/**
* Creates a new command name.
*
* @param string $string The command name.
* @param string[] $aliases The alias names.
*/
public function __construct($string, array $aliases = array())
{
Assert::string($string, 'The command name must be a string. Got: %s');
Assert::notEmpty($string, 'The command name must not be empty.');
Assert::regex($string, '~^[a-zA-Z0-9\\-]+$~', 'The command name must contain letters, digits and hyphens only. Got: "%s"');
Assert::allString($aliases, 'The command aliases must be strings. Got: %s');
Assert::allNotEmpty($aliases, 'The command aliases must not be empty.');
Assert::allRegex($aliases, '~^[a-zA-Z0-9\\-]+$~', 'The command aliases must contain letters, digits and hyphens only. Got: "%s"');
$this->string = $string;
$this->aliases = $aliases;
}