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use super::plumbing::*;
use super::*;
/// An [`IndexedParallelIterator`] that iterates over two parallel iterators of equal
/// length simultaneously.
///
/// This struct is created by the [`zip_eq`] method on [`IndexedParallelIterator`],
/// see its documentation for more information.
///
/// [`zip_eq`]: trait.IndexedParallelIterator.html#method.zip_eq
/// [`IndexedParallelIterator`]: trait.IndexedParallelIterator.html
#[must_use = "iterator adaptors are lazy and do nothing unless consumed"]
#[derive(Debug, Clone)]
pub struct ZipEq<A: IndexedParallelIterator, B: IndexedParallelIterator> {
zip: Zip<A, B>,
}
impl<A, B> ZipEq<A, B>
where
A: IndexedParallelIterator,
B: IndexedParallelIterator,
{
/// Creates a new `ZipEq` iterator.
pub(super) fn new(a: A, b: B) -> Self {
ZipEq {
zip: super::Zip::new(a, b),
}
}
}
impl<A, B> ParallelIterator for ZipEq<A, B>
where
A: IndexedParallelIterator,
B: IndexedParallelIterator,
{
type Item = (A::Item, B::Item);
fn drive_unindexed<C>(self, consumer: C) -> C::Result
where
C: UnindexedConsumer<Self::Item>,
{
bridge(self.zip, consumer)
}
fn opt_len(&self) -> Option<usize> {
Some(self.zip.len())
}
}
impl<A, B> IndexedParallelIterator for ZipEq<A, B>
where
A: IndexedParallelIterator,
B: IndexedParallelIterator,
{
fn drive<C>(self, consumer: C) -> C::Result
where
C: Consumer<Self::Item>,
{
bridge(self.zip, consumer)
}
fn len(&self) -> usize {
self.zip.len()
}
fn with_producer<CB>(self, callback: CB) -> CB::Output
where
CB: ProducerCallback<Self::Item>,
{
self.zip.with_producer(callback)
}
}