Is there a performance implication when casting source psi to language specific psi?

Answered

Created November 10, 2022 04:22

I was wondering if this casting is okay to have, in cases where i know i only will be dealing with kotlin source code.

override fun createUastHandler(context: JavaContext): UElementHandler {
  return object : UElementHandler() {
    override fun visitMethod(node: UMethod) {
      val ktFunc = node.sourcePsi?.cast<KtFunction>() ?: return

Can it have any performance implications or any other issues, if i cast sourcepsi to kotlin specific psi?

2 comments

Karol Lewandowski

Created November 10, 2022 05:54

Hi,

If you know you are dealing with the Kotlin code only, then what's the reason for using UAST?

Technically, I don't see any issues with this cast in your code.

Riteshdvps10

Created November 10, 2022 06:35

Yeah, i thought the same, technically it should be fine. I was working on an existing android-lint for jet-pack compose, which extends from Uast, somewhere down the line i casted it back to kotlin psi and i was wondering if it can have any over-head.

I agree with directly working on language specific psi, but wanted to understand if in uast tree, if we do cast back to language specific psi at any point, would it have any perf issues.

Thanks for clarifying.

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