[pbs-devel] [PATCH backup] snapshot_reader: Simplify struct definition

[Maximiliano Sandoval <m.sandoval@proxmox.com>]

Allow us to remove the Clippy exception and makes this code more
readable.

Signed-off-by: Maximiliano Sandoval <m.sandoval@proxmox.com>
---
 pbs-datastore/src/snapshot_reader.rs | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/pbs-datastore/src/snapshot_reader.rs b/pbs-datastore/src/snapshot_reader.rs
index ec7a48e5..7c626a06 100644
--- a/pbs-datastore/src/snapshot_reader.rs
+++ b/pbs-datastore/src/snapshot_reader.rs
@@ -116,6 +116,18 @@ impl SnapshotReader {
     }
 }
 
+struct CurrentIndex {
+    index: Box<dyn IndexFile>,
+    pos: usize,
+    list: Vec<(usize, u64)>,
+}
+
+impl CurrentIndex {
+    fn new(index: Box<dyn IndexFile>, pos: usize, list: Vec<(usize, u64)>) -> Self {
+        CurrentIndex { index, pos, list }
+    }
+}
+
 /// Iterates over all chunks used by a backup snapshot
 ///
 /// Note: The iterator returns a `Result`, and the iterator state is
@@ -125,8 +137,7 @@ pub struct SnapshotChunkIterator<'a, F: Fn(&[u8; 32]) -> bool> {
     snapshot_reader: &'a SnapshotReader,
     todo_list: Vec<String>,
     skip_fn: F,
-    #[allow(clippy::type_complexity)]
-    current_index: Option<(Arc<Box<dyn IndexFile + Send>>, usize, Vec<(usize, u64)>)>,
+    current_index: Option<CurrentIndex>,
 }
 
 impl<'a, F: Fn(&[u8; 32]) -> bool> Iterator for SnapshotChunkIterator<'a, F> {
@@ -153,16 +164,16 @@ impl<'a, F: Fn(&[u8; 32]) -> bool> Iterator for SnapshotChunkIterator<'a, F> {
                         let order =
                             datastore.get_chunks_in_order(&*index, &self.skip_fn, |_| Ok(()))?;
 
-                        self.current_index = Some((Arc::new(index), 0, order));
+                        self.current_index = Some(CurrentIndex::new(index, 0, order));
                     } else {
                         return Ok(None);
                     }
                 }
-                let (index, pos, list) = self.current_index.take().unwrap();
+                let CurrentIndex { index, pos, list } = self.current_index.take().unwrap();
                 if pos < list.len() {
                     let (real_pos, _) = list[pos];
                     let digest = *index.index_digest(real_pos).unwrap();
-                    self.current_index = Some((index, pos + 1, list));
+                    self.current_index = Some(CurrentIndex::new(index, pos + 1, list));
                     return Ok(Some(digest));
                 } else {
                     // pop next index
-- 
2.39.2