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From: Michael Heerdegen <michael_heerdegen@web.de>
To: Emacs mailing list <help-gnu-emacs@gnu.org>
Subject: Generic functions: Specializers like `or' or `memq'?
Date: Wed, 03 Nov 2021 18:17:11 +0100	[thread overview]
Message-ID: <87r1bxcg6g.fsf@web.de> (raw)

Hello,

I come back to this question again and again, so it's time to just ask:

Often I want to use a certain method implementation for several very
similar cases and want to avoid code duplication, but I don't know how
to express this using the existing method specializers.

For example, I want the `head' spec to match one of several symbols who
are synonymous.  Or instead of (eql SYM) I would rather want
(memq (SYMS...)).  Or I want to combine several SPECS using `or' because
the implementation is the same.

Am I'm missing something or - this is not possible currently, right?
Would it be possible to implement such stuff then?

TIA,
Michael.



             reply	other threads:[~2021-11-03 17:17 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-03 17:17 Michael Heerdegen [this message]
2021-11-03 18:21 ` Generic functions: Specializers like `or' or `memq'? Philip Kaludercic
2021-11-03 21:10   ` Michael Heerdegen
2021-11-03 21:32     ` Eric Abrahamsen
2021-11-03 23:19       ` Michael Heerdegen
2021-11-03 23:38         ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-04  0:26           ` Michael Heerdegen
2021-11-04  1:31       ` Stefan Monnier via Users list for the GNU Emacs text editor
2021-11-04  2:34         ` Stefan Monnier via Users list for the GNU Emacs text editor
2021-11-04  4:01           ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-06 22:32         ` Michael Heerdegen
2021-11-06 23:36           ` Stefan Monnier via Users list for the GNU Emacs text editor
2021-11-07  1:48             ` Michael Heerdegen
2021-11-21 19:43               ` Stefan Monnier via Users list for the GNU Emacs text editor
2021-11-23  8:16                 ` Michael Heerdegen
  -- strict thread matches above, loose matches on Subject: below --
2021-11-04 17:31 Eric Abrahamsen
2021-11-05 21:17 ` Stefan Monnier via Users list for the GNU Emacs text editor
2021-11-05 21:36   ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-06 23:29     ` Stefan Monnier via Users list for the GNU Emacs text editor
2021-11-06 23:52       ` Emanuel Berg via Users list for the GNU Emacs text editor

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