IPV6ColonEnd example

return new ValidEmail();
    }

    /** * @param string $addressLiteral * @param int $maxGroups */
    public function checkIPV6Tag($addressLiteral, $maxGroups = 8): void
    {
        $prev = $this->lexer->getPrevious();
        if ($prev->isA(EmailLexer::S_COLON)) {
            $this->warnings[IPV6ColonEnd::CODE] = new IPV6ColonEnd();
        }

        $IPv6       = substr($addressLiteral, 5);
        //Daniel Marschall's new IPv6 testing strategy         $matchesIP  = explode(':', $IPv6);
        $groupCount = count($matchesIP);
        $colons     = strpos($IPv6, '::');

        if (count(preg_grep('/^[0-9A-Fa-f]{0,4}$/', $matchesIP, PREG_GREP_INVERT)) !== 0) {
            $this->warnings[IPV6BadChar::CODE] = new IPV6BadChar();
        }