#include <iostream>
#include <type_traits>
#include <vector>
 
class A
{
public:
    int a;
	int b;
};
 
template<typename T>
struct IsClass
{
	enum { Yes = std::is_class<T>::value };
	enum { No = !Yes };
};
 
int main(int argc, char* argv[])
{
	std::vector<int> v1;
	std::vector<A> v2;
	auto it1 = v1.begin();
	auto it2 = v2.begin();
 
	std::cout << IsClass<std::decay<decltype(it1)>::type::value_type>::Yes << std::endl;
	std::cout << IsClass<std::decay<decltype(it2)>::type::value_type>::Yes << std::endl;
 
	std::cin.get();
	return 0;
}

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