向线程中的函数传入参数的注意事项

void f(int, std::string const&);

void oops(int some_parm)
{
    char buffer[100];
    sprintf(buffer, "%i", some_parm);
    //std::thread(f, 3, buffer)      //not do this
    std::thread(f, 3, string(buffer)) //instead of    
}

void find_by_idx(int&);

void opps_again()
{
    int idx = 6;
    //std::thread t(find_by_idx, idx);        //damn no
    std::thread t(find_by_idx, std::ref(idx)); //damn good
}

class X
{
public:
    void do_something(Type parm);
};

X my_x;
std:thread(&X::do_something, my_x; the_parm);