Android Development with Kotlin

Reified type parameters

There are some cases where accessing the type parameter at runtime would be useful, but they are not allowed because of type erasure:

    fun <T> typeCheck(s: Any) {        if(s is T){         // Error: cannot check for instance of erased type: T            println("The same types")        } else {            println("Different types")        }    }

To overcome JVM limitation, Kotlin allows us to use a special modifier that can preserve a type argument at runtime. We need to mark the type parameter with the reified modifier:

    interface View    class ProfileView: View    class HomeView: View    inline fun <reified T> typeCheck(s: Any) { // 1        if(s is T){            println("The same types")        } else {        println("Different types")        }    }    // Usage typeCheck<ProfileView>(ProfileView()) // Prints: The ...