pub fn enter() -> Result<Enter, EnterError>Expand description
Marks the current thread as being within the dynamic extent of an executor.
Executor implementations should call this function before beginning to
execute a task, and drop the returned Enter value after
completing task execution:
use futures::executor::enter;
let enter = enter().expect("...");
/* run task */
drop(enter);Doing so ensures that executors aren’t accidentally invoked in a nested fashion.
§Error
Returns an error if the current thread is already marked, in which case the caller should panic with a tailored error message.