Re: All the way up or current scope

[Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>]

On Tue, May 13, 2025 at 5:09 AM Philippe Altherr
<philippe.altherr@xxxxxxxxx> wrote:
>
> One thing that would help me for creating that side-by-side comparisons is the ability to test -u0 references with a real implementation rather than simulating them in my head.

I still plan to respond to the discussion when I have a chance, but
for the sake of argument, I believe if you apply this patch, then
"setopt warn_nested_var" will (instead of warning) change the behavior
to scope "typeset -n" references in the way you suggest.

diff --git a/Src/params.c b/Src/params.c
index 7b515515e..680547938 100644
--- a/Src/params.c
+++ b/Src/params.c
@@ -6430,9 +6430,13 @@ setscope(Param pm)
                zerr("%s: global reference cannot refer to local variable",
                      pm->node.nam);
                unsetparam_pm(pm, 0, 1);
-           } else if (isset(WARNNESTEDVAR))
+           } else if (isset(WARNNESTEDVAR)) {
+               pm->base = pm->level;
+               /*
                zwarn("reference %s in enclosing scope set to local
variable %s",
                      pm->node.nam, refname);
+               */
+           }
        }
        if (refname && upscope(pm, pm->base) == pm &&
            strcmp(pm->node.nam, refname) == 0) {