Some C++ patterns

cpppatterns.md

C++ patterns

singleton

// http://www.modernescpp.com/index.php/thread-safe-initialization-of-a-singleton
// fast and thread safe

class MySingleton{
public:
  static MySingleton& getInstance(){
    static MySingleton instance;
    return instance;
  }
private:
  MySingleton()= default;
  ~MySingleton()= default;
  MySingleton(const MySingleton&)= delete;
  MySingleton& operator=(const MySingleton&)= delete;
};