Thread: vectors of 'new' classes

OK suppose I had a code like this

Code:

vector<base *> vec;

vec.push_back(new derived());

delete vec[0];

Code like this does compile, but I don't think I'm grasping this correctly. Basically I'd like to have a container of new classes, and be able to access them (let's say 4 different classes all pushed onto the vector). My concerns are, does this cause any sort of memory leaks (let's say even with the class destructors being all in order). Does this just make a copy of the derived classes? From what I can understand the vector elements are just pointers to whatever objects.

Am I overthinking this?

You will have to manage the vector just like you would manage any other newed pointer. So, you're not over thinking it.

Additionally, smart pointers such as std::shared_ptr (requires C++11 support) or boost::shared_ptr will serve as a container for your pointer, so you are over thinking it.

Additionally, unless you are using polymorphism, you will have to cast the pointer with dynamic_cast to call derived methods. So you're not over thinking it.

Additionally, polymorphism is a wonderful tool, so if you're not using it, you're probably not thinking enough.

Thanks for the quick reply, guys. My next question is, do you have any references to a good tutorial on smart pointers? I've yet to learn these, and I must know the ins and outs .

RTFM. Sorry but smart pointers are all different. A good smart pointer class will behave a lot like a regular pointer though.