A modern programming language that makes developers happier.

kotlinlang

Hello,

I do not understand how to write function with receiver using lambda expression?
My example that doesn't work.
```val userRoutes: Route.() -> Unit = { route: Route -> route.userRoutes(userService) }```
But this is working:
```val tt = { route: Route -> route.userRoutes(userService) }
val userRoutes: Route.() -> Unit = tt```

For your first example, you can write:
```val userRoutes: Route.() -&gt; Unit = { this.userRoutes(userService) }```
Or just
```val userRoutes: Route.() -&gt; Unit = { userRoutes(userService) }```

The second example works because
> *Non-literal* values of function types with and without a receiver are interchangeable, so the receiver can stand in for the first parameter, and vice versa.
> <https://kotlinlang.org/docs/lambdas.html#instantiating-a-function-type>