Gergely Nagy shardator

Print type:

#include <cxxabi.h>
...
auto print_type = []<typename TT>(TT&&) { 
        int s; return abi::__cxa_demangle(typeid(TT).name(),0,0,&s); };

In variant:

	#include <boost/asio.hpp>
	#include <boost/asio/ip/multicast.hpp>
	#include <iostream>
	#include <string>
	#include <functional>
	#include <vector>
	#include <span> // C++20
	#include <stdexcept>

	class MulticastClient {

	#include <boost/asio.hpp>
	#include <iostream>
	#include <string>
	#include <stdexcept>
	#include <unordered_map>

	class MulticastServer {
	public:
	// Constructor throws on critical errors (e.g., invalid bind address or socket open fail).
	explicit MulticastServer(const std::string &bind_address = "0.0.0.0", int failure_threshold = 3)

	namespace detail {

	template<size_t M, size_t N>
	struct gcd_impl {
	static constexpr size_t R = (N == 0) ? 0 : (M % N);
	static constexpr size_t value = (R == 0) ? N : gcd_impl<N,R>::value;
	};

	template<size_t M> struct gcd_impl<M,0> { static constexpr size_t value = M; };
	template<size_t N> struct gcd_impl<0,N> { static constexpr size_t value = 0; };