superclass

# File lib/rdoc/code_objects.rb, line 748
    def superclass
      raise NoMethodError, "#{full_name} is a module" if module?

      scope = self

      begin
        superclass = scope.classes.find { |c| c.name == @superclass }

        return superclass.full_name if superclass
        scope = scope.parent
      end until scope.nil? or TopLevel === scope

      @superclass
    end