> On Jan 25, 2017, at 8:40 AM, Nichi Shin via swift-evolution > <swift-evolution@swift.org> wrote: > > I’d like to propose a new operator for optional assignment in Swift. > > The idea is that by using this operator (e.g. by doing a ?= b), the optional > on the right would be assigned to the variable on the left only when it has > something to assign (i.e. when it's not nil).
`a? = b` already does this. Maybe we need a fixit to make that more apparent, though. -Joe > > The implementation could be something as follows: > > /// Optional Assignment Operator > infix operator ?=: AssignmentPrecedence > > func ?=<T>(left: inout T, right: T?) { > if right != nil { > left = right! > } > } > > func ?=<T>(left: inout T?, right: T?) { > if right != nil { > left = right > } > } > > I hope you will consider adding this on a future release of this great > programming language. > > Kind regards, > N. S. > _______________________________________________ > swift-evolution mailing list > swift-evolution@swift.org > https://lists.swift.org/mailman/listinfo/swift-evolution _______________________________________________ swift-evolution mailing list swift-evolution@swift.org https://lists.swift.org/mailman/listinfo/swift-evolution