CODEWITHSUNDEEP
c++boost
Zilberman Rafael
Zilberman Rafael

Reputation: 1451

Difference between boost ptr containers and normal containers?

What is the difference between using boost ptr containers and containers that contains smart pointers?

class A {} 

// ptr containers:
boost::ptr_unordered_map<int, A> p;

// containers:
boost::unordered_map<int, boost::intrusive_ptr<A>> m;

Upvotes: 0

Views: 149

Answers (1)

Drew Dormann
Drew Dormann

Reputation: 63755

boost::ptr_unordered_map does not have the reference-counting overhead that would be incurred in a container of boost::shared_ptr<A>

It also does not require the additional A object interface that boost::intrusive_ptr<A> demands.

That makes it a good solution for managing heap-allocated objects that do not require reference counting of the contained objects.

Upvotes: 1

Related Questions