From: Emanuel Berg <incal@dataswamp.org>
To: help-gnu-emacs@gnu.org
Subject: Re: pcase on multiple conditions
Date: Sun, 30 Oct 2022 13:55:58 +0100 [thread overview]
Message-ID: <875yg15v35.fsf@dataswamp.org> (raw)
In-Reply-To: 87fsf82xzu.fsf@web.de
Michael Heerdegen wrote:
>>> Is this the way to test for two values to perform the
>>> same operation?
>>>
>>> (pcase complt
>>> ((or 3 4)
>>> (myfunc)))
>>
>> With `or' it will become true if any of values is true.
>
> `pcase' patterns are not values. Your interpretation of the
> semantics of this `or` pattern is wrong.
The syntax and semantics are not easy to understand but here
is an example of `pcase' use that should be simple enough, at
least what it does and how to use it.
(defun insert-mail (&optional delim)
(interactive "P")
(pcase-let ((`(,delim-beg ,delim-end) (if delim '("<" ">") '("" ""))))
(insert (format "%s%s%s" delim-beg user-mail-address delim-end)) ))
;; (insert-mail) ; incal@dataswamp.org
;; (insert-mail t) ; <incal@dataswamp.org>
--
underground experts united
https://dataswamp.org/~incal
next prev parent reply other threads:[~2022-10-30 12:55 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-28 6:47 pcase on multiple conditions Heime
2022-10-28 7:08 ` Jean Louis
2022-10-28 7:44 ` Michael Heerdegen
2022-10-28 9:57 ` Heime
2022-10-28 10:39 ` Michael Heerdegen
2022-10-28 12:05 ` Jean Louis
2022-10-28 12:47 ` Michael Heerdegen
2022-10-28 13:14 ` Stefan Monnier via Users list for the GNU Emacs text editor
2022-10-30 12:58 ` Emanuel Berg
2022-10-30 16:29 ` Jean Louis
2022-10-30 12:55 ` Emanuel Berg [this message]
2022-10-30 12:53 ` Emanuel Berg
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