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  1. #include <iostream>
  2. #include <tuple>
  3. #include <string>
  4.  
  5. // helper function to print a tuple of any size
  6. template<class Tuple, std::size_t N>
  7. struct TuplePrinter {
  8.     static void print(const Tuple& t) 
  9.     {
  10.         TuplePrinter<Tuple, N-1>::print(t);
  11.         std::cout << ", " << std::get<N-1>(t);
  12.     }
  13. };
  14.  
  15. template<class Tuple>
  16. struct TuplePrinter<Tuple, 1> {
  17.     static void print(const Tuple& t) 
  18.     {
  19.         std::cout << std::get<0>(t);
  20.     }
  21. };
  22.  
  23. template<class... Args>
  24. void print(const std::tuple<Args...>& t) 
  25. {
  26.     std::cout << "(";
  27.     TuplePrinter<decltype(t), sizeof...(Args)>::print(t);
  28.     std::cout << ")\n";
  29. }
  30. // end helper function
  31.  
  32. int main()
  33. {
  34.     std::tuple<int, std::string, float> t1(10, "Test", 3.14);
  35.     int n = 7;
  36.     auto t2 = std::tuple_cat(t1, std::make_pair("Foo", "bar"), t1, std::tie(n));
  37.     n = 10;
  38.     print(t2);
  39. }
Success #stdin #stdout 0s 3232KB
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Standard input is empty
stdout
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(10, Test, 3.14, Foo, bar, 10, Test, 3.14, 10)
https://ideone.com/A1LNMu
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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