Protobuf attributes with a hierarchy of generic classes

Question

I have a class hierarchy that looks like this. These classes contain a lot of other details which I have excluded. This is a simplification to focus on the serialization a

Answer 1

I'm not 100% sure I understand the scenario you want to model; however, [ProtoInclude] only looks one level of inheritance away.

If I understand correctly, try the following; note that you would need to know the potential generic types at compile time at the moment:

using System;
using ProtoBuf;
[ProtoContract]
[ProtoInclude(2, typeof(Response))]
[ProtoInclude(3, typeof(Query))]
class Packet
{
    [ProtoMember(1)]
    int ID;
}
[ProtoContract]
[ProtoInclude(1, typeof(Response))]
[ProtoInclude(2, typeof(Response))]
[ProtoInclude(3, typeof(Response))]
class Response : Packet
{
}
[ProtoContract]
class Response : Response
{
    [ProtoMember(2)]
    public T Value;

    public override string ToString()
    {
        return typeof(T).Name + ": " + Value;
    }
}
static class Program
{
    static void Main()
    {
        Packet packet = new Response { Value = 123 };
        Packet clone = Serializer.DeepClone(packet);
        Console.WriteLine(clone.ToString()); // should be int/123
    }
}