Inserting a vector of unique_ptr into another vector

Question

I have a vector of unique_ptr\'s and I want to append them to another vector of unique_ptrs. I would normally do a simple insert:

std::vector

        

Answer 1

unique_ptr is not assignable with normal assignment operator (the error says it's deleted). You can only move them:

bar.insert(bar.end(),
    std::make_move_iterator(baz.begin()),
    std::make_move_iterator(baz.end())
);

Of course, this transfers the ownership of the managed object and original pointers will have nullptr value.

Answer 2

You can't copy them; you'll have to move them.

std::move(baz.begin(), baz.end(), std::back_inserter(bar));