Copy-and-Swap Idiom

The Copy-and-Swap idiom is a programming technique used to implement safe and efficient assignment operations for objects, especially in C++. It involves creating a copy of the source object, then swapping its data with the current object. This approach ensures strong exception safety, meaning if copying fails, the original object remains unchanged. It also simplifies resource management by reusing the swap operation. Overall, the idiom helps manage complex object copying and assignment reliably, preventing resource leaks and ensuring consistent program behavior during object updates.