Is it possible to make an extention-function that ...

# announcements

[Kroppeb]

Is it possible to make an extention-function that is only callable in the context off a certain type with certain type parameters?

Untitled

[octylFractal]

you can do something like gradle does, and instead of generic run define either invoke or an actual function like fun Context<Int>.xyz(block: YourScope.() -> Unit). Then define YourScope with the appropriate extension function.

[Kroppeb]

Not ideal, but I guess that would work for now.

[Stephan Schroeder]

how about passing foo as a parameter to test?
In that case this works:

fun main() {
    val foo: String = ""

    Context<Int>(21).run{
        test(foo) // should compile
    }

    Context<String>("test").run{
        test(foo) // shouldn't compile
    }
}

class Context<T>(value: T) {
}

fun Context<Int>.test(value: String) {
    //
}