At about Go 1.26, add a SliceElemPointers function

[zigo101]

see: golang/go#69345

[zigo101]

//go:build go1.23

package main

import "fmt"

func SliceElemPointers[E any](s []E) func(func(*E) bool) {
	return func(yield func(*E) bool) {
		for i := range s {
			if !yield(&s[i]) {
				break
			}
		}
	}
}

func main() {
	var x = []int{1, 3, 6}
	for p := range SliceElemPointers(x) {
		*p *= 2
	}
	fmt.Println(x) // [2 6 12]
}