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package main
import "fmt"
type List[T any] struct {
head, tail *element[T]
}
// A recursive generic type.
type element[T any] struct {
next *element[T]
val T
}
func (lst *List[T]) Push(v T) {
if lst.tail == nil {
lst.head = &element[T]{val: v}
lst.tail = lst.head
} else {
lst.tail.next = &element[T]{val: v}
lst.tail = lst.tail.next
}
}
func (lst *List[T]) GetAll() []T {
var elems []T
for e := lst.head; e != nil; e = e.next {
elems = append(elems, e.val)
}
return elems
}
func main() {
lst := List[int]{}
lst.Push(10)
lst.Push(13)
lst.Push(23)
fmt.Println("list:", lst.GetAll())
}
// Output:
// list: [10 13 23]
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