Using of rvalue references in c++11

Question

I would like to implement a function that fills up a vector and then returns an rvalue reference. I tired something like:

std::vector &&fi         


        

Answer 1

If you just remove the && from your function it should work, but it will not be a reference. fill_list() will create a vector and return it. During the return a new vector will be created. The first vector that was created inside fill_list() will be copied to the new vector and then will be destroyed. This is the copy constructor's work.