Zsh Mailing List Archive Messages sorted by: Reverse Date, Date, Thread, Author

regression in ${##""}

X-seq: zsh-workers 29446
From: Eric Blake <eblake@xxxxxxxxxx>
To: zsh-workers@xxxxxxx
Subject: regression in ${##""}
Date: Fri, 03 Jun 2011 12:00:10 -0600
List-help: <mailto:zsh-workers-help@zsh.org>
List-id: Zsh Workers List <zsh-workers.zsh.org>
List-post: <mailto:zsh-workers@zsh.org>
Mailing-list: contact zsh-workers-help@xxxxxxx; run by ezmlm
Openpgp: url=http://people.redhat.com/eblake/eblake.gpg
Organization: Red Hat

POSIX requires ${##""} to be parsed as ${parameter#word} with parameter
of # and word of "", which results in the output of $# with the shortest
prefix of the empty string removed (aka ${#}).  But current zsh.git
rejects this:

$ ./Src/zsh -c 'set a b; echo ${##""}'
zsh:1: bad substitution

Worse, this is a regression:

$ zsh -c 'set a b; echo ${##""}'
2
$ rpm -q zsh
zsh-4.3.10-5.fc14.x86_64

-- 
Eric Blake   eblake@xxxxxxxxxx    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

Attachment: signature.asc
Description: OpenPGP digital signature

Follow-Ups:
- Re: regression in ${##""}
  - From: Mikael Magnusson

Messages sorted by: Reverse Date, Date, Thread, Author