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Re: cond* vs pcase
From: |
Arthur Miller |
Subject: |
Re: cond* vs pcase |
Date: |
Tue, 06 Feb 2024 13:30:17 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) |
Philip Kaludercic <philipk@posteo.net> writes:
> "Alfred M. Szmidt" <ams@gnu.org> writes:
>
>> I use pcase often; but I use it just as a better cond. For example I find
>> this
>> handy:
>>
>> (defvar foo nil) <-- foo is some symbol
>>
>> (pcase foo
>> ('bar (do-some-bar-stuff))
>> ('baz (do-some-baz-fluff)))
>>
>> cl-case seems more appropriate here (wish cl-case was just case ...)
>
> Why more appropriate? I always think of pcase as Elisp's case. In
> addition, pcase avoids the danger of naively writing
>
> (cl-case foo
> ('bar (do-some-bar-stuff))
> ('baz (do-some-baz-fluff)))
>
> and then getting surprised when foo evaluates to `quote'.
>
>> or this:
>>
>> (setq foo "some-string")
>>
>> (pcase foo
>> ("foo" (do-foo-case))
>> ("bar" (do-bar-case)))
>>
>> Same here, with (intern foo) ...
>
> Being able to do equal instead of eql is also something that speaks in
> favour of pcase...
Thanks Philip; that was an useful detail you pointed out. And thanks Alfred for
the suggestion too. I actually wanted to ask the same question as Philip, but I
didn't had time last night.
But what I am most thinking of, is this kind of quesionts and detail for people
to learn, and now we can add yet another case-like construct and perhaps
slightly
different behaviour in similar cases, and there will be even more mine fields
for people to watch out and debug.
- cond* vs pcase, Arthur Miller, 2024/02/05
- Re: cond* vs pcase, Eli Zaretskii, 2024/02/05
- Re: cond* vs pcase, Alfred M. Szmidt, 2024/02/05
- Re: cond* vs pcase, Philip Kaludercic, 2024/02/05
- Re: cond* vs pcase,
Arthur Miller <=
- Re: cond* vs pcase, Alfred M. Szmidt, 2024/02/06
- RE: [External] : Re: cond* vs pcase, Drew Adams, 2024/02/06
- Re: cond* vs pcase, Philip Kaludercic, 2024/02/06
- Re: cond* vs pcase, Alfred M. Szmidt, 2024/02/06
- Re: cond* vs pcase, Philip Kaludercic, 2024/02/06
- Re: cond* vs pcase, Alfred M. Szmidt, 2024/02/06
- Re: cond* vs pcase, Philip Kaludercic, 2024/02/06
- RE: [External] : Re: cond* vs pcase, Drew Adams, 2024/02/06
- RE: [External] : Re: cond* vs pcase, Drew Adams, 2024/02/06
- RE: [External] : Re: cond* vs pcase, Adam Porter, 2024/02/06