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  1. /*
  2.   That's how operator<< and >> should've been overloaded. 
  3.   Alexandr Poltavsky
  4. */
  5.  
  6. #include <vector>
  7. #include <iostream>
  8.  
  9. template<class T0, class T1> auto& operator<<( std::vector<T0>& vec, T1&& value ) {
  10. 	vec.push_back( std::forward<T1>( value ) );
  11. 	return vec;
  12. }
  13.  
  14. template<class T0, class T1> auto& operator>>( std::vector<T0>& vec, T1& value ) {
  15. 	value = vec.back();
  16. 	vec.pop_back();
  17. 	return vec;
  18. }
  19.  
  20. int main() {
  21.  
  22. 	std::vector<int> v{1,2,3};
  23. 	int i{}; 
  24.  
  25. 	for(auto i : v) std::cout << i <<" ";
  26. 	std::cout << std::endl;
  27.  
  28. 	v << 4 << 5;
  29.  
  30. 	for(auto i : v) std::cout << i <<" ";
  31. 	std::cout << std::endl;
  32.  
  33. 	v >> i;
  34. 	std::cout << "i = " << i << std::endl;
  35.  
  36. 	for(auto i : v) std::cout << i <<" ";
  37. 	std::cout << std::endl;
  38.  
  39. }
  40.  
Success #stdin #stdout 0s 3460KB
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stdin
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Standard input is empty
stdout
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1 2 3 
1 2 3 4 5 
i = 5
1 2 3 4
https://ideone.com/glqESs
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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