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AutoBoxType.php
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AutoBoxType.php
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<?php
/*
* (c) Alexandre Quercia <alquerci@email.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Instinct\Component\TypeAutoBoxing;
use Instinct\Component\TypeAutoBoxing\Memory\Memory;
/**
* Extend it to enforce strong typing.
*
* @author Alexandre Quercia <alquerci@email.com>
*
* @api
*/
abstract class AutoBoxType extends Type
{
/**
* @var integer|string
*/
private $memoryId;
/**
* Use strong typing to ensure a certain type.
*
* Declares a new pointer and assign it year object.
*
* @param NULL $pointer
* @param mixed $value [Optional]
*
* @throws \LogicException When trying to redefine a pointer.
*
* @api
*/
final static public function create(&$pointer, $value = null)
{
if ($pointer !== null) {
throw new \LogicException(sprintf(
'The identifier of type "%s" is defined more than once. '.
'The first argument of "%s()" must be null or undefined.',
gettype($pointer),
__METHOD__
));
}
if ($value instanceof static) {
$pointer = clone $value;
} else {
$pointer = new static($value);
}
// Allocate the pointer.
$pointer->memoryId = Memory::alloc($pointer);
}
/**
* @api
*/
final public function __destruct()
{
if ($this->memoryId === null) {
return;
}
$pointer = &Memory::get($this->memoryId);
$value = $pointer;
if ($value !== $this && $value !== null) {
$pointer = null;
self::create($pointer, $value);
}
// Removing the obsolete pointer.
Memory::free($this->memoryId);
}
}