#include <type_traits>

template <
	typename ... Args,
	typename E = typename std::enable_if<(sizeof...(Args) > = 1), bool>::type
	>
void fun1(Args&& ... args)
{
}

template <
	typename ... Args,
	typename E = typename std::enable_if<(sizeof...(Args) > 1), bool>::type
	>
void fun2(Args&& ... args)
{
}

template <
	typename ... Args,
	typename E = typename std::enable_if<(sizeof...(Args) < 3), bool>::type
	>
void fun3(Args&& ... args)
{
}

