Method Read

csharp/src/Fory/OptionalSerializer.cs:80–111

(ReadContext context, RefMode refMode, bool readTypeInfo)

    }

    public override T? Read(ReadContext context, RefMode refMode, bool readTypeInfo)
    {
        Serializer<T> wrappedSerializer = context.TypeResolver.GetSerializer<T>();
        switch (refMode)
        {
            case RefMode.None:
                return wrappedSerializer.Read(context, RefMode.None, readTypeInfo);
            case RefMode.NullOnly:
                {
                    sbyte refFlag = context.Reader.ReadInt8();
                    if (refFlag == (sbyte)RefFlag.Null)
                    {
                        return null;
                    }

                    return wrappedSerializer.Read(context, RefMode.None, readTypeInfo);
                }
            case RefMode.Tracking:
                {
                    sbyte refFlag = context.Reader.ReadInt8();
                    if (refFlag == (sbyte)RefFlag.Null)
                    {
                        return null;
                    }

                    context.Reader.MoveBack(1);
                    return wrappedSerializer.Read(context, RefMode.Tracking, readTypeInfo);
                }
            default:
                throw new InvalidDataException($"unsupported ref mode {refMode}");
        }
    }
}