How do I iterate safely and efficiently with std::span?

In C++, std::span provides a way to safely and efficiently iterate over contiguous sequences such as arrays or vectors without the overhead of copying or managing memory. It allows for easy access to the data without risking out-of-bounds errors.

Below is an example of how to use std::span in a C++ program:


        #include 
        #include 
        #include 

        void printSpan(std::span numbers) {
            for (auto number : numbers) {
                std::cout << number << " ";
            }
            std::cout << std::endl;
        }

        int main() {
            std::vector vec = {1, 2, 3, 4, 5};
            std::span span = vec; // Create a span from the vector
            
            printSpan(span); // Safe iteration using std::span

            return 0;
        }