Hello, why is Ant still necessary if the project switched to Gradle ?

@mglukhikh Would you mind if I take over https://youtrack.jetbrains.com/issue/KT-21502 ? I think it is an easy one to start off with for a first kontribution.

Hi, Trying to write a test for Map.getOrDefault in j2k. However, the test runner throws

// ERROR: Unresolved reference: getOrDefault

, assumedly because getOrDefault was defined in JDK8. How should I deal with this?

@adam-mcneilly The samples reside along with the standard library. You can take the recent pull requests for this issue as an example: https://youtrack.jetbrains.com/issue/KT-20357

am I missing something ? are dependencies up to date ?

you make a translation and publish it on your own domain. at this time we aren’t hosting any translations on kotlinlang.org itself

👋 hoping this is the right channel to ask this, I figured a lot of the discussions around the Kotlin internals happens here. I was looking at the Kotlin compiler plugins (namely, no-arg and Parcelize, which I figured were some of the simpler ones), trying to get a feel for them. I'd love to contribute to compiler plugin work at some point. I noticed that they're generating bytecode directly: https://github.com/JetBrains/kotlin/blob/master/plugins/noarg/noarg-cli/src/NoArgExpressionCodegenExtension.kt#L54 Is it feasible and/or desirable to generate Kotlin source code (now that KotlinPoet is a thing, though it's still early-stage from what I understand), run it through the embedded Kotlin compiler, and emit the generated bytecode from that instead? It seems more maintainable and less error-prone, at least from my perspective, to generate source code than to try to write out bytecode by hand. Just trying to get some perspective on the way the plugins are written, I assume that one of the main reasons for writing bytecode is just that KotlinPoet is new, and compiler plugins have been a thing for a while now 🙂

Hello, Is it possible to contribute by performing Kotlin and IDE bug fixes, or contribute code? How to carry out these activities? I entered the bug reporting page and did not understand how to perform this activity. Can someone help me ?

For this issue https://youtrack.jetbrains.com/issue/KT-20357, what is the min number of samples for 1 PR? Can I send PR for just one method’s sample?

Hello, I've found small performance problem in standard library, https://youtrack.jetbrains.com/issue/KT-22042, but I don't know whether I should try to contribute fix for it. What's the current policy about stdlib performance? Is it okay to sacrifice a bit of local code readability/reusing for the sake of minor (~10-20%) improvements?

Hello, I want to contribute to this Up for grabs bug https://youtrack.jetbrains.com/issue/KT-21878. How do i go about it?

This sound crazy. In Poland even Christmas gives only 2 free days (if you are lucky enough to have them during working days)

Can anyone review this PR? https://github.com/JetBrains/kotlin/pull/1464

Yeah, that too. I can run compilerTest task. What I need though is to be able to trace the flow as I learn the code and make small changes. Is there any task that will run the kotlinc with an input file I provide? I'm also not familiar with IntelliJ, are there some resources that describe development process for Kotlin?

@Gregory Golda 1. IMO, it is more convenient to use IDEA for debugging rather than launching tests from command line. All tests should have usual "Run ..."-icon in gutter (just do not forget to set "Delegate IDE build/run actions to gradle") 2. Most of our test-runners are generated automatically based on testdata files (you can find them in

compiler/testData

for compiler and in

idea/testData

for IDE). Testdata files are essentially kotlin code, with, possibly, some additional markup (e.g. indicating that some diagnostic should be reported here, etc.) 3. Generated runner-classes usually end with "Generated"-suffix, like

DiagnosticTestGenerated

. They are very simple themselves and usually consist of a bunch of one-line methods, like

doTest(...)

. Most of the test-case logic is implemented in their supertypes, like

AbstractDiagnosticTest

4. If you want to add your own test, you can create your testdata, e.g. in

compiler/testData

and run pre-defined run configuration from IDEA ("Generate Compiler Tests"). It will automatically discover new testdata and update runner (tip: it is easy to find which runner has been updated by looking at the git diff) After that, you can create your own test and start stepping through the compiler code. If you will have any further questions, don't hesitate to ask! Cheers! 🙂

could someone explain how to create new plugin (basing on noarg or allopen) and add it to the source tree using IDEA?

I'm pretty frustrated by now. Can't set up IDEA to be usable. Did it like the README in github repo says, but there are problems I can't resolve. I can run 'clean' or 'dist' and it works, but vvents pop up saying that Kotlin is not configured. Trying to configure it doesn't work, because it's forever finding runtime. Other events regarding Gradle or Maven show up, but no actions are available. But most importantly, it all works so slowly I can't really edit anything. Trying to do anything has 10-30s delay. I have 4xXeon 3.2 GHz, 24 GB RAM, SSD drive. Is there anything I can do to be able to work with IDEA? I've tried to find any solution for 4 days now. Googled, experimented, can't find anything useful.

Hm, it seems

gradlew runIde

on the command line works. So it's some issue with the Gradle import, maybe?

I am having trouble running generateTests with a compile error in :compiler:cli:compileKotlin, is this a known issue? https://pastebin.com/raw/ag9zdzXn

May 2017 commit https://github.com/JetBrains/kotlin/commit/00a5ff23643d2b753ba2140d2baa72f05480cf06 fixes a typo in language grammar, but the typo is still in the docs. Somebody probably forgot to regenerate documentation https://kotlinlang.org/docs/reference/grammar.html

What's an appropriate time to wait before nudging a PR? I submit one to the website two weeks ago, but it hasn't been acknowledged. I thought it might be at least be assigned to someone (even if accepting/denying it came later), but that hasn't happened yet.

Done, thanks.

Trying to determine if an instance

Protobuf.Function

has an

override

modifier but don't see anything in the flags for that. Any ideas or has anybody else attempted this before?. I'm in the context of processing annotations. Let me know if #kapt is better suited for this. thanks!

Question to JB: why is the

kotlin-build-common-test

Maven repo not kept up to date? I would love to be able to get the various

DebugProtoBuf

without having to grab and compile the sources!

and in constructor,

myWritingAllowed = SwingUtilities.isEventDispatchThread()

Hey, I stumbled upon

kotlin.internal.contracts

thing, contents of which is embedded in all standard functions such as

run

,

apply

,

require

, etc. What is it exactly? Where can I read about it?

Ilya G will guide you

org.jetbrains.kotlin.codegen.CompilationException: Back-end (JVM) Internal error: Couldn't inline method call 'slugsToObjectList' into local final fun <anonymous>(it: kotlin.collections.List<kotlin.String>): arrow.core.Option<arrow.core.Either<com.ep.smartid.ums.web.UserController.ObjectLoadError, kotlin.collections.Collection<com.ep.smartid.ums.domain.Application>>> defined in com.ep.smartid.ums.web.UserController.patchUser.<anonymous> { slugsToObjectList(it, { this.applicationService.getApplication(it) }).some() } Cause: slugsToObjectList (Ljava/util/Collection;Lkotlin/jvm/functions/Function1;)Larrow/core/Either;: Cause: Captured field not found: com/ep/smartid/ums/web/UserController$patchUser$2$applications$1$1.this$0

In android-ktx, there are some extension functions which are placed in Uri.kt. One of them is toFile(). val file = uri.toFile() returns the file from uri. It returns File still it is in android.net.Uri package. I was thinking that it should be in separate File.kt. Why it is placed in Uri.kt instead of File.kt separate file? I just wanted to know the intentions of doing it.