I have a set of shared pointers:

std::set<boost::shared_ptr<T>> set;

And a pointer:

T* p;

I would like to efficiently remove the element of set equal to p, but I can't do this with any of the members of set, or any of the standard algorithms, since T* is a completely different type to boost::shared_ptr<T>.

A few approaches I can think of are:

• somehow constructing a new shared_ptr from the pointer that won't take ownership of the pointed to memory (ideal solution, but I can't see how to do this)
• wrapping / re-implementing shared_ptr so that I can do the above
• just doing my own binary search over the set

Help!