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  1. #include <iostream>
  2. #include <tuple>
  3. #include <string>
  4. using namespace std;
  5.  
  6.  
  7. class MetaData
  8. {
  9. public:
  10. 	template<int ID, class T>
  11. 	void addVar(string varNames)
  12. 	{
  13. 		// do smth
  14. 		cout << "variable " << ID << " registered\n";
  15. 	}
  16.  
  17. 	template<int ID, class MSGT>
  18. 	struct addVarDesc
  19. 	{
  20. 		static void exec(MetaData& md, string varNames)
  21. 		{
  22. 			typedef typename std::tuple_element<ID, typename MSGT::values_type>::type varType;
  23. 			md.addVar<ID, varType>(varNames);
  24. 			addVarDesc<ID+1, MSGT>::exec(md, varNames);
  25. 		}
  26. 	};
  27.  
  28. 	template<class MSGT>
  29. 	struct addVarDesc<std::tuple_size<typename MSGT::values_type>::value, MSGT>
  30. 	{
  31. 		static void exec(MetaData& md, string varNames)
  32. 		{
  33.  
  34. 		}
  35. 	};
  36.  
  37. 	template<class MSGT>
  38. 	static MetaData createMetaData(string varNames)
  39. 	{
  40. 		MetaData md;
  41. 		MetaData::addVarDesc<0, MSGT>::exec(md, varNames);
  42. 		return md;
  43. 	}
  44. };
  45.  
  46. template<typename... Types>
  47. class Message
  48. {
  49. public:
  50. 	tuple<Types...> m_values;
  51. 	typedef tuple<Types...> values_type;
  52.  
  53. 	static MetaData m_meta;
  54. };
  55.  
  56. typedef Message<string, double> MyMessageType;
  57.  
  58. template<>
  59. MetaData MyMessageType::m_meta = MetaData::createMetaData<MyMessageType>("name\nmass");
  60.  
  61. int main() {
  62. 	// your code goes here
  63. 	return 0;
  64. }
Success #stdin #stdout 0s 3472KB
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stdin
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Standard input is empty
stdout
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variable 0 registered
variable 1 registered
https://ideone.com/dqVJbN
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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