On Apr 23, 2021, at 1:10 PM, Brian Goetz <brian.go...@oracle.com<mailto:brian.go...@oracle.com>> wrote:
I think the concern on the part of the null-fearers is not so much the O(n) scan (though that's a concern), as much as the subtle difference between `case Object o` and `default`. They are almost identical, except in null. No one likes having to carry that distinction around in their head. I mildly disagree with this last point: I think that distinction will cause mild pain to learn, and zero point zero zero pain to carry around for the rest of one’s career. I can feel the rule growing in my own head: “default means old-school null rejection, a null case label means null acceptance, if both are present the null case label of course wins.” Could this explicit null-ing be MaKing the New nUlls Stand Out? — John
