CODEWITHSUNDEEP
android-studiokotlin
nibarius
nibarius

Reputation: 4117

Can you declare a property with a custom getter, default setter and no initializer in Kotlin?

I have a property with a getter, default setter and no initializer like this:

    var test: String
        get() = "test value"
        private set

If I try this code in Android studio I get a compile error stating that Property must be initialized. If I instead try it at try.kotlinlang.org the code runs fine and test value is returned whenever I access the property.

I'm trying to read the Kotlin documentation for properties, but I can't really tell if this is supposed to work or not.

Is this valid Kotlin code or not?

Upvotes: 3

Views: 398

Answers (1)

tynn
tynn

Reputation: 39843

The try.kotlinlang.org also accepts an uninitialized val returning null though it is non-nullable:

var test: String
    private set

Your intent is possible if you make the var not field-backed at all:

var test: String
    get() = "test value"
    private set(value) = Unit

For the Backing Fields the documentation states:

A backing field will be generated for a property if it uses the default implementation of at least one of the accessors, or if a custom accessor references it through the field identifier.

Upvotes: 4

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