#include <iostream>
#include "boost/regex.hpp"

void boostTest()
{
	std::string toTest = "abc<NPC><NPC>12345</NPC>1</NPC>2<NPC>3</NPC>";
	std::string regstr = "<(?<HtmlTag>NPC)>((?<Nested><\k<HtmlTag>>)|</\k<HtmlTag>>(?<-Nested>)|.*?)*</\k<HtmlTag>>";
	boost::smatch what;
	boost::regex expr(regstr);
	std::string::const_iterator start = toTest.begin();
	std::string::const_iterator end = toTest.end();
	int pos = 0;
	while (boost::regex_search(start, end, what, expr))
	{
		std::cout << "Match group " << ++pos << ":" << std::endl;
		for (int i = 0; i < what.size(); i++)
		{
			std::string msg(what[i].first, what[i].second);
			std::cout << i << ": " << msg.c_str() << std::endl;
		}
		start = what[0].second;
	}
}

int main()
{
	boostTest();
	return 0;
}