CODEWITHSUNDEEP
swift
n179911
n179911

Reputation: 20341

Initializer is inaccessible due to 'internal ' protection level

I have a struct defined in Swift with public properties

public struct MyStruct {
   
    public let prop1: String
    public let prop2: String
}

In my code, I try to initialize the struct by doing

MyStruct(prop1: "abc", prop2: "def")

But I get complier error saying 'MyStruct initializer is inaccessible due to 'internal protection' level.

The struct and member are in public protection level. So I don't understand what is 'internal' protection level.

Upvotes: 12

Views: 15825

Answers (3)

Naresh
Naresh

Reputation: 955

struct have the default member wise initialiser. Means if you don't provide any init for struct then compiler automatically synthesise that for you. The default synthesised init would be created like

init(member: Type, ...) { 
   /// Initialisation here.
}

So your struct with the automatically synthesised initialiser would look like ---

public struct MyStruct {
   
    public let prop1: String
    public let prop2: String

    /// Auto generated init will be like 
    init(prop1: String, prop2: String) {
        self.prop1 = prop1
        self.prop2 = prop2
    }
}

As you can see the property type is public but the initialiser type is internal so that is causing this issue. You can create initialiser that will fix it.

Upvotes: 1

christophriepe
christophriepe

Reputation: 1703

First there are five different protection levels: private, fileprivate, internal, public and open.

Any property, func or initializer you declare without a protection level keyword will automatically be declared as internal.

Internal means, that your property, method or initializer is accessible everywhere within the same module.

It seems like you are trying to create a new struct out of another module. Best solution would probably be to create your own init instead of the automatically generated one and declare it also as public.

Hope this helps you.

Upvotes: 6

Aviram Netanel
Aviram Netanel

Reputation: 13675

you don't have to define the struct's properties as public,

just the initializer (public init) like this:

public struct MyStruct {

   let prop1: String
   let prop2: String

   public init(prop1: String, prop2: String){
       self.prop1 = prop1
       self.prop2 = prop2
   }

}

Upvotes: -1

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