Kotlin Android Studio Emailアドレスのバリデーション

#関数

    fun email_validation(inputEmailAddress:String) :Boolean{
        //emailaddress形式に適合する場合は返り値Trueを返す

        val emailPattern = "[a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\\.+[a-z]+"
        val regex = Regex(pattern = emailPattern)
        val validation_result = regex.matches(input = inputEmailAddress)
        return validation_result

    }