Chapter 4

1. Structured binding provides the ability to retrieve the result of a structure by manually providing individual variables, for example, auto [first, second] = std::pair{1, 2}
2. You can now list nested namespace on the same line
3. You no longer need to provide an error message
4. Provides you with the ability to define a variable inside an if statement
5. Resource acquisition is initialization
6. To acquire and initialize a resource on construction and release the resource on destruction
7. States who owns a pointer (that is, the entity responsible for deleting the pointer)
8. Expects() defines a functions input expectations and Ensures() defines a function's output