructor }
      descendant.class_eval { include InstanceMethods::MassAssignment }
    end
    private_class_method :included

    module Methods

      # Return a list of allowed writer method names
      #
      # @return [Set]
      #
      # @api private
      def allowed_writer_methods
        self.class.allowed_writer_methods
      end

      private

      # Return class' attribute set
      #
      # @return [Virtus::AttributeSet]
      #
      # @api private
      def attribute_set
        self.class.attribute_set
      end

    end # Methods

  end # module ClassInclusions
end # module Virtus