That's history substitution, not parameter expansion:


*$ ls foobar*
*...*
*$ !!:s/o/e/:G*
*ls feebar*



On Mon, Feb 12, 2024 at 9:19 AM Joachim Ansorg <mail@bashsupport.com> wrote:

> Hi,
> I was reading about modifiers on page
> https://zsh.sourceforge.io/Doc/Release/Expansion.html#Modifiers, which
> says:
>
> >   The forms ‘gs/l/r’ and ‘s/l/r/:G’ perform global substitution, i.e.
> substitute every occurrence of r for l. Note that the g or :G must appear
> in exactly the position shown.
>
> But zsh 5.9 doesn't seem to support this:
>   > value="/dir/subdir/file.csv"
>   > echo ${value:s/dir/_/:G}
>   zsh: unrecognized modifier `G'
>
> Is ":G" actually supported or is the documentation outdated here?
> I might be overlooking something very simple, though.
>
> Thank you!
> Joachim Ansorg
> --
> BashSupport Pro
> https://www.bashsupport.com/
>
>

-- 
Mark J. Reed <markjreed@gmail.com>