Make YamlNode serializable

[EdwarDDay]

Describe the problem you'd like to solve

I would like to deserialize structures, that are partly arbitrary. For example when I want to deserialize the [mustache specification], most of the structure can be properly deserialized with somethling like

@Serializable
data class Specification(
  val overview: String,
  val tests: List<Test>,
)

@Serializable
data class Test(
  val name: String,
  val desc: String,
  val template: String,
  val expected: String,
  val partials: Map<String, String> = emptyMap(),
  val data: YamlNode? = null, // not serializable
)

but the data can't be, because it can be arbitrary nested or even just a primitive value.

Describe the solution you'd like

I would like to have YamlNode as Serializable (similar as done by the kotlinx team for the JsonElement).

Describe alternatives you've considered

I could write it on my own in my project, but I think, this would be really valuable to the library. Another alternative is to read the whole structure as YamlNode and then parse everything on with the node, but that reduces the usability.

Additional context

No response

[charleskorn]

This seems reasonable to me, PRs are welcome 🙂