What if I want to assign a property to itself?

Question

If I attempt to run the following code:

photographer = photographer

I get the error:

Assigning a property to itself

Answer 1

@vacawama did a great job with all those options. However in iOS 10.3, Apple banned some of these ways and most likely will be doing it in the future again.

Note: To avoid the risk and future errors, I will use a temporary variable.

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We can create a simple function for that:

func callSet(_ object: inout T) {
    let temporaryObject = object
    object = temporaryObject
}

Would be used like: callSet(&foo)

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Or even a unary operator, if there is a fitting one ...

prefix operator +=

prefix func +=(_ object: inout T) {
    let temporaryObject = object
    object = temporaryObject
}

Would be used like: +=foo