Serializable returning BSON class

[rbro]

This is related to #495 that I submitted earlier. Because I couldn't extend MongoDB\BSON\UTCDateTime, I attempted the below using MongoDB\BSON\Serializable to return an object of type MongoDB\BSON\UTCDateTime, but it's throwing an error that bsonSerialize must return either an array or stdClass. Could bsonSerialize be updated to allow a BSON class to be returned?

<?php
class abc implements MongoDB\BSON\Serializable
{
	private $o_object = null;

	public function __construct($milliseconds)
	{
		$this->o_object = new MongoDB\BSON\UTCDatetime($milliseconds);
	}

	function bsonSerialize()
	{
		return $this->o_object;
	}
}

$collection = (new MongoDB\Client)->example->users;

$collection->insertOne(array(
	'abc' => new abc(100),
));

The error is:

Uncaught MongoDB\Driver\Exception\UnexpectedValueException: Expected abc::bsonSerialize() to return an array or stdClass, MongoDB\BSON\UTCDateTime given

Thanks for your help.

[derickr]

I think that the type wrapping that I explained in #495 will also solve this case.

[rbro]

Thanks, yes, it will cover it.