coroutines

The article discusses a C++/WinRT pattern for caching the result of a Windows Runtime IAsyncOperation, including handling failures, so that multiple coroutines can share the cached result or exception.

Raymond Chen explains why C++/WinRT does not allow multiple awaits on asynchronous operations like C#, JavaScript, and Python do, citing the lack of a standard library task type and the principle of not paying for unused functionality.

Zig 0.16 ships a new std.Io interface for cross-platform I/O. The library zio provides a full async implementation using stackful coroutines and OS-level async APIs, enabling efficient concurrent tasks without thread-per-task overhead.