package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)^(?=[a-z][a-z0-9@._-]{5,40}$)[a-z0-9._-]{1,20}@(?:(?=[a-z0-9-]{1,15}\.)[a-z0-9]+(?:-[a-z0-9]+)*\.){1,2}[a-z]{2,6}$`)
var str = ``
for i, match := range re.FindAllString(str, -1) {
fmt.Println(match, "found at index", i)
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/