package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)^interface (\S+)\n?(?:(?: description (.*)| ip address (\S+) (\S+)| .*)\n?)*`)
var str = `interface Null0
no ip unreachables
interface Loopback0
ip address 1.1.1.1 255.255.255.255
no ip redirects
no ip proxy-arp
interface GigabitEthernet0/0/0
description BTCM Hello World
bandwidth 22000
ip address 2.2.2.2 255.255.255.252
no ip redirects
no ip unreachables
no ip proxy-arp
interface GigabitEthernet0/0/1
description Interface going to router X
bandwidth 1000000
ip address 3.3.3.3 255.255.255.252
no ip redirects
no ip unreachables`
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/