Gregwar\RST\Span::__construct PHP Метод

    public function __construct(Parser $parser, $span)
    {
        if (is_array($span)) {
            $span = implode("\n", $span);
        }
        $tokenId = 0;
        $prefix = mt_rand() . '|' . time();
        $generator = function () use($prefix, &$tokenId) {
            $tokenId++;
            return sha1($prefix . '|' . $tokenId);
        };
        // Replacing literal with tokens
        $tokens = array();
        $span = preg_replace_callback('/``(.+)``(?!`)/mUsi', function ($match) use(&$tokens, $generator) {
            $id = $generator();
            $tokens[$id] = array('type' => 'literal', 'text' => htmlspecialchars($match[1]));
            return $id;
        }, $span);
        $environment = $parser->getEnvironment();
        $this->environment = $environment;
        // Replacing numbering
        foreach ($environment->getTitleLetters() as $level => $letter) {
            $span = preg_replace_callback('/\\#\\' . $letter . '/mUsi', function ($match) use($environment, $level) {
                return $environment->getNumber($level);
            }, $span);
        }
        // Signaling anonymous names
        $environment->resetAnonymousStack();
        if (preg_match_all('/(([a-z0-9]+)|(`(.+)`))__/mUsi', $span, $matches)) {
            foreach ($matches[2] as $k => $y) {
                $name = $matches[2][$k] ?: $matches[4][$k];
                $environment->pushAnonymous($name);
            }
        }
        // Looking for references to other documents
        $span = preg_replace_callback('/:([a-z0-9]+):`(.+)`/mUsi', function ($match) use(&$environment, $generator, &$tokens) {
            $section = $match[1];
            $url = $match[2];
            $id = $generator();
            $anchor = null;
            $text = null;
            if (preg_match('/^(.+)<(.+)>$/mUsi', $url, $match)) {
                $text = $match[1];
                $url = $match[2];
            }
            if (preg_match('/^(.+)#(.+)$/mUsi', $url, $match)) {
                $url = $match[1];
                $anchor = $match[2];
            }
            $tokens[$id] = array('type' => 'reference', 'section' => $section, 'url' => $url, 'text' => $text, 'anchor' => $anchor);
            $environment->found($section, $url);
            return $id;
        }, $span);
        // Link callback
        $linkCallback = function ($match) use($environment, $generator, &$tokens) {
            $link = $match[2] ?: $match[4];
            $id = $generator();
            $next = $match[5];
            $url = null;
            if (preg_match('/^(.+) <(.+)>$/mUsi', $link, $match)) {
                $link = $match[1];
                $environment->setLink($link, $match[2]);
                $url = $match[2];
            }
            $tokens[$id] = array('type' => 'link', 'link' => $link, 'url' => $url);
            return $id . $next;
        };
        // Replacing anonymous links
        $span = preg_replace_callback('/(([a-z0-9]+)|(`(.+)`))__([^a-z0-9]{1}|$)/mUsi', $linkCallback, $span);
        // Replacing links
        $span = preg_replace_callback('/(([a-z0-9]+)|(`(.+)`))_([^a-z0-9]{1}|$)/mUsi', $linkCallback, $span);
        $this->tokens = $tokens;
        $this->parser = $parser;
        $this->span = $span;
    }