Serialization library with support for circular references?

[timotheecour via Digitalmars-d-learn]

On Saturday, 23 May 2015 at 08:01:28 UTC, timotheecour wrote:
> On Saturday, 10 November 2012 at 22:09:07 UTC, Andrej Mitrovic 
> wrote:
>> On 11/10/12, nixda <b at or.de> wrote:
>>> You can try vibe.d bson serialization.
>>> http://vibed.org/api/vibe.data.bson/serializeToBson
>>
>> It doesn't handle them either. Anyway I've implemented it for 
>> msgpack
>> (took a whole of 30 minutes, it's a great and readable 
>> codebase), I
>> just have to write some more extensive unittests to make sure
>> everything works ok.

Do you have any pointers to it?
This issue tracks this feature request:
https://github.com/msgpack/msgpack-d/issues/7
Thanks!