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From: Zhu Zihao <all_but_last@163.com>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: Zhu Zihao <all_but_last@163.com>, emacs-devel@gnu.org
Subject: Re: Any convenient way for cl-generic to dispatch on a callable Lisp Object?
Date: Mon, 20 Apr 2020 23:32:41 +0800	[thread overview]
Message-ID: <87pnc29nqe.wl-all_but_last@163.com> (raw)
In-Reply-To: <jwv8siq2snj.fsf-monnier+emacs@gnu.org>

Thanks for your reply.

I add a custom generalizer for funcall-able Lisp Object now

(cl-generic-define-generalizer rstream--callable-generalizer
  51 (lambda (name &rest _)
       `(when (functionp ,name)
          'rstream-callable))
  (lambda (tag &rest _)
    (when (eq tag 'rstream-callable)
      (list tag))))

(cl-defmethod cl-generic-generalizers ((_specializer (eql rstream-callable)))
  "Support for `stream' specializers."
  (list rstream--callable-generalizer))





  reply	other threads:[~2020-04-20 15:32 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-20  8:55 Any convenient way for cl-generic to dispatch on a callable Lisp Object? Zhu Zihao
2020-04-20 13:44 ` Stefan Monnier
2020-04-20 15:32   ` Zhu Zihao [this message]
2020-04-20 15:39   ` Zhu Zihao

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