Hi! I have code like this: ``` fun <T> test(...

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[PHondogo]

Hi!
I have code like this:

fun <T> test(v: T, lambda: (T) -> Unit ) {
  lambda(v)
}

And at call site i have code :

val lambda = {v : Any -> println(v)}
test<SomeObject>(SomeObject(), lambda)

The code below wont compile, cause compiler want to have my val lambda have parameter type exact as declared in function.

How should I modify my fun test declaration to allow <in Parameter> in lambda parameter?

[rcd27]

What is low bound?

[PHondogo]

I mean <in Parameter>

[PHondogo]

for example in java it would be:

interface Test {
        <T> void test(T t, Consumer<? super T> consumer);
    }

[rcd27]

(T) -> R means a function, which accepts T and returns R. By this meaning, T is always in, so basically this is the same as Function interface in Java: it accepts one thing and returns one thing. In the example you provided Consumer accepts T and returns nothing. In Kotlin it would be (T) -> Unit, so as you wrote

[rcd27]

Not sure if I've answered your question.