Add unstable sorting functions

adri326 · May 26, 2023 · 5ff9859 · 5ff9859
1 parent a7db6b2
commit 5ff9859
Showing 1 changed file with 18 additions and 0 deletions.
diff --git a/src/lib.rs b/src/lib.rs
@@ -615,6 +615,15 @@ impl<T> VecCell<T> {
         T: Ord,
         F: FnMut(&T, &T) -> Ordering,
     {
+        assert_eq!(
+            self.borrows.get(),
+            0,
+            "Sorting requires that no item is currently borrowed"
+        );
+        assert!(
+            self.mut_borrow.get().is_none(),
+            "Sorting requires that no item is currently (mutably) borrowed"
+        );
         self.inner.sort_unstable_by(|a, b| {
             // SAFETY: self is borrowed mutably and a and b are not itself changed.
             let a = unsafe { &*a.get() };
@@ -651,6 +660,15 @@ impl<T> VecCell<T> {
         F: FnMut(&T) -> K,
         K: Ord,
     {
+        assert_eq!(
+            self.borrows.get(),
+            0,
+            "Sorting requires that no item is currently borrowed"
+        );
+        assert!(
+            self.mut_borrow.get().is_none(),
+            "Sorting requires that no item is currently (mutably) borrowed"
+        );
         self.inner.sort_unstable_by(|a, b| {
             // SAFETY: self is borrowed mutably and a and b are not itself changed.
             let a = f(unsafe { &*a.get() });