inout Mutation

inoutMutation.swift

func doNothing(_: inout String) { /* do nothing!! */ }

var value = "foo" {
    didSet { print("didSet") }
}

doNothing(&value) // Unfortunately, triggers didSet!

var proxy: String {
    get { value }
    set { value = newValue }
}

doNothing(&proxy) // Unfortunately, triggers didSet!

var proxy2: String {
    _read { yield value }
    _modify {
        var temp = value
        yield &temp
        value = temp
    }
}

doNothing(&proxy2) // Unfortunately, triggers didSet!