Which protocol I should conform to add one generic value to another in Swift?

Question

I've created a struct called 'Code', which contains a string and generic property. So, now I'm trying to create a method, which is going to work with the array of Code elements. But the problem is that I'm not aware about the protocol that T-elements should conform to perform + operator.

struct Code<Element>{
   let probability: Element
   let code: String
}

func createTree<T>(_ array: [Code<T>]){

    for i in 0..<array.count-1{
       let sum = array[i].probability + array[i+1].probability
    }

}

Thanks for your help!

Can you provide the code for your struct? – Benjamin Lowry Feb 16 '17 at 08:22 — Benjamin Lowry, Feb 16 '17 at 08:22
@BenjaminLowry surely, I've added one – Kirill Korolev Feb 16 '17 at 08:28 — Kirill Korolev, Feb 16 '17 at 08:28

score 0 · Answer 1 · answered Feb 16 '17 at 08:35

0

Arithmetic is the protocol you are after. See https://developer.apple.com/reference/swift/arithmetic

answered Feb 16 '17 at 08:35

Gary Makin

3,109
1
19
27

But note that's only available since Swift 3.1. – Hamish Feb 16 '17 at 08:38

Which protocol I should conform to add one generic value to another in Swift?

1 Answers1