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Re: combining cond and let, to replace pcase.
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From: |
Richard Stallman |
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Subject: |
Re: combining cond and let, to replace pcase. |
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Date: |
Sat, 25 Nov 2023 22:14:20 -0500 |
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> > ;; Same as a clause in `cond',
> > (CONDITION
> > do-this-if-CONDITION-then-exit...)
> >
> > ;; Variables to bind, as in let
> > (:bind (x foobar) y z (foo 5) a)
> > ;; Bindings continue in effect.
> This seems nicer:
> (if CONDITION
> do-this-if-CONDITION-then-exit...
> (let ((x foobar) y z (foo 5) a)
> ...))
That is what you can do now with `if' and `let', but many levels of
nexting get to be inconvenient and hard to read. That is one of the
practical conveniences of _using_ `pcase'. I think a replacement for
`pcase' should offer the same advantage.
> It looks like everybody is trying to design a "do it all super-macro"
If that refers to the approach of `pcase', in which there are dozens
of different features one must learn, then `cond*' represents turning
away from that approach. `cond*' has just four features, two of which
are modified from `cond'.
That's why `cond*' will impose less burden of language complexity than
`pcase'.
--
Dr Richard Stallman (https://stallman.org)
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)
- Re: combining cond and let, to replace pcase., (continued)
- Re: combining cond and let, to replace pcase., Dmitry Gutov, 2023/11/19
- Re: combining cond and let, to replace pcase., Gerd Möllmann, 2023/11/19
- Re: combining cond and let, to replace pcase., Tomas Hlavaty, 2023/11/19
- Re: combining cond and let, to replace pcase., Stefan Monnier, 2023/11/24
- Re: combining cond and let, to replace pcase., Alan Mackenzie, 2023/11/19
- Re: combining cond and let, to replace pcase., Michael Heerdegen, 2023/11/21
- Re: combining cond and let, to replace pcase., Axel Forsman, 2023/11/19
- Re: combining cond and let, to replace pcase., Michael Heerdegen, 2023/11/21
- Re: combining cond and let, to replace pcase., Richard Stallman, 2023/11/22
- Re: combining cond and let, to replace pcase., Tomas Hlavaty, 2023/11/23
- Re: combining cond and let, to replace pcase.,
Richard Stallman <=
- Re: combining cond and let, to replace pcase., Tomas Hlavaty, 2023/11/27
- Re: combining cond and let, to replace pcase., Yuri Khan, 2023/11/27
- Re: combining cond and let, to replace pcase., Tomas Hlavaty, 2023/11/28
- Re: combining cond and let, to replace pcase., Manuel Giraud, 2023/11/23
- Re: combining cond and let, to replace pcase., Richard Stallman, 2023/11/25
- Re: combining cond and let, to replace pcase., Daniel Semyonov, 2023/11/23
- Re: combining cond and let, to replace pcase., Daniel Semyonov, 2023/11/23
- Re: combining cond and let, to replace pcase., Richard Stallman, 2023/11/24
- Re: combining cond and let, to replace pcase., Stefan Monnier, 2023/11/25
- Re: combining cond and let, to replace pcase., Richard Stallman, 2023/11/26