diff options
Diffstat (limited to 'vendor/rayon/src/iter/map.rs')
| -rw-r--r-- | vendor/rayon/src/iter/map.rs | 259 |
1 files changed, 0 insertions, 259 deletions
diff --git a/vendor/rayon/src/iter/map.rs b/vendor/rayon/src/iter/map.rs deleted file mode 100644 index da14d40..0000000 --- a/vendor/rayon/src/iter/map.rs +++ /dev/null @@ -1,259 +0,0 @@ -use super::plumbing::*; -use super::*; - -use std::fmt::{self, Debug}; -use std::iter; - -/// `Map` is an iterator that transforms the elements of an underlying iterator. -/// -/// This struct is created by the [`map()`] method on [`ParallelIterator`] -/// -/// [`map()`]: trait.ParallelIterator.html#method.map -/// [`ParallelIterator`]: trait.ParallelIterator.html -#[must_use = "iterator adaptors are lazy and do nothing unless consumed"] -#[derive(Clone)] -pub struct Map<I: ParallelIterator, F> { - base: I, - map_op: F, -} - -impl<I: ParallelIterator + Debug, F> Debug for Map<I, F> { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.debug_struct("Map").field("base", &self.base).finish() - } -} - -impl<I, F> Map<I, F> -where - I: ParallelIterator, -{ - /// Creates a new `Map` iterator. - pub(super) fn new(base: I, map_op: F) -> Self { - Map { base, map_op } - } -} - -impl<I, F, R> ParallelIterator for Map<I, F> -where - I: ParallelIterator, - F: Fn(I::Item) -> R + Sync + Send, - R: Send, -{ - type Item = F::Output; - - fn drive_unindexed<C>(self, consumer: C) -> C::Result - where - C: UnindexedConsumer<Self::Item>, - { - let consumer1 = MapConsumer::new(consumer, &self.map_op); - self.base.drive_unindexed(consumer1) - } - - fn opt_len(&self) -> Option<usize> { - self.base.opt_len() - } -} - -impl<I, F, R> IndexedParallelIterator for Map<I, F> -where - I: IndexedParallelIterator, - F: Fn(I::Item) -> R + Sync + Send, - R: Send, -{ - fn drive<C>(self, consumer: C) -> C::Result - where - C: Consumer<Self::Item>, - { - let consumer1 = MapConsumer::new(consumer, &self.map_op); - self.base.drive(consumer1) - } - - 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, - map_op: self.map_op, - }); - - struct Callback<CB, F> { - callback: CB, - map_op: F, - } - - impl<T, F, R, CB> ProducerCallback<T> for Callback<CB, F> - where - CB: ProducerCallback<R>, - F: Fn(T) -> R + Sync, - R: Send, - { - type Output = CB::Output; - - fn callback<P>(self, base: P) -> CB::Output - where - P: Producer<Item = T>, - { - let producer = MapProducer { - base, - map_op: &self.map_op, - }; - self.callback.callback(producer) - } - } - } -} - -/// //////////////////////////////////////////////////////////////////////// - -struct MapProducer<'f, P, F> { - base: P, - map_op: &'f F, -} - -impl<'f, P, F, R> Producer for MapProducer<'f, P, F> -where - P: Producer, - F: Fn(P::Item) -> R + Sync, - R: Send, -{ - type Item = F::Output; - type IntoIter = iter::Map<P::IntoIter, &'f F>; - - fn into_iter(self) -> Self::IntoIter { - self.base.into_iter().map(self.map_op) - } - - fn min_len(&self) -> usize { - 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); - ( - MapProducer { - base: left, - map_op: self.map_op, - }, - MapProducer { - base: right, - map_op: self.map_op, - }, - ) - } - - fn fold_with<G>(self, folder: G) -> G - where - G: Folder<Self::Item>, - { - let folder1 = MapFolder { - base: folder, - map_op: self.map_op, - }; - self.base.fold_with(folder1).base - } -} - -/// //////////////////////////////////////////////////////////////////////// -/// Consumer implementation - -struct MapConsumer<'f, C, F> { - base: C, - map_op: &'f F, -} - -impl<'f, C, F> MapConsumer<'f, C, F> { - fn new(base: C, map_op: &'f F) -> Self { - MapConsumer { base, map_op } - } -} - -impl<'f, T, R, C, F> Consumer<T> for MapConsumer<'f, C, F> -where - C: Consumer<F::Output>, - F: Fn(T) -> R + Sync, - R: Send, -{ - type Folder = MapFolder<'f, C::Folder, F>; - type Reducer = C::Reducer; - type Result = C::Result; - - fn split_at(self, index: usize) -> (Self, Self, Self::Reducer) { - let (left, right, reducer) = self.base.split_at(index); - ( - MapConsumer::new(left, self.map_op), - MapConsumer::new(right, self.map_op), - reducer, - ) - } - - fn into_folder(self) -> Self::Folder { - MapFolder { - base: self.base.into_folder(), - map_op: self.map_op, - } - } - - fn full(&self) -> bool { - self.base.full() - } -} - -impl<'f, T, R, C, F> UnindexedConsumer<T> for MapConsumer<'f, C, F> -where - C: UnindexedConsumer<F::Output>, - F: Fn(T) -> R + Sync, - R: Send, -{ - fn split_off_left(&self) -> Self { - MapConsumer::new(self.base.split_off_left(), self.map_op) - } - - fn to_reducer(&self) -> Self::Reducer { - self.base.to_reducer() - } -} - -struct MapFolder<'f, C, F> { - base: C, - map_op: &'f F, -} - -impl<'f, T, R, C, F> Folder<T> for MapFolder<'f, C, F> -where - C: Folder<F::Output>, - F: Fn(T) -> R, -{ - type Result = C::Result; - - fn consume(self, item: T) -> Self { - let mapped_item = (self.map_op)(item); - MapFolder { - base: self.base.consume(mapped_item), - map_op: self.map_op, - } - } - - fn consume_iter<I>(mut self, iter: I) -> Self - where - I: IntoIterator<Item = T>, - { - self.base = self.base.consume_iter(iter.into_iter().map(self.map_op)); - self - } - - fn complete(self) -> C::Result { - self.base.complete() - } - - fn full(&self) -> bool { - self.base.full() - } -} |