variadic_print.cpp

#include <iostream>
#include <string>
#include <utility>
#include <boost/format.hpp>

template<typename T>
boost::format& apply_format_args(boost::format& form, T&& t)
{
	return form % std::forward<T>(t);
}

template<typename T, typename ...Ts>
boost::format& apply_format_args(boost::format& form, T&& t, Ts&&... ts)
{
	return apply_format_args(form % std::forward<T>(t), std::forward<Ts>(ts)...);
}

template<typename ...Ts>
void print(const std::string& formatStr, Ts&&... args)
{
	std::cout << apply_format_args(boost::format(formatStr), std::forward<Ts>(args)...) << std::endl;
}

int main() {
	print("%d %d %s", 1, 2, "hello world");
}