From: "Andreas Röhler" <andreas.roehler@online.de>
To: Tim Cross <theophilusx@gmail.com>
Cc: Daniel Colascione <dan.colascione@gmail.com>,
Drew Adams <drew.adams@oracle.com>,
emacs-devel@gnu.org
Subject: Re: more than one prefix argument
Date: Wed, 27 Jul 2011 11:37:53 +0200 [thread overview]
Message-ID: <4E2FDC71.5070305@online.de> (raw)
In-Reply-To: <CAC=50j8Qnbn5afqAwqSjYGNy_jxUCoBpTnm7-rJPom3LV9oLnQ@mail.gmail.com>
Am 27.07.2011 11:25, schrieb Tim Cross:
[ ... ]
> While P and p are similar, I'm not sure they are as similar as you
> imply. Consider a very simple example. You have a function and you
> want it to use a prefix arg and you want the raw form because you want
> to distinguish between no prefix arg and C-u 1 or M-1. You then define
> a second function, but this time, you want it to default to 1 if no
> prefix arg or whatever the value is if one is provided, then the 'p'
> numeric version is what you want. In each case, the P and p support
> what you need
yes, but one of them would be sufficient.
OTOH we have not a handy code for branching.
Do you know case, "p" receiving M- numeric arg must fail, so C-u NUMBER
through "P" is needed?
without you having to do additional code. Yes, you could
> solve this with just the P version, but then you would have to do more
> code to handle the common case of just wanting to process the prefix
> arg as a number.
>
> This additional code
Don't suggest additional code but a better use of "P" - no parallel
implementations. Having "P" as a branch-flag not affected by "p"
would likely make the reading of the source even
> more difficult than your example issue with the use of '4' in your
> example. I would also suggest that if you don't like the literal 4 as
> it doesn't make it clear what is going on (why 4?) you could define a
> variable, such as
>
next prev parent reply other threads:[~2011-07-27 9:37 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-26 19:59 more than one prefix argument Andreas Röhler
2011-07-26 20:10 ` Daniel Colascione
2011-07-26 20:36 ` Andreas Röhler
2011-07-26 20:57 ` Drew Adams
2011-07-26 20:36 ` Drew Adams
2011-07-27 6:25 ` Andreas Röhler
2011-07-27 9:25 ` Tim Cross
2011-07-27 9:37 ` Andreas Röhler [this message]
2011-07-27 9:48 ` Tim Cross
2011-07-27 10:21 ` Andreas Röhler
2011-07-27 11:21 ` Andreas Schwab
2011-07-27 11:46 ` Andreas Röhler
2011-07-27 12:39 ` Andreas Schwab
2011-07-27 12:51 ` Tim Cross
2011-07-27 12:46 ` Tim Cross
2011-07-27 15:09 ` Drew Adams
2011-07-27 9:38 ` Tim Cross
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