FIX #1651: use family instances during interactive typechecking

[ghc-hetmet.git] / compiler / typecheck / TcRnDriver.lhs

diff --git a/compiler/typecheck/TcRnDriver.lhs b/compiler/typecheck/TcRnDriver.lhs
index 4a3cb5e..7c79e62 100644 (file)
--- a/compiler/typecheck/TcRnDriver.lhs
+++ b/compiler/typecheck/TcRnDriver.lhs
@@ -5,6 +5,13 @@
 \section[TcModule]{Typechecking a whole module}
 
 \begin{code}
+{-# OPTIONS -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+--     http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
+-- for details
+
 module TcRnDriver (
 #ifdef GHCI
        tcRnStmt, tcRnExpr, tcRnType,
@@ -245,7 +252,7 @@ tcRnImports hsc_env this_mod import_decls
 
                -- Check type-familily consistency
        ; traceRn (text "rn1: checking family instance consistency")
-       ; let { dir_imp_mods = map (\ (mod, _, _) -> mod) 
+       ; let { dir_imp_mods = map (\ (mod, _) -> mod) 
                             . moduleEnvElts 
                             . imp_mods 
                             $ imports }
@@ -830,16 +837,16 @@ get two defns for 'main' in the interface file!
 #ifdef GHCI
 setInteractiveContext :: HscEnv -> InteractiveContext -> TcRn a -> TcRn a
 setInteractiveContext hsc_env icxt thing_inside 
-  = let 
-       -- Initialise the tcg_inst_env with instances 
-       -- from all home modules.  This mimics the more selective
-       -- call to hptInstances in tcRnModule
-       dfuns = fst (hptInstances hsc_env (\mod -> True))
+  = let -- Initialise the tcg_inst_env with instances from all home modules.  
+        -- This mimics the more selective call to hptInstances in tcRnModule.
+       (home_insts, home_fam_insts) = hptInstances hsc_env (\mod -> True)
     in
     updGblEnv (\env -> env { 
-       tcg_rdr_env  = ic_rn_gbl_env icxt,
-       tcg_inst_env = extendInstEnvList (tcg_inst_env env) dfuns }) $
-
+       tcg_rdr_env      = ic_rn_gbl_env icxt,
+       tcg_inst_env     = extendInstEnvList    (tcg_inst_env env) home_insts,
+       tcg_fam_inst_env = extendFamInstEnvList (tcg_fam_inst_env env) 
+                                                home_fam_insts 
+      }) $
 
     tcExtendGhciEnv (ic_tmp_ids icxt) $
         -- tcExtendGhciEnv does lots: 
@@ -1060,16 +1067,18 @@ tcGhciStmts stmts
         } ;
 
        -- OK, we're ready to typecheck the stmts
-       traceTc (text "tcs 2") ;
+       traceTc (text "TcRnDriver.tcGhciStmts: tc stmts") ;
        ((tc_stmts, ids), lie) <- getLIE $ tc_io_stmts stmts $ \ _ ->
                                           mappM tcLookupId names ;
                                        -- Look up the names right in the middle,
                                        -- where they will all be in scope
 
        -- Simplify the context
+       traceTc (text "TcRnDriver.tcGhciStmts: simplify ctxt") ;
        const_binds <- checkNoErrs (tcSimplifyInteractive lie) ;
                -- checkNoErrs ensures that the plan fails if context redn fails
 
+       traceTc (text "TcRnDriver.tcGhciStmts: done") ;
        return (ids, mkHsDictLet const_binds $
                     noLoc (HsDo DoExpr tc_stmts (mk_return ids) io_ret_ty))
     }