Double-optional nil comparisons seem non-intuitive

[kansaichris (Chris Frederick)]

Speaking of nested optionals, here's some more grist to the mill…

Challenge: Finding base type of nested optionals

Following on from my last challenge, this one is somewhat trickier: Given an arbitrarily-nested Optional, the goal is to programmatically identify the inner-most Wrapped type (aka. its base type). Note that the optional may be nil at any depth, and it may be wrapped in further layers of Any and/or Optional. For example, an Int??? has a base type of Int, regardless of its value. Moreover, casting an Optional to Any, and/or wrapping it in additional layers of Optional, does not change its base t…