Re: Binary heap: obtain a _reference_ to the front of the heap

[Johan Engelen via Digitalmars-d-learn]

On Tuesday, 13 September 2016 at 08:55:15 UTC, Nicholas Wilson 
wrote:
On Tuesday, 13 September 2016 at 08:19:04 UTC, Johan Engelen 
wrote:
In the binary heap documentation, I read that 
`BinaryHeap.front()` "Returns a copy of the front of the 
heap". [1]
Is there no function to access the front of the heap without a 
copy?  (micro-optimization)

Thanks,
  Johan
[1] 
https://dlang.org/phobos/std_container_binaryheap.html#.BinaryHeap.front

What does
foreach(ref e; bh)
{
     //...
}
do?

It copies the front of the heap on every iteration.