I thought the special pass given to append, make, and delete depends on the special nature of slices and maps. That is, a []Whatever is not as opaque as a What

I thought the special pass given to append, make, and delete depends on the special nature of slices and maps. That is, a []Whatever is not as opaque as a Whatever{} or an interface{}. Same with a map[Foo]Bar, you (you being Go) know it's a map. (I have no opinion on whether Go should have generics, I just think the apparent exceptions make sense even if they might seem unfair.)