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  1. #include <iostream>
  2. #include <map>
  3. #include <string>
  4. #include <utility>
  5.  
  6. using namespace std;
  7.  
  8. template <typename T>
  9. void foo(T& arg) {
  10. 	const string key = "value"s;
  11. 	const auto it = arg.find(key);
  12.  
  13. 	if(it == arg.end()) {
  14. 	    arg.insert(make_pair(key, 1));
  15. 	} else {
  16. 	    int prev_value = it->second;
  17. 	    prev_value++;
  18. 	    arg.insert(make_pair(key, prev_value));
  19. 	}
  20. }
  21.  
  22. int main() {
  23. 	map<string, long> whatYouDefined;
  24.  
  25. 	foo(whatYouDefined);
  26.  
  27. 	cout << "first: " << crbegin(whatYouDefined)->first << " second: " << crbegin(whatYouDefined)->second << endl;
  28.  
  29. 	map<string, unsigned int> whatYouThoughtYouDefined;
  30.  
  31. 	foo(whatYouThoughtYouDefined);
  32.  
  33. 	cout << "first: " << crbegin(whatYouThoughtYouDefined)->first << " second: " << crbegin(whatYouThoughtYouDefined)->second << endl;
  34.  
  35. }
Success #stdin #stdout 0s 3472KB
comments (?)
stdin 
Standard input is empty
stdout 
first: value second: 1
first: value second: 1
https://ideone.com/NfB1qa
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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