Latte\PhpWriter::expandCastPass PHP Method

    public function expandCastPass(MacroTokens $tokens)
    {
        $res = new MacroTokens('[');
        $expand = NULL;
        while ($tokens->nextToken()) {
            if ($tokens->isCurrent('(expand)') && $tokens->depth === 0) {
                $expand = TRUE;
                $res->append('],');
            } elseif ($expand && $tokens->isCurrent(',') && !$tokens->depth) {
                $expand = FALSE;
                $res->append(', [');
            } else {
                $res->append($tokens->currentToken());
            }
        }
        if ($expand === NULL) {
            $res->append(']');
        } else {
            $res->prepend('array_merge(')->append($expand ? ', [])' : '])');
        }
        return $res;
    }