package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)(a)?b(?(1)c|d)`)
var str = `matches bd and abc. It does not match bc, but does match bd in abd. Let's see how this regular expression works on each of these four subject strings.
If-Then-Else Conditionals in Regular Expressions
http://www.regular-expressions.info/conditional.html`
var substitution = "\1"
fmt.Println(re.ReplaceAllString(str, substitution))
}
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/