Destructor for static fields. Singleton realization

Question

So, classic simple Singleton realization is following:

class Singleton
{
private:
    static Singleton* singleton;
    Singleton() {}
public:
    static Sing         


        

Answer 1

Why you should avoid such code, when there is no matching delete for new

While there is no actual memory leak (in most modern operating systems), worse thing is that your Singleton destructor doesn't get called. And if you acquire some resources, they propbably would leak.

What can be done here

Use smart pointer to store instance, consider std::unique_ptr (with C++11) or boost::auto_ptr