What is std::move(), and when should it be used?

Question

1. What is it?
2. What does it do?
3. When should it be used?

Good links are appreciated.

Answer 1

You can use move when you need to "transfer" the content of an object somewhere else, without doing a copy (i.e. the content is not duplicated, that's why it could be used on some non-copyable objects, like a unique_ptr). It's also possible for an object to take the content of a temporary object without doing a copy (and save a lot of time), with std::move.

This link really helped me out :

http://thbecker.net/articles/rvalue_references/section_01.html

I'm sorry if my answer is coming too late, but I was also looking for a good link for the std::move, and I found the links above a little bit "austere".

This puts the emphasis on r-value reference, in which context you should use them, and I think it's more detailed, that's why I wanted to share this link here.