Re: [PATCH] Document ${(!)refname}

[Bart Schaefer <schaefer@brasslantern.com>]

On Thu, Jul 6, 2023 at 11:45 PM Jun T <takimoto-j@kba.biglobe.ne.jp> wrote:
>
> % typeset -n ptr=var
> % echo $(\!t)ptr}
> nameref
>
> Probably something like the following,
> "When the parameter being expanded is a named reference, do not
> resolve to its referent but use its own value."
>
> At the end of the subsection "Named References" in zshexpn(1)
> (expn.yo:1614), there is a description of ${(t)ptr}.
> How about adding a description of $(!t)ptr} here?

Perhaps this?

diff --git a/Doc/Zsh/expn.yo b/Doc/Zsh/expn.yo
index 7bc736470..4285aa4c1 100644
--- a/Doc/Zsh/expn.yo
+++ b/Doc/Zsh/expn.yo
@@ -987,6 +987,11 @@ means the same thing

 startitem()
+item(tt(!))(
+When the parameter being expanded is a named reference, the reference
+itself is examined and thus is em(not) resolved to its referent.  In
+ksh emulation, the parens around this flag are optional.
+)
 item(tt(#))(
 Evaluate the resulting words as numeric expressions and interpret
 these as character codes.  Output the corresponding characters.  Note
@@ -1245,7 +1250,8 @@ item(tt(hideval))(
 for parameters with the `hideval' flag (tt(-H))
 )
 item(tt(nameref))(
-for named references having an empty value (tt(-n))
+for named references either having an empty value (tt(-n)) or when combined
+with `tt(!)' as in `tt(${LPAR()!t)tt(RPAR()var(rname)})'
 )
 item(tt(special))(
 for special parameters defined by the shell