Would it be possible with a K2 compiler plugin to find all t kotlinlang #k2-early-adopters

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

10/23/2023, 2:58 PM

I guess you won't be able to find instantiations when you pass constructor reference to some method

which accepts a function like

(parameters) -> T

, and

method calls the constructor through the passed constructor reference

Johann Pardanaud

10/23/2023, 3:06 PM

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

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?

Copy code

val topVar = SomeClass()

fun main() {
    SomeClass()
}

Is it possible with K2 to find both instanciations?

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

jvmusin

10/23/2023, 3:10 PM

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

10/23/2023, 3:10 PM

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

Johann Pardanaud

10/23/2023, 3:11 PM

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

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