Swift Goes Toward

Goes Toward.swift

infix operator --> {associativity right precedence 90 assignment }
func --><T : IntegerType>(inout lhs: T, rhs: T) -> Bool {
    if (lhs != rhs) { // Stride
        lhs = lhs.advancedBy(rhs > lhs ? 1 : -1)
        return true
    }
    else {
        return false
    }
}

// Examples

var x = 5
while x --> 0 {
    println(x) // -> 4 -> 3 -> 2 -> 1 -> 0
}

var y = 2
while y --> 7 {
    println(y) // -> 3 -> 4 -> 5 -> 6 -> 7
}