C++ has progressively optimized return value handling: pre-C++11 required copying returned objects, C++11 introduced move semantics to avoid copies, and C++17 implements return value optimization where objects are constructed directly in the caller's memory, eliminating the need for explicit move operations.
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Copy, Move, Then … NothingAdded:
Before C++ 11, returning an object often meant copying it. C++ 11 gave us standard move to avoid that copy. And in C++ 17, the compiler just builds the object in the caller, so you don't even need to move anymore.
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