+-- Dependency info about modules and packages below this one
+-- in the import hierarchy. See TcRnTypes.ImportAvails for details.
+--
+-- Invariant: the dependencies of a module M never includes M
+type Dependencies
+ = ([(ModuleName, WhetherHasOrphans, IsBootInterface)], [PackageName])
+
+data Usage name
+ = Usage { usg_name :: ModuleName, -- Name of the module
+ usg_mod :: Version, -- Module version
+ usg_exports :: Maybe Version, -- Export-list version, if we depend on it
+ usg_entities :: [(name,Version)], -- Sorted by occurrence name
+ usg_rules :: Version -- Rules version
+ } deriving( Eq )
+ -- This type doesn't let you say "I imported f but none of the rules in