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<?php
/**
* This file is part of phpDocumentor.
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*
* @copyright 2010-2015 Mike van Riel<mike@phpdoc.org>
* @license http://www.opensource.org/licenses/mit-license.php MIT
* @link http://phpdoc.org
*/
namespace phpDocumentor\Reflection\Types;
use phpDocumentor\Reflection\Type;
/**
* Value Object representing a Compound Type.
*
* A Compound Type is not so much a special keyword or object reference but is a series of Types that are separated
* using an OR operator (`|`). This combination of types signifies that whatever is associated with this compound type
* may contain a value with any of the given types.
*/
final class Compound implements Type
{
/** @var Type[] */
private $types = [];
/**
* Initializes a compound type (i.e. `string|int`) and tests if the provided types all implement the Type interface.
*
* @param Type[] $types
*/
public function __construct(array $types)
{
foreach ($types as $type) {
if (!$type instanceof Type) {
throw new \InvalidArgumentException('A compound type can only have other types as elements');
}
}
$this->types = $types;
}
/**
* Returns the type at the given index.
*
* @param integer $index
*
* @return Type|null
*/
public function get($index)
{
if (!$this->has($index)) {
return null;
}
return $this->types[$index];
}
/**
* Tests if this compound type has a type with the given index.
*
* @param integer $index
*
* @return bool
*/
public function has($index)
{
return isset($this->types[$index]);
}
/**
* Returns a rendered output of the Type as it would be used in a DocBlock.
*
* @return string
*/
public function __toString()
{
return implode('|', $this->types);
}
}