C++ has always supported callbacks and has libraries for promises [1] and event loops [2]. Co-routines (i.e., await) are coming soon. [1]: https://msdn.microso

C++ has always supported callbacks and has libraries for promises [1] and event loops [2]. Co-routines (i.e., await) are coming soon. [1]: https://msdn.microsoft.com/en-us/library/dd492427.aspx https://msdn.microsoft.com/en-us/library/dd492427.aspx [2]: https://github.com/libuv/libuv https://github.com/libuv/libuv