Copy-and-Swap Idiom
Explore the copy-and-swap idiom and its role in achieving strong exception safety in C++. Understand how this technique helps manage resources reliably by creating a temporary copy and swapping it, preventing partial modifications and resource leaks during exceptions.
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Before moving on to discuss the copy-and-swap idiom, let’s discuss the exception safety, which is important to understand the copy-and-swap idiom.
Exception safety
An operation can be considered exception-safe if those operations leave the object in a valid state. In short, the exception should not corrupt the program or leak resources. This means that all objects allocated using malloc or new are destroyed at the end, and all the resources are closed (RAII).
Note: David Abrahams is an author and computer programmer. He is well ...