Implement fuzzy matching for the renamer

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

diff --git a/compiler/typecheck/TcRnMonad.lhs b/compiler/typecheck/TcRnMonad.lhs
index 65128ba..6cfbc20 100644 (file)
--- a/compiler/typecheck/TcRnMonad.lhs
+++ b/compiler/typecheck/TcRnMonad.lhs
@@ -22,6 +22,7 @@ import Name
 import TcType
 import InstEnv
 import FamInstEnv
+import PrelNames        ( iNTERACTIVE )
 
 import Var
 import Id
@@ -71,8 +72,7 @@ initTc hsc_env hsc_src keep_rn_syntax mod do_this
  = do { errs_var     <- newIORef (emptyBag, emptyBag) ;
         meta_var     <- newIORef initTyVarUnique ;
        tvs_var      <- newIORef emptyVarSet ;
-       dfuns_var    <- newIORef emptyNameSet ;
-       keep_var     <- newIORef emptyNameSet ;
+        keep_var     <- newIORef emptyNameSet ;
         used_rdr_var <- newIORef Set.empty ;
        th_var       <- newIORef False ;
        lie_var      <- newIORef emptyBag ;
@@ -97,8 +97,7 @@ initTc hsc_env hsc_src keep_rn_syntax mod do_this
                tcg_type_env_var = type_env_var,
                tcg_inst_env  = emptyInstEnv,
                tcg_fam_inst_env  = emptyFamInstEnv,
-               tcg_inst_uses = dfuns_var,
-               tcg_th_used   = th_var,
+                tcg_th_used   = th_var,
                tcg_exports  = [],
                tcg_imports  = emptyImportAvails,
                 tcg_used_rdrnames = used_rdr_var,
@@ -453,6 +452,9 @@ getModule = do { env <- getGblEnv; return (tcg_mod env) }
 setModule :: Module -> TcRn a -> TcRn a
 setModule mod thing_inside = updGblEnv (\env -> env { tcg_mod = mod }) thing_inside
 
+getIsGHCi :: TcRn Bool
+getIsGHCi = do { mod <- getModule; return (mod == iNTERACTIVE) }
+
 tcIsHsBoot :: TcRn Bool
 tcIsHsBoot = do { env <- getGblEnv; return (isHsBoot (tcg_src env)) }
 
@@ -610,6 +612,14 @@ addLongErrAt loc msg extra
         let { err = mkLongErrMsg loc (mkPrintUnqualified dflags rdr_env) msg extra } ;
         (warns, errs) <- readTcRef errs_var ;
         writeTcRef errs_var (warns, errs `snocBag` err) }
+
+dumpDerivingInfo :: SDoc -> TcM ()
+dumpDerivingInfo doc
+  = do { dflags <- getDOpts
+       ; when (dopt Opt_D_dump_deriv dflags) $ do
+       { rdr_env <- getGlobalRdrEnv
+       ; let unqual = mkPrintUnqualified dflags rdr_env
+       ; liftIO (putMsgWith dflags unqual doc) } }
 \end{code}