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Diffstat (limited to 'vendor/rayon/src/iter/take.rs')
-rw-r--r-- | vendor/rayon/src/iter/take.rs | 86 |
1 files changed, 0 insertions, 86 deletions
diff --git a/vendor/rayon/src/iter/take.rs b/vendor/rayon/src/iter/take.rs deleted file mode 100644 index 52d15d8..0000000 --- a/vendor/rayon/src/iter/take.rs +++ /dev/null @@ -1,86 +0,0 @@ -use super::plumbing::*; -use super::*; -use std::cmp::min; - -/// `Take` is an iterator that iterates over the first `n` elements. -/// This struct is created by the [`take()`] method on [`IndexedParallelIterator`] -/// -/// [`take()`]: trait.IndexedParallelIterator.html#method.take -/// [`IndexedParallelIterator`]: trait.IndexedParallelIterator.html -#[must_use = "iterator adaptors are lazy and do nothing unless consumed"] -#[derive(Debug, Clone)] -pub struct Take<I> { - base: I, - n: usize, -} - -impl<I> Take<I> -where - I: IndexedParallelIterator, -{ - /// Creates a new `Take` iterator. - pub(super) fn new(base: I, n: usize) -> Self { - let n = min(base.len(), n); - Take { base, n } - } -} - -impl<I> ParallelIterator for Take<I> -where - I: IndexedParallelIterator, -{ - type Item = I::Item; - - fn drive_unindexed<C>(self, consumer: C) -> C::Result - where - C: UnindexedConsumer<Self::Item>, - { - bridge(self, consumer) - } - - fn opt_len(&self) -> Option<usize> { - Some(self.len()) - } -} - -impl<I> IndexedParallelIterator for Take<I> -where - I: IndexedParallelIterator, -{ - fn len(&self) -> usize { - self.n - } - - fn drive<C: Consumer<Self::Item>>(self, consumer: C) -> C::Result { - bridge(self, consumer) - } - - fn with_producer<CB>(self, callback: CB) -> CB::Output - where - CB: ProducerCallback<Self::Item>, - { - return self.base.with_producer(Callback { - callback, - n: self.n, - }); - - struct Callback<CB> { - callback: CB, - n: usize, - } - - impl<T, CB> ProducerCallback<T> for Callback<CB> - where - CB: ProducerCallback<T>, - { - type Output = CB::Output; - fn callback<P>(self, base: P) -> CB::Output - where - P: Producer<Item = T>, - { - let (producer, _) = base.split_at(self.n); - self.callback.callback(producer) - } - } - } -} |