From: Stephane Chazelas <stephane.chazelas@gmail.com>
To: Bart Schaefer <schaefer@brasslantern.com>
Cc: Zsh hackers list <zsh-workers@zsh.org>
Subject: Re: (#m) and "case" alternation
Date: Tue, 11 Nov 2014 17:43:26 +0000 [thread overview]
Message-ID: <20141111174326.GD4343@chaz.gmail.com> (raw)
In-Reply-To: <141111074407.ZM30753@torch.brasslantern.com>
2014-11-11 07:44:07 -0800, Bart Schaefer:
> On Nov 11, 12:54pm, Stephane Chazelas wrote:
> }
> } Some unexpected behaviour:
> }
> } $ case abc in ((#m)a* | b*) echo $MATCH; esac
>
> It shouldn't be unexpected, because it's documented:
>
> m
> Set references to the match data for the entire string matched;
> this is similar to backreferencing and does not work in filename
> generation. THE FLAG MUST BE IN EFFECT AT THE END OF THE PATTERN,
> i.e. NOT LOCAL TO A GROUP.
>
> (all-caps mine).
OK, but in:
case abc in (#m)a* | b*) echo $MATCH; esac
my understanding was that we've got two patterns as that's the
"|" case alternation operator, not the "|" glob operator (with
which you can't have spaces on either side)..
Now, it looks like my understanding is wrong as
$ case bcd in ((#b)(a*) | (#b)(b*)) print -l "$match[@]";;esac
bcd
(bcd is in $match[2], so the second group of a *single*
pattern).
So thanks for the clarification, you may disregard my report.
--
Stephane
next prev parent reply other threads:[~2014-11-11 17:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-11 12:54 Stephane Chazelas
2014-11-11 13:23 ` Mikael Magnusson
2014-11-11 15:44 ` Bart Schaefer
2014-11-11 17:43 ` Stephane Chazelas [this message]
2014-11-11 17:59 ` Peter Stephenson
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