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authorValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
committerValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
commita990de90fe41456a23e58bd087d2f107d321f3a1 (patch)
tree15afc392522a9e85dc3332235e311b7d39352ea9 /vendor/rayon/src/iter/chain.rs
parent3d48cd3f81164bbfc1a755dc1d4a9a02f98c8ddd (diff)
downloadfparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.tar.xz
fparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.zip
Deleted vendor folder
Diffstat (limited to 'vendor/rayon/src/iter/chain.rs')
-rw-r--r--vendor/rayon/src/iter/chain.rs268
1 files changed, 0 insertions, 268 deletions
diff --git a/vendor/rayon/src/iter/chain.rs b/vendor/rayon/src/iter/chain.rs
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@@ -1,268 +0,0 @@
-use super::plumbing::*;
-use super::*;
-use rayon_core::join;
-use std::cmp;
-use std::iter;
-
-/// `Chain` is an iterator that joins `b` after `a` in one continuous iterator.
-/// This struct is created by the [`chain()`] method on [`ParallelIterator`]
-///
-/// [`chain()`]: trait.ParallelIterator.html#method.chain
-/// [`ParallelIterator`]: trait.ParallelIterator.html
-#[must_use = "iterator adaptors are lazy and do nothing unless consumed"]
-#[derive(Debug, Clone)]
-pub struct Chain<A, B>
-where
- A: ParallelIterator,
- B: ParallelIterator<Item = A::Item>,
-{
- a: A,
- b: B,
-}
-
-impl<A, B> Chain<A, B>
-where
- A: ParallelIterator,
- B: ParallelIterator<Item = A::Item>,
-{
- /// Creates a new `Chain` iterator.
- pub(super) fn new(a: A, b: B) -> Self {
- Chain { a, b }
- }
-}
-
-impl<A, B> ParallelIterator for Chain<A, B>
-where
- A: ParallelIterator,
- B: ParallelIterator<Item = A::Item>,
-{
- type Item = A::Item;
-
- fn drive_unindexed<C>(self, consumer: C) -> C::Result
- where
- C: UnindexedConsumer<Self::Item>,
- {
- let Chain { a, b } = self;
-
- // If we returned a value from our own `opt_len`, then the collect consumer in particular
- // will balk at being treated like an actual `UnindexedConsumer`. But when we do know the
- // length, we can use `Consumer::split_at` instead, and this is still harmless for other
- // truly-unindexed consumers too.
- let (left, right, reducer) = if let Some(len) = a.opt_len() {
- consumer.split_at(len)
- } else {
- let reducer = consumer.to_reducer();
- (consumer.split_off_left(), consumer, reducer)
- };
-
- let (a, b) = join(|| a.drive_unindexed(left), || b.drive_unindexed(right));
- reducer.reduce(a, b)
- }
-
- fn opt_len(&self) -> Option<usize> {
- self.a.opt_len()?.checked_add(self.b.opt_len()?)
- }
-}
-
-impl<A, B> IndexedParallelIterator for Chain<A, B>
-where
- A: IndexedParallelIterator,
- B: IndexedParallelIterator<Item = A::Item>,
-{
- fn drive<C>(self, consumer: C) -> C::Result
- where
- C: Consumer<Self::Item>,
- {
- let Chain { a, b } = self;
- let (left, right, reducer) = consumer.split_at(a.len());
- let (a, b) = join(|| a.drive(left), || b.drive(right));
- reducer.reduce(a, b)
- }
-
- fn len(&self) -> usize {
- self.a.len().checked_add(self.b.len()).expect("overflow")
- }
-
- fn with_producer<CB>(self, callback: CB) -> CB::Output
- where
- CB: ProducerCallback<Self::Item>,
- {
- let a_len = self.a.len();
- return self.a.with_producer(CallbackA {
- callback,
- a_len,
- b: self.b,
- });
-
- struct CallbackA<CB, B> {
- callback: CB,
- a_len: usize,
- b: B,
- }
-
- impl<CB, B> ProducerCallback<B::Item> for CallbackA<CB, B>
- where
- B: IndexedParallelIterator,
- CB: ProducerCallback<B::Item>,
- {
- type Output = CB::Output;
-
- fn callback<A>(self, a_producer: A) -> Self::Output
- where
- A: Producer<Item = B::Item>,
- {
- self.b.with_producer(CallbackB {
- callback: self.callback,
- a_len: self.a_len,
- a_producer,
- })
- }
- }
-
- struct CallbackB<CB, A> {
- callback: CB,
- a_len: usize,
- a_producer: A,
- }
-
- impl<CB, A> ProducerCallback<A::Item> for CallbackB<CB, A>
- where
- A: Producer,
- CB: ProducerCallback<A::Item>,
- {
- type Output = CB::Output;
-
- fn callback<B>(self, b_producer: B) -> Self::Output
- where
- B: Producer<Item = A::Item>,
- {
- let producer = ChainProducer::new(self.a_len, self.a_producer, b_producer);
- self.callback.callback(producer)
- }
- }
- }
-}
-
-/// ////////////////////////////////////////////////////////////////////////
-
-struct ChainProducer<A, B>
-where
- A: Producer,
- B: Producer<Item = A::Item>,
-{
- a_len: usize,
- a: A,
- b: B,
-}
-
-impl<A, B> ChainProducer<A, B>
-where
- A: Producer,
- B: Producer<Item = A::Item>,
-{
- fn new(a_len: usize, a: A, b: B) -> Self {
- ChainProducer { a_len, a, b }
- }
-}
-
-impl<A, B> Producer for ChainProducer<A, B>
-where
- A: Producer,
- B: Producer<Item = A::Item>,
-{
- type Item = A::Item;
- type IntoIter = ChainSeq<A::IntoIter, B::IntoIter>;
-
- fn into_iter(self) -> Self::IntoIter {
- ChainSeq::new(self.a.into_iter(), self.b.into_iter())
- }
-
- fn min_len(&self) -> usize {
- cmp::max(self.a.min_len(), self.b.min_len())
- }
-
- fn max_len(&self) -> usize {
- cmp::min(self.a.max_len(), self.b.max_len())
- }
-
- fn split_at(self, index: usize) -> (Self, Self) {
- if index <= self.a_len {
- let a_rem = self.a_len - index;
- let (a_left, a_right) = self.a.split_at(index);
- let (b_left, b_right) = self.b.split_at(0);
- (
- ChainProducer::new(index, a_left, b_left),
- ChainProducer::new(a_rem, a_right, b_right),
- )
- } else {
- let (a_left, a_right) = self.a.split_at(self.a_len);
- let (b_left, b_right) = self.b.split_at(index - self.a_len);
- (
- ChainProducer::new(self.a_len, a_left, b_left),
- ChainProducer::new(0, a_right, b_right),
- )
- }
- }
-
- fn fold_with<F>(self, mut folder: F) -> F
- where
- F: Folder<A::Item>,
- {
- folder = self.a.fold_with(folder);
- if folder.full() {
- folder
- } else {
- self.b.fold_with(folder)
- }
- }
-}
-
-/// ////////////////////////////////////////////////////////////////////////
-/// Wrapper for Chain to implement ExactSizeIterator
-
-struct ChainSeq<A, B> {
- chain: iter::Chain<A, B>,
-}
-
-impl<A, B> ChainSeq<A, B> {
- fn new(a: A, b: B) -> ChainSeq<A, B>
- where
- A: ExactSizeIterator,
- B: ExactSizeIterator<Item = A::Item>,
- {
- ChainSeq { chain: a.chain(b) }
- }
-}
-
-impl<A, B> Iterator for ChainSeq<A, B>
-where
- A: Iterator,
- B: Iterator<Item = A::Item>,
-{
- type Item = A::Item;
-
- fn next(&mut self) -> Option<Self::Item> {
- self.chain.next()
- }
-
- fn size_hint(&self) -> (usize, Option<usize>) {
- self.chain.size_hint()
- }
-}
-
-impl<A, B> ExactSizeIterator for ChainSeq<A, B>
-where
- A: ExactSizeIterator,
- B: ExactSizeIterator<Item = A::Item>,
-{
-}
-
-impl<A, B> DoubleEndedIterator for ChainSeq<A, B>
-where
- A: DoubleEndedIterator,
- B: DoubleEndedIterator<Item = A::Item>,
-{
- fn next_back(&mut self) -> Option<Self::Item> {
- self.chain.next_back()
- }
-}