C++ Move Semantics and Rvalue References Explained for Avoiding Copies

A guide on Code Beneath, republished on DEV Community, explains how rvalue references let C++ programs transfer resources instead of duplicating them. It walks through move constructors and move assignment operators with code examples, including a Vector class that swaps pointers rather than copying a million integers. The piece covers perfect forwarding with std::forward and how copy elision and NRVO can remove copies entirely. It closes with common mistakes, such as misusing std::move, omitting noexcept on move operations, and assuming moves always run.