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Re: "shell-expand-line" wrongly(?) expanded $'foo' to $foo
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From: |
Chet Ramey |
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Subject: |
Re: "shell-expand-line" wrongly(?) expanded $'foo' to $foo |
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Date: |
Wed, 1 Jul 2020 15:38:59 -0400 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 |
On 7/1/20 8:48 AM, Clark Wang wrote:
> See the following example (tested with bash 5.0.7):
>
>
> # bind -q shell-expand-line
> shell-expand-line can be invoked via "\e\C-e".
>
> # echo $PWD # press ESC C-e
> # echo /root
>
> # echo $( pwd ) # press ESC C-e
> # echo /root
>
> # echo $'foo' # press ESC C-e
> # echo $foo
>
>
> Is this a bug?
I suppose it is. $'...' isn't a word expansion, it's a form of quoting that
gets translated and transformed into '...' by the parser. When the word
expansion code sees $'...', unexpectedly, it just performs the usual quote
removal.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/