Does a Priority Queue implementation exist out there?

[Dylan Knutson]

Hello,

I can't find a priority queue implementation in Phobos. This 
struck me as odd, because std.container has a few common 
containers already, and priority queues are used very often. 
Perhaps it exists in another module?

In case there is indeed not a PQ container in Phobos, is there a 
priority queue implementation out there that is relatively battle 
hardened, doesn't rely on the GC much (if at all), and will work 
when compiled for 64 bit?

Thank you,
--Dylan