package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)^(?<firstchar>(?=[A-Za-z]))((?<alphachars>[A-Za-z])|(?<specialchars>[A-Za-z]['-](?=[A-Za-z]))|(?<spaces> (?=[A-Za-z])))*$`)
var str = `#First Name must contain letters only. It may contain spaces, hyphens, or apostrophes.
First name-and hy-phen's
#It must begin with letters.
First name
1shouldn't match
'shouldn't match
#All other characters and numbers are not valid.
Should match
Should not m@tch
Should not m#tch
#Special characters ‘ and – cannot be together (e.g. John’-s is not allowed)
Allow'd
NotAllow-'d
NotAllow'-d
#An alphabet should be present before and after the special characters ‘ and – (e.g. John ‘s is not allowed)
Allow'd
Also A'llowed
A'llowd
Not Allowd'
Not 'Allowd
#Two consecutive spaces are not allowed (e.g. Annia St is not allowed)
`
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/