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<?php
/*
* This file is part of the rybakit/msgpack.php package.
*
* (c) Eugene Leonovich <[email protected]>
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace MessagePack\TypeTransformer;
use MessagePack\Packer;
abstract class Extension implements CanPack, CanUnpackExt
{
private $type;
public function __construct(int $type)
$this->type = $type;
}
public function getType() : int
return $this->type;
public function pack(Packer $packer, $value) : ?string
if (null === $data = $this->packExt($packer, $value)) {
return null;
return $packer->packExt($this->type, $data);
abstract protected function packExt(Packer $packer, $value) : ?string;