Goでジェネリック型のデフォルト値を返す方法は?

type mylist[T any] struct {
    first *node[T]
}

type node[T any] struct {
    data T
    next *node[T]
}

func (list *mylist[T]) pop() T {
    if list.first != nil {
        data := list.first.data
        list.first = list.first.next
        return data
    }
    return nil
}

func (list *mylist[T]) getfirst() T {
    if list.first != nil {
        return list.first.data
    }
    return nil
}

cannot use nil as T value in return statement

func getZero[T any]() T {
    var result T
    return result
}

package main

import "fmt"

func main() {
    i := getZero[int]()
    fmt.Printf("%T %v\n", i, i)

    s := getZero[string]()
    fmt.Printf("%T %q\n", s, s)

    p := getZero[image.Point]()
    fmt.Printf("%T %v\n", p, p)

    f := getZero[*float64]()
    fmt.Printf("%T %v\n", f, f)
}

int 0
string ""
image.Point {0, 0}
*float64 <nil>