[Help-bash] Extend the syntax to allow `declare x -a y`?

[Peng Yu]

`declare` does not allow both a scalar and an array.

$ declare x -a y
-bash: declare: `-a': not a valid identifier
$ declare x
$ declare -a y


But there seems to be no reason that this extension can not be done
and would cause ambiguities. The advantage of adding these features is
that variables can be declared by one statement. Can this feature be
added?

Also, something like this should be considered when designing syntax
to allow the declaration of both scalars and arrays. It is better to
maintain the order of the variables in the contracted form of
`declare`.

$ declare x
$ declare -a y
$ declare z

-- 
Regards,
Peng