Create a linkedlist class that consist of more than one node objects

Linkedlist.swift

public struct Linkedlist<Value> {
    public var head: Node<Value>?
    public var tail: Node<Value>?
    public var isEmpty: Bool {
        return head == nil
    }
    
    init() {}
    public mutating func push(_ value: Value) {
        head = Node(value: value, next: head)
        if tail == nil {
            tail = head
        }
    }
}

extension Linkedlist: CustomStringConvertible {
    public var description: String {
        guard let head = head else {
            return "empty data"
        }
        return "\(head)"
    }
}