/**
* Creates the parameter.
*
* @param string $name The parameter name.
* @param int $flags A bitwise combination of the flag
* constants in this class.
* @param null $defaultValue The default value of the parameter. Must
* only be set for optional parameters.
* @param string|null $description A human-readable description.
*/
public function __construct($name, $flags = self::OPTIONAL, $defaultValue = null, $description = null)
{
Assert::parameterName($name);
Assert::nullOrInteger($flags, 'The parameter "$flags" must be an integer or null. Got: %s');
Assert::nullOrParameterValue($defaultValue);
Assert::nullOrString($description, 'The parameter description must be a string or null. Got: %s');
Assert::nullOrNotEmpty($description, 'The parameter description must not be empty.');
if ($flags & self::REQUIRED && null !== $defaultValue) {
throw new RuntimeException('Required parameters cannot have default values.');
}
$this->name = $name;
$this->flags = (int) $flags;
$this->defaultValue = $defaultValue;
$this->description = $description;
}