+ -- Associated_Node (Node4-Sem)
+ -- Present in nodes that can denote an entity: identifiers, character
+ -- literals and expanded names, operator nodes that carry an entity
+ -- reference, and also in N_Aggregate, N_Selected_Component, and
+ -- N_Extension_Aggregate nodes. This field is used during generic
+ -- processing to relate nodes in the original template to nodes in the
+ -- generic copy. It overlaps the Entity field, and is used to capture
+ -- global references in the analyzed copy and place them in the template.
+ -- see description in Sem_Ch12 for further details on this usage.
+