Main.kt

import java.util.concurrent.atomic.AtomicInteger

interface IController {
    fun handle(request: AtomicInteger)
}

fun createController(handler: (request: AtomicInteger) -> Unit): IController {
    return object : IController {
        override fun handle(request: AtomicInteger) = handler(request)
    }
}

private val createControllerF = { handler: (request: AtomicInteger) -> Unit ->
    object : IController {
        override fun handle(request: AtomicInteger) = handler(request)
    }
}

infix fun (((AtomicInteger) -> Unit) -> IController).respondsJSON(
    handler: (AtomicInteger) -> Unit): IController
{
    return createController { request ->
        request.incrementAndGet()
        this(handler)
    }
}

fun example() {
    createControllerF respondsJSON { request -> /**/ }
    createControllerF respondsJSON respondsJSON
    createController respondsJSON
}