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${parameter+word} not documented in bash.info or bash(1)

From: Martin Schwenke
Subject: ${parameter+word} not documented in bash.info or bash(1)
Date: Thu, 8 Jan 2009 14:40:29 +1100

I'm running bash 3.2.39(1)-release (under Ubuntu 8.04 (Hardy)
GNU/Linux).  Neither bash.info or bash(1) documents parameter
expansion of the form:


This is different to ${parameter:+word}, is clearly implemented by
bash and is documented in the standard (The Open Group Base
Specifications Issue 6, IEEE Std 1003.1, 2004 Edition).

This may be useful:


Thanks for bash, it rocks...  :-)

peace & happiness,

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