Singleton< T > Class Template Reference

Basic support for the singleton pattern. More...

#include <ql/patterns/singleton.hpp>

Inheritance diagram for Singleton< T >:

Static Public Member Functions
static T &	instance ()
	access to the unique instance

Detailed Description

template<class T>
class QuantLib::Singleton< T >

Basic support for the singleton pattern.

The typical use of this class is:

class Foo : public Singleton<Foo> {
    friend class Singleton<Foo>;
  private:
    Foo() {}
  public:
    ...
};

which, albeit sub-optimal, frees one from the concerns of creating and managing the unique instance and can serve later as a single implemementation point should synchronization features be added.