Type parameter cannot have any other bounds if it's bounded by another type parameter: what does this mean and how to resolve it?

Question

I was implementing custom list class MyList<T> in kotlin. In that, I wanted to add insertSorted function, which inserts a new element into the list in sorted order. For that, T must implement comparator. So the prototype of that function will be fun <C> insertSorted(ele: C) where C:T, C:Comparable<T> But this is giving me Type parameter cannot have any other bounds if it's bounded by another type parameter error. I am not understanding what this error is. Also, this question did not help me much.

PS: The type I am passing to that function is declared as class MyClass : Comparator<MyClass>. So the bound where C:T, C:Comparator<T> is valid I guess.

Answer 1

For the meaning of the error, see this question:

Why can't type parameter in Kotlin have any other bounds if it's bounded by another type parameter?

But if your custom list contains elements of type T and you want to compare them, then T should implement Comparable<T>.

So this should be all you need:

class MyList<T: Comparable<T>> {
    fun insertSorted(ele: T) {
    }
}