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  1. #include <stdio.h>
  2. #include <vector>
  3. using namespace std;
  4. struct Space2
  5. {
  6.     struct Vector
  7.     {
  8.  
  9.     };
  10.  
  11. };
  12. struct Space3
  13. {
  14.     struct Vector
  15.     {
  16.  
  17.     };
  18.  
  19. };
  20.  
  21. template<typename Space>
  22. struct ParticleData{};
  23.  
  24. template <>
  25. struct ParticleData<Space2>
  26. {
  27.   float orientation;
  28.   float invInertia;
  29.   ParticleData()
  30.   {
  31.     orientation = 2.0f ;
  32.     invInertia = 3.0f;
  33.   }
  34. };
  35.  
  36. template <>
  37. struct ParticleData<Space3>
  38. {
  39.     float test;
  40.     ParticleData()
  41.     {
  42.         test = 100500.0f;
  43.     }
  44. };
  45.  
  46. template<typename T>
  47. struct Dumper
  48. {
  49. };
  50.  
  51. template <typename T>
  52. struct Overload{};
  53.  
  54. template<typename Space,typename AwesomeParam>
  55. struct ParticleSystem
  56. {
  57.   struct Particle : public ParticleData<Space>
  58.   {
  59.     float someGenericStuff;
  60.   };
  61.  
  62.   void DumpParticles();
  63.  
  64.   ParticleSystem()
  65.   {
  66.     particles.push_back(Particle());
  67.   }
  68.   std::vector<Particle> particles;
  69. };
  70.  
  71. template<>
  72. struct Dumper<ParticleSystem<Space2,char> >
  73. {
  74.   static void Do(ParticleSystem<Space2,char>::Particle& p)
  75.   {
  76.     printf("2: %f %f\n", p.orientation, p.invInertia );
  77.   }
  78. };
  79.  
  80. template<>
  81. struct Dumper<ParticleSystem<Space3,float> >
  82. {
  83.   static void Do(ParticleSystem<Space3,float>::Particle& p)
  84.   {
  85.     printf("3: %f\n", p.test );
  86.   }
  87. };
  88.  
  89. template<typename Space,typename AwesomeParam>
  90. void ParticleSystem<Space,AwesomeParam>::DumpParticles()
  91. {
  92.   for(size_t particleIndex = 0; particleIndex < particles.size(); particleIndex++)
  93.   {
  94.     Dumper<ParticleSystem<Space,AwesomeParam> >::Do(particles[particleIndex]);
  95.   }
  96. }
  97.  
  98.  
  99. int main()
  100. {
  101.     ParticleSystem<Space3,float> p3;
  102.     ParticleSystem<Space2,char> p2;
  103.     p3.DumpParticles();
  104.     p2.DumpParticles();
  105.     return 0;
  106. }
  107.  
Success #stdin #stdout 0s 2816KB
comments (?)
stdin 
Standard input is empty
stdout 
3: 100500.000000
2: 2.000000 3.000000
https://ideone.com/UD533F
language:
C++ 4.3.2 (gcc-4.3.2)
created:
11 years ago
visibility:
public

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