FoundationDB's Flow – Bringing Actor-Based Concurrency to C++11
Summary
FoundationDB's Flow introduces an actor-based concurrency model for C++11, implemented as a compiler that rewrites asynchronous actor functions into non-blocking, callback-based code while compiling down to standard C++. The article details the Flow feature set (Promise, Future, ACTOR, wait, state, PromiseStream/FutureStream, waitNext, and choose/when), its engineering motivation, and caveats around Flow-specific preprocessing and IDE considerations.