P1662 Adding async RAII support to coroutines

[wg21bot]

P1662R0 Adding async RAII support to coroutines (Lewis Baker)

[jensmaurer]

EWG in Cologne

[jfbastien]

The author tells me they won't bring an update to Prague, because async RAII is hard to retrofit into the current coroutines design. This might require a different approach to coroutines.