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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/option.rs
parent3d48cd3f81164bbfc1a755dc1d4a9a02f98c8ddd (diff)
downloadfparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.tar.xz
fparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.zip
Deleted vendor folder
Diffstat (limited to 'vendor/rayon/src/option.rs')
-rw-r--r--vendor/rayon/src/option.rs203
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diff --git a/vendor/rayon/src/option.rs b/vendor/rayon/src/option.rs
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-//! Parallel iterator types for [options][std::option]
-//!
-//! You will rarely need to interact with this module directly unless you need
-//! to name one of the iterator types.
-//!
-//! [std::option]: https://doc.rust-lang.org/stable/std/option/
-
-use crate::iter::plumbing::*;
-use crate::iter::*;
-use std::sync::atomic::{AtomicBool, Ordering};
-
-/// A parallel iterator over the value in [`Some`] variant of an [`Option`].
-///
-/// The iterator yields one value if the [`Option`] is a [`Some`], otherwise none.
-///
-/// This `struct` is created by the [`into_par_iter`] function.
-///
-/// [`Option`]: https://doc.rust-lang.org/std/option/enum.Option.html
-/// [`Some`]: https://doc.rust-lang.org/std/option/enum.Option.html#variant.Some
-/// [`into_par_iter`]: ../iter/trait.IntoParallelIterator.html#tymethod.into_par_iter
-#[derive(Debug, Clone)]
-pub struct IntoIter<T: Send> {
- opt: Option<T>,
-}
-
-impl<T: Send> IntoParallelIterator for Option<T> {
- type Item = T;
- type Iter = IntoIter<T>;
-
- fn into_par_iter(self) -> Self::Iter {
- IntoIter { opt: self }
- }
-}
-
-impl<T: Send> ParallelIterator for IntoIter<T> {
- type Item = T;
-
- fn drive_unindexed<C>(self, consumer: C) -> C::Result
- where
- C: UnindexedConsumer<Self::Item>,
- {
- self.drive(consumer)
- }
-
- fn opt_len(&self) -> Option<usize> {
- Some(self.len())
- }
-}
-
-impl<T: Send> IndexedParallelIterator for IntoIter<T> {
- fn drive<C>(self, consumer: C) -> C::Result
- where
- C: Consumer<Self::Item>,
- {
- let mut folder = consumer.into_folder();
- if let Some(item) = self.opt {
- folder = folder.consume(item);
- }
- folder.complete()
- }
-
- fn len(&self) -> usize {
- match self.opt {
- Some(_) => 1,
- None => 0,
- }
- }
-
- fn with_producer<CB>(self, callback: CB) -> CB::Output
- where
- CB: ProducerCallback<Self::Item>,
- {
- callback.callback(OptionProducer { opt: self.opt })
- }
-}
-
-/// A parallel iterator over a reference to the [`Some`] variant of an [`Option`].
-///
-/// The iterator yields one value if the [`Option`] is a [`Some`], otherwise none.
-///
-/// This `struct` is created by the [`par_iter`] function.
-///
-/// [`Option`]: https://doc.rust-lang.org/std/option/enum.Option.html
-/// [`Some`]: https://doc.rust-lang.org/std/option/enum.Option.html#variant.Some
-/// [`par_iter`]: ../iter/trait.IntoParallelRefIterator.html#tymethod.par_iter
-#[derive(Debug)]
-pub struct Iter<'a, T: Sync> {
- inner: IntoIter<&'a T>,
-}
-
-impl<'a, T: Sync> Clone for Iter<'a, T> {
- fn clone(&self) -> Self {
- Iter {
- inner: self.inner.clone(),
- }
- }
-}
-
-impl<'a, T: Sync> IntoParallelIterator for &'a Option<T> {
- type Item = &'a T;
- type Iter = Iter<'a, T>;
-
- fn into_par_iter(self) -> Self::Iter {
- Iter {
- inner: self.as_ref().into_par_iter(),
- }
- }
-}
-
-delegate_indexed_iterator! {
- Iter<'a, T> => &'a T,
- impl<'a, T: Sync + 'a>
-}
-
-/// A parallel iterator over a mutable reference to the [`Some`] variant of an [`Option`].
-///
-/// The iterator yields one value if the [`Option`] is a [`Some`], otherwise none.
-///
-/// This `struct` is created by the [`par_iter_mut`] function.
-///
-/// [`Option`]: https://doc.rust-lang.org/std/option/enum.Option.html
-/// [`Some`]: https://doc.rust-lang.org/std/option/enum.Option.html#variant.Some
-/// [`par_iter_mut`]: ../iter/trait.IntoParallelRefMutIterator.html#tymethod.par_iter_mut
-#[derive(Debug)]
-pub struct IterMut<'a, T: Send> {
- inner: IntoIter<&'a mut T>,
-}
-
-impl<'a, T: Send> IntoParallelIterator for &'a mut Option<T> {
- type Item = &'a mut T;
- type Iter = IterMut<'a, T>;
-
- fn into_par_iter(self) -> Self::Iter {
- IterMut {
- inner: self.as_mut().into_par_iter(),
- }
- }
-}
-
-delegate_indexed_iterator! {
- IterMut<'a, T> => &'a mut T,
- impl<'a, T: Send + 'a>
-}
-
-/// Private producer for an option
-struct OptionProducer<T: Send> {
- opt: Option<T>,
-}
-
-impl<T: Send> Producer for OptionProducer<T> {
- type Item = T;
- type IntoIter = std::option::IntoIter<T>;
-
- fn into_iter(self) -> Self::IntoIter {
- self.opt.into_iter()
- }
-
- fn split_at(self, index: usize) -> (Self, Self) {
- debug_assert!(index <= 1);
- let none = OptionProducer { opt: None };
- if index == 0 {
- (none, self)
- } else {
- (self, none)
- }
- }
-}
-
-/// Collect an arbitrary `Option`-wrapped collection.
-///
-/// If any item is `None`, then all previous items collected are discarded,
-/// and it returns only `None`.
-impl<C, T> FromParallelIterator<Option<T>> for Option<C>
-where
- C: FromParallelIterator<T>,
- T: Send,
-{
- fn from_par_iter<I>(par_iter: I) -> Self
- where
- I: IntoParallelIterator<Item = Option<T>>,
- {
- fn check<T>(found_none: &AtomicBool) -> impl Fn(&Option<T>) + '_ {
- move |item| {
- if item.is_none() {
- found_none.store(true, Ordering::Relaxed);
- }
- }
- }
-
- let found_none = AtomicBool::new(false);
- let collection = par_iter
- .into_par_iter()
- .inspect(check(&found_none))
- .while_some()
- .collect();
-
- if found_none.load(Ordering::Relaxed) {
- None
- } else {
- Some(collection)
- }
- }
-}