diff options
Diffstat (limited to 'vendor/rayon/src/iter/flat_map_iter.rs')
-rw-r--r-- | vendor/rayon/src/iter/flat_map_iter.rs | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/vendor/rayon/src/iter/flat_map_iter.rs b/vendor/rayon/src/iter/flat_map_iter.rs deleted file mode 100644 index c76cf68..0000000 --- a/vendor/rayon/src/iter/flat_map_iter.rs +++ /dev/null @@ -1,147 +0,0 @@ -use super::plumbing::*; -use super::*; - -use std::fmt::{self, Debug}; - -/// `FlatMapIter` maps each element to a serial iterator, then flattens these iterators together. -/// This struct is created by the [`flat_map_iter()`] method on [`ParallelIterator`] -/// -/// [`flat_map_iter()`]: trait.ParallelIterator.html#method.flat_map_iter -/// [`ParallelIterator`]: trait.ParallelIterator.html -#[must_use = "iterator adaptors are lazy and do nothing unless consumed"] -#[derive(Clone)] -pub struct FlatMapIter<I: ParallelIterator, F> { - base: I, - map_op: F, -} - -impl<I: ParallelIterator + Debug, F> Debug for FlatMapIter<I, F> { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.debug_struct("FlatMapIter") - .field("base", &self.base) - .finish() - } -} - -impl<I: ParallelIterator, F> FlatMapIter<I, F> { - /// Creates a new `FlatMapIter` iterator. - pub(super) fn new(base: I, map_op: F) -> Self { - FlatMapIter { base, map_op } - } -} - -impl<I, F, SI> ParallelIterator for FlatMapIter<I, F> -where - I: ParallelIterator, - F: Fn(I::Item) -> SI + Sync + Send, - SI: IntoIterator, - SI::Item: Send, -{ - type Item = SI::Item; - - fn drive_unindexed<C>(self, consumer: C) -> C::Result - where - C: UnindexedConsumer<Self::Item>, - { - let consumer = FlatMapIterConsumer::new(consumer, &self.map_op); - self.base.drive_unindexed(consumer) - } -} - -/// //////////////////////////////////////////////////////////////////////// -/// Consumer implementation - -struct FlatMapIterConsumer<'f, C, F> { - base: C, - map_op: &'f F, -} - -impl<'f, C, F> FlatMapIterConsumer<'f, C, F> { - fn new(base: C, map_op: &'f F) -> Self { - FlatMapIterConsumer { base, map_op } - } -} - -impl<'f, T, U, C, F> Consumer<T> for FlatMapIterConsumer<'f, C, F> -where - C: UnindexedConsumer<U::Item>, - F: Fn(T) -> U + Sync, - U: IntoIterator, -{ - type Folder = FlatMapIterFolder<'f, C::Folder, F>; - 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); - ( - FlatMapIterConsumer::new(left, self.map_op), - FlatMapIterConsumer::new(right, self.map_op), - reducer, - ) - } - - fn into_folder(self) -> Self::Folder { - FlatMapIterFolder { - base: self.base.into_folder(), - map_op: self.map_op, - } - } - - fn full(&self) -> bool { - self.base.full() - } -} - -impl<'f, T, U, C, F> UnindexedConsumer<T> for FlatMapIterConsumer<'f, C, F> -where - C: UnindexedConsumer<U::Item>, - F: Fn(T) -> U + Sync, - U: IntoIterator, -{ - fn split_off_left(&self) -> Self { - FlatMapIterConsumer::new(self.base.split_off_left(), self.map_op) - } - - fn to_reducer(&self) -> Self::Reducer { - self.base.to_reducer() - } -} - -struct FlatMapIterFolder<'f, C, F> { - base: C, - map_op: &'f F, -} - -impl<'f, T, U, C, F> Folder<T> for FlatMapIterFolder<'f, C, F> -where - C: Folder<U::Item>, - F: Fn(T) -> U, - U: IntoIterator, -{ - type Result = C::Result; - - fn consume(self, item: T) -> Self { - let map_op = self.map_op; - let base = self.base.consume_iter(map_op(item)); - FlatMapIterFolder { base, map_op } - } - - fn consume_iter<I>(self, iter: I) -> Self - where - I: IntoIterator<Item = T>, - { - let map_op = self.map_op; - let iter = iter.into_iter().flat_map(map_op); - let base = self.base.consume_iter(iter); - FlatMapIterFolder { base, map_op } - } - - fn complete(self) -> Self::Result { - self.base.complete() - } - - fn full(&self) -> bool { - self.base.full() - } -} |