What are some advanced examples of constexpr in C++14?

Can you explain some advanced examples of constexpr in C++14?

Sure! In C++14, constexpr functions can have more complex logic, including loops and conditionals. For example, you can create a constexpr function that calculates Fibonacci numbers.

Can you show me the Fibonacci example?

Absolutely! Here's a simple constexpr Fibonacci function:

constexpr int fibonacci(int n) {
    return (n <= 1) ? n : fibonacci(n - 1) + fibonacci(n - 2);
}

This function can be evaluated at compile time.

What are the benefits of using constexpr?

Using constexpr allows for computations at compile time, which can lead to faster runtime performance and reduced memory usage.

Are there any limitations to constexpr in C++14?

Yes, while C++14 allows more complex expressions, there are still limitations, such as not being able to use dynamic memory allocation within constexpr functions.