another_rxrust/operators/
last.rs

1use crate::internals::stream_controller::*;
2use crate::prelude::*;
3
4#[derive(Clone)]
5pub struct Last<Item>
6where
7  Item: Clone + Send + Sync,
8{
9  take_last_op: operators::TakeLast<Item>,
10}
11
12impl<'a, Item> Last<Item>
13where
14  Item: Clone + Send + Sync,
15{
16  pub fn new() -> Last<Item> {
17    Last {
18      take_last_op: operators::TakeLast::new(1),
19    }
20  }
21  pub fn execute(&self, source: Observable<'a, Item>) -> Observable<'a, Item> {
22    let take_last_op = self.take_last_op.clone();
23
24    Observable::<Item>::create(move |s| {
25      let source = source.clone();
26
27      let sctl = StreamController::new(s);
28      let sctl_next = sctl.clone();
29      let sctl_error = sctl.clone();
30      let sctl_complete = sctl.clone();
31
32      take_last_op
33        .execute(source)
34        .inner_subscribe(sctl.new_observer(
35          move |_, x| {
36            sctl_next.sink_next(x);
37          },
38          move |_, e| {
39            sctl_error.sink_error(e);
40          },
41          move |serial| sctl_complete.sink_complete(&serial),
42        ));
43    })
44  }
45}
46
47impl<'a, Item> Observable<'a, Item>
48where
49  Item: Clone + Send + Sync,
50{
51  pub fn last(&self) -> Observable<'a, Item> {
52    Last::new().execute(self.clone())
53  }
54}
55
56#[cfg(test)]
57mod test {
58  use crate::prelude::*;
59
60  #[test]
61  fn basic() {
62    observables::from_iter(0..10).last().subscribe(
63      print_next_fmt!("{}"),
64      print_error!(),
65      print_complete!(),
66    );
67  }
68}
another_rxrust/operators/last.rs

another_rxrust/operators/
last.rs
