package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)^type=dog[\s\S]*?^name=(\w+)(?:(?:(?!^type=)[\s\S])*?^color=(\w+))?`)
var str = `type=dog
sex=male
name=wolf
color=brown
type=dog
sex=male
name=bob
type=cat
sex=male
name=tom
color=black
type=dog
sex=female
name=simona
color=white`
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/