From: Christian Neukirchen <chneukirchen@gmail.com>
To: zsh-workers@zsh.org
Subject: Re: surprise with echo
Date: Sun, 21 Dec 2014 23:35:28 +0100 [thread overview]
Message-ID: <87wq5k637z.fsf@gmail.com> (raw)
In-Reply-To: <141218190653.ZM16331__11066.8365298354$1418958515$gmane$org@torch.brasslantern.com> (Bart Schaefer's message of "Thu, 18 Dec 2014 19:06:53 -0800")
Bart Schaefer <schaefer@brasslantern.com> writes:
> It's how array expansion works in the "rc" shell, which is the source
> from which this behavior is borrowed. There's probably an "rc" list
> somewhere where you might get an explanation.
Just for the sake of completeness, this actually differs between
Byron's rc and the Bell Labs rc:
% /usr/bin/rc
; echo $version
1.7.2 $Release: @(#)rc 1.7.2 2014-09-10 $
; x=()
; echo foo$x
foo
% /opt/plan9/bin/rc
% x=()
% echo foo$x
rc (/opt/plan9/bin/rc): null list in concatenation
Neither is how RC_EXPAND_PARAM works, but I think that the zsh
behavior makes most sense. (And is best enabled using foo$^x on demand.)
--
Christian Neukirchen <chneukirchen@gmail.com> http://chneukirchen.org
parent reply other threads:[~2014-12-21 22:53 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <141218190653.ZM16331__11066.8365298354$1418958515$gmane$org@torch.brasslantern.com>]
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