What are the benefits of using variadic templates in C++?

What are the benefits of using variadic templates in C++?

Variadic templates allow you to create functions and classes that can take a variable number of arguments, making your code more flexible and reusable.

Can you give me an example of how they work?

Sure! For instance, you can create a function that sums any number of arguments using variadic templates. Here's a simple example: template<typename... Args> auto sum(Args... args) { return (args + ...); }.

What are some use cases for variadic templates?

They are great for creating generic data structures, implementing type-safe callbacks, and writing more concise and maintainable code.

Are there any downsides to using them?

One downside is that they can make code harder to read and understand for those unfamiliar with the syntax, and they may lead to longer compile times.