Why does std.container.BinaryHeap use RefCounted?

[Shammah Chancellor via Digitalmars-d]

On 2014-12-16 07:57:32 +0000, Tobias Pankrath said:

> Original: http://forum.dlang.org/thread/uapqmdbtadpwnciwfdwn@forum.dlang.org
> Reposting here, because I got no answer in D.learn:
> 
> std.container.BinrayHeap
> (http://dlang.org/library/std/container/BinaryHeap.html)
> implements a binary heap on top of a) a given random access range
> or b) another container that supports random access.
> 
> Regardless of it's underlying data structure type, it wraps its
> store in RefCounted, but I don't see why this is necessary.
> 
> In case b) the container itself uses reference counting, so
> holding a simple reference to a container should be enough.
> 
> In case a) the given range might use ref counting under the hood,
> see b). Or not, than it is probably relying on the GC, and no
> reference count is needed.

I ran into the same issue with one of the other containers the other 
day.  It was causing me a substantial amount of confusion has it was 
automatically deallocating things I put into it for reasons I did not 
care to understand at the time.

-Shammah