I have created a data class
data class Something (
val a : String,
val b : Object,
val c : String
)
as later in my program, I need the string representation of this data class I tried to extend the toString
method.
override fun Something.toString() : String = a + b.result() + c
The problem here is, it does not allow extending (overriding) the toString
function, as it is not applicable to top-level functions.
How to properly override/extend the toString method of a custom dataclass?
Adding a .toString()
extension function would not work because:
fun Something.toString() = ...
, then s.toString()
won't be resolved to it, because the corresponding member inherited from Any
wins.But in your case, nothing stops you from overriding toString
inside Something
class body, because data
classes can have bodies just like regular classes:
data class Something(
val a: String,
val b: Any,
val c: String
) {
override fun toString(): String = a + b + c
}