{}
#include <iostream>
#include <vector>
#include <set>
template<typename T>
class DetectFind
{
struct Fallback { int find; }; // add member name "find"
struct Derived : T, Fallback { };
template<typename U, U> struct Check;
typedef char Yes[1]; // typedef for an array of size one.
typedef char No[2]; // typedef for an array of size two.
template<typename U>
static No& func(Check<int Fallback::*, &U::find> *);
template<typename U>
static Yes& func(...);
public:
typedef DetectFind type;
enum { value = sizeof(func<Derived>(0)) == sizeof(Yes) };
};
int main()
{
std::cout << DetectFind<std::vector<int> >::value << ' '
<< DetectFind<std::set<int> >::value << std::endl;
return 0;
}