Method push

user/src/bin/stackless_coroutine.rs:66–75

(&mut self, closure: C)

    }

    fn push<C, F>(&mut self, closure: C)
    where
        F: Future<Output = ()> + 'static,
        C: FnOnce(Task) -> F,
    {
        let task = Task {
            state: State::Running,
        };
        self.tasks.push_back(Box::pin(closure(task)));
    }

    fn run(&mut self) {
        let waker = create_waker();