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  1.     #include <iostream>
  2.     #include <typeinfo>
  3.     using namespace std;
  4.  
  5.     template <typename T>
  6.     class someContainer
  7.     {
  8.     private:
  9.         T val1;
  10.         T val2;
  11.     public:
  12.         someContainer(const T& in1, const T& in2)
  13.             :val1(in1), val2(in2) {}
  14.  
  15.         template <typename Ret = bool ,typename Ty = T>
  16.         void sort(Ret (*_comp)(const Ty&, const Ty&))
  17.         {
  18.             cout << "Comp is of type: " << typeid(_comp).name() << endl;
  19.             cout << _comp(val1, val2) << endl;
  20.             return;
  21.         }
  22.     };
  23.  
  24.     template <typename Ret, typename R>
  25.     Ret compare(const R& a, const R& b)
  26.     {
  27.         return a>b;
  28.     }
  29.  
  30.     int main()
  31.     {
  32.         someContainer<int> myCont(7,6);
  33.         myCont.sort(compare); 
  34.  
  35.         cin.ignore();
  36.         return 0;
  37.     }
Success #stdin #stdout 0s 2856KB
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Standard input is empty
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Comp is of type: PFbRKiS0_E
1
https://ideone.com/NMalai
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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