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kotlinlang

It's probably the easiest option available yeah. It also supports reflection-based stuff if you want that instead.

Can it do lenses into sealed classes where a `val` is a constructor argument to all subclasses?

aka
```sealed interface Foo {
  val x: String
  data class Bar(override val x: String)
  data class Baz(override val x: String)
}```

We'll gladly deal you some optics, but we prefer to just DSL :wink: I hope to turn it into a compiler plugin down the line, and make the optics disappear all-together.

I've got
```@Serializable
@optics
sealed class CardMessage {
    abstract val identifier: String?
    ...
    @Serializable
    @SerialName("YoutubeVideo")
    @optics
    data class YoutubeVideo(
        val videoId: String,
        override val identifier: String? = null,
    ): CardMessage() {
        companion object
    }
}```
But somehow `CardMessage.identifier` isn't being generated, all the other fields get their `Prism`s.

Does CardMessage have a companion object?

But yeah, I've got a `companion object`. Otherwise it doesn't even compile.

Which version are you on? Was this not backported? :thinking_face:

Sorry, it seems that was not backported and only available from 2.0

You can work on 2.0.0-alpha.2 just fine though.

Switched over, synced, ran `kspKotlin`, still no `CardMessage.identifier`.

Can you see the generated code in `/build`?

Should be somewhere under the generated folder

<https://kotlinlang.org/docs/ksp-quickstart.html#make-ide-aware-of-generated-code>

If the code is there, then your ide might not be able to find it. Here is the official docs :point_up:

It's in there, but the compiler doesn't find it even?

Ye, you need to explicitly add it to your sourceSets in Gradle. Not sure why KSP cannot do that automatically.

Hopefully we get compiler plugins soon to solve this :crossed_fingers:

Hmm, no, it's actually added. The `identifier` isn't being created at all. I can auto-complete the other created `Prism`s

It creates a `Lens` for each individual part of the sealed object, but not the whole

:exploding_head: For me it was working fine on the snippet you send above using `2.0.0-alpha.2`

Could you try again with the full data definition? Sent via query