/**
* Build the token container, parsed from the provided document
*
* @param string $document Document to parse
* @return array Container of nested tokens
*/
public function buildContainer($document)
{
// Find the start and end tokens
$startRegex = '/(' . $this->delimiters['variable'][0] . '|' . $this->delimiters['block'][0] . ')+/';
$endRegex = '/(' . $this->delimiters['variable'][1] . '|' . $this->delimiters['block'][1] . ')+/';
preg_match_all($startRegex, $document, $start, PREG_OFFSET_CAPTURE + PREG_SET_ORDER);
preg_match_all($endRegex, $document, $end, PREG_OFFSET_CAPTURE + PREG_SET_ORDER);
// Walk through our matches
$match = new Matches($start, $end, $this->delimiters);
$result = $match->walk($document);
$container = $this->nest($result);
return $container;
}