What are the differences between variadic templates and std::variadic?

Can you explain the differences between variadic templates and std::variadic in C++?

Sure! Variadic templates are a feature in C++11 that allows functions and classes to accept a variable number of template parameters. On the other hand, std::variadic is part of the C standard library and provides a way to handle a variable number of arguments in functions.

What are the advantages of using variadic templates over std::variadic?

Variadic templates offer type safety and can work with any type of argument, while std::variadic requires you to use specific types like std::tuple or std::initializer_list. This makes variadic templates more flexible.

Can you give an example of how to use variadic templates?

Absolutely! Here's a simple example:

template<typename... Args>
void print(Args... args) {
    (std::cout << ... << args) << '\n';
}

This function can take any number of arguments and print them.

Are there any performance differences between the two?

Yes, variadic templates can be more efficient because they are resolved at compile time, while std::variadic may involve runtime overhead due to type erasure.