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  1.     #include <iostream>
  2.     #include <utility>
  3.     #include <list>
  4.  
  5.     template <typename... Args>
  6.     struct prank
  7.             : std::integral_constant<std::size_t, 9> {};
  8.  
  9.     template <template <typename...> class C,typename T, typename ...Args>
  10.     struct prank<C<T,Args...>>
  11.             : std::integral_constant<
  12.             std::size_t,
  13.             1+ prank<Args...>::value> {};
  14.  
  15.     int main()
  16.     {
  17.         using T = std::list<int>;
  18.         std::cout << prank<T>::value << "\n";
  19.     }
Success #stdin #stdout 0s 3296KB
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https://ideone.com/bTfvfs
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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