What are some examples of variadic templates in C++?

What are some examples of variadic templates in C++?

Variadic templates allow functions and classes to accept any number of template parameters. For example, you can create a function that sums any number of arguments.

Can you show me a code example of a variadic template function?

Sure! Here's a simple example:

template<typename... Args>
int sum(Args... args) {
    return (args + ...);
}

This function uses fold expressions to sum all the arguments.

What about using variadic templates with classes?

You can use variadic templates in classes as well. For instance:

template<typename... Args>
class Tuple {
public:
    Tuple(Args... args) {}
};

This class can hold a tuple of any number of elements.

Are there any limitations to using variadic templates?

Yes, variadic templates can be complex and may lead to longer compilation times. Additionally, debugging can be more challenging.