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kotlinlang

Hey folks,

TL;DR:
I want to modify kotlin source in-place but it's proving difficult using kotlin compiler tools.

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I'm trying to create a mutation of a `kt` file/code, such that the rest of the content remains the same, and only specific mutations that I want to add get processed.
I want to update the code in-place, as a form of auto-correction, I would like this to happen using the Psi visitor.

I have tried using compiler embeddable & a PsiFactory to create an expression, and then call `expression.replace()`. in my `visit*()` function.
The code breaks in runtime with:
```Missing extension point: org.jetbrains.kotlin.com.intellij.treeCopyHandler in container {}```
I've seen comments about that error, and the seem to imply that the PSI tree is immutable, so I can't modify it (perhaps because I'm not in the IDE context).

My ideal case would be to run this piece of code, define the mutation I want to apply, and a target kotlin file, and it modifies the file in-place.
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Is there any advise on how to approach this?

I was able to achieve this using ANTLR &amp; the Kotlin grammar.

I guess there was a fundamental flaw in my initial approach. Compilation stage is too late to modify the source being compiled, so the lexing/parsing stage makes more sense, and it works very smoothly with ANTLR