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Re: Parameter Expansion Bug

X-seq: zsh-workers 823
From: Zoltan Hidvegi <hzoli@xxxxxxxxxx>
To: esky@xxxxxxxxxxx (Eskandar Ensafi)
Subject: Re: Parameter Expansion Bug
Date: Wed, 13 Mar 1996 21:57:08 +0100 (MET)
Cc: zsh-workers@xxxxxxxxxxxxxxx (zsh-workers)
In-reply-to: <9603132004.AA08513@xxxxxxxxxxxxxxxxxxxx> from "Eskandar Ensafi" at Mar 13, 96 12:04:10 pm
Organization: Dept. of Comp. Sci., Eotvos University, Budapest, Hungary
Phone: (36 1)2669833 ext: 2667, home phone: (36 1) 2752368

> The following does not work properly in zsh-2.6-beta12.  Please note that

I cannot reproduce it under beta13-hzoli13.  Note that expansion is quite
buggy in the vanilla version.  I rewrote most of it so I have no idea what
causes this in the old code.

> myhost% foo () { echo "${argv##^-*}" }    # Show only -option arguments.

Probably you wanted "${argv[@]##^-*}" here.  Without [@] array elements are
joined together using $IFS[1] and the result is used with ##.  Alternatively
you can omit the double quotes.

Also use print -r -- instead of echo for testing as echo processes some
options.

> myhost% foo -a -b a f                     # OK. Ouput was -a -b as expected.
> -a -b

No, the expected output is -a -b a f.

Cheers,

Zoltan

References:
- Parameter Expansion Bug
  - From: Eskandar Ensafi

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