From 1b6a04ca5504955c571d1c97504fb45ea0befee4 Mon Sep 17 00:00:00 2001
From: Valentin Popov <valentin@popov.link>
Date: Mon, 8 Jan 2024 01:21:28 +0400
Subject: Initial vendor packages
Signed-off-by: Valentin Popov <valentin@popov.link>
---
vendor/rayon/src/iter/flatten_iter.rs | 132 ++++++++++++++++++++++++++++++++++
1 file changed, 132 insertions(+)
create mode 100644 vendor/rayon/src/iter/flatten_iter.rs
(limited to 'vendor/rayon/src/iter/flatten_iter.rs')
diff --git a/vendor/rayon/src/iter/flatten_iter.rs b/vendor/rayon/src/iter/flatten_iter.rs
new file mode 100644
index 0000000..3ce0a3c
--- /dev/null
+++ b/vendor/rayon/src/iter/flatten_iter.rs
@@ -0,0 +1,132 @@
+use super::plumbing::*;
+use super::*;
+
+/// `FlattenIter` turns each element to a serial iterator, then flattens these iterators
+/// together. This struct is created by the [`flatten_iter()`] method on [`ParallelIterator`].
+///
+/// [`flatten_iter()`]: trait.ParallelIterator.html#method.flatten_iter
+/// [`ParallelIterator`]: trait.ParallelIterator.html
+#[must_use = "iterator adaptors are lazy and do nothing unless consumed"]
+#[derive(Debug, Clone)]
+pub struct FlattenIter<I: ParallelIterator> {
+ base: I,
+}
+
+impl<I> FlattenIter<I>
+where
+ I: ParallelIterator,
+ I::Item: IntoIterator,
+ <I::Item as IntoIterator>::Item: Send,
+{
+ /// Creates a new `FlattenIter` iterator.
+ pub(super) fn new(base: I) -> Self {
+ FlattenIter { base }
+ }
+}
+
+impl<I> ParallelIterator for FlattenIter<I>
+where
+ I: ParallelIterator,
+ I::Item: IntoIterator,
+ <I::Item as IntoIterator>::Item: Send,
+{
+ type Item = <I::Item as IntoIterator>::Item;
+
+ fn drive_unindexed<C>(self, consumer: C) -> C::Result
+ where
+ C: UnindexedConsumer<Self::Item>,
+ {
+ let consumer = FlattenIterConsumer::new(consumer);
+ self.base.drive_unindexed(consumer)
+ }
+}
+
+/// ////////////////////////////////////////////////////////////////////////
+/// Consumer implementation
+
+struct FlattenIterConsumer<C> {
+ base: C,
+}
+
+impl<C> FlattenIterConsumer<C> {
+ fn new(base: C) -> Self {
+ FlattenIterConsumer { base }
+ }
+}
+
+impl<T, C> Consumer<T> for FlattenIterConsumer<C>
+where
+ C: UnindexedConsumer<T::Item>,
+ T: IntoIterator,
+{
+ type Folder = FlattenIterFolder<C::Folder>;
+ type Reducer = C::Reducer;
+ type Result = C::Result;
+
+ fn split_at(self, index: usize) -> (Self, Self, C::Reducer) {
+ let (left, right, reducer) = self.base.split_at(index);
+ (
+ FlattenIterConsumer::new(left),
+ FlattenIterConsumer::new(right),
+ reducer,
+ )
+ }
+
+ fn into_folder(self) -> Self::Folder {
+ FlattenIterFolder {
+ base: self.base.into_folder(),
+ }
+ }
+
+ fn full(&self) -> bool {
+ self.base.full()
+ }
+}
+
+impl<T, C> UnindexedConsumer<T> for FlattenIterConsumer<C>
+where
+ C: UnindexedConsumer<T::Item>,
+ T: IntoIterator,
+{
+ fn split_off_left(&self) -> Self {
+ FlattenIterConsumer::new(self.base.split_off_left())
+ }
+
+ fn to_reducer(&self) -> Self::Reducer {
+ self.base.to_reducer()
+ }
+}
+
+struct FlattenIterFolder<C> {
+ base: C,
+}
+
+impl<T, C> Folder<T> for FlattenIterFolder<C>
+where
+ C: Folder<T::Item>,
+ T: IntoIterator,
+{
+ type Result = C::Result;
+
+ fn consume(self, item: T) -> Self {
+ let base = self.base.consume_iter(item);
+ FlattenIterFolder { base }
+ }
+
+ fn consume_iter<I>(self, iter: I) -> Self
+ where
+ I: IntoIterator<Item = T>,
+ {
+ let iter = iter.into_iter().flatten();
+ let base = self.base.consume_iter(iter);
+ FlattenIterFolder { base }
+ }
+
+ fn complete(self) -> Self::Result {
+ self.base.complete()
+ }
+
+ fn full(&self) -> bool {
+ self.base.full()
+ }
+}
--
cgit v1.2.3