What are the new features of constexpr in C++20?

What are the new features of constexpr in C++20?

C++20 enhances constexpr by allowing dynamic memory allocation and more complex control flow in constexpr functions.

Can you give me an example of a constexpr function in C++20?

Sure! Here's a simple example:

constexpr int factorial(int n) {
    return n <= 1 ? 1 : n * factorial(n - 1);
}

How does this improve performance in C++ applications?

By allowing more computations at compile time, constexpr can reduce runtime overhead and improve performance.

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

Yes, while constexpr is more powerful, it still has limitations like not allowing certain types of dynamic allocations.