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--- designpatterns [2015/03/25 16:25]
+++ designpatterns [2022/04/16 12:22] (current)
@@ Line 1: / Line 1: @@
+===== Reference =====
+  * design pattern matrix
+  * http://www.netobjectives.com/download/dpmatrix.pdf
+  * http://uml.org.cn/sjms/pdf/dpmatrix.pdf
+  * http://sourcemaking.com/design_patterns# CPlusPlus
+  * [[Livre]] : http://rzr.online.fr/isbn/2841773507 # Design patterns Tête la première (Broché) fr
+  * https://github.com/jwasham/coding-interview-university#dont-feel-you-arent-smart-enough# LearN
+  * https://www.fluentcpp.com/2020/12/18/on-design-patterns-in-cpp/#
+===== TEMPLATES =====
+  // file:///~/singleton.hpp
+  template <class T>
+  class Singleton
+  {
+  public:
+  static T* get() {
+    if ( instance == 0 ) instance = new T;
+    return instance;
+  }
+  protected:
+  Singleton() { }
+  ~Singleton() {  }
+  private:
+  static T* instance;
+  };
+  template<class T>
+  T* Singleton<T>::instance = NULL; // here the tricky part
+  // file:///~/main.cpp
+  #include <string>
+  using namespace std;
+  #include "singleton.hpp"
+  int main()
+  {
+  Singleton<string>::get();
+  return EXIT_SUCCESS;
+  }
+Note: [[Microsoft]] msvs allows default types , not GCC so avoid those :
+  template<class T = char> //...
+===== TEMPLATES & DESIGN PATTERN =====
+what do u think of this weird code :
+  /// Design Pattern (with templates)
+  template <class T>
+  class VisitorAble {
+  public:
+   virtual int visit(T & in_data)=0;
+  };
+  template <class T>
+  class AcceptAble {
+  public:
+   virtual int accept(T & in_visitor) { in_visitor.visit( *this ); }
+  };
+  class Visitor : public Visitor<Data> { public: ... visit ... };
+  class Data : public AcceptAble<VisitorAble<Data> >  {};
+  // recursive template ?
+===== MORE =====
+@TaG: [[Design]] [[Pattern]] [[C++]] [[CPlusPlus]] [[templates]] [[DP]] [[pointers]] [[OOP]] [[STL]] [[auto_ptr]] [[boost]]