Flow adds actor‑based concurrency to C++11 for FoundationDB developers

Flow is an open‑source library that implements actor‑based concurrency for C++11. It originates from the FoundationDB project and is hosted on the Apple GitHub organization. The library enables developers to write asynchronous code using lightweight actors. Flow abstracts away thread management while preserving C++11 language features. It provides a message‑passing model where actors exchange data through futures. The design aims to simplify complex distributed systems programming. Documentation and examples are available on the project's website. Users can integrate Flow into existing C++11 codebases to experiment with the actor model.