# File bin/el4r-instance, line 637
    def el4r_ruby2lisp(obj)
      case obj
      when nil, false; "nil"
      when true; "t"
      when String; El4r.lisp_dump_string(obj)
      when Regexp; El4r.lisp_dump_string(el4r_conv_regexp(obj))
      when Symbol; "'#{El4r.name_rb2el(obj.to_s)}"
      when Proc; el4r_rubyproc_to_lambda(&obj)
      when Integer
        (ELISP_INTEGER_RANGE === obj) or
          raise(RangeError,
                "Integer #{obj} exceed elisp limitation (#{ELISP_INTEGER_RANGE})")
        obj.to_s
      when Numeric; obj.to_s
      when Array; "(list #{el4r_args_to_lispseq(*obj)})"
      when ELObject; obj.to_lisp
      when ELExpression; obj.expression
      else; el4r_rubyobj_stock.obj2lisp(obj)
      end      
    end