如何为多个选项使用相同的路线（Laravel 5）

I need to have a route for multiple pricing levels (bronze, silver and gold). Currently I have:

Route::get('/{level}', [ 'as' => 'pricing', 'uses' => 'PagesController@pricing']);

However, this matches anything, how can I make so it matches only: bronze, silver or gold while reading the value in my controller like this:

public function pricing($level) {
    $data['level'] = $level;
    return View::make('pages.pricing', $data);
}

I would suggest just handling this inside the function using a switch-case statement (or if/else).

public function pricing() {
    switch ($level) {
        case 'silver':
            // do something
            break;
        case 'bronze':
            // do something
            break;
        case 'gold':
            // do something
            break;
        default:
            throw new \Exception('not one of bronze. silver or gold');
    }
}

However you could write

Route::get('/{level}', [ 'as' => 'pricing', 'uses' => 'PagesController@pricing'])->where('level', '(bronze|silver|gold)');