Major refactoring of the type inference engine

[ghc-hetmet.git] / compiler / main / HscTypes.lhs

diff --git a/compiler/main/HscTypes.lhs b/compiler/main/HscTypes.lhs
index bb874bc..5d53739 100644 (file)
--- a/compiler/main/HscTypes.lhs
+++ b/compiler/main/HscTypes.lhs
@@ -860,17 +860,21 @@ emptyModIface mod
 -- | Interactive context, recording information relevant to GHCi
 data InteractiveContext 
   = InteractiveContext { 
-       ic_toplev_scope :: [Module],    -- ^ The context includes the "top-level" scope of
+          ic_toplev_scope :: [Module]   -- ^ The context includes the "top-level" scope of
                                        -- these modules
 
-       ic_exports :: [(Module, Maybe (ImportDecl RdrName))],           -- ^ The context includes just the exported parts of these
+        , ic_exports :: [(Module, Maybe (ImportDecl RdrName))]    -- ^ The context includes just the exported parts of these
                                        -- modules
 
-       ic_rn_gbl_env :: GlobalRdrEnv,  -- ^ The contexts' cached 'GlobalRdrEnv', built from
+        , ic_rn_gbl_env :: GlobalRdrEnv -- ^ The contexts' cached 'GlobalRdrEnv', built from
                                        -- 'ic_toplev_scope' and 'ic_exports'
 
-       ic_tmp_ids :: [Id]              -- ^ Names bound during interaction with the user.
-                                        -- Later Ids shadow earlier ones with the same OccName.
+        , ic_tmp_ids :: [Id]   -- ^ Names bound during interaction with the user.
+                               -- Later Ids shadow earlier ones with the same OccName
+                               -- Expressions are typed with these Ids in the envt
+                               -- For runtime-debugging, these Ids may have free
+                               -- TcTyVars of RuntimUnkSkol flavour, but no free TyVars
+                               -- (because the typechecker doesn't expect that)
 
 #ifdef GHCI
         , ic_resume :: [Resume]         -- ^ The stack of breakpoint contexts