This is not a directly Kotlin related question, bu...

# announcements

[adibfara]

This is not a directly Kotlin related question, but it can be used with Kotlin too, how do you navigate to the implementation of an abstract function, in a specific implementation class?

suppose you have an Animal class that has abstract fun run() and you have class Dog : Anima() { //implements run } and you have an instance of dog and usage of run() somewhere

kotlin
val dog = Dog()
dog.run()

how do you navigate to run implementation in Dog?

[karelpeeters]

If you have the interface opened there's an icon on the left od the function that pops open a list of the implementations of that function.

[Saiedmomen]

right click on method > goto > implementation(s)

[frellan]

Cmd + Click

[Mike]

There are keyboard shortcuts too. Cmd-b/ctrl-b for goto implementation.

[adibfara]

all of the suggestions show all of the implementations, and if you have a lot of implementations of the class, it might be handy to show the implementation for that specific class.

[Mike]

I suspect that w/o running the code, it would be tough for the IDE to determine what the actual type of dog is at that line. I know WE can see it in this example, but…

[adibfara]

It's what type of animal, not type of Dog and I don't think it would be hard for the IDE to go to that file and it's implementation of run() unless it is an abstract class itself

[karelpeeters]

Actually if you do val dog = Dog() it has type Dog so it should all just work, right?

[karelpeeters]

Which declaration do you want to go to?

[adibfara]

Yes it should, but it doesnt. It goes to the abstract function in the base class which is Animal

[adibfara]

unless you find the implementations (which includes Dog) but has all of the implementations and this becomes problematic when you have a lot of implementations (like UseCase for example)

[Mike]

Type of variable dog is what I was saying.

And how many times have you had people say to you “it shouldn’t be that hard to…“.

If you feel this way, raise a feature request on IntelliJ ticket system. They’ll let you know if it’s feasible or not…

[karelpeeters]

I's say that would be a bug, but for me it works fine on this code:

abstract class Parent {
    abstract fun test()
}

class Child: Parent() {
    override fun test() { println("child") }
}

class Other: Parent() {
    override fun test() { println("other") }
}

fun main(args: Array<String>) {
    val child = Child()
    child.test()
}

[adibfara]

Karel when you CMD+click on child.test() does it go to the Child class?

[karelpeeters]

I do Ctrl+B.

[karelpeeters]

Ctrl+Click works too!

[adibfara]

Now it seems that it is a bug! Thanks a lot

[adibfara]

I'll investigate more as I can to find the cause