The review of SE-0042 "Flattening the function type of unapplied method references" ran from March 16...21, 2016. The proposal has been *accepted*:
The core team and most of the community agree that this proposal would increase the usability of the functional features in Swift, and eliminates a class of problems that occur with inout parameters.
Thank you to Joe Groff for proposing this. I filed SR-1051 (https://bugs.swift.org/browse/SR-1051) to track implementation work for this change.