class_level_customized_new_handler.cpp

template<typename T>
class NewHandlerSupport
{
    public:
        static std::new_handler set_new_handler(std::new_handler p) throw();
        static void* operator new(std::size_t size) throw(std::bad_alloc);
        ...
    private:
        static std::new_handler currentHandler;
};

template<typename T>
std::new_handler NewHandlerSupport<T>::set_new_handler(std::new_handler p) throw()
{
    std::new_handler oldHandler = currentHandler;
    currentHandler = p;
    return oldHandler;
}

template<typename T>
void* NewHandlerSupport<T>::operator new(std::size_t) throw(std::bad_alloc)
{
    // NewHandlerHolder is a RAII class and it resotre global
    // new_handler when out of scope
    NewHandlerHolder h(std::set_new_handler(currentHandler));
    return ::operator new(size);
}

template<typename T>
std::new_handler NewHandlerSupport<T>::currentHandler = 0;

class Foo: public NewHandlerSupport<Foo>
{
    ...
};