gist: 7672


  
    
      car.rb #
    
    
      
      
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              module Lib
  def self.my_attr_reader(klass, attr)
    eval %{
      class #{klass.to_s}
        def #{attr.to_s}
          'red'
        end
      end
    }
  end
end
 
class Car
  Lib::my_attr_reader(self, 'color')
end
 
c = Car.new
c.color
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