Add methods to check if sharing node is non-empty and of a certain type

Author: danpoe

src/util/sharing_map.h

@@ -894,6 +894,8 @@ SHARING_MAPT2(, innert *)::get_container_node(const key_type &k)
     key >>= chunk;
   }
 
+  SM_ASSERT(ip->is_container());
+
   return ip;
 }
 
@@ -916,6 +918,8 @@ SHARING_MAPT2(const, innert *)::get_container_node(const key_type &k) const
     key >>= chunk;
   }
 
+  SM_ASSERT(ip->is_defined_container());
+
   return ip;
 }
 

src/util/sharing_node.h

@@ -163,6 +163,16 @@ SN_TYPE_PAR_DEF class sharing_node_innert : public sharing_node_baset
     return data.is_derived_v();
   }
 
+  bool is_defined_internal() const
+  {
+    return !empty() && is_internal();
+  }
+
+  bool is_defined_container() const
+  {
+    return !empty() && is_container();
+  }
+
   const d_it &read_internal() const
   {
     SN_ASSERT(!empty());