Easy way to ensure all fields are non-null

[Diagoras]

Idiomatic Scala doesn't use null, so it'd be nice for there to be an easy way to guarantee that all the fields of a validated record are non-null without boiler plate field1 is notNull, field2 is notNull, etc.

[holograph]

While you can always implement a validator yourself, from a core library perspective this doesn't seem compelling (I can think of a couple of counter-arguments); implementing this with reflection goes against the grain of Accord, and a typesafe solution is too much work just for this feature.

Then again, perhaps an "iterator-style" modifier on fields? Then you can do something like p.fields.each is notNull, which might be an interesting exercise in using Shapeless (CCing @noam-almog :-)).

[Diagoras]

I agree with both avoiding reflection and that a type safe solution would be tricky, which doesn't leave a lot to work with I guess. The Shapeless solution looks good though, if it's not too much trouble.