Candid code generation for nullable types

[peterparker]

@rossberg

This distinction needs to be expressible on the JS side as well, which is why it cannot simply encode options as null | T . Instead, it uses an array of 0 or 1 element (though that’s just a choice we made, e.g., null | [T] would have worked as well).

Thanks for the explanation! In that case, wouldn’t had it worked out using undefined in addition to null and the proper value?

export interface MemberWithProfile {
  member? : null | User;
}

P.S.: I’ve got a similar question / feed about the same topic.