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  1. #include <iostream>
  2. #include <list>
  3. #include <functional>
  4. #include <algorithm>
  5.  
  6. class A
  7. {                                                                                                                                           
  8.     public:                                                                                                                                 
  9.         virtual         void                            link                    (A&)    = 0;                                                
  10.         virtual         void                            link                    (A*)    = 0;                                                
  11.         virtual         std::function<void(int)>        getFunction2SetProperty ()      = 0;                                                
  12. };                                                                                                                                          
  13.  
  14. class B: public A                                                                                                                           
  15. {                                                                                                                                           
  16.     public:                                                                                                                                 
  17.         virtual void    prop1           (int i)                                                                                             
  18.         {
  19.           std::cout << "B::" << __func__ << ",i=" << i << std::endl;
  20.           send(i);
  21.         };
  22.  
  23.         virtual void    link            (A*     those) override
  24.         {
  25.             sendList.push_back          (those->getFunction2SetProperty ());
  26.         };
  27.         virtual void    link            (A&     those) override
  28.         {
  29.             link (&those);
  30.         };
  31.  
  32.         virtual std::function<void(int)>        getFunction2SetProperty () override
  33.         {
  34.             return std::bind (&B::prop1, this, std::placeholders::_1);
  35.         };
  36.  
  37.  
  38.     protected:
  39.         virtual void    send            (int i)
  40.         {
  41.             for (std::function<void(int)>& f : sendList) f(i);
  42.         };
  43.  
  44.         std::list<std::function<void(int)>>     sendList;
  45. };
  46.  
  47. class BB: public B
  48. {
  49.     public:
  50.         virtual void    prop1           (int i) override
  51.         {
  52.           std::cout << "BB::" << __func__ << ",i=" << i << std::endl;
  53.           send(i);
  54.         };
  55. };
  56.  
  57.  
  58. class C: public A
  59. {
  60.     public:
  61.         virtual void    propInteger     (int i)
  62.         {
  63.           std::cout << "C::" << __func__ << ", i=" << i << std::endl;
  64.             send(i);
  65.         };
  66.  
  67.         virtual void    link            (A*     those) override
  68.         {
  69.             sendList.push_back  (those->getFunction2SetProperty ());
  70.         };
  71.         virtual void    link            (A&     those) override
  72.         {
  73.             link (&those);
  74.         };
  75.  
  76.         virtual std::function<void(int)>        getFunction2SetProperty () override
  77.         {
  78.             return std::bind (&C::propInteger, this, std::placeholders::_1);
  79.         };
  80.  
  81.     protected:
  82.         virtual void    send            (int i)
  83.         {
  84.             for (std::function<void(int)>& f : sendList) f(i);
  85.         };
  86.  
  87.         std::list<std::function<void(int)>>     sendList;
  88. };
  89.  
  90. class CC: public C
  91. {
  92.     public:
  93.         virtual void    propInteger     (int i) override
  94.         {
  95.           std::cout << "CC::" << __func__ << ", i=" << i << std::endl;
  96.           send (i);
  97.         };
  98. };
  99.  
  100. int
  101. main ()
  102. {
  103.     A*          a1 = new BB;
  104.     A*          a2 = new CC;
  105.  
  106.     a1->link (a2);
  107.     std::function<void(int)>    f = a1->getFunction2SetProperty ();
  108.     f(123);
  109.     delete a1;
  110.     delete a2;
  111.  
  112.     return 0;
  113. };
Success #stdin #stdout 0s 3476KB
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Standard input is empty
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BB::prop1,i=123
CC::propInteger, i=123
https://ideone.com/AsTkhr
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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