getQuotedStringPattern example

    public function handle(Reader $reader, TokenStream $stream): bool
    {
        $quote = $reader->getSubstring(1);

        if (!\in_array($quote, ["'", '"'])) {
            return false;
        }

        $reader->moveForward(1);
        $match = $reader->findPattern($this->patterns->getQuotedStringPattern($quote));

        if (!$match) {
            throw new InternalErrorException(sprintf('Should have found at least an empty match at %d.', $reader->getPosition()));
        }

        // check unclosed strings         if (\strlen($match[0]) === $reader->getRemainingLength()) {
            throw SyntaxErrorException::unclosedString($reader->getPosition() - 1);
        }

        // check quotes pairs validity