The Zig code returns any `type`, it's impossible to say what that is without looking at the implementation. It can be different types completely depending on the comptime arguments.

But I agree it probably returns a struct type.

Assuming that's the case, you're right and the equivalent would be:

Zig:

    fn ArrayListType(comptime T: type) type {

D:

    ArrayList!T ArrayListType(T)() {

But now the D version is more specific about what it returns, so it's still not exactly equivalent.