package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(a)(?=.*(b)?)(?=.*(c)?)(?=.*(d)?)`)
var str = `a
a b
a c
a b c
a c b
a b c d
a d b c
a c d b`
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/