c++ - is this code safe? cast a std::vector to std::vector -



c++ - is this code safe? cast a std::vector<Derived*> to std::vector<Base*> -

basically i've class a , class b : public a.

and i'd cast std::shared_ptr<std::vector<a*> std::shared_ptr<std::vector<b*>

the problem std::vector<b> doesn't inherit std::vector<a>, , smart_ptr neither. horrible cast:

std::shared_ptr<vectora> vector_a = * ((std::shared_ptr<vectora>*)&vector_b);

the code compiles , runs there, safe? http://liveworkspace.org/code/3dqtz1$0

strictly speaking dereferencing operations should succeed. both vectors pointer containers, casting 1 another, whilst unacceptable production code, still utilize same dimensions , alignment.

c++ provides rich abstractions avoid these shenanigans though, improve populate vector of derived objects pointers base of operations class.

c++ inheritance casting

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