I want to port the custom serializer at

Question

I want to port the custom serializer at <https github com Vampire setup wsl blob master buildSrc src main kotlin net kautler dao GitHubAction kt L73> that still runs on 0 20 0 to 1 3 x I there have used `override val descriptor = SerialDescriptor CONTEXTUAL ` for the `KSerializer` How would I port that to 1 3 x as the function does not expect a kind anymore

Sebastian Schuberth · Answer

Would using the experimental ` Serializer`annotation maybe work

Sebastian Schuberth · Answer

Ah sorry just saw you re actually already using it at <https github com Vampire setup wsl blob bcd134a8857d9afc02db9cc3fa981a30e231ab61 buildSrc src main kotlin net kautler dao GitHubAction kt L67> I thought specifying the `descriptor` is then not required anymore

Vampire · Answer

Hm not at my box right now but I think if I remove the descriptor it complains that it is missing and if I make the class abstract it cannot instantiate it

Sebastian Schuberth · Answer

At least for primitive types this works for me see e g <https github com oss review toolkit ort blob 470e2f323b516389bd96a63a81c67b74891a36f8 clients scanoss src main kotlin model BooleanSerializer kt L30 L34|https github com oss review toolkit ort blob 470e2f323b516389bd96a63a81c67b74891 36f8 clients scanoss src main kotlin model BooleanSerializer kt>

Sebastian Schuberth · Answer

Also see <https github com Kotlin kotlinx serialization blob master docs serializers md deriving external serializer for another kotlin class experimental>

Vampire · Answer

Your example does not match because it is not about a generic type For a generic type like in my case you do not need an `object` but a class with constructor and also a provided descriptor And additionally the serializer is contextual I needed quite some time and comments to get it working properly back then with 0 20 0

Vampire · Answer

Hm I found that it works if I use ``` InternalSerializationApi override val descriptor = buildSerialDescriptor CONTEXTUAL ``` but I don t like the internal serialization api being used It s documentation says that it should not be used and if necessary issues filed So is there another way to get a serial descriptor with `CONTEXTUAL` kind

Emil Kantis · Answer

Wouldn t a Map serial descriptor be appropriate in this case ``` mapSerialDescriptor lt String Output gt ```

Vampire · Answer

No it must be a contextual descriptor or the processes is not done contextually