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From: "Lawrence Velázquez" <larryv@zsh.org>
To: "Sebastian Gniazdowski" <sgniazdowski@gmail.com>
Cc: zsh-workers@zsh.org
Subject: Re: what can be global aliases used for?
Date: Fri, 17 Feb 2023 16:11:47 -0500	[thread overview]
Message-ID: <a70309b8-eb71-4e38-ad20-12bbcd4c87c3@app.fastmail.com> (raw)
In-Reply-To: <CAKc7PVAX3oJdrJDiqjxsLMH5+DaYt09dwzqA01ZBEY3rWwd_5A@mail.gmail.com>

On Fri, Feb 17, 2023, at 9:54 AM, Sebastian Gniazdowski wrote:
> I wonder what else can global aliases do?

An esoteric but amusing example:

  1) Autoconf uses ${1+"$@"} instead of "$@" to work around a bug
     in pre-SVR3 Bourne shells.

  2) This doesn't work properly in pre-4.3 zsh because SH_WORD_SPLIT
     splits ${1+"$@"} too aggressively.

  3) But zsh doesn't have a problem with "$@" in the first place,
     so Autoconf defines a global alias that dynamically replaces
     ${1+"$@"} with "$@", undoing the original workaround.



  parent reply	other threads:[~2023-02-17 21:13 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CAKc7PVA0X1786JP7g69aDP8eL+1oAZpipVC-4BNm1KV=OPxe7A@mail.gmail.com>
2023-02-17 14:54 ` Sebastian Gniazdowski
2023-02-17 17:15   ` Roman Perepelitsa
2023-02-17 19:10   ` Bart Schaefer
2023-02-17 21:11   ` Lawrence Velázquez [this message]
2023-02-17 21:19     ` Roman Perepelitsa
2023-02-17 23:27       ` Lawrence Velázquez

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