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  1. #include <iostream>
  2. #include <vector>
  3. #include <functional>
  4. #include <iostream>
  5. using namespace std;
  6.  
  7. template <typename A, typename B> 
  8. auto map( const std::vector<A> & source, const B & b )
  9. -> std::vector< decltype( b(source[0]) ) >
  10. {
  11. 	auto result = std::vector< decltype( b(source[0]) ) >();
  12. 	for( auto & n: source)
  13. 	{
  14. 		result.push_back( b(n) );
  15. 	}
  16. 	return result;
  17. }
  18.  
  19. float convert( int num )
  20. {
  21. 	return num;
  22. }
  23.  
  24. int main() {
  25.  
  26. 	std::vector<int> ints = {1,2,3,4,5};
  27. 	std::vector<float> floats = map( ints, []( int v) -> float { return v;} );
  28. 	for( auto & n: floats)
  29. 	{
  30. 		std::cout << n << std::endl;
  31. 	}
  32. 	return 0;
  33. }
Success #stdin #stdout 0.01s 5304KB
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stdin 
Standard input is empty
stdout 
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https://ideone.com/FfMCXq
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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