#include <iostream>
#include <typeinfo>
#include <typeindex> // not sure that this include should be here, but g++ demands it
#include <sstream>
#include <unordered_map>
#include <type_traits>

using namespace std;

void pident(ostream &os, int ilvl) { for(int i=0;i<ilvl;i++) os << "\t"; }

void printxmlmembers(ostream &os, int ilvl) {
}

template<typename T, typename ...TailT>
void printxmlmembers(ostream &os, int ilvl, T &&x, TailT &&...tail) {
	static unordered_map<type_index,const char *> namelookup 
		{{type_index(typeid(int)),"int"},
	      {type_index(typeid(double)),"double"},
	      {type_index(typeid(char *)),"string"},
	      {type_index(typeid(const char *)),"string"},
	      {type_index(typeid(char * const)),"string"},
	      {type_index(typeid(const char * const)),"string"},
	      {type_index(typeid(char)),"char"}}; 
	pident(os,ilvl);
	const char *tname = namelookup[type_index(typeid(T))];
	os << "<" << tname;
	stringstream ss;
	ss << x;
	if (ss.str().length()>10) {
		os << ">" << ss.str() << "<\\";
		os << tname << ">" << endl;
	} else
		os << " value=\"" << ss.str() << "\"\\>" << endl;
	printxmlmembers(os,ilvl,forward<TailT>(tail)...);
}

template<typename ST, typename ...Ts>
void printxml(ostream &os, int ilvl, ST &&name, Ts &&...x) {
	pident(os,ilvl);
	os << "<" << name << ">" << endl;
	printxmlmembers(os,ilvl+1,forward<Ts>(x)...); // note syntax here
	pident(os,ilvl);
	os << "<\\" << name << ">" << endl;
}


int main(int argc, char **argv) {
	int a=1;
	const char *s = "hello";
	double d = 4.53;
	char c = '!';

	printxml(cout,0,"testpack",a,s,d,c,a,a,a,
		(const char *)"a really really really long string",5);
}