1 files changed, 71 insertions, 0 deletions
diff --git a/third_party/rust/dashmap/src/iter_set.rs b/third_party/rust/dashmap/src/iter_set.rs
new file mode 100644
index 0000000000..619a5b500e
--- /dev/null
+++ b/third_party/rust/dashmap/src/iter_set.rs
@@ -0,0 +1,71 @@
+use crate::setref::multiple::RefMulti;
+use crate::t::Map;
+use core::hash::{BuildHasher, Hash};
+
+pub struct OwningIter<K, S> {
+    inner: crate::iter::OwningIter<K, (), S>,
+}
+
+impl<K: Eq + Hash, S: BuildHasher + Clone> OwningIter<K, S> {
+    pub(crate) fn new(inner: crate::iter::OwningIter<K, (), S>) -> Self {
+        Self { inner }
+    }
+}
+
+impl<K: Eq + Hash, S: BuildHasher + Clone> Iterator for OwningIter<K, S> {
+    type Item = K;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        self.inner.next().map(|(k, _)| k)
+    }
+}
+
+unsafe impl<K, S> Send for OwningIter<K, S>
+where
+    K: Eq + Hash + Send,
+    S: BuildHasher + Clone + Send,
+{
+}
+
+unsafe impl<K, S> Sync for OwningIter<K, S>
+where
+    K: Eq + Hash + Sync,
+    S: BuildHasher + Clone + Sync,
+{
+}
+
+pub struct Iter<'a, K, S, M> {
+    inner: crate::iter::Iter<'a, K, (), S, M>,
+}
+
+unsafe impl<'a, 'i, K, S, M> Send for Iter<'i, K, S, M>
+where
+    K: 'a + Eq + Hash + Send,
+    S: 'a + BuildHasher + Clone,
+    M: Map<'a, K, (), S>,
+{
+}
+
+unsafe impl<'a, 'i, K, S, M> Sync for Iter<'i, K, S, M>
+where
+    K: 'a + Eq + Hash + Sync,
+    S: 'a + BuildHasher + Clone,
+    M: Map<'a, K, (), S>,
+{
+}
+
+impl<'a, K: Eq + Hash, S: 'a + BuildHasher + Clone, M: Map<'a, K, (), S>> Iter<'a, K, S, M> {
+    pub(crate) fn new(inner: crate::iter::Iter<'a, K, (), S, M>) -> Self {
+        Self { inner }
+    }
+}
+
+impl<'a, K: Eq + Hash, S: 'a + BuildHasher + Clone, M: Map<'a, K, (), S>> Iterator
+    for Iter<'a, K, S, M>
+{
+    type Item = RefMulti<'a, K, S>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        self.inner.next().map(RefMulti::new)
+    }
+}