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  1. #include <string>
  2. #include <iostream>
  3. #include <regex>
  4. using namespace std;
  5.  
  6. int main() {
  7. 	std::regex r(R"((\b[[:alpha:]]+\b)|(\b\d+\b))");
  8. 	std::string s = "foo bar 123";
  9. 	for(std::sregex_iterator i = std::sregex_iterator(s.begin(), s.end(), r);
  10.                              i != std::sregex_iterator();
  11.                              ++i)
  12.     {
  13.         std::smatch m = *i;
  14.         std::cout << "Match value: " << m.str() << " at Position " << m.position() << '\n';
  15.  
  16.         for(auto index = 1; index < m.size(); ++index ){
  17.         	if (m[index].matched) {
  18. 				std::cout << "Capture group ID: " << index-1 << std::endl;
  19. 				break;
  20.         	}
  21. 		}
  22.     }
  23. 	return 0;
  24. }
  25.  
Success #stdin #stdout 0.01s 5460KB
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stdin
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Standard input is empty
stdout
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Match value: foo at Position 0
Capture group ID: 0
Match value: bar at Position 4
Capture group ID: 0
Match value: 123 at Position 8
Capture group ID: 1
https://ideone.com/mU5rU9
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
secret

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