https://master--suspicious-stonebraker-7d2d21.netlify.app/tags/design-pattern/ Recent content in Design Pattern on Nikhil's blog Hugo -- gohugo.io en-US Mon, 02 Nov 2009 16:19:00 +0000 https://master--suspicious-stonebraker-7d2d21.netlify.app/post/2009/macros-for-observers/ Mon, 02 Nov 2009 16:19:00 +0000 https://master--suspicious-stonebraker-7d2d21.netlify.app/post/2009/macros-for-observers/ Here are two little macros too make implementing the Observer design pattern less repetitive. This is C++ File: observermacros.h #ifndef DDM_OBSERVERMACRO_H #define DDM_OBSERVERMACRO_H #define MAKE_OBSERVABLE( obscls ) \ private:\ std::list< obscls *> m_observers;\ public:\ void addObserver( obscls *obs ) {\ m_observers.push_back( obs );\ }\ void delObserver( obscls *obs ) {\ m_observers.remove( obs );\ } #define NOTIFY( obscls, obsmethod, argument ) \ for( std::list::const_iterator it = m_observers.begin();\ it != m_observers.end(); it++ )\