使用move_iterator访问向量

Question

I have a std:vector where MyClass can not be copied (copy constructor and assignment constructor are delete), but can be moved

I would like to access the elements in a for loop, how can I do this:

for(MyClass c : my_vector) {
    //c should be moved out of my_vector
} // after c goes out of scope, it get's destructed (and no copies exist anymore)

I found the move_iterator but I can't figure out how to use it properly in a for loop.

Answer 1

Iterate by reference and move:

for (auto & x : v) { foo(std::move(x)); }

It may even be more appropriate to use the std::move - algorithm , from <algorithm> , the one that's like std::copy . Alternatively maybe something like std::transform together with make_move_iterator() might suit.

Answer 2

Something like

for(MyClass &c : my_vector) {
   do_something_with(std::move(c));
}

would be what I'd normally do.