1 files changed, 27 insertions, 0 deletions
diff --git a/vendor/hashbrown-0.12.3/src/external_trait_impls/rayon/helpers.rs b/vendor/hashbrown-0.12.3/src/external_trait_impls/rayon/helpers.rs
new file mode 100644
index 000000000..070b08cd5
--- /dev/null
+++ b/vendor/hashbrown-0.12.3/src/external_trait_impls/rayon/helpers.rs
@@ -0,0 +1,27 @@
+use alloc::collections::LinkedList;
+use alloc::vec::Vec;
+
+use rayon::iter::{IntoParallelIterator, ParallelIterator};
+
+/// Helper for collecting parallel iterators to an intermediary
+#[allow(clippy::linkedlist)] // yes, we need linked list here for efficient appending!
+pub(super) fn collect<I: IntoParallelIterator>(iter: I) -> (LinkedList<Vec<I::Item>>, usize) {
+    let list = iter
+        .into_par_iter()
+        .fold(Vec::new, |mut vec, elem| {
+            vec.push(elem);
+            vec
+        })
+        .map(|vec| {
+            let mut list = LinkedList::new();
+            list.push_back(vec);
+            list
+        })
+        .reduce(LinkedList::new, |mut list1, mut list2| {
+            list1.append(&mut list2);
+            list1
+        });
+
+    let len = list.iter().map(Vec::len).sum();
+    (list, len)
+}