think\console\input\Option::__construct PHP Method

    public function __construct($name, $shortcut = null, $mode = null, $description = '', $default = null)
    {
        if (0 === strpos($name, '--')) {
            $name = substr($name, 2);
        }
        if (empty($name)) {
            throw new \InvalidArgumentException('An option name cannot be empty.');
        }
        if (empty($shortcut)) {
            $shortcut = null;
        }
        if (null !== $shortcut) {
            if (is_array($shortcut)) {
                $shortcut = implode('|', $shortcut);
            }
            $shortcuts = preg_split('{(\\|)-?}', ltrim($shortcut, '-'));
            $shortcuts = array_filter($shortcuts);
            $shortcut = implode('|', $shortcuts);
            if (empty($shortcut)) {
                throw new \InvalidArgumentException('An option shortcut cannot be empty.');
            }
        }
        if (null === $mode) {
            $mode = self::VALUE_NONE;
        } elseif (!is_int($mode) || $mode > 15 || $mode < 1) {
            throw new \InvalidArgumentException(sprintf('Option mode "%s" is not valid.', $mode));
        }
        $this->name = $name;
        $this->shortcut = $shortcut;
        $this->mode = $mode;
        $this->description = $description;
        if ($this->isArray() && !$this->acceptValue()) {
            throw new \InvalidArgumentException('Impossible to have an option mode VALUE_IS_ARRAY if the option does not accept a value.');
        }
        $this->setDefault($default);
    }