Add multi-pointer example

[karl-zylinski]

Something about how most C bindings would work fine with parameters of type ^T, but [^]T signals 'arrayness'.

Perhaps something about how returning a multi-pointer from a C procedure can be useful, making it readily indexable.

Also what the difference between [^]T and ^[]T is and how ^[]T wouldn't really work with a C binding.

• Whatever you think is important insights about multi-pointers

[2nafish117]

Ive made an example for multi-pointers, hopefully it covers most usages of multi-pointers. check pull #116