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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. template <typename T>
  5. class DoubleBuffer {
  6. public:
  7.     using value_type = T;
  8.     using reference = T&;
  9.     using const_reference = T const &;
  10.     using const_type = const typename T::type;
  11.     using pointer = T*;
  12.     //...
  13. };
  14.  
  15. template <typename T>
  16. struct Dummy {
  17. 	using type = T;
  18. };
  19.  
  20. int main() {
  21.     Dummy<int> dummy;
  22.     DoubleBuffer<Dummy<int>>::value_type vt = dummy;
  23.     DoubleBuffer<Dummy<int>>::reference ref = dummy;
  24.     DoubleBuffer<Dummy<int>>::const_reference cref = dummy;
  25.     DoubleBuffer<Dummy<int>>::const_type ct = 12345;
  26.     DoubleBuffer<Dummy<int>>::pointer p = &dummy;
  27.  
  28. 	return 0;
  29. }
Success #stdin #stdout 0s 4528KB
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https://ideone.com/wHT6w8
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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