Swift: (fake) n-ary operator

infix operator < { associativity left }

// left-most comparison
func <<T : Comparable>(lhs: T, rhs: T) -> ((T, T) -> Bool, () -> T) -> Bool {
    return { (op: (T, T) -> Bool, value: () -> T) in
        (lhs < rhs) && op(rhs, value())
    }
}

// mid comparisons
func <<T : Comparable>(lhs: ((T, T) -> Bool, () -> T) -> Bool, rhs: @autoclosure () -> T) -> ((T, T) -> Bool, () -> T) -> Bool {
    return { (op: (T, T) -> Bool, value: () -> T) in
        lhs({$0 < $1}, rhs) && op(rhs(), value())
    }
}

// right-most comparison
func <<T : Comparable>(lhs: ((T, T) -> Bool, () -> T) -> Bool, rhs: @autoclosure () -> T) -> Bool {
    return lhs({$0 < $1}, rhs)
}


// Example:
var x = 3
var y = 5
var z = 7

if 1 < x < y < z < 10 {
    true
}
else {
    false
}