implement vfs events handling

1 files changed, 6 insertions, 1 deletions

diff --git a/crates/ra_vfs/src/arena.rs b/crates/ra_vfs/src/arena.rs
index d6fad753b..6b42ae26d 100644
--- a/crates/ra_vfs/src/arena.rs
+++ b/crates/ra_vfs/src/arena.rs
@@ -1,5 +1,4 @@
 use std::{
-    hash::{Hash, Hasher},
     marker::PhantomData,
     ops::{Index, IndexMut},
 };
@@ -21,6 +20,12 @@ impl<ID: ArenaId, T> Arena<ID, T> {
         self.data.push(value);
         ID::from_u32(id)
     }
+    pub fn iter<'a>(&'a self) -> impl Iterator<Item = (ID, &'a T)> {
+        self.data
+            .iter()
+            .enumerate()
+            .map(|(idx, value)| (ID::from_u32(idx as u32), value))
+    }
 }
 
 impl<ID: ArenaId, T> Default for Arena<ID, T> {