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  1. #include <iostream>
  2.  
  3. class Old
  4. {
  5.     protected:
  6.         long val;
  7.     public:
  8.         long myVal()
  9.         {
  10.             return val;
  11.         }
  12.  
  13.         void myVal(long val)
  14.         {
  15.             this->val = val;
  16.         }
  17. };
  18.  
  19. template<typename T> class In: virtual public Old
  20. {
  21.     protected:
  22.         T value;
  23.  
  24.     public:
  25.         void setValue(T val)
  26.         {
  27.             value = val;
  28.         }
  29.  
  30.         T getValue()
  31.         {
  32.             return value;
  33.         }
  34. };
  35.  
  36.  
  37. class My: public In<int>, public In<bool>
  38. {
  39.  
  40. };
  41.  
  42. int main(int argc, char **argv)
  43. {
  44.     My m;
  45.     m.myVal(100);
  46.     In<int> iv = m;
  47.     std::cout << "start_ils: " << m.In<int>::getValue() << std::endl;
  48.     std::cout << "start_vs: "<< iv.getValue() << std::endl;
  49.     m.In<int>::setValue(10);
  50.     std::cout << "=== old's val ===" << std::endl;
  51.     std::cout << "old_vs: "<<iv.myVal() << std::endl;
  52.     std::cout << "old_ilsi: " << m.In<int>::myVal() << std::endl;
  53.     std::cout << "old_ilsb: " << m.In<bool>::myVal() << std::endl;
  54.     std::cout << "=== set_ils ===" << std::endl;
  55.     std::cout << "get_ils: " << m.In<int>::getValue() << std::endl;
  56.     std::cout << "get_vs: "<< iv.getValue() << std::endl;
  57.     iv.setValue(10);
  58.     std::cout << "=== set_vs ===" << std::endl;
  59.     std::cout << "get_ils: " << m.In<int>::getValue() << std::endl;
  60.     std::cout << "get_vs: "<< iv.getValue() << std::endl;
  61. }
Success #stdin #stdout 0s 3140KB
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stdin
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Standard input is empty
stdout
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start_ils: 1
start_vs: 1
=== old's val ===
old_vs: 100
old_ilsi: 100
old_ilsb: 100
=== set_ils ===
get_ils: 10
get_vs: 1
=== set_vs ===
get_ils: 10
get_vs: 10
https://ideone.com/kC0TSX
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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