Is there anyway for me to call the `copy` functio...
# getting-startedj
jeggy
08/26/2022, 1:43 PMIs there anyway for me to call the
copyTdata class Copy code
fun <T: Any> doCopy(dataObject: T): T {
return dataObject.copy()
}a
August Lilleaas
08/26/2022, 1:44 PMthe run-time has type erasure - but if you make the function inline, and reify the type, you get access to it, as you’ll only be able to call doCopy in a way such that Kotlin knows that T is compile time
August Lilleaas
08/26/2022, 1:45 PMI might have answered the wrong question just then - I suppose what you need to know here, is what the type of an arbitrary data class is 🙂
j
jeggy
08/26/2022, 1:48 PMatleast this is still not working
Copy code
inline fun <reified T: Any> doCopy(dataObject: T): T {
return dataObject.copy()
}h
hfhbd
08/26/2022, 1:48 PMIt is impossible. The compiler generates the copy method, there is no
Copyable👍 1
j
jeggy
08/26/2022, 1:50 PMThat's what I expected, but was just hoping for some Kotlin magic here 😛
h
hfhbd
08/26/2022, 1:50 PMIf you want to copy your classes, you could create the Copyable interface:
Copy code
interface Copyable<T> {
fun doCopy(): T
}
data class Foo(val s: String): Copyable<Foo> {
override fun doCopy() = copy()
}🙌 1
r
Ruckus
08/26/2022, 1:53 PMh
hfhbd
08/26/2022, 3:25 PM538 Views