Re: The C++ Language 4th edition - Subclassing vector for range checking.

In The C++ Programing Language 4.4.1.2 Stroustrup says "... I often
use a simple range-checking adaption of vector:"

template<typename T>
class Vec : public std::vector<T> {
public:
    using vector<T>::vector;

    T & operator[](int i)
        {return vector<T>::at(i);}

    const T & operator[](int i) const
         {return vector<T>::at(i);}
};

I thought this was some what dangerous because if an user of the class
(Maybe not the person who wrote it) writes:

Vector<T> * vectorObject = new Vec<int>(100);
delete vectorObject;

Results in undefined behavior.

Did something change in C++11?