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  1. 	#include <iostream>
  2. 	#include <string>
  3.  
  4. 	template <typename T, typename F>
  5. 	void print(T t, F transformer){
  6. 		transformer(t);
  7. 		std::cout << t << std::endl;
  8. 	}
  9.  
  10. 	template <typename T>
  11. 	void print(T t){
  12. 		std::cout << t<<std::endl;
  13. 	}
  14.  
  15. 	template <typename... Params>
  16. 	void printLabeled(std::string label, Params&&... params){
  17. 		std::cout << label << ": ";
  18. 		print(std::forward<Params>(params)...);
  19. 	}
  20.  
  21. 	int main() {
  22. 		//prints the number '1', as expected
  23. 		print(1);
  24.  
  25. 		//prints the number the label "answer" and then the number one
  26. 		printLabeled("answer",1);
  27.  
  28. 		//This does was the above line was intended to do
  29. 		print(1, [](int& num){num+=1;});
  30.  
  31. 		//I intended this to be the labeled version of the above line,
  32. 		//but for some reason, this doesn't work anymore
  33. 		printLabeled("answer", 1, [](int& num){num+=1;});
  34.  
  35. 		return 0;
  36. 	}
  37.  
Success #stdin #stdout 0s 3460KB
comments (?)
stdin 
Standard input is empty
stdout 
1
answer: 1
2
answer: 2
https://ideone.com/JTYUpa
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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