From: "Bart Schaefer" <schaefer@candle.brasslantern.com>
To: Zefram <A.Main@dcs.warwick.ac.uk>,
zsh-workers@math.gatech.edu (Z Shell workers mailing list)
Subject: Re: more dependencies on emulation
Date: Thu, 18 Jul 1996 15:18:39 -0700 [thread overview]
Message-ID: <9607181518.ZM14255@candle.brasslantern.com> (raw)
In-Reply-To: Zefram <A.Main@dcs.warwick.ac.uk> "more dependencies on emulation" (Jul 18, 3:23pm)
On Jul 18, 3:23pm, Zefram wrote:
> Subject: more dependencies on emulation
> -----BEGIN PGP SIGNED MESSAGE-----
>
> There are two distinct uses of emulation addressed here. One affects
> the position of filename expansion in the order of expansion; I add a
> new option, SH_FILE_SUBST, to control this. [...]
>
> The second use of emulation is to control whether the $foo[2] subscript
> placement will work; sh and ksh don't recognise it as a subscript.
> The patch makes this be controlled by the KSH_ARRAYS option, as it should
> have been all along. The KSH_ARRAYS option is also changed to be set
> by default when emulating sh, which was previously not essential.
[....]
> + \fBSH_FILE_SUBST\fP
> + If this option is unset, it is performed
> + .I after
> + brace expansion, so things like ``~$USERNAME'' ``~{pfalstad,rc}'' will work.
Two minor nits:
If zsh were really emulating sh, arrays wouldn't work at all. So it's a
bit dubious to force ksh syntax only, given that it affects the indices
as well as the syntax.
I don't have a ksh to try this, but ~{pfalstad,rc} works fine in Bash
(that is, the ~ is expanded), even though ~$USER doesn't expand tilde.
In zsh's ksh emulation mode with this patch applied, ~$USER works, but
~{pfalstad,rc} fails unless IGNORE_BRACES is also unset. There doesn't
seem to be any way to get the Bash behavior (maybe not important), but
the manual should probably mention the IGNORE_BRACES requirement if it
is going to use ~{...} in this example.
next prev parent reply other threads:[~1996-07-18 22:23 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
1996-07-18 14:23 Zefram
1996-07-18 22:18 ` Bart Schaefer [this message]
1996-07-19 1:34 ` Zoltan Hidvegi
1996-07-19 2:59 ` Bart Schaefer
1996-07-19 14:21 ` Zefram
1996-07-19 14:17 ` Zefram
1996-07-19 14:07 ` Zefram
1996-07-19 0:12 ` Zoltan Hidvegi
1996-07-19 2:44 ` Bart Schaefer
1996-07-19 14:26 ` Zefram
1996-07-19 18:14 ` Bart Schaefer
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