Arbitrary array shapes

[cortner]

Can we have a simple way to allow arbitrary array shapes as inputs, use maybe PtrArrays to reshape them, then evaluate them as if they were vectors and then reshape the outputs accordingly?

Similarly, can we drop all codes that allow only a single input?

[cortner]

@CheukHinHoJerry -- maybe this is something you could do quite easily? But low priority.

[CheukHinHoJerry]

I will try to do this with product basis when I have time. After confirming that it works well we can clean up the remaining.

does that sounds good to you?

[cortner]

sure! but as I said - very low priority for now ...