\begin{code}
module DsMonad (
- DsM, mappM, mapAndUnzipM,
- initDs, initDsTc, returnDs, thenDs, listDs, fixDs, mapAndUnzipDs,
- foldlDs, foldrDs,
+ DsM, mapM, mapAndUnzipM,
+ initDs, initDsTc, fixDs,
+ foldlM, foldrM, ifOptM,
+ Applicative(..),(<$>),
newTyVarsDs, newLocalName,
duplicateLocalDs, newSysLocalDs, newSysLocalsDs, newUniqueId,
UniqSupply, newUniqueSupply,
getDOptsDs, getGhcModeDs, doptDs,
dsLookupGlobal, dsLookupGlobalId, dsLookupTyCon, dsLookupDataCon,
+ dsLookupClass,
DsMetaEnv, DsMetaVal(..), dsLookupMetaEnv, dsExtendMetaEnv,
- getBkptSitesDs,
-- Warnings
DsWarning, warnDs, failWithDs,
import Bag
import DataCon
import TyCon
+import Class
import Id
import Module
import Var
import OccName
import DynFlags
import ErrUtils
-import Bag
-import Breakpoints
-import OccName
+import MonadUtils
+import FastString
import Data.IORef
-
-infixr 9 `thenDs`
\end{code}
%************************************************************************
eqn_rhs :: MatchResult } -- What to do after match
type DsWrapper = CoreExpr -> CoreExpr
+idDsWrapper :: DsWrapper
idDsWrapper e = e
-- The semantics of (match vs (EqnInfo wrap pats rhs)) is the MatchResult
data CanItFail = CanFail | CantFail
+orFail :: CanItFail -> CanItFail -> CanItFail
orFail CantFail CantFail = CantFail
-orFail _ _ = CanFail
+orFail _ _ = CanFail
\end{code}
type DsM result = TcRnIf DsGblEnv DsLclEnv result
-- Compatibility functions
+fixDs :: (a -> DsM a) -> DsM a
fixDs = fixM
-thenDs = thenM
-returnDs = returnM
-listDs = sequenceM
-foldlDs = foldlM
-foldrDs = foldrM
-mapAndUnzipDs = mapAndUnzipM
-
type DsWarning = (SrcSpan, SDoc)
-- Not quite the same as a WarnMsg, we have an SDoc here
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 {
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
+ ; let dflags = hsc_dflags hsc_env
+ ; (ds_gbl_env, ds_lcl_env) <- mkDsEnvs dflags 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)
-- Display any errors and warnings
-- Note: if -Werror is used, we don't signal an error here.
- ; let dflags = hsc_dflags hsc_env
; msgs <- readIORef msg_var
; printErrorsAndWarnings dflags msgs
= do { this_mod <- getModule
; tcg_env <- getGblEnv
; msg_var <- getErrsVar
+ ; dflags <- getDOpts
; 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 }
-
-mkDsEnvs :: Module -> GlobalRdrEnv -> TypeEnv
- -> IORef Messages -> (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 }
+ ; ds_envs <- liftIO $ mkDsEnvs dflags this_mod rdr_env type_env msg_var
+ ; setEnvs ds_envs thing_inside }
+
+mkDsEnvs :: DynFlags -> Module -> GlobalRdrEnv -> TypeEnv -> IORef Messages -> IO (DsGblEnv, DsLclEnv)
+mkDsEnvs dflags mod rdr_env type_env msg_var
+ = do -- TODO: unnecessarily monadic
+ 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 dflags rdr_env,
+ ds_msgs = msg_var}
+ lcl_env = DsLclEnv { ds_meta = emptyNameEnv,
+ ds_loc = noSrcSpan }
+
+ return (gbl_env, lcl_env)
+
\end{code}
%************************************************************************
\begin{code}
-- Make a new Id with the same print name, but different type, and new unique
newUniqueId :: Name -> Type -> DsM Id
-newUniqueId id ty
- = newUnique `thenDs` \ uniq ->
- returnDs (mkSysLocal (occNameFS (nameOccName id)) uniq ty)
+newUniqueId id ty = do
+ uniq <- newUnique
+ return (mkSysLocal (occNameFS (nameOccName id)) uniq ty)
duplicateLocalDs :: Id -> DsM Id
-duplicateLocalDs old_local
- = newUnique `thenDs` \ uniq ->
- returnDs (setIdUnique old_local uniq)
+duplicateLocalDs old_local = do
+ uniq <- newUnique
+ return (setIdUnique old_local uniq)
newSysLocalDs, newFailLocalDs :: Type -> DsM Id
-newSysLocalDs ty
- = newUnique `thenDs` \ uniq ->
- returnDs (mkSysLocal FSLIT("ds") uniq ty)
+newSysLocalDs ty = do
+ uniq <- newUnique
+ return (mkSysLocal FSLIT("ds") uniq ty)
-newSysLocalsDs tys = mappM newSysLocalDs tys
+newSysLocalsDs :: [Type] -> DsM [Id]
+newSysLocalsDs tys = mapM newSysLocalDs tys
-newFailLocalDs ty
- = newUnique `thenDs` \ uniq ->
- returnDs (mkSysLocal FSLIT("fail") uniq ty)
+newFailLocalDs ty = do
+ uniq <- newUnique
+ return (mkSysLocal FSLIT("fail") uniq ty)
-- The UserLocal bit just helps make the code a little clearer
\end{code}
\begin{code}
newTyVarsDs :: [TyVar] -> DsM [TyVar]
-newTyVarsDs tyvar_tmpls
- = newUniqueSupply `thenDs` \ uniqs ->
- returnDs (zipWith setTyVarUnique tyvar_tmpls (uniqsFromSupply uniqs))
+newTyVarsDs tyvar_tmpls = do
+ uniqs <- newUniqueSupply
+ return (zipWith setTyVarUnique tyvar_tmpls (uniqsFromSupply uniqs))
\end{code}
We can also reach out and either set/grab location information from
dsLookupGlobalId :: Name -> DsM Id
dsLookupGlobalId name
- = dsLookupGlobal name `thenDs` \ thing ->
- returnDs (tyThingId thing)
+ = tyThingId <$> dsLookupGlobal name
dsLookupTyCon :: Name -> DsM TyCon
dsLookupTyCon name
- = dsLookupGlobal name `thenDs` \ thing ->
- returnDs (tyThingTyCon thing)
+ = tyThingTyCon <$> dsLookupGlobal name
dsLookupDataCon :: Name -> DsM DataCon
dsLookupDataCon name
- = dsLookupGlobal name `thenDs` \ thing ->
- returnDs (tyThingDataCon thing)
+ = tyThingDataCon <$> dsLookupGlobal name
+
+dsLookupClass :: Name -> DsM Class
+dsLookupClass name
+ = tyThingClass <$> dsLookupGlobal name
\end{code}
\begin{code}
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}
-
projects / ghc-hetmet.git / blobdiff