Binary operator '|' cannot be applied to two UIViewAutoresizing operands

Question

The OptionSetType got an updated syntax for Swift 2.x and another update for Swift 3.x

Swift 3.x

view.autoresizingMask = [.flexibleWidth, .flexibleHeight]

Swift 2.x

view.autoresizingMask = [.FlexibleWidth, .FlexibleHeight]

This are the differences between Swift 1.2 and 2:

// swift 1.2
view.autoresizingMask = .FlexibleWidth | .FlexibleTopMargin

// swift 2
view.autoresizingMask = [.FlexibleWidth, .FlexibleTopMargin]

Try with xcode7-b6:

view.autoresizingMask = UIViewAutoresizing.FlexibleWidth.union(UIViewAutoresizing.FlexibleHeight)

For Swift 3 Xcode 8 b1:

view.autoresizingMask = [.flexibleWidth, .flexibleHeight]

actual for swift 3.0.2:

view.autoresizingMask = [.layerWidthSizable, .layerHeightSizable]