kotlinlang #kontributors

Another thing I was wondering is how could we create an automatic javascript wrappers to use in Kotlin. For me the hard thing to include Kotlin in the javascript stack is about the wrappers. So I was wondering, could we create a tool, for example, that could inspect a javascript library a create a wrapper for it automatically, even without types? Or could we have an autocompletion (on IntelliJ, for example) that when we link a library (using ‘external’ or something like that) we achieve an autocompletion (exactly what happens when we are using javascript in IntelliJ)? So I don’t really know the goals or how can I help but I’m very interested on this. Someone can point me the direction?

ilya.gorbunov

04/05/2018, 10:53 AM

📣 We have updated the build environment requirements. Now it's required to have JDK 9 in addition to previous JDK versions to build Kotlin project https://github.com/jetbrains/kotlin#build-environment-requirements

Yuku Kotani

04/12/2018, 3:37 PM

Hi. I'm trying to build Kotlin on Windows and have a problem. When I run

gradlew generateTests

in root directory, the error

CreateProcess error=206, The filename or extension is too long

has occurred. Does anyone know a solution? JDK is at

C:\Program Files\Java\jdk1.8.0_151\bin\java.exe

Kotlin root folder is at

F:\Git\kotlin

nish

04/18/2018, 7:34 PM

When providing arguments to the K2JVMCompiler

K2JVMCompiler().compile(out, arguments)

Is there a way to have it use the bundled Kotlin distribution in my current classpath instead of having to pass external jars using the

-kotlin-home

flag? I want to be able to bundle the Kotlin embeddable compiler with everything that it needs to work in a single binary without requiring any external files

karelpeeters

04/20/2018, 7:55 AM

Check the channel topic.

pp.amorim

04/26/2018, 10:12 AM

Will the Kotlin team remove all Java's typealiases and implement its own? cuz Java 2020...

uli

04/26/2018, 12:10 PM

Tail recursion from inside an inline function seems broken to me ...

var deadline = 10

tailrec fun recursionTest() {
    deadline--
    run {
        println("$deadline")
        return recursionTest()
    }
}

fun main(args: Array<String>) {
    recursionTest()

Above code prints an endless row of `9`s. And the byte code decompiles to this Java code:

public static final void recursionTest() {
      int var0 = deadline;
      deadline += -1;

      while(true) {
         String var2 = "" + deadline;
         System.out.println(var2);
      }
   }

wickedev

04/26/2018, 12:26 PM

then what is limitation of compiler plugin?

alllex

04/27/2018, 2:17 PM

Is there a channel for possible-issue discussion, though?

Egor Trutenko

05/09/2018, 4:17 AM

Is it actually a good practice to use Singleton pattern in Kotlin? If yes, will there be more convenient methods of creating Singletons? Because

private object Holder { val INSTANCE }
companion object { instance: ClassName by lazy { Holder.INSTANCE } }

Is kinda irritating to write and read.

Andrey

05/14/2018, 6:32 AM

Hi! I created my first PR for Kotlin compiler and added necessary test. What's the next step (run on CI/waiting for review/etc)?

dimiii

05/14/2018, 2:11 PM

I see why it is invariant. Sorry, stupid question.

jameswald

05/19/2018, 5:34 PM

Before I dig into https://youtrack.jetbrains.com/issue/KT-17699, I’m curious if anyone has initial thoughts on how this should be addressed (if at all)?

Zac Sweers

05/27/2018, 11:22 PM

no channel history here, so hope I'm not repeating a question from before. I'm trying to get the project loaded into IntelliJ, but indexing seems to have given up on entire packages. Anyone have any advice?

dave

06/05/2018, 3:28 AM

Hello 👋 . I just wanted to check up on https://youtrack.jetbrains.com/issue/KT-7922. I’m currently generating some Kotlin code and have run into a minor issue because I can’t add a

Boolean.Companion.fromJson

like I can with

Int.Companion.fromJson

and

String.Companion.fromJson

(long story). I’m happy to send a PR to implement this very difficult change 😉, but I’m guessing it will need proper consideration first as it is affecting something fundamental like

Boolean

jdemeulenaere

06/10/2018, 5:44 PM

Heys guys! I'd like to start playing with/contributing to the Kotlin compiler. Do you know any good resources/doc about the compiler architecture to get started ? Thanks a lot 🙂

yawkat

06/17/2018, 10:44 AM

I want to fix a compiler bug: https://javap.yawk.at/#iSFdOU/procyon - it looks fairly simple to do, is there anything I need to do before submitting a PR?

Jonathan Walsh

06/21/2018, 4:55 PM

are the contribution guidelines basically the same for https://github.com/Kotlin/kotlinx.serialization as the rest of the kotlin repos?

navi

06/27/2018, 1:08 AM

Hey guys, I recently started coding on Hackerrank using Kotlin and I switched from Java because it saved me from lot of boilerplate code. But there are few instances which is still same as Java and kind of killed my Kotlin experience. - HashMap still doesn’t has update method Hence, i want to work on developing update method for MutableMap<K,V>. Is there anything that I should follow or know before submitting pull request?

karelpeeters

06/29/2018, 12:42 PM

Where is the reference equality

===

in the grammer? http://kotlinlang.org/docs/reference/grammar.html

ctrl + F

doesn't find anything.

ice1000

07/01/2018, 3:27 AM

~/git-repos/kotlin λ> ./gradlew --no-daemon -m
To honour the JVM settings for this build a new JVM will be forked. Please consider using the daemon: <https://docs.gradle.org/4.7/userguide/gradle_daemon.html>.
Daemon will be stopped at the end of the build stopping after processing
> Task :buildSrc:prepare-deps:android-dx:untarDxSources FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Could not resolve all files for configuration ':buildSrc:prepare-deps:android-dx:dxSourcesTar'.
> Could not resolve google:dx:0.
  Required by:
      project :buildSrc:prepare-deps:android-dx
   > Could not resolve google:dx:0.
      > Could not get resource '<https://dl-ssl.google.com/android/repository/dx_0.tar.gz>'.
         > Could not HEAD '<https://dl-ssl.google.com/android/repository/dx_0.tar.gz>'.
            > Connect to <http://dl-ssl.google.com:443|dl-ssl.google.com:443> [<http://dl-ssl.google.com/74.125.204.93|dl-ssl.google.com/74.125.204.93>, <http://dl-ssl.google.com/74.125.204.91|dl-ssl.google.com/74.125.204.91>, <http://dl-ssl.google.com/74.125.204.136|dl-ssl.google.com/74.125.204.136>, <http://dl-ssl.google.com/74.125.204.190|dl-ssl.google.com/74.125.204.190>, <http://dl-ssl.google.com/2404:6800:4008:c07:0:0:0:be]|dl-ssl.google.com/2404:6800:4008:c07:0:0:0:be]> failed: 网络不可达 (connect failed)

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

ice1000

07/01/2018, 3:31 AM

I think it's impossible to download something when the url is 404

jdemeulenaere

07/01/2018, 9:51 PM

Hey guys! I am playing a little bit with the kotlin compiler, and I was wondering how we can access the compiler logs when compiling a project in a freshly build IDEA instance ? I am launching AS Studio using ./gradlew runIde and I'd like to access the logs of the compiler when building my Android project. Also, are there any useful docs about those kind of things to get started on working on kotlinc ?

cart

07/03/2018, 10:00 PM

gradle build

runs a ton of things, I really just want to build the Kotlin standard library and the compiler. Is this possible?

raulraja

07/04/2018, 3:01 PM

@simon.vergauwen and I have started a POC for KEEP-87 https://github.com/Kotlin/KEEP/pull/87 and I’m trying to find my way around the compiler code base. Are there any docs as to how things are architected, organized etc? I have been digging through source files for a couple of days now not making much progress. Any recommendation as to where to look for: - New modifier

extension

in grammar. (grammar/src/modifiers.grm) What are other relevant places that need to change for the grammar to be valid Kotlin syntax? - Function/Class/Interface args scope resolution. Interested as to where it is decided which extension functions apply and what the

this

and parent scopes refer to. - Call scope resolution tests: What is an effective way to test my changes to resolution are correct or similar tests I can use as base for the type class definition and resolution tests? In general I’m also interested if anyone has stories to tell as to how they go about adding a similar feature to the compiler, what is the flow usually looks like when working in this project. Ultimately if anyone wants to help please contact me, thanks!

jdemeulenaere

07/04/2018, 6:55 PM

Hey guys! Quick question about working on the JetBrains/kotlin repo. I ran a child Android Studio with "bunch switch . as32 && ./gradlew runIde", but I feel that my android project is not using the kotlin compiler that I just compiled.. How can I check if it is using it or not ? Thanks a lot 🙂

cart

07/05/2018, 10:46 PM

Also curious why when I run

./gradlew -q compiler:dependencies

I get

implementation - Implementation only dependencies for source set 'main'. (n)
No dependencies

and lots of stuff under

testCompile

shouldn't there be dependencies for building the project not just testing?

cart

07/09/2018, 6:14 PM

Can anyone explain what this message means?

WARNING! Removed exclusions from kotlin-stdlib dependency of kotlin-android-extensions-runtime artifact's maven metadata, check kotlin-stdlib dependency of :kotlin-android-extensions-runtime project

redrield

07/20/2018, 3:06 PM

Is there a way I can debug kotlinc in intellij?

redrield

07/21/2018, 10:48 PM

How can i bootstrap compilation of the stdlib to use kotlinc out of dist/ to get this to work?

Title

redrield

07/21/2018, 10:48 PM

How can i bootstrap compilation of the stdlib to use kotlinc out of dist/ to get this to work?

dsavvinov

07/22/2018, 10:34 AM

1. First, you need to assemble snapshot compiler and publish it in local maven repository:

./gradlew dist install publish

2. Then, you can just call

./gradlew dist -Pbootstrap.local

redrield

07/22/2018, 4:58 PM

Ah, thank you!

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