Message 303289 - Python tracker

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Author	ssbarnea
Recipients	r.david.murray, s-wakaba, ssbarnea, vinay.sajip
Date	2017-09-28.23:42:15
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1506642135.25.0.706890279559.issue25351@psf.upfronthosting.co.za>
In-reply-to

Content
Based on my tests this worked with all shells I tested with, the syntax being a very old one and not some new/modern one. Passed: bash, zsh, dash, ksh Platforms: MacOS, RHEL Linux Failed with: tcsh but with the note that even the original code would fail with tcsh anyway. tcsh/csh are not bourne/posix compatible so there is no regression introduced by the the use of "${VAR:-}" syntax. A simple way to test the syntax with enable shell is: SHELLCMD -c 'echo "[${AAA:-}]"'

Based on my tests this worked with all shells I tested with, the syntax being a very old one and not some new/modern one. 

Passed: bash, zsh, dash, ksh
Platforms: MacOS, RHEL Linux

Failed with: tcsh but with the note that even the original code would fail with tcsh anyway. tcsh/csh are not bourne/posix compatible so there is no regression introduced by the the use of "${VAR:-}" syntax.

A simple way to test the syntax with enable shell is:
SHELLCMD -c 'echo "[${AAA:-}]"'

History
Date	User	Action	Args
2017-09-28 23:42:15	ssbarnea	set	recipients: + ssbarnea, vinay.sajip, r.david.murray, s-wakaba
2017-09-28 23:42:15	ssbarnea	set	messageid: <1506642135.25.0.706890279559.issue25351@psf.upfronthosting.co.za>
2017-09-28 23:42:15	ssbarnea	link	issue25351 messages
2017-09-28 23:42:15	ssbarnea	create