#include <iostream>
#include <type_traits>
#include <string>
#include <cstdint>
 
template <typename... Ts>
struct have_common_type 
{
	using yes = char[1];
	using no = char[2];
 
	template <typename... Us>
	static yes& test(typename std::common_type_t<Us...>*);
 
	template <typename...>
	static no& test(...);
 
	static constexpr bool value = sizeof(test<Ts...>(nullptr)) == sizeof(yes);
};
 
int main()
{
	std::cout << have_common_type<int, std::uint32_t, char>::value << std::endl; // 1
	std::cout << have_common_type<int, bool, std::string>::value << std::endl;   // 0
	return 0;
}

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