On Sat, Jan 24, 2026 at 11:13:37PM +0700, Robert Elz wrote:
> Date: Sat, 24 Jan 2026 09:24:20 +0100
> From: Andreas =?utf-8?B?S8OkaMOkcmk=?= <[email protected]>
> Message-ID: <[email protected]>
>
> | On Sat, Jan 24, 2026 at 03:10:28AM +0100, Denys Vlasenko wrote:
> | > The subject says it all.
>
> | And $(()) is expanded to 0. What would you suggest would happen?
>
> At least in posix mode, both should be rejected as errors. Since they
> are errors, neither 0x nor "" (I mean nothing) is a valid C expression,
> it is not necessarily invalid for a shell to allow them as extensions.
> But they are extensions, and in posix mode really should be rejected,
> so application writers can better test their scripts for better portabillity.
>
> kre
Well, it's at least consistent with
$ declare -i v=
$ echo $v
0
--
Matti Andreas Kähäri
Uppsala, Sweden
.
