1 files changed, 11 insertions, 11 deletions

diff --git a/db/snapshot.h b/db/snapshot.h
index 9a90756..a08dbd3 100644
--- a/db/snapshot.h
+++ b/db/snapshot.h
@@ -12,17 +12,17 @@ namespace leveldb {
 class SnapshotList;
 
 // Snapshots are kept in a doubly-linked list in the DB.
-// Each Snapshot corresponds to a particular sequence number.
-class Snapshot {
+// Each SnapshotImpl corresponds to a particular sequence number.
+class SnapshotImpl : public Snapshot {
  public:
   SequenceNumber number_;  // const after creation
 
  private:
   friend class SnapshotList;
 
-  // Snapshot is kept in a doubly-linked circular list
-  Snapshot* prev_;
-  Snapshot* next_;
+  // SnapshotImpl is kept in a doubly-linked circular list
+  SnapshotImpl* prev_;
+  SnapshotImpl* next_;
 
   SnapshotList* list_;                 // just for sanity checks
 };
@@ -35,11 +35,11 @@ class SnapshotList {
   }
 
   bool empty() const { return list_.next_ == &list_; }
-  Snapshot* oldest() const { assert(!empty()); return list_.next_; }
-  Snapshot* newest() const { assert(!empty()); return list_.prev_; }
+  SnapshotImpl* oldest() const { assert(!empty()); return list_.next_; }
+  SnapshotImpl* newest() const { assert(!empty()); return list_.prev_; }
 
-  const Snapshot* New(SequenceNumber seq) {
-    Snapshot* s = new Snapshot;
+  const SnapshotImpl* New(SequenceNumber seq) {
+    SnapshotImpl* s = new SnapshotImpl;
     s->number_ = seq;
     s->list_ = this;
     s->next_ = &list_;
@@ -49,7 +49,7 @@ class SnapshotList {
     return s;
   }
 
-  void Delete(const Snapshot* s) {
+  void Delete(const SnapshotImpl* s) {
     assert(s->list_ == this);
     s->prev_->next_ = s->next_;
     s->next_->prev_ = s->prev_;
@@ -58,7 +58,7 @@ class SnapshotList {
 
  private:
   // Dummy head of doubly-linked list of snapshots
-  Snapshot list_;
+  SnapshotImpl list_;
 };
 
 }