Module: Concrete

Included in:
IndexedNode, LabeledNode
Defined in:
lib/concrete.rb

Overview

Include this module in an abstract class to make it concrete and so, to be able to instantiate it again. This module can be included if and only if the Abstract module has been included before in one of the class’ superclass.

Class Method Summary collapse

Class Method Details

.included(klass) ⇒ Object 



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# File 'lib/concrete.rb', line 9

def self.included(klass)
  super
  unless klass.include?(Abstract)
    raise(TypeError, "#{klass} - not an abstract class")
  end
  klass.module_eval do
    class << self
      visibility = instance_method_visibility('new')
      def new(*args, &block)
        concrete_new(*args, &block)
      end
      send(visibility, :new)
    end

    def is_a?(klass)
      klass == Abstract ? false : super(klass)
    end
  end
end