# File bin/el4r-instance, line 510
    def el(expression)
      case expression
      when Symbol; ELExpression.new(El4r.name_rb2el(expression.to_s))
      when String; ELExpression.new(expression)
      when ELExpression; expression
      else
        raise(TypeError,
              "Cannot treat as lisp expression: <#{expression.inspect}>")
      end
    end