On 2024-04-01 09:20, Roman Perepelitsa wrote:
> It doesn't seem super useful to be honest. The semantics are odd, too.
> What should this do?
>
>      shift
>      set blah
>      unshift
>
> Or this?
>
>      foo=(42)
>      shift foo
>      integer foo
>      unshift
>
> There is no obvious answer, only options with pros and cons. The path
> from a special-purpose hack to a general solution is long and arduous.
>
Sure, that's what I expected to here.  Come to that, I've never used 
shift for anything other than the positionals which is all I'm 
considering, but if there was an unshift it would obviously have to be 
globally useful not, as you say, some single use hack.  And since the 
hack is easy, your way or Stephane's, the functionality is already there.