What are some examples of template metaprogramming?

What are some examples of template metaprogramming?

Template metaprogramming is a programming technique that uses templates to generate code at compile time. A common example is using C++ templates to create generic data structures like linked lists or trees.

Can you give me a specific C++ example?

Sure! Here's a simple example of a template for a stack data structure in C++:

template <typename T>
class Stack {
private:
    std::vector<T> elements;
public:
    void push(const T& element) { elements.push_back(element); }
    void pop() { elements.pop_back(); }
    T top() const { return elements.back(); }
    bool isEmpty() const { return elements.empty(); }
};

What are the benefits of using template metaprogramming?

The benefits include code reusability, type safety, and the ability to write more generic and flexible code. It can also lead to performance improvements since code is generated at compile time.

Are there any downsides to template metaprogramming?

Yes, some downsides include increased compilation times, more complex error messages, and potentially harder-to-read code. It can also lead to code bloat if not managed properly.