? versus ifSome

[endofunk]

@Ling_Wang

I only see one returning Array. I mean if Sequence.reversed() returns the same Sequence type(Self)—which feels very natural—the problematic code won't compile at all. There must be good reasons that the current API returns Array instead of Self(same for sorted()), what are they?

Picking up from @Ling_Wang's above question the ifSome method defaults to Range<Int> and in turn to ReverseCollection<Range<Int>>, where as ? optional chaining in your code failure example defaults to ReverseCollection<[Int]> -- implying optional chaining picks the wrong reverse method.

Is this bug logged?