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Re: [Help-bash] Confused by =~ behavior with regards to quoting

From: Chet Ramey
Subject: Re: [Help-bash] Confused by =~ behavior with regards to quoting
Date: Fri, 17 Oct 2014 10:27:16 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:24.0) Gecko/20100101 Thunderbird/24.6.0

On 10/17/14, 9:44 AM, Greg Wooledge wrote:

> [[ $1 = +([0-9]) ]]
> And you don't even have to enable extglob here -- for some reason,
> even with extglob disabled, this particular case *still* works.

Since the [[ command is defined to use extended globbing for the =
operator, bash enables it unconditionally while executing matches.
It's for compatibility with other shells that implement [[.

``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    address@hidden

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