Solution 1: Go Generics

package main
import (
	"fmt"
)
type node[T any] struct {
	Data T
	next *node[T]
}
type list[T any] struct {
	start *node[T]
}
func (l *list[T]) add(data T) {
	n := node[T]{
		Data: data,
		next: nil,
	}
	if l.start == nil {
		l.start = &n
		return
	}
	if l.start.next == nil {
		l.start.next = &n
		return
	}
	temp := l.start
	l.start = l.start.next
	l.add(data)
	l.start = temp
}
func (l *list[T]) PrintMe() {
	current := l.start
	fmt.Print("List elements: ")
	for current != nil {
		fmt.Printf("%v -> ", current.Data)
		current = current.next
	}
	fmt.Println("nil")
}
func main() {
	var myList list[int]
	fmt.Println(myList)
	myList.add(12)
	myList.add(9)
	myList.add(3)
	myList.add(9)
	// Print all elements
	myList.PrintMe()
}