code: func (v *Validator) MatchEmail(field string) *ValidationResult {
  	regex := regexp.MustCompile("^[\\w!#$%&'*+/=?^_`{|}~-]+(?:\\.[\\w!#$%&'*+/=?^_`{|}~-]+)*@(?:[\\w](?:[\\w-]*[\\w])?\\.)+[a-zA-Z0-9](?:[\\w-]*[\\w])?$")
  	return v.Match(field, regex)
  }
docs: // MatchEmail will add an error to the Validator if data.Values[field]
  // does not match the formatting expected of an email.