%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
\section[DsMonad]{@DsMonad@: monadery used in desugaring}
duplicateLocalDs, newSysLocalDs, newSysLocalsDs,
newFailLocalDs,
getSrcLocDs, putSrcLocDs,
- getModuleAndGroupDs, getUniqueDs,
- extendEnvDs, lookupEnvDs,
- DsIdEnv,
+ getModuleAndGroupDs,
+ getUniqueDs,
+ dsLookupGlobalValue,
+ GlobalValueEnv,
dsWarn,
DsWarnings,
DsMatchContext(..), DsMatchKind(..), pprDsWarnings
import BasicTypes ( Module )
import ErrUtils ( WarnMsg )
import HsSyn ( OutPat )
-import MkId ( mkSysLocal )
-import Id ( mkIdWithNewUniq,
- lookupIdEnv, growIdEnvList, IdEnv, Id
- )
+import Id ( mkUserLocal, mkSysLocal, setIdUnique, Id )
+import Name ( Name, varOcc, maybeWiredInIdName )
+import Var ( TyVar, setTyVarUnique )
+import VarEnv
import Outputable
import SrcLoc ( noSrcLoc, SrcLoc )
import TcHsSyn ( TypecheckedPat )
+import TcEnv ( GlobalValueEnv )
import Type ( Type )
-import TyVar ( cloneTyVar, TyVar )
-import UniqSupply ( splitUniqSupply, getUnique, getUniques,
+import UniqSupply ( initUs, splitUniqSupply, uniqFromSupply, uniqsFromSupply,
UniqSM, UniqSupply )
-import Unique ( Unique )
+import Unique ( Unique )
+import UniqFM ( lookupWithDefaultUFM )
import Util ( zipWithEqual, panic )
infixr 9 `thenDs`
\begin{code}
type DsM result =
UniqSupply
+ -> GlobalValueEnv
-> SrcLoc -- to put in pattern-matching error msgs
-> (Module, Group) -- module + group name : for SCC profiling
- -> DsIdEnv
-> DsWarnings
-> (result, DsWarnings)
-- initDs returns the UniqSupply out the end (not just the result)
initDs :: UniqSupply
- -> DsIdEnv
+ -> GlobalValueEnv
-> (Module, Group) -- module name: for profiling; (group name: from switches)
-> DsM a
-> (a, DsWarnings)
-initDs init_us env module_and_group action
- = action init_us noSrcLoc module_and_group env emptyBag
+initDs init_us genv module_and_group action
+ = action init_us genv noSrcLoc module_and_group emptyBag
thenDs :: DsM a -> (a -> DsM b) -> DsM b
andDs :: (a -> a -> a) -> DsM a -> DsM a -> DsM a
-thenDs m1 m2 us loc mod_and_grp env warns
+thenDs m1 m2 us genv loc mod_and_grp warns
= case splitUniqSupply us of { (s1, s2) ->
- case (m1 s1 loc mod_and_grp env warns) of { (result, warns1) ->
- m2 result s2 loc mod_and_grp env warns1}}
+ case (m1 s1 genv loc mod_and_grp warns) of { (result, warns1) ->
+ m2 result s2 genv loc mod_and_grp warns1}}
-andDs combiner m1 m2 us loc mod_and_grp env warns
+andDs combiner m1 m2 us genv loc mod_and_grp warns
= case splitUniqSupply us of { (s1, s2) ->
- case (m1 s1 loc mod_and_grp env warns) of { (result1, warns1) ->
- case (m2 s2 loc mod_and_grp env warns1) of { (result2, warns2) ->
+ case (m1 s1 genv loc mod_and_grp warns) of { (result1, warns1) ->
+ case (m2 s2 genv loc mod_and_grp warns1) of { (result2, warns2) ->
(combiner result1 result2, warns2) }}}
returnDs :: a -> DsM a
-returnDs result us loc mod_and_grp env warns = (result, warns)
+returnDs result us genv loc mod_and_grp warns = (result, warns)
listDs :: [DsM a] -> DsM [a]
listDs [] = returnDs []
foldlDs k z (x:xs) = k z x `thenDs` \ r ->
foldlDs k r xs
-
mapAndUnzipDs :: (a -> DsM (b, c)) -> [a] -> DsM ([b], [c])
mapAndUnzipDs f [] = returnDs ([], [])
it easier to read debugging output.
\begin{code}
-newLocalDs :: FAST_STRING -> Type -> DsM Id
-newLocalDs nm ty us loc mod_and_grp env warns
- = case (getUnique us) of { assigned_uniq ->
- (mkSysLocal nm assigned_uniq ty loc, warns) }
+newSysLocalDs, newFailLocalDs :: Type -> DsM Id
+newSysLocalDs ty us genv loc mod_and_grp warns
+ = case uniqFromSupply us of { assigned_uniq ->
+ (mkSysLocal assigned_uniq ty, warns) }
+
+newSysLocalsDs tys = mapDs newSysLocalDs tys
-newSysLocalDs = newLocalDs SLIT("ds")
-newSysLocalsDs tys = mapDs (newLocalDs SLIT("ds")) tys
-newFailLocalDs = newLocalDs SLIT("fail")
+newFailLocalDs ty us genv loc mod_and_grp warns
+ = case uniqFromSupply us of { assigned_uniq ->
+ (mkUserLocal (varOcc SLIT("fail")) assigned_uniq ty, warns) }
+ -- The UserLocal bit just helps make the code a little clearer
getUniqueDs :: DsM Unique
-getUniqueDs us loc mod_and_grp env warns
- = case (getUnique us) of { assigned_uniq ->
+getUniqueDs us genv loc mod_and_grp warns
+ = case (uniqFromSupply us) of { assigned_uniq ->
(assigned_uniq, warns) }
duplicateLocalDs :: Id -> DsM Id
-duplicateLocalDs old_local us loc mod_and_grp env warns
- = case (getUnique us) of { assigned_uniq ->
- (mkIdWithNewUniq old_local assigned_uniq, warns) }
+duplicateLocalDs old_local us genv loc mod_and_grp warns
+ = case uniqFromSupply us of { assigned_uniq ->
+ (setIdUnique old_local assigned_uniq, warns) }
cloneTyVarsDs :: [TyVar] -> DsM [TyVar]
-cloneTyVarsDs tyvars us loc mod_and_grp env warns
- = case (getUniques (length tyvars) us) of { uniqs ->
- (zipWithEqual "cloneTyVarsDs" cloneTyVar tyvars uniqs, warns) }
+cloneTyVarsDs tyvars us genv loc mod_and_grp warns
+ = case uniqsFromSupply (length tyvars) us of { uniqs ->
+ (zipWithEqual "cloneTyVarsDs" setTyVarUnique tyvars uniqs, warns) }
\end{code}
\begin{code}
newTyVarsDs :: [TyVar] -> DsM [TyVar]
-newTyVarsDs tyvar_tmpls us loc mod_and_grp env warns
- = case (getUniques (length tyvar_tmpls) us) of { uniqs ->
- (zipWithEqual "newTyVarsDs" cloneTyVar tyvar_tmpls uniqs, warns) }
+newTyVarsDs tyvar_tmpls us genv loc mod_and_grp warns
+ = case uniqsFromSupply (length tyvar_tmpls) us of { uniqs ->
+ (zipWithEqual "newTyVarsDs" setTyVarUnique tyvar_tmpls uniqs, warns) }
\end{code}
We can also reach out and either set/grab location information from
\begin{code}
uniqSMtoDsM :: UniqSM a -> DsM a
-uniqSMtoDsM u_action us loc mod_and_grp env warns
- = (u_action us, warns)
+uniqSMtoDsM u_action us genv loc mod_and_grp warns
+ = (initUs us u_action, warns)
getSrcLocDs :: DsM SrcLoc
-getSrcLocDs us loc mod_and_grp env warns
+getSrcLocDs us genv loc mod_and_grp warns
= (loc, warns)
putSrcLocDs :: SrcLoc -> DsM a -> DsM a
-putSrcLocDs new_loc expr us old_loc mod_and_grp env warns
- = expr us new_loc mod_and_grp env warns
+putSrcLocDs new_loc expr us genv old_loc mod_and_grp warns
+ = expr us genv new_loc mod_and_grp warns
dsWarn :: WarnMsg -> DsM ()
-dsWarn warn us loc mod_and_grp env warns = ((), warns `snocBag` warn)
+dsWarn warn us genv loc mod_and_grp warns = ((), warns `snocBag` warn)
\end{code}
\begin{code}
getModuleAndGroupDs :: DsM (FAST_STRING, FAST_STRING)
-getModuleAndGroupDs us loc mod_and_grp env warns
+getModuleAndGroupDs us genv loc mod_and_grp warns
= (mod_and_grp, warns)
\end{code}
\begin{code}
-type DsIdEnv = IdEnv Id
-
-extendEnvDs :: [(Id, Id)] -> DsM a -> DsM a
-
-extendEnvDs pairs then_do us loc mod_and_grp old_env warns
- = then_do us loc mod_and_grp (growIdEnvList old_env pairs) warns
-
-lookupEnvDs :: Id -> DsM Id
-lookupEnvDs id us loc mod_and_grp env warns
- = (case (lookupIdEnv env id) of
- Nothing -> id
- Just xx -> xx,
- warns)
+dsLookupGlobalValue :: Name -> DsM Id
+dsLookupGlobalValue name us genv loc mod_and_grp warns
+ = case maybeWiredInIdName name of
+ Just id -> (id, warns)
+ Nothing -> (lookupWithDefaultUFM genv def name, warns)
+ where
+ def = pprPanic "tcLookupGlobalValue:" (ppr name)
\end{code}
+
%************************************************************************
%* *
%* type synonym EquationInfo and access functions for its pieces *
projects / ghc-hetmet.git / blobdiff