17 Language support library [language.support]

17.12 Coroutines [support.coroutine]

17.12.4 No-op coroutines [coroutine.noop]

17.12.4.1 Class noop_­coroutine_­promise [coroutine.promise.noop]

struct noop_coroutine_promise {};
The class noop_­coroutine_­promise defines the promise type for the coroutine referred to by noop_­coroutine_­handle ([coroutine.syn]).