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  1. #include <iostream>
  2. #include <string>
  3. #include <tr1/tuple>
  4.  
  5. template<std::size_t> struct int_{};
  6.  
  7. template<class Tuple, std::size_t I>
  8. void print_tuple(std::ostream& os, Tuple const& tuple, int_<I>){
  9.   print_tuple(os, tuple, int_<I-1>());
  10.   os << ", " << *std::tr1::get<I>(tuple);
  11. }
  12.  
  13. template<class Tuple>
  14. void print_tuple(std::ostream& os, Tuple const& tuple, int_<0>){
  15.   os << *std::tr1::get<0>(tuple);
  16. }
  17.  
  18. template<class Tuple>
  19. void print_tuple(std::ostream& os, Tuple const& tuple)
  20. {
  21.   os << '(';
  22.   print_tuple(os, tuple, int_<std::tr1::tuple_size<Tuple>::value-1>());
  23.   os << ")\n";
  24. }
  25.  
  26. template<typename T1                                                                 , typename T> std::tr1::tuple<T1               ,const T*> operator<<(const std::tr1::tuple<T1               >& tuple, const T& obj) {return std::tr1::tuple<T1               ,const T*>(std::tr1::get<0>(tuple)                                                                                                           , &obj);}
  27. template<typename T1, typename T2                                                    , typename T> std::tr1::tuple<T1,T2            ,const T*> operator<<(const std::tr1::tuple<T1,T2            >& tuple, const T& obj) {return std::tr1::tuple<T1,T2            ,const T*>(std::tr1::get<0>(tuple), std::tr1::get<1>(tuple)                                                                                                    , &obj);}
  28. template<typename T1, typename T2, typename T3                                       , typename T> std::tr1::tuple<T1,T2,T3         ,const T*> operator<<(const std::tr1::tuple<T1,T2,T3         >& tuple, const T& obj) {return std::tr1::tuple<T1,T2,T3         ,const T*>(std::tr1::get<0>(tuple), std::tr1::get<1>(tuple), std::tr1::get<2>(tuple)                                                                           , &obj);}
  29. template<typename T1, typename T2, typename T3, typename T4                          , typename T> std::tr1::tuple<T1,T2,T3,T4      ,const T*> operator<<(const std::tr1::tuple<T1,T2,T3,T4      >& tuple, const T& obj) {return std::tr1::tuple<T1,T2,T3,T4      ,const T*>(std::tr1::get<0>(tuple), std::tr1::get<1>(tuple), std::tr1::get<2>(tuple), std::tr1::get<3>(tuple)                                                  , &obj);}
  30. template<typename T1, typename T2, typename T3, typename T4, typename T5             , typename T> std::tr1::tuple<T1,T2,T3,T4,T5   ,const T*> operator<<(const std::tr1::tuple<T1,T2,T3,T4,T5   >& tuple, const T& obj) {return std::tr1::tuple<T1,T2,T3,T4,T5   ,const T*>(std::tr1::get<0>(tuple), std::tr1::get<1>(tuple), std::tr1::get<2>(tuple), std::tr1::get<3>(tuple), std::tr1::get<4>(tuple)                         , &obj);}
  31. template<typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T> std::tr1::tuple<T1,T2,T3,T4,T5,T6,const T*> operator<<(const std::tr1::tuple<T1,T2,T3,T4,T5,T6>& tuple, const T& obj) {return std::tr1::tuple<T1,T2,T3,T4,T5,T6,const T*>(std::tr1::get<0>(tuple), std::tr1::get<1>(tuple), std::tr1::get<2>(tuple), std::tr1::get<3>(tuple), std::tr1::get<4>(tuple), std::tr1::get<5>(tuple), &obj);}
  32.  
  33. struct nil {};
  34.  
  35. template<typename T>
  36. std::tr1::tuple<const T*> operator<<(const nil&, const T& obj)
  37. {
  38.     return std::tr1::tuple<const T*>(&obj);
  39. }
  40.  
  41. int main()
  42. {
  43. 	nil lhs;
  44.  
  45.     int i = 42;
  46. 	print_tuple(std::cout, lhs << i);
  47. 	print_tuple(std::cout, lhs << 42);
  48. 	print_tuple(std::cout, lhs << 42 << 42);
  49. 	print_tuple(std::cout, lhs << 42 << 47.11);
  50. 	print_tuple(std::cout, lhs << i << 47.11 << "blah");
  51.  
  52. 	return 0;
  53. }
  54.  
Success #stdin #stdout 0.01s 2680KB
comments (?)
stdin
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Standard input is empty
stdout
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(42)
(42)
(42, 42)
(42, 47.11)
(42, 47.11, blah)
https://ideone.com/tjbA9B
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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