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  1. #include <iostream>
  2. #include <vector>
  3. #include <set>
  4. #include <functional>
  5. #include <iostream>
  6. using namespace std;
  7.  
  8. template <typename A, typename B> 
  9. auto map( const A & source, const B & b )
  10. -> std::vector< decltype( b(*source.begin()) ) >
  11. {
  12. 	auto result = std::vector< decltype( b(*source.begin()) ) >();
  13. 	for( auto & element: source)
  14. 	{
  15. 		result.push_back( b(element) );
  16. 	}
  17. 	return result;
  18. }
  19.  
  20. float convert( int num )
  21. {
  22. 	return num;
  23. }
  24.  
  25. int main() {
  26.  
  27. 	std::vector<int> ints = {1,2,3,4,5};
  28. 	std::set<int> int_set = {7,8,9};
  29. 	std::vector<float> floats = map( ints, []( int v) -> float { return v;} );
  30. 	std::vector<float> floats2 = map( int_set, []( int v) -> float { return v;} );
  31. 	for( auto & n: floats)
  32. 	{
  33. 		std::cout << n << std::endl;
  34. 	}
  35.  
  36. 	std::cout << "---" << std::endl;
  37. 	for( auto & n: floats2)
  38. 	{
  39. 		std::cout << n << std::endl;
  40. 	}
  41.  
  42. 	return 0;
  43. }
Success #stdin #stdout 0s 5584KB
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https://ideone.com/LqwVV5
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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