Null value after deserializing an empty class with tag mapping

[tharel1]

Hello,

First of all, a big thanks for this amazing library which is indispensable in my project.

I try to deserialize the following yaml file :

- !damage
  value: 3
- !hello

I succesfully deserialize the "damage" class but the "hello" class is always null after the deserialization.
Also, when i add a new field to my hello class and to my yaml file, the hello class deserializes successfully...

The damage and the hello class :

class Damage : IAction
{
   public int Value { get; set; }
   public Damage() { }
}
class Hello : IAction
{
   public Hello() { }
}

And my yaml deserializer :

new DeserializerBuilder().WithNamingConvention(UnderscoredNamingConvention.Instance)
            .WithTagMapping("!damage", typeof(Damage))
            .WithTagMapping("!hello", typeof(Hello))
            .Build();

Maybe my yaml is incorrect and I can't have a tag without fields. But I still think I need it for my use case because I feel that it is a "cleaner" solution.

[pensono]

In yaml, and empty value indicates null. You'll need to use a block mapping here to indicate that you want an empty object and not a null one.

- !damage
  value: 3
- !hello {}

[EdwardCooke]

@pensono is correct on the null statement. Did his solution using the braces fix your problem?