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use crate::setref::multiple::RefMulti;
use crate::DashSet;
use core::hash::{BuildHasher, Hash};
use rayon::iter::plumbing::UnindexedConsumer;
use rayon::iter::{FromParallelIterator, IntoParallelIterator, ParallelExtend, ParallelIterator};
use std::collections::hash_map::RandomState;
impl<K, S> ParallelExtend<K> for DashSet<K, S>
where
K: Send + Sync + Eq + Hash,
S: Send + Sync + Clone + BuildHasher,
{
fn par_extend<I>(&mut self, par_iter: I)
where
I: IntoParallelIterator<Item = K>,
{
(&*self).par_extend(par_iter);
}
}
impl<K, S> ParallelExtend<K> for &'_ DashSet<K, S>
where
K: Send + Sync + Eq + Hash,
S: Send + Sync + Clone + BuildHasher,
{
fn par_extend<I>(&mut self, par_iter: I)
where
I: IntoParallelIterator<Item = K>,
{
let &mut set = self;
par_iter.into_par_iter().for_each(move |key| {
set.insert(key);
});
}
}
impl<K, S> FromParallelIterator<K> for DashSet<K, S>
where
K: Send + Sync + Eq + Hash,
S: Send + Sync + Clone + Default + BuildHasher,
{
fn from_par_iter<I>(par_iter: I) -> Self
where
I: IntoParallelIterator<Item = K>,
{
let set = Self::default();
(&set).par_extend(par_iter);
set
}
}
impl<K, S> IntoParallelIterator for DashSet<K, S>
where
K: Send + Eq + Hash,
S: Send + Clone + BuildHasher,
{
type Iter = OwningIter<K, S>;
type Item = K;
fn into_par_iter(self) -> Self::Iter {
OwningIter {
inner: self.inner.into_par_iter(),
}
}
}
pub struct OwningIter<K, S = RandomState> {
inner: super::map::OwningIter<K, (), S>,
}
impl<K, S> ParallelIterator for OwningIter<K, S>
where
K: Send + Eq + Hash,
S: Send + Clone + BuildHasher,
{
type Item = K;
fn drive_unindexed<C>(self, consumer: C) -> C::Result
where
C: UnindexedConsumer<Self::Item>,
{
self.inner.map(|(k, _)| k).drive_unindexed(consumer)
}
}
impl<'a, K, S> IntoParallelIterator for &'a DashSet<K, S>
where
K: Send + Sync + Eq + Hash,
S: Send + Sync + Clone + BuildHasher,
{
type Iter = Iter<'a, K, S>;
type Item = RefMulti<'a, K, S>;
fn into_par_iter(self) -> Self::Iter {
Iter {
inner: (&self.inner).into_par_iter(),
}
}
}
pub struct Iter<'a, K, S = RandomState> {
inner: super::map::Iter<'a, K, (), S>,
}
impl<'a, K, S> ParallelIterator for Iter<'a, K, S>
where
K: Send + Sync + Eq + Hash,
S: Send + Sync + Clone + BuildHasher,
{
type Item = RefMulti<'a, K, S>;
fn drive_unindexed<C>(self, consumer: C) -> C::Result
where
C: UnindexedConsumer<Self::Item>,
{
self.inner.map(RefMulti::new).drive_unindexed(consumer)
}
}