What is the copy-and-swap idiom?
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Answer / Sonam Tyagi
The copy-and-swap idiom is a technique used in C++ to efficiently perform assignment operations while minimizing temporary object creation. It consists of three steps: (1) Copy the right-hand side object into a temporary object using the copy constructor. (2) Swap the contents of the temporary object with the left-hand side object using swap function. (3) Destroy the right-hand side object. This idiom avoids some potential problems like resource leaks and undefined behavior caused by swapping raw pointers.
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