What are the best practices for using C++20 concepts?

What are the best practices for using C++20 concepts?

C++20 concepts help improve code readability and correctness. Best practices include defining clear concepts, using them to constrain templates, and leveraging them to simplify code.

Can you give an example of a concept in C++20?

Sure! A simple example is the 'Integral' concept, which checks if a type is an integral type. You can define it like this: template<typename T> concept Integral = std::is_integral_v<T>;.

How do concepts improve template programming?

Concepts provide a way to specify requirements for template parameters, making error messages clearer and reducing the need for SFINAE (Substitution Failure Is Not An Error). This leads to more maintainable and understandable code.

Are there any performance implications of using concepts?

Generally, concepts do not have a performance overhead. They are checked at compile-time, which can lead to more optimized code by enabling better specialization.