>>128
Info 見る限り明示的に無理って書いてあるね

>File: elisp, Node: Printed Representation, Next: Comments, Up: Lisp Data Types
>However, some types have no read syntax, since
>it does not make sense to enter objects of these types as constants in
>a Lisp program. These objects are printed in "hash notation", which
>consists of the characters `#<', a descriptive string (typically the
>type name followed by the name of the object), and a closing `>'. For
>example:
>
> (current-buffer)
> => #<buffer objects.texi>
>
>Hash notation cannot be read at all, so the Lisp reader signals the
>error `invalid-read-syntax' whenever it encounters `#<'.