What are C++ templates and concepts?

Can you explain what C++ templates are?

C++ templates are a powerful feature that allows you to write generic and reusable code. They enable functions and classes to operate with any data type.

What are concepts in C++?

Concepts in C++ are a way to specify constraints on template parameters, ensuring that they meet certain criteria before being used.

How do templates and concepts work together?

Templates can be constrained using concepts, which helps in providing clearer error messages and better code readability.

Can you give me an example of a template using concepts?

Sure! Here's a simple example:

template<typename T>
concept Addable = requires(T a, T b) { a + b; };

template<Addable T>
T add(T a, T b) {
    return a + b;
}