Delete index cell by Cursor::delete()

src/btree.rs

@@ -173,6 +173,12 @@ impl BtreePageType {
         self.0 & (MASK) == MASK
     }
 
+    #[inline]
+    pub fn is_index_interior(&self) -> bool {
+        const MASK: u8 = LEAF_FLAG | INDEX_FLAG;
+        self.0 & (MASK) == INDEX_FLAG
+    }
+
     /// The btree page header size.
     ///
     /// * Returns 8 if this is a leaf page.
@@ -811,11 +817,11 @@ pub fn allocate_from_unallocated_space(
 }
 
 /// Write a table leaf cell to the specified offset.
-pub fn write_leaf_cell<P: Payload<()>>(
+pub fn write_leaf_cell(
     buffer: &mut PageBufferMut,
     offset: usize,
     cell_header: &[u8],
-    payload: &P,
+    payload: &dyn Payload<()>,
     n_local: u16,
     overflow_page_id: Option<PageId>,
 ) {