Larry Wall wrote:
>   You must
>  specify @foo[[;]@bar] or @foo[()] <== @bar to get the special mark.

I'm uncomfortable with the  specific syntax of @a[()] because generated 
code might sometimes want to generate an empty list, and special-casing 
that sort of thing is always a pain (and fragile). An empty list of 
subscripts should return an empty slice.

What this mark is really trying to say is "The definition of the indices 
is coming from elsewhere". I'm wondering if these semtantics would make 
it appropriate to use the yada operator here:

    @foo[...] <== @bar;


Dave.