Re: [PATCH] TYPESET_TO_UNSET + misc.

[Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>]

On Tue, Apr 20, 2021 at 3:01 PM Daniel Shahaf <d.s@xxxxxxxxxxxxxxxxxx> wrote:
>
> The typesettounset branch is also relevant; it has been merged into
> declarednull.

Yes, but I committed to master branch by applying the patch, not by
git wrangling.

> Worth an entry in NEWS?

Probably.  Pardon any gmail line wrapping below.

Is it worth attempting to explain that

  setopt no_typesettounset
  source =(
    setopt typesettounset
    typeset something
    typeset -p something
  )

does NOT re-create "something" as an unset variable?


diff --git a/NEWS b/NEWS
index cf270ff51..ee97868f9 100644
--- a/NEWS
+++ b/NEWS
@@ -35,6 +35,12 @@ widgets.  This corresponds to long-standing
behavior of other user ZLE
 widgets.  Use the _complete_debug widget to capture XTRACE output, or
 use "functions -T" to enable tracing of specific completion functions.

+With the new TYPESET_TO_UNSET option set, "typeset foo" leaves foo unset,
+in contrast to the default behavior which assigns foo="".  Any parameter
+attributes such as numeric type, sorting, and padding are retained until
+the parameter is explicitly unset or a conflicting value is assigned.
+This is similar to default behavior of bash and ksh.
+
 Changes from 5.7.1-test-3 to 5.8
 --------------------------------