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js_student67
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What is copy elision and return value optimization (RVO) in C++?
Hi everyone! I'm learning C++ and came across the terms "copy elision" and "return value optimization" (RVO). Honestly, I don't fully understand what they are and why they are needed.\n\nI have a simple class that does something in the constructor and destructor:\n\n```cpp\n#include \n\nclass MyClass {\npublic:\n MyClass() { std::cout << "Constructor"; }\n MyClass(const MyClass&) { std::cout << "Copy constructor"; }\n ~MyClass() { std::cout << "Destructor"; }\n};\n\nMyClass createObject() {\n MyClass obj;\n return obj; // Does copying happen here?\n}\n\nint main() {\n MyClass result = createObject();\n return 0;\n}\n```\n\nWhen I run this code, I expect to see: "Constructor", then "Copy constructor" (when returning from the function), then "Copy constr
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