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Re: excess braces ignored: bug or feature ?
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From: |
Chet Ramey |
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Subject: |
Re: excess braces ignored: bug or feature ? |
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Date: |
Sun, 19 Feb 2012 14:46:58 -0500 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:8.0) Gecko/20111105 Thunderbird/8.0 |
On 2/17/12 2:51 PM, Mike Frysinger wrote:
> can't tell if this is a bug or a feature.
>
> FOO= BAR=bar
> : ${FOO:=${BAR}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}
> echo $FOO
>
> i'd expect an error, or FOO to contain those excess braces. instead, FOO is
> just "bar".
Neither. That's just how parameter expansion works. The braces are
contained in the remainder of the word expansion.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU chet@case.edu http://cnswww.cns.cwru.edu/~chet/