Grisha Levit wrote:
The manual references these values being set, not just declared, so
maybe should check for invisible_p?
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Why? I.e. what were you wanting to happen?
Noticeable for example because this works:
$ set +o posix; f() { local POSIXLY_CORRECT=; shopt -p -o posix; }; f;
shopt -p -o posix
set -o posix
set +o posix
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Yeah, you've set P_C to a null string.
But the opposite does not:
$ set -o posix; f() { local POSIXLY_CORRECT; shopt -p -o posix; }; f;
shopt -p -o posix
set -o posix
set -o posix
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The "opposite"? You aren't really showing the opposite. I.e.
wouldn't the opposite be (alias used for printing P_C & output of shopt)
alias shopos='printf "PC=%s; " $(if [[ -v POSIXLY_CORRECT ]]; then
printf " set"; else printf "unset"; fi) ;shopt -p -o posix'
set -o posix; f() { local POSIXLY_CORRECT; unset POSIXLY_CORRECT;
printf " in f: "; shopos; }; printf "bfore f: "; shopos; f ; printf
"after f: "; shopos
bfore f: PC=set; set -o posix
in f: PC=unset; set -o posix
after f: PC=set; set -o posix
(and your first example:)
set +o posix; f() { local POSIXLY_CORRECT=; printf " in f: ";
shopos; }; printf "bfore f: "; shopos; f ; printf "after f: "; shopos
bfore f: PC=unset; set +o posix
in f: PC=set; set -o posix
after f: PC=unset; set +o posix
