package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)(mother|father)(.*?)(?!\1)((?1))`)
var str = `Postive matches:
mother a father
father a mother
father a mother a father
mother a father a mother
something else mother a father a father mother blablö mother and father
not this mother mother or
or father father but this
Non-matches:
just mother
just father
mother then mother
father then father
`
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/