Is it arbitrarily complex? Maybe nested array types, but every other type can be expressed with an indirection count, and a leaf type. That said, if it can't go

Is it arbitrarily complex? Maybe nested array types, but every other type can be expressed with an indirection count, and a leaf type. That said, if it can't go in a struct, it can easily go in a linked list with the same information for each level of indirection.