test_uniq.cc

#include <iostream>
#include <utility>
#include <memory>

using namespace std;

int main() {

        std::unique_ptr<int> upi(new int(5));

        cout << *upi << "\n";

//  won't compile
//      auto func = [](std::unique_ptr<int> u) { cout << "*upi is: " << *u << "\n"; }; 
//      func(upi);

        auto func = bind([](const std::unique_ptr<int>& u) {
                                                        cout << "*upi is: " << *u << "\n";
                                        },
                                move(upi)
                        );

        func(upi);

        cout << (upi ? "Valid pointer. " : "null pointer.") << "\n";

        return 0;
}