package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?sm)cat(?:(?!bird|cat).)*dog(?:(?!dog|bird).)*bird`)
var str = `cat abcd
abc <dog abc
</bird>
cat abcd
abc </bird> abc
<dog
catabcd
abc <dog abc
</bird>
cat abcd
</bird>
<dog
<dog
cat
</bird>
match: cat dog bird
match, so we have: cat dog bird, cat dog dog bird, and cat dog cat bird should all
not match first cat: cat cat dog bird
not match second dog: cat dog dog bird
not match lsat bird: cat dog bird bird`
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/