CODEWITHSUNDEEP
c++boostc++11shared-ptr
Stephane Rolland
Stephane Rolland

Reputation: 39926

Cohabitation of boost::shared_ptr and std::shared_ptr

I want to use boost::log at some point, but I cannot pass a std::shared_ptr as a parameter, because the compiler (VS2010) cannot convert it into a boost::shared_ptr.

I don't really like the fact that they are aliens to one another.

Is there a safe and transparent way to convert one into the another, so as they don't stumble over each other?

I don't think it is duplicate of this question that states both are the same.

Upvotes: 48

Views: 8373

Answers (1)

ronag
ronag

Reputation: 51283

You could do it like this:

template<typename T>
boost::shared_ptr<T> make_shared_ptr(std::shared_ptr<T>& ptr)
{
    return boost::shared_ptr<T>(ptr.get(), [ptr](T*) mutable {ptr.reset();});
}

template<typename T>
std::shared_ptr<T> make_shared_ptr(boost::shared_ptr<T>& ptr)
{
    return std::shared_ptr<T>(ptr.get(), [ptr](T*) mutable {ptr.reset();});
}

EDIT: Note that this does not work with weak references to the source ptr. So be careful with those!

Upvotes: 74

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