On 2026-07-12 11:04, Vincent Lefevre wrote: [...]
var=$(printf "A\bB\u2060C")
printf "%s\n" ${(q)var}
printf "%s\n" $var:q
the \b is quoted as $'\b', but the U+2060 WORD JOINER character
is not quoted though it is not printable. I would have expected
it to be quoted as $'\u2060'.
[[ $'\u2060' = [[:print:]] ]] returns true for me in the en_GB.UTF-8 locale of a Debian system (with glibc 2.42).
$'\u2029' is not considered as [[:print:]] and:
$ () { print -r - ${(q)1}; } $'\u2029'
$'\342\200\251'
I'd think notations like $'\u2029' should be avoided as they represent a
different sequence of bytes depending on locale.
-- Stephane