package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?(DEFINE)
(?<bit>[0-1][0-9]{1,2}|2[0-4][0-9]|25[0-5])
)
(
10\.
((?&bit)\.){2}((?&bit))
)|
(
172\.
(
(1[6-9])|
(2[0-9])|
(3[0-6])
)
\.
((?&bit)\.?+){2}
)|
(
192\.168\.
((?&bit)\.?+){2}
)`)
var str = `172.31.253.126`
if len(re.FindStringIndex(str)) > 0 {
fmt.Println(re.FindString(str),"found at index",re.FindStringIndex(str)[0])
}
}
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/