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  1. #include <regex>
  2. #include <iostream>
  3.  
  4. char const* trackData = "%B341111597242000^ISO/AMEX TEST             ^1412101000000000000000000000000?";
  5. enum class CardIssuer { Unknown, AmericanExpress };
  6.  
  7. CardIssuer m_issuer;
  8.  
  9. void IdentifyIssuer()
  10. {
  11. 	try {
  12. 	   // Assume unknown by default to handle failures.
  13. 	   m_issuer = CardIssuer::Unknown;
  14.  
  15. 	   std::regex magStripe{R"(^%B(\d+)\^)"};
  16. 	   std::cout << "blah" << std::endl;
  17. 	   std::cmatch matches;
  18.  
  19. 	   if (std::regex_search(trackData, matches, magStripe))
  20. 	   {
  21. 	      std::string const& pan = matches[1];
  22.  
  23. 	      std::cout << pan << std::endl;
  24.  
  25. 	   }
  26. 	}
  27. 	catch( std::regex_error const& e )
  28. 	{
  29. 		using namespace std::regex_constants;
  30.  
  31. 		switch(e.code())
  32. 		{
  33. 		case error_escape:
  34. 			std::cout << "error_escape" << std::endl;
  35. 			break;
  36.  
  37. 		default:
  38. 			std::cout << "unknown code" << std::endl;
  39. 			break;
  40. 		}
  41.  
  42. 		std::cout << e.code() << std::endl;
  43. 	}
  44. }
  45.  
  46. int main()
  47. {
  48.     IdentifyIssuer();
  49. }
Success #stdin #stdout 0s 3500KB
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stdin
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Standard input is empty
stdout
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error_escape
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https://ideone.com/qFAbWc
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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