Given a DSL that is defined by an external project...

# announcements

[jmfayard]

Given a DSL that is defined by an external project (Gradle in my case),
is it possible to define an extension function
fun String.someExtensionFunction() = "Hello World"

that would be usable only from the right extension block?

dependencies { // this is Dependencies
    ....
}

That seems impossible because it would require to define the function having two receivers, Dependencies and String

[Dico]

You can wrap the dependencies with your own class, using interface delegation. Then add your function to the class.

[Dico]

class MyReceiver(deps: Dependencies) : Dependencies by deps) {
fun String.function()...
}

Then create your own dependencies {} function with a slightly different name

[jmfayard]

That's a clever trick

[karelpeeters]

There's a lot of discussion here: https://discuss.kotlinlang.org/t/compound-extension/10722, and a youtrack issue here: https://youtrack.jetbrains.com/issue/KT-10468