fork download
copy 
  1. // Showing how the use of template template parameters is probably
  2. // the most robust solution.
  3. // DD
  4. //
  5. #include <iostream>
  6. #include <complex>
  7. #include <memory>
  8. #include <vector>
  9.  
  10. template <typename T>
  11.      struct GBM
  12. {
  13.      T operator () () const
  14.      {
  15.           return T(-1);
  16.      }
  17. };
  18. template <typename T>
  19.      struct Jump
  20. {
  21.      T operator () () const
  22.      {
  23.           return T(99999);
  24.      }
  25. };
  26.  
  27. template <typename T, template <typename T> class SDE>
  28.      struct FDM
  29. {
  30.      T operator ()() const
  31.      {
  32.           SDE<T> sde;
  33.           return T(0.01)*sde();
  34.      }
  35. };
  36.  
  37. template <typename T, template <typename T> class SDE, template<typename T, template <typename T> class SDE> class FDM>
  38.      struct FDM_II
  39. {
  40.      FDM_II() {}
  41.      T operator ()() const
  42.      {
  43.           SDE<T> sde;
  44.           FDM<T, SDE> fdm;
  45.  
  46.           return fdm()*sde();
  47.      }
  48. };
  49.  
  50. int main()
  51. {
  52.      FDM<double, GBM> mySolver;
  53.      std::cout << mySolver() << std::endl;
  54.  
  55.      FDM<double, Jump> mySolver2;
  56.      std::cout << mySolver2() << std::endl;
  57.  
  58.      FDM<double, std::allocator> mySolver3;
  59.      std::cout << mySolver() << std::endl;
  60.  
  61.      FDM_II<float, GBM, FDM> fdmII;
  62.      std::cout << "fdmII: " << fdmII() << std::endl;
  63.  
  64.      FDM_II<std::complex<int>, Jump, FDM> fdmIIA;
  65.      std::cout << "fdmIIA: " << fdmIIA() << std::endl;
  66.  
  67.      FDM_II<std::vector<double>, std::allocator, FDM> fdmIIB;
  68.      //std::cout << "fdmIIB: " << fdmIIB() << std::endl;
  69.  
  70.      return 0;
  71. }
  72.  
  73.  
Success #stdin #stdout 0s 3020KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
-0.01
999.99
-0.01
fdmII: 0.01
fdmIIA: (0,0)
https://ideone.com/A4uZSR
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!