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Re: (format "Hello %1$S%2$s" 'world "!")
From: |
Clément Pit-Claudel |
Subject: |
Re: (format "Hello %1$S%2$s" 'world "!") |
Date: |
Sun, 2 Jul 2017 13:25:43 -0400 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.1.1 |
On 2017-07-02 12:54, Noam Postavsky wrote:
> On Sun, Jul 2, 2017 at 12:32 PM, Clément Pit-Claudel
> <address@hidden> wrote:
>>> Why would we need a new function since %n$ would be an error for the old
>>> format anyway?
>>
>> This in itself is a good reason to have a new function. A new function lets
>> you migrate existing code, including plugins, to the new syntax, and load
>> the polyfill in older Emacsen. A new syntax that causes errors in old
>> Emacsen isn't usable by anyone outside of Emacs core, for fear of
>> compatibility problems.
>
> We can still give a new name I suppose.
I think it would be nice, if we also write a polyfill. If we don't intend to
write one, then there's probably no point.
>> The ones I'm familiar with use $1, {1}, or similar syntax,
>
> What's the equivalent of %1$d in that syntax? Or is it just strings?
{1:d} (this one is Python).
>> but I've never seen %1$s :/
>
> It's a POSIX extension to C's printf [1,2], also used by Java [3] and perl
> [4].
>
> [1]: http://pubs.opengroup.org/onlinepubs/9699919799/functions/printf.html
> [2]: https://en.wikipedia.org/wiki/Printf_format_string
> [3]: https://docs.oracle.com/javase/7/docs/api/java/util/Formatter.html
> [4]: https://perldoc.perl.org/functions/sprintf.html
Then I guess it's good enough :) Maybe I just need to get used to that syntax.
Clément.
- Re: prin1 / princ vs message ?, (continued)
- Re: prin1 / princ vs message ?, Philipp Stephani, 2017/07/02
- Re: prin1 / princ vs message ?, Jean-Christophe Helary, 2017/07/02
- (format "Hello %1$S%2$s" 'world "!"), Clément Pit-Claudel, 2017/07/02
- Re: (format "Hello %1$S%2$s" 'world "!"), Jean-Christophe Helary, 2017/07/02
- Re: (format "Hello %1$S%2$s" 'world "!"), Noam Postavsky, 2017/07/02
- Re: (format "Hello %1$S%2$s" 'world "!"), Clément Pit-Claudel, 2017/07/02
- Re: (format "Hello %1$S%2$s" 'world "!"), Noam Postavsky, 2017/07/02
- Re: (format "Hello %1$S%2$s" 'world "!"),
Clément Pit-Claudel <=
- Re: (format "Hello %1$S%2$s" 'world "!"), Vivek Dasmohapatra, 2017/07/02
Re: prin1 / princ vs message ?, Stefan Monnier, 2017/07/02