What are the benefits of using constexpr in C++20?

What are the benefits of using constexpr in C++20?

Using constexpr in C++20 allows for more compile-time computations, leading to faster runtime performance and reduced overhead.

Can you give me an example of how constexpr can optimize a function?

Sure! For instance, a constexpr function can compute Fibonacci numbers at compile time, eliminating the need for runtime calculations.

Are there any limitations to using constexpr in C++20?

Yes, constexpr functions must adhere to certain rules, like only using a limited set of operations and types that are also constexpr.

How does constexpr differ from const in C++?

While const defines a constant value, constexpr allows for compile-time evaluation, enabling more complex computations.

What are some best practices for using constexpr in my code?

Best practices include keeping constexpr functions simple, using them for small computations, and ensuring they are well-documented.