#include <iostream>
#include <vector>
 
template<typename C>
struct IsIterable
{
    typedef char true_type;
    typedef long false_type;
 
    template<class T> static true_type  is_beg_iterable(int i,
        typename T::const_iterator = C().begin());
    template<class T> static false_type is_beg_iterable(...);
 
    enum { value = sizeof(is_beg_iterable<C>(0)) == sizeof(true_type) };
};
 
int main() {
    std::cout << IsIterable<std::vector<int>>::value << std::endl;
    std::cout << IsIterable<int>::value << std::endl;
}
 

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