package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)\(\?<?[!=](?<r>[^()]|\(\g<r>+\))+\)`)
var str = `A(?<!B(C)D)E(?<=F)G(?!H(I(J))K)L(?=M(O)P)Q(?>R)S(T)`
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/