wrapper override

wrapper.rb

class Array::Wrapper
  def self.inherited(subclass)
    real_subclass = Class.new(Array::Wrapper)
    
    %x{
      subclass._proto = real_subclass._proto;
      subclass._alloc = real_subclass._alloc;
      
      subclass.$new = real_subclass.$new;
      subclass['$[]'] = real_subclass['$[]'];
    }
  end
end