#2435: lb: add helper and sentinel to header file

Author: lifflander

src/vt/vrt/collection/balance/temperedlb/temperedlb.h

@@ -214,6 +214,22 @@ struct TemperedLB : BaseLB {
    */
   ClusterInfo makeClusterSummary(SharedIDType shared_id);
 
+  /**
+   * \brief Helper to add edges to cluster summary
+   *
+   *  \param[in] shared_id the shared ID
+   *  \param[in] info cluster info
+   *  \param[in] cluster_objs cluster objs
+   *  \param[in] obj the sending or receiving object
+   *  \param[in] is_send whether it's a send or recv edge
+   *  \param[in] iter edge iterator
+   */
+  void makeClusterSummaryAddEdges(
+    SharedIDType shared_id, ClusterInfo& info,
+    std::set<ObjIDType> const& cluster_objs,
+    ObjIDType obj, bool is_send, typename EdgeMapType::iterator iter
+  );
+
   /**
    * \brief Try to lock a rank
    *
@@ -529,6 +545,8 @@ struct TemperedLB : BaseLB {
     }
   };
 
+  /// Whether a cluster does not have a shared ID
+  SharedIDType const no_shared_id = -1;
   /// Whether we have memory information
   bool has_memory_data_ = false;
   /// Working bytes for this rank