Understanding the 'auto' keyword in C++

2023/08/30

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The article explores the usage of the 'auto' keyword in C++ and how it can be used to simplify complicated declarations. It starts by breaking down a complex declaration into smaller pieces, similar to peeling back the layers of an onion. The author explains that 'auto' can be used with the trailing return type syntax to denote the return type of a function. The article then introduces a pattern of adding trailing return type layers to demonstrate the concept. It also mentions that functions decay to pointer to functions when passed by value. The final layer of the pattern involves adding another function pointer layer. The article provides examples and code snippets to illustrate each layer of the pattern. Overall, it offers a clear explanation of the 'auto' keyword and its usage in C++ declarations.