Implicit promotion of Optional

[masters3d]

Nice find but I guess those were "only vague notions." ;) I guess this is called "implicit promotion". Maybe @Ben_Cohen can update his 2014 article now that we is part of the core team. :)

Implicitly converting functions to return optionals

I guess the teams was planning some work in this area.

Please remove obscure "!" requirements for implicitly unwrapped optionals

This is a separate problem. One of the things we plan to discuss (once things settle down a bit) is how to narrow the implicit conversion from T to T? in cases like this. This implicit promotion, as well as the T <-> T! promotions are problematic in a number of ways, and we need a holistic solution to them. We have several specific ideas, but Joe Pamer is driving the effort and he is preoccupied with personal things for the next several weeks. -Chris

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On Dec 4, 2015, at 5:00 PM, Per Melin…