Path: csiph.com!au2pb.net!usenet.blueworldhosting.com!feeder01.blueworldhosting.com!news.glorb.com!usenet.stanford.edu!not-for-mail
From: Eduardo =?utf-8?Q?A=2E_Bustamante_L=C3=B3pez?= <dualbus@gmail.com>
Newsgroups: gnu.bash.bug
Subject: Re: extglob syntax error in function definition
Date: Wed, 7 Oct 2015 22:44:20 -0500
Lines: 21
Approved: bug-bash@gnu.org
Message-ID: <mailman.0.1444275868.12154.bug-bash@gnu.org>
References: <20151006122732.3006A264E1A@mail.jonkmans.nl>
NNTP-Posting-Host: lists.gnu.org
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Cc: bug-bash@gnu.org, bash@packages.debian.org
To: bashbug@jonkmans.nl
Envelope-to: bug-bash@gnu.org
Mail-Followup-To: bashbug@jonkmans.nl, bug-bash@gnu.org, bash@packages.debian.org
Content-Disposition: inline
In-Reply-To: <20151006122732.3006A264E1A@mail.jonkmans.nl>
User-Agent: Mutt/1.5.23 (2014-03-12)
Precedence: list
Xref: csiph.com gnu.bash.bug:11585

> Repeat-By:
> 	shopt -u extglob
> 	isnum () ( shopt -s extglob; case "$1" in  [1-9]*([0-9])) return 0 ;; *) return 1 ;; esac; )

Remember that bash parses and interprets the script line-by-line. If you want
to change the parser's operation (for example, have it recognize the extglob
patterns), you have to do it in a different line than where you're using the
special syntax.

If you have: shopt -s extglob; ls @(foo|bar)

in the same line, it first processes the complete line, and fails at the
extglob, before getting to execute the shopt command.


This is not a bug btw, it's just a consequence of how bash works.

-- 
Eduardo Bustamante
https://dualbus.me/