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  1. #include <vector>
  2. #include <iostream>
  3. #include <utility>
  4.  
  5. template <class TIterator>
  6. struct Range
  7. {
  8.  Range(const TIterator &begin, const TIterator &end)
  9.      :_begin(begin), _end(end) {}
  10.  
  11.  TIterator begin() { return _begin; }
  12.  TIterator end() { return _end; }
  13.  
  14. private:
  15.  TIterator _begin;
  16.  TIterator _end;
  17. };
  18.  
  19. template <class TRange>
  20. auto make_range(TRange r) -> Range<decltype(std::begin(r))>
  21. {
  22.     return { std::begin(r), std::end(r) };   
  23. }
  24.  
  25. template <class TRange>
  26. auto make_range2(TRange &r) -> Range<decltype(std::begin(r))>
  27. {
  28.     return { std::begin(r), std::end(r) };   
  29. }
  30.  
  31.  
  32. int main()
  33. {
  34.     std::vector<int> vec = {1,2,3,4,5};
  35.     auto r = make_range(vec);
  36.  
  37.     for (auto i : r)
  38.     {
  39.         std::cout << i << std::endl;   
  40.     }
  41.  
  42.     std::vector<int> vec2 = {1,2,3,4,5};
  43.     auto r2 = make_range2(vec2);
  44.  
  45.     for (auto i : r2)
  46.     {
  47.         std::cout << i << std::endl;   
  48.     }
  49.  
  50.     return 0;
  51. }
  52.  
Success #stdin #stdout 0s 3472KB
comments (?)
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stdout 
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https://ideone.com/YOAV8a
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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