Would it be possible, with a K2 compiler plugin, t...

# k2-adopters

[Johann Pardanaud]

Would it be possible, with a K2 compiler plugin, to find all the instanciations of a specific class when compiling? Currently I'm using KSP and annotations, but it's quiet error-prone since you can sometimes forget to add the annotations.

An important thing: I would like to find all the instanciations, even those inside expressions.

[jvmusin]

I guess you won't be able to find instantiations when you pass constructor reference to some method f which accepts a function like (parameters) -> T, and f method calls the constructor through the passed constructor reference

[Johann Pardanaud]

oh right, however I guess I can live with this limitation ^^

[Johann Pardanaud]

Let's take an example. Say I want to find all the instanciations of SomeClass, is it possible to find them in the following code?

val topVar = SomeClass()

fun main() {
    SomeClass()
}

Is it possible with K2 to find both instanciations?

[Johann Pardanaud]

I suppose it could be done with some kind of visitor?

[jvmusin]

I do it using a visitor in K1 on IR level with IrElementTransformerVoidWithContext*.*visitConstructorCall. See here: https://github.com/jvmusin/naked/blob/main/naked-kotlin-plugin/src/main/kotlin/io/github/jvmusin/naked/NakedIrGenerationExtension.kt#L142C50-L142C50

[dmitriy.novozhilov]

It's possible with IR plugin (this part of compiler API is common for K1 and K2)

[Johann Pardanaud]

Amazing, thanks! And I suppose we can do the same with function calls?