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  1. #include <iostream>
  2. #include <array>
  3. #include <algorithm>
  4.  
  5. template< typename T,
  6. 		  size_t sizeA,
  7. 		  size_t sizeB  >
  8. std::array<T, sizeA+sizeB> operator<<(const std::array<T, sizeA> &one,
  9. 									  const std::array<T, sizeB> &two)
  10. {
  11.     std::array<T, sizeA + sizeB> result;
  12.  
  13.     // copy first part to the new array
  14.     auto endOfFirst = std::copy(std::cbegin(one),
  15.     							std::cend(one),
  16.     							std::begin(result));
  17.  
  18.     // copy a rest of elements from second array
  19.     std::copy(std::cbegin(two),
  20.     		  std::cend(two),
  21.     		  endOfFirst);
  22.  
  23. 	// sort results
  24.     std::sort(std::begin(result),std::end(result));
  25.     return result;
  26. }
  27.  
  28. int main() {
  29. 	std::array<int, 3> a = {1, 2, 3};
  30. 	std::array<int, 5> b = {8, 7, 6, 5, 4};
  31.  
  32. 	auto result = b << a; // the type is std::array<int, N+M>
  33.  
  34. 	for (auto item : result) {
  35. 		std::cout << item << "|";
  36. 	}
  37.  
  38. 	return 0;
  39. }
Success #stdin #stdout 0s 15240KB
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1|2|3|4|5|6|7|8|
https://ideone.com/BvsMCE
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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