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  1. template<class T>
  2. struct decompose;
  3.  
  4. template<class Func, class... Args>
  5. struct decompose<Func(Args...)>
  6. {
  7.     constexpr static int n = sizeof...(Args);
  8. };
  9.  
  10. template<class T>
  11. int deduce(T&& t)
  12. {
  13.     return decompose<T()>::n;
  14. }
  15.  
  16. int main()
  17. {
  18.     deduce([](){});
  19. }
Success #stdin #stdout 0s 3336KB
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https://ideone.com/8M1WBj
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
secret

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