so, will the JSON ast parser stuff enable us to use polymorphic json objects with

@type

entry? https://github.com/Kotlin/kotlinx.serialization/pull/132

In theory yes, but it’s not automated. You’ll need to manually write deserializer for that, which will first deserializer to json-ast, look into

@type

and then use corresponding to type deserializer

How do we deserialize a given object or field to a general JSON AST from a manually written deserializer? I was never able to figure out which read method could do that.

There’s a sample in PR’s tests: https://github.com/Kotlin/kotlinx.serialization/blob/7d6206a6781a60565edcc1c9e26af93afd5aed12/runtime/jvm/src/test/kotlin/kotlinx/serialization/formats/json/JsonTreeAndMapperTest.kt#L11

💥 just what I needed, thanks!