How do I handle constant object when implementing shared pointer in c++?

Question

Due to project restrictions, I can't use boost or more modern C++. I have implemented a shared pointer that works for my project needs but I'm struggling with handling constant objects.

I need to be able to do something like -

SharedPtr<MyData> sp(new MyData()); SharedPtr<const MyData> const_sp(sp);

Check whether your environment has the TR1 extensions: http://stackoverflow.com/a/2918235/103167 Using `std::tr1::shared_ptr` will be a lot less painful than rolling your own, you've only scratched the surface of how complicated it gets. — Ben Voigt, Apr 27 '15 at 14:10
I was looking for a quick and dirty shared pointer implementation. Due to nature of the project, didn't have access to either of those three libraries. Thanks for the link though! — Andy, Apr 27 '15 at 19:56

score 0 · Accepted Answer · answered Apr 27 '15 at 14:00

0

You could make a templated copy-constructor which will allow you to copy-construct from SharedPtr instances with a compatible template argument:

template <typename T>
class SharedPtr {
    template <typename U>
    SharedPtr (const SharedPtr<U> &rhs);
}

answered Apr 27 '15 at 14:00

TartanLlama

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How do I handle constant object when implementing shared pointer in c++?

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