On 7/7/23 09:05, 1one1 via Std-Proposals wrote:

> We propose `std::fiber<T>`, as a lightweight unit of execution with its
> own private data `T`. Each fiber would employ RCU or COW semantics when
> sharing data with other fibers, minimizing data races while optimizing
> memory usage and execution speed.

Have a look at https://wg21.link/P0876