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From: Bart Schaefer <schaefer@brasslantern.com>
To: Peter Stephenson <p.w.stephenson@ntlworld.com>
Cc: Philippe Altherr <philippe.altherr@gmail.com>,
	Zsh hackers list <zsh-workers@zsh.org>
Subject: Re: Subscript flag (i) not working correctly on empty strings?
Date: Fri, 6 Jan 2023 10:12:17 -0800	[thread overview]
Message-ID: <CAH+w=7Z5=ncO6JXa=qhbXkXkpC_3V5gBSv4eCv=ASXjYmT1zVA@mail.gmail.com> (raw)
In-Reply-To: <361494476.8470860.1673025799682@mail.virginmedia.com>

On Fri, Jan 6, 2023 at 9:24 AM Peter Stephenson
<p.w.stephenson@ntlworld.com> wrote:
> > On 06/01/2023 16:01 Philippe Altherr <philippe.altherr@gmail.com> wrote:
> >
> > > s=; echo $s[(i)z];
> >
> > > 0
> >
> > Why is the last line 0 and not 1?
> Certainly looks plain wrong.
> None of the existing tests fail with this change.

I thought there was a discussion about this at some point in the past
... but it may have been limited to array cases.  I have the feeling
we concluded that (i) and (I) should produce the same result on empty
string for purposes of boolean tests, but I can't find such a
conversation in the archives.  I remain a little concerned that some
scripts are going to unexpectedly break, but can't point to anything,
and $anUnsetName[(i)z] returns nothing rather than 0, so it's probably
an unfounded worry.

  reply	other threads:[~2023-01-06 18:13 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-06 16:01 Philippe Altherr
2023-01-06 17:23 ` Peter Stephenson
2023-01-06 18:12   ` Bart Schaefer [this message]
2023-01-07 13:45     ` Philippe Altherr
2023-01-07 13:52       ` Roman Perepelitsa
2023-01-07 13:54         ` Roman Perepelitsa
2023-01-08 19:47     ` Peter Stephenson

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