In a compiler plugin, I want to generate new source files by interpreting already-existing source files (basically exactly like an annotation processor would) but while getting access to the resolved descriptors coming in from external sources (e.g. if there's a KtCallExpression to

let

from the stdlib, I want to get the descriptor for that call). I do realise that I can get the

bindingContext

and use that to call

ktExpression.getResolvedCall

but obviously I don't have access to that inside of a

CollectAdditionalSourcesExtension

so what can I do here? I'm thinking maybe I can run analysis twice or something as in run it once inside of a

CollectAdditionalSourcresExtension

and generate the files and then let the compiler do its own analysis normally but is that the right approach?

Hey all 👋 I’m coming here as I have a question for the

KotlinType.getJetTypeFqName

function (here). We use this function quite a lot inside detekt when resolving types. This function is inside the JS package of the compiler:

org.jetbrains.kotlin.js.descriptorUtils

but it’s implementation is platform agnostic. Why is this the case? Could this be moved inside

org.jetbrains.kotlin.descriptors

?

How can one parse the kotlin metadata from a

.class

file?

kotlinx-metadata-jvm

seems to give no information whatsoever about how to do this and assumes that either you're going to get it "reflectively" or "through other means". Is there an easy way to get the metadata out quickly, or would I have to go into ASM?

Hopefully this is the right place to ask this 🙂 We are using the strict API for our internal modules (not published anywhere) to avoiding leaving details across modules. However, one (understandable) side effect is that any component defined as public is never marked as unused by the IDE even if there is no uses. Is there any way to make sure that we are not leaving unused code in our project? Given that we are probably not using it correctly as is 😅

It seems to me that there are three Kotlin language constructs that are of interest to a Koltin code coverage tool: 1. property initialization (top level, class and inside a function, including arguments). 2. statement and expression execution inside functions (top level, methods of a class and local functions). 3. class constructor argument initialization. (Could these be considered properties?) Surely it cannot be that simple, or can it? Granted, the second item breaks down into a number of items of interest, especially 

if

 and 

when

.

Are there are defined limits on IdSignature changes wrt changes in the method? I'm assuming it's tied to the ABI (i.e. if the ABI doesn't change neither will the function's signature) but wanted to check before I started depending on it.

Is there a map of original names to mangled names produced during compilation that could be used for other bytecode tools that are not part of the kotlin compilation chain? If not, does a compiler plugin get access to the original names if its run after another plugin?

If I need to generate files as part of a compiler plugin (i.e. in an AnalysisHandler) where should I place those generated sources? currently I'm just using the first source file I find and creating a new directory in its directory, but obviously that's extremely error-prone. I basically just want to somehow get a hold of the

build/generated/source

directory I guess but in a way that also works if

kotlinc

was called from the command-line with my plugin. I'm seriously hoping that there is a way to do this. It seems as though what

kapt

does for example is to just have a hard-coded value based on the gradle project.buildDir, but I'm trying to make this work in the case that gradle is for some reason not there.

Does anyone know what artifact has

org.jetbrains.kotlin.name.FqName

in it? I am getting it from

kotlin-compiler-embeddable

in version

1.4.30

but not in

1.4.31

This is to use the

IrPluginContext

builder methods.

Hi, does anyone know how to reference a Java static method in IR? I tried

IrPluginContext#referenceFunctions(FqName)

but the list keeps coming back empty

Hi, I'm trying to add a new operator to the kotlin compiler source code for academic purposes, a '**' that should be translated to '.pow' (so "2.0 ** 5.0" should be the same as "2.0.pow(5.0)"). By replicating the '*' (times) operator I'm able to add it to the lexer, and it is correctly identified and replaced, even in the kotlin bytecode viewer. Unfortunately when compiling it says "Error:(9, 17) Kotlin: 'operator' modifier is required on 'pow' in 'kotlin.math'". The issue is: the pow operation doesn't have the keyword operator, but I can't add it because otherwise I'm not able to compile it. The same also happens if I try to add a new function (let's say "public operator fun powOper(other: Int): Int" because there is no powOper in the Kotlin version I'm using to compile the source code, so I can't add the operator keyword there. What can I do?

is IR fed to each plugin consecutively or is there a merge strategy involved? im wondering how the android jetpack compose plugin is successfully wrapping my IR modifications. it seems to imply my plugin went first

I'm wanting to make a change to kotlin.flex, but when I rebuild the project I don't see any generated sources from the .flex file. There are no errors, eithers, because evidently Flex is not being use. How to I trigger this code generation in my IDEA build?

Hey, Im trying to find the closest equivalent to

com.sun.tools.javac.code.Symbol

from the javac compiler API. In another project Im working on, we're able to keep a mapping of Symbol to a String and be able to lookup a symbol, be it from a return type declaration, variable type etc and retrieve its String association. What would be the best option in the kotlin compiler API? Im walking the trees of KtFiles via

KtTreeVisitorVoid

invoked in

analysisCompleted

from an

AnalysisHandlerExtension

subclass 🙂

context: I'm trying replicate the behavior of https://github.com/JetBrains/intellij-community/blob/master/jvm/jvm-analysis-impl/[…]ion/blockingCallsDetection/ThrowsTypeBlockingMethodChecker.java 2 problems I'm facing: 1. @kotlin.jvm.Throws is a annotation with retention SOURCE, so how's intelliJ doing it? 2. the

public T method() throws IllegalArgumentExpression

; the throws part of it is a "reference list" which seems to be in rt.jar of the JDK; how is that resolved?

How do I adjust IDEA settings to select my modified kotlin compiler under the artifacts directory as the one I want to use going forward?

Hello, I want to compile Kotlin code to C++ code (not to machine code directly, also don't need a full-blown GC), so I can enjoy programming microcontrollers (like AVR/ATMega on Arduinos) without writing awful code. What paths do you suggest to approach such a project? Interested in seeing different approaches. Parsing Kotlin code myself (using Kotlin code of course) is an option, though I'm wondering if there's any better ways, including using backend IR 🤔.

In Kotlin 1.5-RC I am unable to cast 

Class<*>

 to 

Class<Enum<*>>

  and use if in Java function requiring 

public static <T extends Enum<T>> EnumJsonAdapter<T> create(Class<T> enumType) {

Should I do it somehow differently, or is it a bug?

I try to migrate kotlin-android project from 1.3.72 to 1.4.32

plugins {
    id("com.android.application")
    id("kotlin-android")
    id("kotlin-android-extensions")
    id("com.google.firebase.crashlytics")
    kotlin("kapt")
}

When I build it

./gradlew --info assembleDebug

I have an error (was attached in thread). How can I fix it? I haven’t found the bug in youtrack

Hi, can someone point out the problem with this function?

fun KtClassOrObject.findSuperType(
    bindingContext: BindingContext,
    fqName: FqName
): KtSuperTypeListEntry? {
    return this.superTypeListEntries.firstOrNull { entry ->
        bindingContext.get(
            BindingContext.TYPE,
            entry.typeReference
        )?.constructor?.declarationDescriptor?.fqNameSafe == fqName
    }
}

It's called inside an AnalysisHandler's

analysisCompleted

. The problem is that

bindingContext#get

always returns null, despite

entry.typeReference

not being null, but why?

Does someone have an idea why Im getting the shown error when passing plugin options via gradle

freeCompilerArgs

but when manually calling

kotlinc

with the args, it works fine and the value is properly set?

Does anyone have experience of debugging why incremental compilation decided to rebuild a particular file? I don't have a problem, it's working, but it's recompiling and writing new classes that don't seem to have actually changed and I'm curious why.

Does anyone know how i can reference a

IrFunctionAccessExpression

value parameter for use in another expression? I keep being told I am creating the const or getter twice when i am modifying a function body

I’m able to crash K/N linkReleaseFrameworkIosX64 and linkDebugTestMingwX64. I’ve tried adding -Xverbose-phases=ALL to determine where it crashes, but then that caused it to run out of memory. Any other useful flags I should try?

Sorry to bother you, recently I was studying the kotlin compiler, I cloned the code and ran

./gradlew runIde

to check my changes, but I don’t know how to debug the breakpoint directly, could anyone please help me solve it

Hey 👋 , what are the tests I should run if I want to verify that I didn't break anything with a fix for the irToJs part of the compiler?

I'm currently looking at KT-39891 . As mentioned in the ticket the problem could be solved by adding

toString()

calls for the different

expression.arguments

(here). The "pre IR" translator had a similar mechanism. However I'm unsure why the pre IR code also added

toString

for the other types (Any, Comparable, Number)? At least if I look at the kotlin.js , I can only see

Long

and

BoxedChar

implementing

valueOf

.

Is it possible to create “sugar” for serialization plugin? My visitor must be called before serialization visitor in that case. Is it possible?

Hi everyone! I found this repository on Kotlin https://github.com/Kotlin/grammar-tools and I have tried to use it; but the properties of the tree and subtrees are private and last build of the tool was produced by April 2019. How does one go about getting it updated? I have also tried to build it myself but there's a dependency missing so I can't build it. There are issues created in the repo but seems there isnt so much activity