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// sub_match::str
#include <iostream>
#include <string>
#include <regex>
int main ()
{
using namespace std::regex_constants;
std::cmatch m;
std::regex_match ( "subject", m, std::regex("(sub)(.*)") );
std::string output = "matches:\n";
for (std::cmatch::iterator it = m.begin(); it!=m.end(); ++it) {
output+= it->str() + "\n";
}
std::cout << output << std::endl;
return 0;
}
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