Why std::move is just a cast, how it kills RVO if used wrong, and the mechanics of ownership transfer.
Learn how template parameter deduction and perfect forwarding eliminate hidden copies in generic C++ code. This deep dive covers forwarding references, reference collapsing, variadic templates, CTAD, and the mechanics of std::forward—with practical examples showing exactly when to use T&&, decltype(auto), and std::decay_t. Includes debugging techniques, common anti-patterns, and a complete decision tree for zero-overhead generic code.