std::expected is a powerful feature introduced in C++23 that offers a modern, type-safe alternative to traditional error-handling methods.  std::expected allows developers to represent a value or an error in a single object, simplifying the handling of success and failure scenarios in a clean and readable way.

The Definitive Guide to std::expected in C++

John Farrier

From the article:

std::expected is an addition to the C++ standard library that provides a way to return and propagate errors without using exceptions. It represents a value or an error and is similar to the Result type in Rust. This guide covers its use, benefits, and comparison with other error handling techniques, helping developers to write more robust and readable code.