Not OP but I think hurt is correct. My understanding is that if you're passing return values directly into functions then there's nowhere to annotate the types

Not OP but I think hurt is correct. My understanding is that if you're passing return values directly into functions then there's nowhere to annotate the types of those values, but many (most?) people are perfectly okay with that even though you could argue that the types are being inferred (in that they're being left implicit, just as they are when you say: var gxy = g(x, y) var abc = a(b(c)) f(gxy, abc)