From: Sebastian Gniazdowski <sgniazdowski@gmail.com>
To: Peter Stephenson <p.stephenson@samsung.com>
Cc: zsh-workers@zsh.org
Subject: Re: Possible bug with $~pattern, (#mi)
Date: Wed, 7 Oct 2015 18:06:43 +0200 [thread overview]
Message-ID: <CAKc7PVCY5x27DuD7buR8_TKukMtzA_4_ApZv2ipMxGDb_d6KvQ@mail.gmail.com> (raw)
In-Reply-To: <20151007163901.03d561ad@pwslap01u.europe.root.pri>
True, beg wasn't set in first invocation. However pattern #(#mi)1 is correct:
# a="1234"; echo ${a/#(#mi)1/-}
-234
When beg is used (this time correctly):
# a="1234"; beg="#"; echo ${a/$~beg(#mi)1/-}
zsh: bad pattern: #(#mi)1
Best regards,
Sebastian Gniazdowski
On 7 October 2015 at 17:39, Peter Stephenson <p.stephenson@samsung.com> wrote:
> On Wed, 7 Oct 2015 17:28:04 +0200
> Sebastian Gniazdowski <sgniazdowski@gmail.com> wrote:
>> first one and third one are the same, but only first invocation works.
>> Not sure if second one should work:
>>
>> # a="1234"; beg="#" echo ${a/$~beg(#mi)1/-}
>> -234
>> # a="1234"; beg="#"; num=1; echo ${a/$~beg(#mi)$~num/-}
>> zsh: bad pattern: #(#mi)1
>> # a="1234"; beg="#" echo ${a/$~beg(#mi)1/-}
>> zsh: bad pattern: #(#mi)1
>> #
>
> The difference is the first one doesn't have $beg defined at the point
> where the expansion takes place, because beg is being put into the
> environment to use when the command is run. The environment of the
> command is not the same thing as the set of variables avaiable to the
> shell for preparing the command line.
>
> So what you're executing that works is actually
>
> a="1234"
> echo ${a/(#mi)1/-}
>
> After that, the result is self explanatory --- #(#mi) is a bad pattern
> (with EXTENDED_GLOB set).
>
> pws
next prev parent reply other threads:[~2015-10-07 16:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-07 15:28 Sebastian Gniazdowski
2015-10-07 15:39 ` Peter Stephenson
2015-10-07 16:03 ` Bart Schaefer
2015-10-07 16:06 ` Sebastian Gniazdowski [this message]
2015-10-07 16:14 ` Peter Stephenson
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