Providing a default value for an Optional in Swift?

Question

The idiom for dealing with optionals in Swift seems excessively verbose, if all you want to do is provide a default value in the case where it\'s nil:

if let         


        

Answer 1

if you wrote:

let result = optionalValue ?? 50

and optionalValue != nil then result will be optional too and you will need unwrap it in future

But you can write operator

infix operator ??? { associativity left precedence 140 }

func ???(optLeft:T?, right:T!) -> T!
{
    if let left = optLeft
    {
        return left
    }
    else { return right}
}

Now you can:

 let result = optionalValue ??? 50

And when optionalValue != nil then result will be unwraped