From: Stephane Chazelas <stephane@chazelas.org>
To: Zach Riggle <zachriggle@gmail.com>, zsh-workers@zsh.org
Subject: Re: Where is this =(:) construct documented?
Date: Fri, 11 Jun 2021 21:04:11 +0100 [thread overview]
Message-ID: <20210611200411.bheljlneq6z3ydsf@chazelas.org> (raw)
In-Reply-To: <20210611195322.4tnhhppbjpddi2tv@chazelas.org>
2021-06-11 20:53:22 +0100, Stephane Chazelas:
[...]
> info zsh "Process Substitution"
[...]
For information, searching in info (with / or s or Ctrl+S) these
days uses extended regexps. So, to search for =(, you need to
search for =\( or toggle regexp matching off first with R. See
info info / for details.
[...]
> That's the third form of process substitution.
>
> ksh introduced the first two <(...) and >(...) in the 80s. zsh
> added that third form in the 90s.
Already in ksh86. In ksh86 you could actually also use A (B) in
place of A <(B) though it looks like it was removed in later
versions. rc also had process substitution with a different
syntax IIRC.
See also:
https://unix.stackexchange.com/questions/49918/when-was-process-substitution-first-introduced/49952#49952
and
https://unix.stackexchange.com/questions/181937/how-create-a-temporary-file-in-shell-script/181996#181996
--
Stephane
next prev parent reply other threads:[~2021-06-11 20:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-11 19:17 Zach Riggle
2021-06-11 19:18 ` Zach Riggle
2021-06-11 19:53 ` Stephane Chazelas
2021-06-11 19:58 ` Roman Perepelitsa
2021-06-11 20:04 ` Stephane Chazelas [this message]
2021-06-11 20:39 ` Zach Riggle
2021-06-14 12:44 ` Vincent Lefevre
2021-06-14 14:32 ` Stephane Chazelas
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