11 Ocak 2021 Pazartesi tarihinde Chet Ramey <chet.ra...@case.edu> yazdı:
> On 1/11/21 11:33 AM, Oğuz wrote:
>
>>
>>
>> 11 Ocak 2021 Pazartesi tarihinde Chet Ramey <chet.ra...@case.edu <mailto:
>> chet.ra...@case.edu>> yazdı:
>>
>> What semantics would you choose to change?
>>
>>
>> If you are reluctant to change semantics, how about a new parameter
>> transformation to quote values using `sh_single_quote'?
>>
>
> Why, when @Q already exists?
>
Because it doesn't always work.
bash-5.1$ x=$'\n\'' y='x],b[$(uname >&2)0'
bash-5.1$ declare -A assoc=($x 23 $y 42)
bash-5.1$
bash-5.1$ (( assoc[${x@Q}]++ ))
bash: ((: assoc[$'\n\'']++ : bad array subscript (error token is
"assoc[$'\n\'']++ ")
bash-5.1$ (( assoc[${y@Q}]++ ))
bash-5.1$
bash-5.1$ shopt -s assoc_expand_once
bash-5.1$
bash-5.1$ (( assoc[${x@Q}]++ ))
bash-5.1$ (( assoc[${y@Q}]++ ))
bash: ((: assoc['x],b[$(uname >&2)0']++ : bad array subscript (error token
is "b[$(uname >&2)0']++ ")
bash-5.1$
bash-5.1$ (( assoc[$x]++ ))
bash-5.1$ (( assoc[$y]++ ))
Linux
I tried sh_single_quote like this
diff --git a/subst.c b/subst.c
index 6132316a..639b18b2 100644
--- a/subst.c
+++ b/subst.c
@@ -7786,6 +7786,9 @@ string_transform (xc, v, s)
case 'Q':
ret = sh_quote_reusable (s, 0);
break;
+ case 'S':
+ ret = sh_single_quote (s);
+ break;
case 'U':
ret = sh_modcase (s, 0, CASE_UPPER);
break;
@@ -7918,6 +7921,7 @@ valid_parameter_transform (xform)
case 'E': /* expand like $'...' */
case 'P': /* expand like prompt string */
case 'Q': /* quote reusably */
+ case 'S': /* quote reusably */
case 'U': /* transform to uppercase */
case 'u': /* tranform by capitalizing */
case 'L': /* transform to lowercase */
but if assoc_expand_once is enabled it doesn't work with a key that
contains a closing brace either. Damn.
--
> ``The lyf so short, the craft so long to lerne.'' - Chaucer
> ``Ars longa, vita brevis'' - Hippocrates
> Chet Ramey, UTech, CWRU c...@case.edu http://tiswww.cwru.edu/~chet/
>
--
Oğuz
