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Re: remove empty '' in ${var@Q} result?
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From: |
Greg Wooledge |
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Subject: |
Re: remove empty '' in ${var@Q} result? |
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Date: |
Mon, 30 Oct 2017 08:35:26 -0400 |
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User-agent: |
NeoMutt/20170113 (1.7.2) |
On Mon, Oct 30, 2017 at 10:34:47AM +0800, Clark Wang wrote:
> See following example:
>
> [STEP 100] # echo $BASH_VERSION
> 4.4.12(2)-release
> [STEP 101] # v=\'\'
> [STEP 102] # printf '%q\n' "$v"
> \'\'
> [STEP 103] # printf '%s\n' "${v@Q}"
> ''\'''\'''
> [STEP 104] #
What's the bug? They are equivalent.
If you mean "I would like bash to perform a second optimization pass
over the result of ${var@Q} so that it's prettier in my degenerate edge
cases", I suspect there are better uses of Chet's time, but it's his call.