rayon/
par_either.rs

1use crate::iter::plumbing::*;
2use crate::iter::Either::{Left, Right};
3use crate::iter::*;
4
5/// `Either<L, R>` is a parallel iterator if both `L` and `R` are parallel iterators.
6impl<L, R> ParallelIterator for Either<L, R>
7where
8    L: ParallelIterator,
9    R: ParallelIterator<Item = L::Item>,
10{
11    type Item = L::Item;
12
13    fn drive_unindexed<C>(self, consumer: C) -> C::Result
14    where
15        C: UnindexedConsumer<Self::Item>,
16    {
17        match self {
18            Left(iter) => iter.drive_unindexed(consumer),
19            Right(iter) => iter.drive_unindexed(consumer),
20        }
21    }
22
23    fn opt_len(&self) -> Option<usize> {
24        self.as_ref().either(L::opt_len, R::opt_len)
25    }
26}
27
28impl<L, R> IndexedParallelIterator for Either<L, R>
29where
30    L: IndexedParallelIterator,
31    R: IndexedParallelIterator<Item = L::Item>,
32{
33    fn drive<C>(self, consumer: C) -> C::Result
34    where
35        C: Consumer<Self::Item>,
36    {
37        match self {
38            Left(iter) => iter.drive(consumer),
39            Right(iter) => iter.drive(consumer),
40        }
41    }
42
43    fn len(&self) -> usize {
44        self.as_ref().either(L::len, R::len)
45    }
46
47    fn with_producer<CB>(self, callback: CB) -> CB::Output
48    where
49        CB: ProducerCallback<Self::Item>,
50    {
51        match self {
52            Left(iter) => iter.with_producer(callback),
53            Right(iter) => iter.with_producer(callback),
54        }
55    }
56}
57
58/// `Either<L, R>` can be extended if both `L` and `R` are parallel extendable.
59impl<L, R, T> ParallelExtend<T> for Either<L, R>
60where
61    L: ParallelExtend<T>,
62    R: ParallelExtend<T>,
63    T: Send,
64{
65    fn par_extend<I>(&mut self, par_iter: I)
66    where
67        I: IntoParallelIterator<Item = T>,
68    {
69        match self.as_mut() {
70            Left(collection) => collection.par_extend(par_iter),
71            Right(collection) => collection.par_extend(par_iter),
72        }
73    }
74}
rayon/par_either.rs

rayon/
par_either.rs
