#include <functional>
#include <iostream>
#include <memory>

struct test
{
    test() = default;
    test(const test &)
    {
        std::cout << "copied" << std::endl;
    }
    void func(int i)
    {
        std::cout << i << std::endl;
    }
};


int main()
{
    std::unique_ptr<test> tp = std::make_unique<test>();
    std::function<void(int)> f1 = std::bind(&test::func, tp, std::placeholders::_1);
}