What are advanced C++ templates and how can I use them?

What are advanced C++ templates and how can I use them?

Advanced C++ templates allow for more flexible and reusable code through features like template specialization and variadic templates.

Can you explain template specialization with an example?

Sure! Template specialization allows you to define a specific implementation of a template for a particular type. For example:

template <typename T>
class MyClass {
public:
    void display() { std::cout << "Generic version"; }
};

template <>
class MyClass<int> {
public:
    void display() { std::cout << "Specialized version for int"; }
};

In this case, MyClass<int> has a specialized display method.

What are variadic templates and when should I use them?

Variadic templates allow you to create templates that accept an arbitrary number of template parameters. They are useful for creating functions or classes that can handle multiple types or a variable number of arguments. For example:

template <typename... Args>
void func(Args... args) {
    // Process args
}

How do I use SFINAE with templates?

SFINAE (Substitution Failure Is Not An Error) allows you to enable or disable template instantiations based on certain conditions. You can use it with std::enable_if to create more flexible templates.