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  1. #include <iostream>
  2. #include <map>
  3. #include <tuple>
  4. #include <string>
  5. using namespace std;
  6.  
  7. struct demo{
  8. 	int x;
  9. };
  10.  
  11. inline bool operator< (const demo& lhs, const demo& rhs){ 
  12. 	return lhs.x < rhs.x;
  13. }
  14.  
  15. int main() {
  16. 	std::map<std::tuple<int,string,demo> ,int> a;
  17. 	a.emplace(std::make_tuple(1,"a",demo {5}),1);
  18. 	a.emplace(std::make_tuple(1,"a",demo {6}),2);
  19. 	a.emplace(std::make_tuple(1,"b",demo {5}),3);
  20. 	a.emplace(std::make_tuple(2,"a",demo {5}),4);
  21.  
  22. 	if(a.count(std::make_tuple(2,"a",demo {5}) )){
  23. 		cout << a[std::make_tuple(2,"a",demo {5})] << endl;
  24. 	}
  25. 	if(a.count(std::make_tuple(2,"c",demo {5}))){
  26. 		cout << a[std::make_tuple(2,"a",demo {5})] << endl;
  27. 	} else {
  28. 		cout << "Not there..." << endl;
  29. 	}
  30. 	return 0;
  31. }
Success #stdin #stdout 0s 3432KB
comments (?)
stdin 
Standard input is empty
stdout 
4
Not there...
https://ideone.com/ZcMg8O
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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