private function parseShortArgument($command, $arguments, &$argPointer, &$output)
    {
        $argument = $arguments[$argPointer];
        $option = $this->retrieveOptionFromCache($command, substr($argument, 1, 1));
        $value = true;

        if (isset($option['type'])) {
            if (substr($argument, 2) != "") {
                $value = substr($argument, 2);
            } else {
                $value = $this->getNextValueOrFail($arguments, $argPointer, $option['name']);
            }
        }

        $this->assignValue($option, $output, $option['name'], $value);
    }