On Sun, Feb 18, 2024 at 11:35 AM Bart Schaefer
<schaefer@brasslantern.com> wrote:
>
> How about this?  It skips PM_RO_BY_DESIGN for any parameter not
> declared in the same scope where "typeset -p" is being run.  This
> means that in addition to displaying parameters declared private,
> it'll show cases where "local +h" has been used to shadow a special.

The more I think through this, the more I think it's the right thing
to do.  A couple of related observations:
1) It isn't necessary to use +h unless removing the -h attribute, the
default is to retain specialness even when local.  I usually include
it just for clarity, so in case we want to add it later I've left a
comment in the patch.
2) On the other hand, it is necessary to use -h for hiding, and
typeset -p did not preserve that flag on output before.

Consequently I've revised the patch to add the -h option for
parameters that have it.  This is also consistent with the output of
${(t)var} which shows the substring "hide".  The side-effect of this
is that private parameters are shown as having the -h property, which
is a bit closer to correct.

> [...] we should probably mention
> somewhere that "typeset -p" no longer displays values for the special
> parameters $!, $#, $-, $*, $@, $$, $?, $ARGC, etc.

Doc change added for this.  Also disabled "private -p" (it had already
been removed from the documentation) and update the doc to reflect
this.

> This is actually a change in 5.9 vs. 5.8 that was not
> included in the NEWS file.

I did not edit NEWS, yet.

This replaces workers/52557.