package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)^Exactfoobar(?:\.[a-z0-9][a-z0-9_-]*){2}(?:\.[a-zA-Z0-9][a-zA-Z0-9_-]*)+$`)
var str = `Exactfoobar.somestring.some_other-string.someStringwithCaps
There could be 4 or more fields separated by a dot
The first word should be exactly Exactfoobar.
The 2nd and 3rd word can't have caps but can have -_
The 4th word and so on can have caps with -_`
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/