package main

import "fmt"

func rangeOver(values []any, do func(i int, data any)) {
        for i, v := range values {
                do(i, v)
        }
}

func rangeOverG[S ~[]T, T any](values S, do func(i int, data T)) {
        for i, v := range values {
                do(i, v)
        }
}

func main() {
        data := []string{"one", "two"}
        ranger := func(i int, item string) {
                fmt.Println(i, item)
        }
        rangeOver(data, ranger)
        rangeOverG(data, ranger)
}