Re: Where is this =(:) construct documented?

[Zach Riggle <zachriggle@xxxxxxxxx>]

Thanks for the help, all!  This was impossible to Google for!

Most obfuscated I could make it (to mess with coworkers) is...

(){<<<$1} =(:)

Zach Riggle

On Fri, Jun 11, 2021 at 3:04 PM Stephane Chazelas <stephane@xxxxxxxxxxxx> wrote:
>
> 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