LRUCache does not compile with newer Swift

[rainbowcardiod]

The compiler is complaining about type mismatches, priority.first is returning the element of the node, while key2node is expecting the node:
Cannot assign value of type 'KeyType?' to subscript of type 'LinkedList<KeyType>.LinkedListNode<KeyType>?'
at line [1]

My solution is to change key2node[key] = first of insert() [1]
with key2node[key] = priority.node(at: 0).

[yuvashrikarunakaran]

// Before change (which caused the error)
key2node[key] = priority.first

// After the change
key2node[key] = priority.node(at: 0)

swift
class LinkedList {
class LinkedListNode {
var value: KeyType
var next: LinkedListNode?

    init(value: KeyType) {
        self.value = value
    }
}

var head: LinkedListNode<KeyType>?

// Example method to get a node at a given index
func node(at index: Int) -> LinkedListNode<KeyType>? {
    var current = head
    var currentIndex = 0

    while current != nil {
        if currentIndex == index {
            return current
        }
        current = current?.next
        currentIndex += 1
    }

    return nil // Return nil if index is out of bounds
}

// Other methods for LinkedList...

}