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/len.rs | 271 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 271 insertions(+)
 create mode 100644 vendor/rayon/src/iter/len.rs

(limited to 'vendor/rayon/src/iter/len.rs')

diff --git a/vendor/rayon/src/iter/len.rs b/vendor/rayon/src/iter/len.rs
new file mode 100644
index 0000000..8ec7f33
--- /dev/null
+++ b/vendor/rayon/src/iter/len.rs
@@ -0,0 +1,271 @@
+use super::plumbing::*;
+use super::*;
+use std::cmp;
+
+/// `MinLen` is an iterator that imposes a minimum length on iterator splits.
+/// This struct is created by the [`with_min_len()`] method on [`IndexedParallelIterator`]
+///
+/// [`with_min_len()`]: trait.IndexedParallelIterator.html#method.with_min_len
+/// [`IndexedParallelIterator`]: trait.IndexedParallelIterator.html
+#[must_use = "iterator adaptors are lazy and do nothing unless consumed"]
+#[derive(Debug, Clone)]
+pub struct MinLen<I: IndexedParallelIterator> {
+    base: I,
+    min: usize,
+}
+
+impl<I> MinLen<I>
+where
+    I: IndexedParallelIterator,
+{
+    /// Creates a new `MinLen` iterator.
+    pub(super) fn new(base: I, min: usize) -> Self {
+        MinLen { base, min }
+    }
+}
+
+impl<I> ParallelIterator for MinLen<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 MinLen<I>
+where
+    I: IndexedParallelIterator,
+{
+    fn drive<C: Consumer<Self::Item>>(self, consumer: C) -> C::Result {
+        bridge(self, consumer)
+    }
+
+    fn len(&self) -> usize {
+        self.base.len()
+    }
+
+    fn with_producer<CB>(self, callback: CB) -> CB::Output
+    where
+        CB: ProducerCallback<Self::Item>,
+    {
+        return self.base.with_producer(Callback {
+            callback,
+            min: self.min,
+        });
+
+        struct Callback<CB> {
+            callback: CB,
+            min: 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 = MinLenProducer {
+                    base,
+                    min: self.min,
+                };
+                self.callback.callback(producer)
+            }
+        }
+    }
+}
+
+/// ////////////////////////////////////////////////////////////////////////
+/// `MinLenProducer` implementation
+
+struct MinLenProducer<P> {
+    base: P,
+    min: usize,
+}
+
+impl<P> Producer for MinLenProducer<P>
+where
+    P: Producer,
+{
+    type Item = P::Item;
+    type IntoIter = P::IntoIter;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.base.into_iter()
+    }
+
+    fn min_len(&self) -> usize {
+        cmp::max(self.min, self.base.min_len())
+    }
+
+    fn max_len(&self) -> usize {
+        self.base.max_len()
+    }
+
+    fn split_at(self, index: usize) -> (Self, Self) {
+        let (left, right) = self.base.split_at(index);
+        (
+            MinLenProducer {
+                base: left,
+                min: self.min,
+            },
+            MinLenProducer {
+                base: right,
+                min: self.min,
+            },
+        )
+    }
+
+    fn fold_with<F>(self, folder: F) -> F
+    where
+        F: Folder<Self::Item>,
+    {
+        self.base.fold_with(folder)
+    }
+}
+
+/// `MaxLen` is an iterator that imposes a maximum length on iterator splits.
+/// This struct is created by the [`with_max_len()`] method on [`IndexedParallelIterator`]
+///
+/// [`with_max_len()`]: trait.IndexedParallelIterator.html#method.with_max_len
+/// [`IndexedParallelIterator`]: trait.IndexedParallelIterator.html
+#[must_use = "iterator adaptors are lazy and do nothing unless consumed"]
+#[derive(Debug, Clone)]
+pub struct MaxLen<I: IndexedParallelIterator> {
+    base: I,
+    max: usize,
+}
+
+impl<I> MaxLen<I>
+where
+    I: IndexedParallelIterator,
+{
+    /// Creates a new `MaxLen` iterator.
+    pub(super) fn new(base: I, max: usize) -> Self {
+        MaxLen { base, max }
+    }
+}
+
+impl<I> ParallelIterator for MaxLen<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 MaxLen<I>
+where
+    I: IndexedParallelIterator,
+{
+    fn drive<C: Consumer<Self::Item>>(self, consumer: C) -> C::Result {
+        bridge(self, consumer)
+    }
+
+    fn len(&self) -> usize {
+        self.base.len()
+    }
+
+    fn with_producer<CB>(self, callback: CB) -> CB::Output
+    where
+        CB: ProducerCallback<Self::Item>,
+    {
+        return self.base.with_producer(Callback {
+            callback,
+            max: self.max,
+        });
+
+        struct Callback<CB> {
+            callback: CB,
+            max: 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 = MaxLenProducer {
+                    base,
+                    max: self.max,
+                };
+                self.callback.callback(producer)
+            }
+        }
+    }
+}
+
+/// ////////////////////////////////////////////////////////////////////////
+/// `MaxLenProducer` implementation
+
+struct MaxLenProducer<P> {
+    base: P,
+    max: usize,
+}
+
+impl<P> Producer for MaxLenProducer<P>
+where
+    P: Producer,
+{
+    type Item = P::Item;
+    type IntoIter = P::IntoIter;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.base.into_iter()
+    }
+
+    fn min_len(&self) -> usize {
+        self.base.min_len()
+    }
+
+    fn max_len(&self) -> usize {
+        cmp::min(self.max, self.base.max_len())
+    }
+
+    fn split_at(self, index: usize) -> (Self, Self) {
+        let (left, right) = self.base.split_at(index);
+        (
+            MaxLenProducer {
+                base: left,
+                max: self.max,
+            },
+            MaxLenProducer {
+                base: right,
+                max: self.max,
+            },
+        )
+    }
+
+    fn fold_with<F>(self, folder: F) -> F
+    where
+        F: Folder<Self::Item>,
+    {
+        self.base.fold_with(folder)
+    }
+}
-- 
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