Add {-# OPTIONS_GHC -w #-} and some blurb to all compiler modules

[ghc-hetmet.git] / compiler / deSugar / DsMonad.lhs

diff --git a/compiler/deSugar/DsMonad.lhs b/compiler/deSugar/DsMonad.lhs
index 8d11931..4af6f68 100644 (file)
--- a/compiler/deSugar/DsMonad.lhs
+++ b/compiler/deSugar/DsMonad.lhs
@@ -6,6 +6,13 @@
 @DsMonad@: monadery used in desugaring
 
 \begin{code}
+{-# OPTIONS_GHC -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/WorkingConventions#Warnings
+-- for details
+
 module DsMonad (
        DsM, mappM, mapAndUnzipM,
        initDs, initDsTc, returnDs, thenDs, listDs, fixDs, mapAndUnzipDs, 
@@ -20,10 +27,10 @@ module DsMonad (
        UniqSupply, newUniqueSupply,
        getDOptsDs, getGhcModeDs, doptDs,
        dsLookupGlobal, dsLookupGlobalId, dsLookupTyCon, dsLookupDataCon,
+        dsLookupClass,
 
        DsMetaEnv, DsMetaVal(..), dsLookupMetaEnv, dsExtendMetaEnv,
 
-        getBkptSitesDs,
        -- Warnings
        DsWarning, warnDs, failWithDs,
 
@@ -44,6 +51,7 @@ import HscTypes
 import Bag
 import DataCon
 import TyCon
+import Class
 import Id
 import Module
 import Var
@@ -56,9 +64,6 @@ import NameEnv
 import OccName
 import DynFlags
 import ErrUtils
-import Bag
-import Breakpoints
-import OccName
 
 import Data.IORef
 
@@ -136,9 +141,8 @@ data DsGblEnv = DsGblEnv {
        ds_mod     :: Module,                   -- For SCC profiling
        ds_unqual  :: PrintUnqualified,
        ds_msgs    :: IORef Messages,           -- Warning messages
-       ds_if_env  :: (IfGblEnv, IfLclEnv),     -- Used for looking up global, 
+       ds_if_env  :: (IfGblEnv, IfLclEnv)      -- Used for looking up global, 
                                                -- possibly-imported things
-        ds_bkptSites :: IORef SiteMap  -- Inserted Breakpoints sites
     }
 
 data DsLclEnv = DsLclEnv {
@@ -166,7 +170,7 @@ initDs  :: HscEnv
 
 initDs hsc_env mod rdr_env type_env thing_inside
   = do         { msg_var <- newIORef (emptyBag, emptyBag)
-       ; let (ds_gbl_env, ds_lcl_env) = mkDsEnvs mod rdr_env type_env msg_var
+        ; (ds_gbl_env, ds_lcl_env) <- mkDsEnvs mod rdr_env type_env msg_var
 
        ; either_res <- initTcRnIf 'd' hsc_env ds_gbl_env ds_lcl_env $
                        tryM thing_inside       -- Catch exceptions (= errors during desugaring)
@@ -194,21 +198,24 @@ initDsTc thing_inside
        ; msg_var  <- getErrsVar
        ; let type_env = tcg_type_env tcg_env
              rdr_env  = tcg_rdr_env tcg_env
-       ; setEnvs (mkDsEnvs this_mod rdr_env type_env msg_var) thing_inside }
+        ; ds_envs <- ioToIOEnv$ mkDsEnvs this_mod rdr_env type_env msg_var
+       ; setEnvs ds_envs thing_inside }
 
-mkDsEnvs :: Module -> GlobalRdrEnv -> TypeEnv
-        -> IORef Messages -> (DsGblEnv, DsLclEnv)
+mkDsEnvs :: Module -> GlobalRdrEnv -> TypeEnv -> IORef Messages -> IO (DsGblEnv, DsLclEnv)
 mkDsEnvs mod rdr_env type_env msg_var
-  = (gbl_env, lcl_env)
-  where
-    if_genv = IfGblEnv { if_rec_types = Just (mod, return type_env) }
-    if_lenv = mkIfLclEnv mod (ptext SLIT("GHC error in desugarer lookup in") <+> ppr mod)
-    gbl_env = DsGblEnv { ds_mod = mod, 
-                        ds_if_env = (if_genv, if_lenv),
-                        ds_unqual = mkPrintUnqualified rdr_env,
-                        ds_msgs = msg_var }
-    lcl_env = DsLclEnv { ds_meta = emptyNameEnv, 
-                        ds_loc = noSrcSpan }
+  = do 
+       sites_var <- newIORef []
+       let     if_genv = IfGblEnv { if_rec_types = Just (mod, return type_env) }
+               if_lenv = mkIfLclEnv mod (ptext SLIT("GHC error in desugarer lookup in") <+> ppr mod)
+               gbl_env = DsGblEnv { ds_mod = mod, 
+                                   ds_if_env = (if_genv, if_lenv),
+                                   ds_unqual = mkPrintUnqualified rdr_env,
+                                   ds_msgs = msg_var}
+               lcl_env = DsLclEnv { ds_meta = emptyNameEnv, 
+                                   ds_loc = noSrcSpan }
+
+       return (gbl_env, lcl_env)
+
 \end{code}
 
 %************************************************************************
@@ -316,6 +323,11 @@ dsLookupDataCon :: Name -> DsM DataCon
 dsLookupDataCon name
   = dsLookupGlobal name                `thenDs` \ thing ->
     returnDs (tyThingDataCon thing)
+
+dsLookupClass :: Name -> DsM Class
+dsLookupClass name
+  = dsLookupGlobal name         `thenDs` \ thing ->
+    returnDs (tyThingClass thing)
 \end{code}
 
 \begin{code}
@@ -326,11 +338,3 @@ dsExtendMetaEnv :: DsMetaEnv -> DsM a -> DsM a
 dsExtendMetaEnv menv thing_inside
   = updLclEnv (\env -> env { ds_meta = ds_meta env `plusNameEnv` menv }) thing_inside
 \end{code}
-
-\begin{code}
-
-getBkptSitesDs :: DsM (IORef SiteMap)
-getBkptSitesDs = do { env <- getGblEnv; return (ds_bkptSites env) }
-
-\end{code}
-