Swift Tuple index using a variable as the index?

Question

Swift Tuple index using a variable as the index? Anyone know if it is possible to use a variable as the index for a Swift tuple index. I wish to select and item from a tuple usi

Answer 1

You can cast a tuple to a buffer only if it has an homogeneous type. But before doing so, wonder if an array can't do the job.

var tuple: (Int, Int, Int, Int) = (0,1,2,3)

withUnsafeMutablePointer(to: &tuple) { pointer in
    pointer.withMemoryRebound(to: Int.self, capacity: 4) { buffer in
        buffer[3] = 0
    }
}

print(tuple)

result:

(0, 1, 2, 0)