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From: Peter Stephenson <p.w.stephenson@ntlworld.com>
To: Zsh hackers list <zsh-workers@zsh.org>
Subject: Re: Bug with unset variables
Date: Wed, 11 Nov 2020 17:02:48 +0000 (GMT)	[thread overview]
Message-ID: <260487802.1331953.1605114168793@mail2.virginmedia.com> (raw)
In-Reply-To: <CAMP44s29X6VBRwpwVj-anXax0UU6WRnukmUqrpoweM_cqbDdTQ@mail.gmail.com>


> On 11 November 2020 at 16:56 Felipe Contreras <felipe.contreras@gmail.com> wrote:
> If I actually do something on the foo() function:
> 
>   typeset var
>   [[ -n "$1" ]] && var=$1
>   echo "var: '${var-other}'"
> 
> I would expect two things: 1) var is not set when I exit the function,
> and 2) var is not set until I specifically set it.

If you want the variable to be regarded as both local in scope and
unset, you can

typeset var
unset var

and the scope stays local, so this is safe.

(I thought we already did something like this in emulation but I may
not be remembering correctly.)

pws


  parent reply	other threads:[~2020-11-11 17:03 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-11 15:57 Felipe Contreras
2020-11-11 16:13 ` Roman Perepelitsa
2020-11-11 16:56   ` Felipe Contreras
2020-11-11 17:02     ` Roman Perepelitsa
2020-11-11 18:03       ` Felipe Contreras
2020-11-11 18:16         ` Roman Perepelitsa
2020-11-11 20:42           ` Felipe Contreras
2020-11-12  0:20             ` Mikael Magnusson
2020-11-12  1:10               ` Felipe Contreras
2020-11-12  8:45             ` Roman Perepelitsa
2020-11-12 10:47               ` Peter Stephenson
2020-11-12 18:48                 ` Bart Schaefer
2020-11-12 19:49                 ` Felipe Contreras
2020-11-12 18:46               ` Felipe Contreras
2020-11-12 19:10                 ` Roman Perepelitsa
2020-11-12 21:08                   ` Felipe Contreras
2020-11-13  8:51                     ` Roman Perepelitsa
2020-11-14  0:52                       ` Felipe Contreras
2020-11-14  5:41                         ` Roman Perepelitsa
2020-11-16 19:41                           ` Felipe Contreras
2020-11-16 20:22                             ` Roman Perepelitsa
2020-11-17 20:28                               ` Felipe Contreras
2020-11-18 22:45                                 ` Daniel Shahaf
2020-11-22  1:20                                   ` Felipe Contreras
2020-11-23  4:00                                     ` Daniel Shahaf
2020-11-23  6:18                                       ` Felipe Contreras
2020-11-19  2:59                                 ` Bart Schaefer
2020-11-22  1:50                                   ` Felipe Contreras
2020-11-17 20:54                             ` Bart Schaefer
2020-11-22  1:49                               ` Felipe Contreras
2020-11-23  6:48                                 ` Bart Schaefer
2020-11-23  7:26                                   ` Felipe Contreras
2020-11-23 20:26                                     ` Bart Schaefer
2020-11-23 23:39                                       ` Felipe Contreras
2020-11-24  0:52                                         ` Bart Schaefer
2020-11-25  8:46                                           ` Felipe Contreras
2020-11-27 15:44                                             ` Daniel Shahaf
2020-11-27 20:49                                               ` Felipe Contreras
2020-11-27 20:59                                                 ` Daniel Shahaf
2020-11-27 21:33                                                   ` Bart Schaefer
2020-11-27 23:37                                                     ` Daniel Shahaf
2020-11-27 23:45                                                       ` Bart Schaefer
2020-11-28  0:24                                                       ` Bart Schaefer
2020-11-28  7:32                                                         ` Bart Schaefer
2020-11-28 12:05                                                         ` Felipe Contreras
2020-11-12 19:26                 ` Bart Schaefer
2020-11-12 21:48                   ` Felipe Contreras
2020-11-13 22:17                     ` Bart Schaefer
2020-11-14  0:58                       ` Felipe Contreras
2020-11-11 18:36         ` Bart Schaefer
2020-11-11 21:08           ` Felipe Contreras
2020-11-11 17:02     ` Peter Stephenson [this message]
2020-11-11 18:05       ` Felipe Contreras

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