Function fieldMatchesRegexByStringerValOrString

util.go:323–335

Checks if field value matches regex. If fl.Field can be cast to Stringer, it uses the Stringer interfaces String() return value. Otherwise, it uses fl.Field's String() value.

(regexFn func() *regexp.Regexp, fl FieldLevel)

// Checks if field value matches regex. If fl.Field can be cast to Stringer, it uses the Stringer interfaces
// String() return value. Otherwise, it uses fl.Field's String() value.
func fieldMatchesRegexByStringerValOrString(regexFn func() *regexp.Regexp, fl FieldLevel) bool {
	regex := regexFn()
	switch fl.Field().Kind() {
	case reflect.String:
		return regex.MatchString(fl.Field().String())
	default:
		if stringer, ok := getValue(fl.Field()).(fmt.Stringer); ok {
			return regex.MatchString(stringer.String())
		} else {
			return regex.MatchString(fl.Field().String())
		}
	}
}