%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1995
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
%
-\section[DesugarMonad]{@DesugarMonad@: monadery used in desugaring}
+\section[DsMonad]{@DsMonad@: monadery used in desugaring}
\begin{code}
#include "HsVersions.h"
duplicateLocalDs, newSysLocalDs, newSysLocalsDs,
newFailLocalDs,
getSrcLocDs, putSrcLocDs,
- getSwitchCheckerDs, ifSwitchSetDs,
getModuleAndGroupDs,
extendEnvDs, lookupEnvDs, lookupEnvWithDefaultDs,
DsIdEnv(..),
lookupId,
dsShadowError,
- DsMatchContext(..), DsMatchKind(..), pprDsWarnings,
-
-#ifdef DPH
- listDs,
-#endif
-
- -- and to make the interface self-sufficient...
- Id, DataCon(..), SrcLoc, TyVar, TyVarTemplate, UniType, TauType(..),
- ThetaType(..), SigmaType(..), SplitUniqSupply, UniqSM(..),
- PlainCoreExpr(..), CoreExpr, GlobalSwitch, SwitchResult
-
- IF_ATTACK_PRAGMAS(COMMA lookupUFM COMMA lookupIdEnv)
- IF_ATTACK_PRAGMAS(COMMA mkIdWithNewUniq COMMA mkSysLocal)
- IF_ATTACK_PRAGMAS(COMMA unpackSrcLoc COMMA mkUniqueSupplyGrimily)
- IF_ATTACK_PRAGMAS(COMMA mkUniqueGrimily)
- IF_ATTACK_PRAGMAS(COMMA splitUniqSupply COMMA getSUnique)
+ DsMatchContext(..), DsMatchKind(..), pprDsWarnings
) where
-import AbsSyn
-import AbsUniType ( cloneTyVarFromTemplate, cloneTyVar,
- TyVar, TyVarTemplate, UniType, TauType(..),
- ThetaType(..), SigmaType(..), Class
- IF_ATTACK_PRAGMAS(COMMA cmpTyVar)
- )
-import Bag
-import CmdLineOpts -- ( GlobalSwitch(..), SwitchResult(..), switchIsOn )
-import Id ( mkIdWithNewUniq, mkSysLocal, Id, DataCon(..) )
-import IdEnv -- ( mkIdEnv, IdEnv )
-import Maybes ( assocMaybe, Maybe(..) )
-import Outputable
-import PlainCore
+import Ubiq
+
+import Bag ( emptyBag, snocBag, bagToList )
+import CmdLineOpts ( opt_SccGroup )
+import CoreSyn ( CoreExpr(..) )
+import CoreUtils ( substCoreExpr )
+import HsSyn ( OutPat )
+import Id ( mkSysLocal, lookupIdEnv, growIdEnvList, GenId, IdEnv(..) )
+import PprType ( GenType, GenTyVar )
+import PprStyle ( PprStyle(..) )
import Pretty
import SrcLoc ( unpackSrcLoc, mkUnknownSrcLoc, SrcLoc )
-import TyVarEnv -- ( nullTyVarEnv, TyVarEnv )
-import SplitUniq
-import Unique
-import Util
+import TcHsSyn ( TypecheckedPat(..) )
+import TyVar ( nullTyVarEnv, GenTyVar )
+import Unique ( Unique{-instances-} )
+import UniqSupply ( splitUniqSupply, getUnique, getUniques,
+ mapUs, thenUs, returnUs, UniqSM(..) )
+import Unique ( Unique )
+import Util ( assoc, mapAccumL, zipWithEqual, panic )
infixr 9 `thenDs`
+
+cloneTyVar = panic "DsMonad.cloneTyVar"
+cloneTyVarFromTemplate = panic "DsMonad.cloneTyVarFromTemplate"
+mkIdWithNewUniq = panic "DsMonad.mkIdWithNewUniq"
\end{code}
Now the mondo monad magic (yes, @DsM@ is a silly name)---carry around
presumably include source-file location information:
\begin{code}
type DsM result =
- SplitUniqSupply
- -> SrcLoc -- to put in pattern-matching error msgs
- -> (GlobalSwitch -> SwitchResult) -- so we can consult global switches
- -> (FAST_STRING, FAST_STRING) -- "module"+"group" : for SCC profiling
+ UniqSupply
+ -> SrcLoc -- to put in pattern-matching error msgs
+ -> (FAST_STRING, FAST_STRING) -- "module"+"group" : for SCC profiling
-> DsIdEnv
-> DsWarnings
-> (result, DsWarnings)
-type DsWarnings = Bag DsMatchContext -- The desugarer reports matches which are
+type DsWarnings = Bag DsMatchContext -- The desugarer reports matches which are
-- completely shadowed
-
-#ifdef __GLASGOW_HASKELL__
{-# INLINE andDs #-}
{-# INLINE thenDs #-}
{-# INLINE returnDs #-}
-#endif
-- initDs returns the UniqSupply out the end (not just the result)
-initDs :: SplitUniqSupply
+initDs :: UniqSupply
-> DsIdEnv
- -> (GlobalSwitch -> SwitchResult)
-> FAST_STRING -- module name: for profiling; (group name: from switches)
-> DsM a
-> (a, DsWarnings)
-initDs init_us env sw_chkr mod_name action
- = action init_us mkUnknownSrcLoc sw_chkr module_and_group env emptyBag
+initDs init_us env mod_name action
+ = action init_us mkUnknownSrcLoc module_and_group env emptyBag
where
module_and_group = (mod_name, grp_name)
- grp_name = case (stringSwitchSet sw_chkr SccGroup) of
- Just xx -> _PK_ xx
+ grp_name = case opt_SccGroup of
+ Just xx -> xx
Nothing -> mod_name -- default: module name
thenDs :: DsM a -> (a -> DsM b) -> DsM b
andDs :: (a -> a -> a) -> DsM a -> DsM a -> DsM a
-thenDs expr cont us loc sw_chkr mod_and_grp env warns
- = case splitUniqSupply us of { (s1, s2) ->
- case (expr s1 loc sw_chkr mod_and_grp env warns) of { (result, warns1) ->
- cont result s2 loc sw_chkr mod_and_grp env warns1}}
+thenDs m1 m2 us loc mod_and_grp env 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}}
-andDs combiner m1 m2 us loc sw_chkr mod_and_grp env warns
- = case splitUniqSupply us of { (s1, s2) ->
- case (m1 s1 loc sw_chkr mod_and_grp env warns) of { (result1, warns1) ->
- case (m2 s2 loc sw_chkr mod_and_grp env warns1) of { (result2, warns2) ->
+andDs combiner m1 m2 us loc mod_and_grp env 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) ->
(combiner result1 result2, warns2) }}}
returnDs :: a -> DsM a
-returnDs result us loc sw_chkr mod_and_grp env warns = (result, warns)
+returnDs result us loc mod_and_grp env warns = (result, warns)
listDs :: [DsM a] -> DsM [a]
listDs [] = returnDs []
= f x y `thenDs` \ r ->
zipWithDs f xs ys `thenDs` \ rs ->
returnDs (r:rs)
+-- Note: crashes if lists not equal length (like zipWithEqual)
\end{code}
And all this mysterious stuff is so we can occasionally reach out and
functions are defined with it. The difference in name-strings makes
it easier to read debugging output.
\begin{code}
-newLocalDs :: FAST_STRING -> UniType -> DsM Id
-newLocalDs nm ty us loc sw_chkr mod_and_grp env warns
- = case (getSUnique us) of { assigned_uniq ->
+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 = newLocalDs SLIT("ds")
newFailLocalDs = newLocalDs SLIT("fail")
duplicateLocalDs :: Id -> DsM Id
-duplicateLocalDs old_local us loc sw_chkr mod_and_grp env warns
- = case (getSUnique us) of { assigned_uniq ->
+duplicateLocalDs old_local us loc mod_and_grp env warns
+ = case (getUnique us) of { assigned_uniq ->
(mkIdWithNewUniq old_local assigned_uniq, warns) }
cloneTyVarsDs :: [TyVar] -> DsM [TyVar]
-cloneTyVarsDs tyvars us loc sw_chkr mod_and_grp env warns
- = case (getSUniques (length tyvars) us) of { uniqs ->
- (zipWith cloneTyVar tyvars uniqs, warns) }
+cloneTyVarsDs tyvars us loc mod_and_grp env warns
+ = case (getUniques (length tyvars) us) of { uniqs ->
+ (zipWithEqual cloneTyVar tyvars uniqs, warns) }
\end{code}
\begin{code}
-newTyVarsDs :: [TyVarTemplate] -> DsM [TyVar]
+newTyVarsDs :: [TyVar] -> DsM [TyVar]
-newTyVarsDs tyvar_tmpls us loc sw_chkr mod_and_grp env warns
- = case (getSUniques (length tyvar_tmpls) us) of { uniqs ->
- (zipWith cloneTyVarFromTemplate tyvar_tmpls uniqs, warns) }
+newTyVarsDs tyvar_tmpls us loc mod_and_grp env warns
+ = case (getUniques (length tyvar_tmpls) us) of { uniqs ->
+ (zipWithEqual cloneTyVarFromTemplate 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 sw_chkr mod_and_grp env warns
- = let
- us_to_use = mkUniqueSupplyGrimily us
- in
- (snd (u_action us_to_use), warns)
+uniqSMtoDsM u_action us loc mod_and_grp env warns
+ = (u_action us, warns)
getSrcLocDs :: DsM (String, String)
-getSrcLocDs us loc sw_chkr mod_and_grp env warns
+getSrcLocDs us loc mod_and_grp env warns
= case (unpackSrcLoc loc) of { (x,y) ->
((_UNPK_ x, _UNPK_ y), warns) }
putSrcLocDs :: SrcLoc -> DsM a -> DsM a
-putSrcLocDs new_loc expr us old_loc sw_chkr mod_and_grp env warns
- = expr us new_loc sw_chkr mod_and_grp env warns
+putSrcLocDs new_loc expr us old_loc mod_and_grp env warns
+ = expr us new_loc mod_and_grp env warns
dsShadowError :: DsMatchContext -> DsM ()
-dsShadowError cxt us loc sw_chkr mod_and_grp env warns
+dsShadowError cxt us loc mod_and_grp env warns
= ((), warns `snocBag` cxt)
\end{code}
\begin{code}
-getSwitchCheckerDs :: DsM (GlobalSwitch -> Bool)
-getSwitchCheckerDs us loc sw_chkr mod_and_grp env warns
- = (switchIsOn sw_chkr, warns)
-
-ifSwitchSetDs :: GlobalSwitch -> DsM a -> DsM a -> DsM a
-ifSwitchSetDs switch then_ else_ us loc sw_chkr mod_and_grp env warns
- = (if switchIsOn sw_chkr switch then then_ else else_)
- us loc sw_chkr mod_and_grp env warns
-
getModuleAndGroupDs :: DsM (FAST_STRING, FAST_STRING)
-getModuleAndGroupDs us loc sw_chkr mod_and_grp env warns
+getModuleAndGroupDs us loc mod_and_grp env warns
= (mod_and_grp, warns)
\end{code}
\begin{code}
-type DsIdEnv = IdEnv PlainCoreExpr
+type DsIdEnv = IdEnv CoreExpr
-extendEnvDs :: [(Id, PlainCoreExpr)] -> DsM a -> DsM a
+extendEnvDs :: [(Id, CoreExpr)] -> DsM a -> DsM a
-extendEnvDs pairs expr us loc sw_chkr mod_and_grp old_env warns
+extendEnvDs pairs then_do us loc mod_and_grp old_env warns
= case splitUniqSupply us of { (s1, s2) ->
- case (mapAccumL subst s1 pairs) of { (_, revised_pairs) ->
- expr s2 loc sw_chkr mod_and_grp (growIdEnvList old_env revised_pairs) warns
- }}
+ let
+ revised_pairs = subst_all pairs s1
+ in
+ then_do s2 loc mod_and_grp (growIdEnvList old_env revised_pairs) warns
+ }
where
- subst us (v, expr)
- = case splitUniqSupply us of { (s1, s2) ->
- let
- us_to_use = mkUniqueSupplyGrimily s1
- in
- case (substCoreExpr us_to_use old_env nullTyVarEnv expr) of { (_, expr2) ->
- (s2, (v, expr2)) }}
-
-lookupEnvDs :: Id -> DsM (Maybe PlainCoreExpr)
-lookupEnvDs id us loc sw_chkr mod_and_grp env warns
+ subst_all pairs = mapUs subst pairs
+
+ subst (v, expr)
+ = substCoreExpr old_env nullTyVarEnv expr `thenUs` \ new_expr ->
+ returnUs (v, new_expr)
+
+lookupEnvDs :: Id -> DsM (Maybe CoreExpr)
+lookupEnvDs id us loc mod_and_grp env warns
= (lookupIdEnv env id, warns)
-- Note: we don't assert anything about the Id
-- being looked up. There's not really anything
-- much to say about it. (WDP 94/06)
-lookupEnvWithDefaultDs :: Id -> PlainCoreExpr -> DsM PlainCoreExpr
-lookupEnvWithDefaultDs id deflt us loc sw_chkr mod_and_grp env warns
+lookupEnvWithDefaultDs :: Id -> CoreExpr -> DsM CoreExpr
+lookupEnvWithDefaultDs id deflt us loc mod_and_grp env warns
= (case (lookupIdEnv env id) of
Nothing -> deflt
Just xx -> xx,
projects / ghc-hetmet.git / blobdiff