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  1. #include <iostream>
  2. #include <vector>
  3. using namespace std;
  4.  
  5. struct VectorCache
  6. {
  7.     VectorCache() : instance_counter_(++s_instance_counter_) { }
  8.  
  9.     template<typename T>
  10.     std::vector<T>& GetTs()
  11.     {
  12.         static std::vector<std::vector<T>> tss;
  13.         if (tss.size() <= instance_counter_)
  14.             tss.resize(instance_counter_);
  15.         return tss[instance_counter_];
  16.     }
  17.  
  18.     size_t instance_counter_;
  19.     static size_t s_instance_counter_;
  20. };
  21. size_t VectorCache::s_instance_counter_;
  22.  
  23. int main()
  24. {
  25. 	VectorCache vc1, vc2;
  26. 	std::vector<int>* pi1 = &vc1.GetTs<int>();
  27. 	std::vector<float>* pf1 = &vc1.GetTs<float>();
  28. 	std::vector<int>* pi2 = &vc2.GetTs<int>();
  29. 	std::vector<float>* pf2 = &vc2.GetTs<float>();
  30. 	std::cout << pi1 << ' ' << pf1 << ' ' << pi2 << ' ' << pf2 << '\n';
  31. }
Success #stdin #stdout 0s 3476KB
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Standard input is empty
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0x87fd014 0x87fd024 0x87fd040 0x87fd060
https://ideone.com/ByJZ1y
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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