orx-concurrent-iter 3.3.0

A thread-safe and ergonomic concurrent iterator trait and efficient lock-free implementations.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53

pub enum ChunkOfEither<P, Q>
where
    P: ExactSizeIterator,
    Q: ExactSizeIterator<Item = P::Item>,
{
    P(P),
    Q(Q),
}

impl<P, Q> Default for ChunkOfEither<P, Q>
where
    P: ExactSizeIterator + Default,
    Q: ExactSizeIterator<Item = P::Item>,
{
    fn default() -> Self {
        Self::P(Default::default())
    }
}

impl<P, Q> Iterator for ChunkOfEither<P, Q>
where
    P: ExactSizeIterator,
    Q: ExactSizeIterator<Item = P::Item>,
{
    type Item = P::Item;

    fn next(&mut self) -> Option<Self::Item> {
        match self {
            Self::P(p) => p.next(),
            Self::Q(q) => q.next(),
        }
    }

    fn size_hint(&self) -> (usize, Option<usize>) {
        match self {
            Self::P(p) => p.size_hint(),
            Self::Q(q) => q.size_hint(),
        }
    }
}

impl<P, Q> ExactSizeIterator for ChunkOfEither<P, Q>
where
    P: ExactSizeIterator,
    Q: ExactSizeIterator<Item = P::Item>,
{
    fn len(&self) -> usize {
        match self {
            Self::P(p) => p.len(),
            Self::Q(q) => q.len(),
        }
    }
}