How do I compute hashes or tables at compile time?

In C++, computing hashes or tables at compile time can significantly enhance performance, especially in scenarios involving constant data. Utilizing features such as `constexpr` and template metaprogramming allows you to achieve this. Below, we explore an example of computing a simple hash function at compile time.


            // Compile-time hash function in C++
            constexpr unsigned int hash(const char* str, unsigned int h = 0) {
                return *str ? hash(str + 1, (h * 31) + *str) : h;
            }

            constexpr unsigned int myHash = hash("example");
            // myHash will be computed at compile-time