Swift struct compiler error when declaring a private var

user_1077601 0
Viewed 174

I have a very simple struct which works as expected:

struct Obligation {
    
    var date = Date()
}

let snapshotEntry = Obligation(date: Date())

however if I add a private var to this struct, I get a compile error on the line I create an instance of my struct saying Argument passed to call that takes no arguments:

struct Obligation {
    
    var date = Date()
    
    private var blank:Bool = false
}

let snapshotEntry = Obligation(date: Date())

enter image description here

If I remove the private from the new blank var it compiles fine. Am I overlooking something simple here? Can a struct not have a private var?

xcode12 swift struct
3 Answers

You can't use default member wise initialiser for assigning struct's property with private access level modifier.If you need to assign your private property using initializer, you have to write your own OR give private member initiate value resolves it

user_17806320

As the Access Control documentation clearly states:

The default memberwise initializer for a structure type is considered private if any of the structure’s stored properties are private. Likewise, if any of the structure’s stored properties are file private, the initializer is file private. Otherwise, the initializer has an access level of internal.

Just use a custom initializer.

user_67916770

This should work:

struct Obligation {
    var date: Date
    private var blank: Bool
    
    init(date: Date = Date(), blank: Bool = false) {
       self.date = date
       self.blank = black
    }
}
    
let snapshotEntry = Obligation(date: Date())
user_90147200
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