package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)\b(x*)\1*(?!\1)(x+) % \1\b = \2\b`)
var str = `xxx % xx = x
xxxxxx % xxxx = xx
xxxxxxx % xx = x
should not match:
xxxxx % xxxxx = xxxxx
xxxxxxxxxxxxxx % xxx = xxxxx
xxxxxxxxxxxx % xx = x
xxxxx % xxx = xxxx`
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/