That was discussed by Apple Dev Douglas Gregor in a massive post here: https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20160229/011666.html https

That was discussed by Apple Dev Douglas Gregor in a massive post here: https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20160229/011666.html https://lists.swift.org/pipermail/swift-evolution/Week-of-Mo... It's not clear what the schedule would be but I suspect a number of the constraints changes will be in Swift 3.