How do I use expected in C++23?

In C++23, the std::expected type is introduced to handle the outcomes of functions that can either succeed with a value or fail with an error, enhancing error handling in C++. It provides a way to represent the success or failure state of a computation without using exceptions.

Here's a simple example demonstrating how to use std::expected in C++23:

#include #include std::expected divide(int a, int b) { if (b == 0) { return std::unexpected("Division by zero error!"); } return a / b; } int main() { auto result = divide(10, 0); if (!result) { std::cout << "Error: " << result.error() << std::endl; } else { std::cout << "Result: " << result.value() << std::endl; } return 0; }

C++23 expected type error handling std::expected programming features coding C++ error handling

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