From: Bart Schaefer <schaefer@brasslantern.com>
To: Ray Andrews <rayandrews@eastlink.ca>
Cc: zsh-users@zsh.org
Subject: Re: local but persistent integer?
Date: Fri, 16 Sep 2022 14:41:29 -0700 [thread overview]
Message-ID: <CAH+w=7bV-8to91BSHYJyESPTcNQh-guSXunKrsrhBGeO4D7yBQ@mail.gmail.com> (raw)
In-Reply-To: <b1a20d70-bf98-04f4-e401-9521152d03cd@eastlink.ca>
On Fri, Sep 16, 2022 at 12:43 PM Ray Andrews <rayandrews@eastlink.ca> wrote:
>
> On 2022-09-16 10:44, Bart Schaefer wrote:
> > On Fri, Sep 16, 2022 at 8:19 AM Ray Andrews <rayandrews@eastlink.ca> wrote:
> >> integer -x start="$(( $(date +%s%N)/1000000 ))"
> >>
> >> ... I need 'start' to persist between function calls which it does
> > Given that construct, it should not.
>
> ... so it's visible externally as you say, but it's not going away either.
Hm, this is possibly a bug, but it's also possibly an expected
side-effect of "export" that I've forgotten about. My previous
statement is correct for string-scalars created with "typeset" and
"local" etc., but "integer" behaves differently. I think this is
related to preserving the attributes of the variable (i.e., even if
unset, it remains an integer, so if you assign to it again it acts
like one) about which I believe I recall some discussion, but I don't
recall when it was implemented.
In any case it's not reliable to expect locally-declared variables to
behave this way, and I'd still recommend using -g or -gH instead of
-x.
next prev parent reply other threads:[~2022-09-16 21:42 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-16 15:19 Ray Andrews
2022-09-16 17:44 ` Bart Schaefer
2022-09-16 19:43 ` Ray Andrews
2022-09-16 21:41 ` Bart Schaefer [this message]
2022-09-16 21:50 ` Ray Andrews
2022-09-17 1:51 ` Ray Andrews
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