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  1. #include <iostream>
  2. #include <string>
  3. #include <vector>
  4.  
  5.  
  6. struct in 
  7. {
  8.  std::vector<std::string> vec_str;
  9.  void add_strings(){}
  10.  
  11.  template<typename T, typename... Args>
  12.  void add_strings(T value, Args... args) {	
  13.  	vec_str.push_back(value);
  14.  	add_strings(args...);
  15.  }
  16.  
  17.  template<typename... Args>
  18.  in(Args... args) { 
  19.  	add_strings(args...);
  20.  }
  21. };
  22.  
  23. bool operator==(std::string const& str, in const& val) {
  24.  	for(auto &i : val.vec_str) {
  25.  		if(i == str)
  26.  			return true;
  27.  	}
  28.  	return false;	
  29. }
  30. // -----------------------------------------------------
  31.  
  32. int main(void) 
  33. {
  34. 	std::string lang, country = "GB";
  35.  
  36. 	if (country == in ("US","GB","AU")) {
  37. 		lang="en";
  38. 	}
  39.  
  40. 	std::cout << "lang = " << lang << std::endl;
  41.  
  42. 	return 0;
  43. }
  44.  
Success #stdin #stdout 0s 3460KB
comments (?)
stdin 
Standard input is empty
stdout 
lang = en
https://ideone.com/uYitwb
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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