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Classes and Resource Ownership · 3:52
Move Semantics
A deep copy is safe but slow, and many copies come from temporaries that are about to die anyway. We count the doubles copied by r = x + y + z, write a move constructor that steals the buffer instead, and see what std::move really does and what a moved-from object is left holding.
You will learn
- Explain why copying temporaries wastes work
- Write a move constructor and move assignment that steal a buffer and leave the source empty
- Explain what std::move actually does (a cast, not a move)
- State what you may do with a moved-from object