From: Bart Schaefer <schaefer@brasslantern.com>
To: Zsh Users <zsh-users@zsh.org>
Subject: Re: local unfunction
Date: Fri, 30 Mar 2018 22:23:20 -0700 [thread overview]
Message-ID: <CAH+w=7bZGJ71hfKTkLNzc9CyYgHc9i7DSVhR-9bi+-n85jGNog@mail.gmail.com> (raw)
In-Reply-To: <03b1320b-c248-adbe-55a3-49a3673453bd@eastlink.ca>
On Fri, Mar 30, 2018 at 5:30 PM, Ray Andrews <rayandrews@eastlink.ca> wrote:
>
> playing with Mikael's use of parenthesis -- I'd swear this is the first time
> I've seen any such thing -- and it seems too good to be true, so far it just
> works. Are there any lurking gotchas?
It's just creating a subshell, like any other time you'd put one or
more commands in parentheses.
The "lurking gotcha" is that because it is a subshell it can't affect
the parent shell in any way. That's what Mikael means by "cancel all
other side effects" which he demonstrates with a=5.
> Disadvantages? It doesn't seem any slower.
It does fork an additional process.
> BTW, just to keep flogging a dead horse:
>
> function test1 ()
> {
> echo "\none"
> whence -a "zsh"
> echo "\ntwo"
> whence -ma "zsh*"
> echo "\nthree"
> whence -m "zsh*"
> }
Try adding -w to get whence to tell you which hash table it's reading from.
next prev parent reply other threads:[~2018-03-31 5:23 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-30 16:11 Ray Andrews
2018-03-30 18:47 ` Bart Schaefer
2018-03-31 0:30 ` Ray Andrews
2018-03-31 5:23 ` Bart Schaefer [this message]
2018-03-31 14:58 ` Ray Andrews
2018-03-30 20:10 ` Mikael Magnusson
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