X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Ftypecheck%2FTcEnv.lhs;h=3c63d34acbaaf99e02e5c25fee4c41c1059e7eb6;hb=41d098e37b12157f7dca5e373e245b27d01baf3a;hp=290db74634fe6f891d5d5320699ad8b367424c38;hpb=7b0181919416d8f04324575b7e17031ca692f5b0;p=ghc-hetmet.git diff --git a/ghc/compiler/typecheck/TcEnv.lhs b/ghc/compiler/typecheck/TcEnv.lhs index 290db74..3c63d34 100644 --- a/ghc/compiler/typecheck/TcEnv.lhs +++ b/ghc/compiler/typecheck/TcEnv.lhs @@ -1,212 +1,214 @@ \begin{code} -#include "HsVersions.h" - module TcEnv( - TcEnv, + TcId, TcIdSet, tcInstId, + tcLookupDataCon, + + TcEnv, ValueEnv, TcTyThing(..), - initEnv, getEnv_LocalIds, getEnv_TyCons, getEnv_Classes, + initEnv, getEnvTyCons, getEnvClasses, - tcTyVarScope, tcTyVarScopeGivenKinds, tcLookupTyVar, + tcExtendTyVarEnv, tcExtendTyVarEnvForMeths, tcExtendTypeEnv, tcGetInScopeTyVars, - tcExtendTyConEnv, tcLookupTyCon, tcLookupTyConByKey, - tcExtendClassEnv, tcLookupClass, tcLookupClassByKey, + tcLookupTy, + tcLookupTyCon, tcLookupTyConByKey, + tcLookupClass, tcLookupClassByKey, tcExtendGlobalValEnv, tcExtendLocalValEnv, - tcLookupLocalValue, tcLookupLocalValueOK, tcLookupLocalValueByKey, - tcLookupGlobalValue, tcLookupGlobalValueByKey, + tcGetValueEnv, tcSetValueEnv, + tcAddImportedIdInfo, - newMonoIds, newLocalIds, newLocalId, - tcGetGlobalTyVars - ) where + tcLookupValue, tcLookupValueMaybe, + tcLookupValueByKey, tcLookupValueByKeyMaybe, + explicitLookupValueByKey, explicitLookupValue, + newLocalId, newSpecPragmaId, + tcGetGlobalTyVars, tcExtendGlobalTyVars, -import Ubiq -import TcMLoop -- for paranoia checking + badCon, badPrimOp + ) where -import Id ( Id(..), GenId, idType, mkUserLocal ) -import TcHsSyn ( TcIdBndr(..), TcIdOcc(..) ) -import TcKind ( TcKind, newKindVars, tcDefaultKind, kindToTcKind ) -import TcType ( TcType(..), TcMaybe, TcTyVar(..), TcTyVarSet(..), - newTyVarTys, tcInstTyVars, tcInstType, zonkTcTyVars +#include "HsVersions.h" + +import HsTypes ( HsTyVar, getTyVarName ) +import Id ( mkUserLocal, isDataConId_maybe ) +import MkId ( mkSpecPragmaId ) +import Var ( TyVar, Id, setVarName, + idType, setIdInfo, idInfo, tyVarKind + ) +import TcType ( TcType, TcTyVar, TcTyVarSet, TcThetaType, + tcInstTyVars, zonkTcTyVars, + TcKind, kindToTcKind + ) +import VarEnv +import VarSet +import Type ( Kind, superKind, + tyVarsOfType, tyVarsOfTypes, mkTyVarTy, substTy, + splitForAllTys, splitRhoTy, splitFunTys, substTopTy, + splitAlgTyConApp_maybe, getTyVar ) -import TyVar ( mkTyVar, getTyVarKind, unionTyVarSets, emptyTyVarSet ) -import Type ( tyVarsOfTypes ) -import TyCon ( TyCon, Arity(..), tyConKind, synTyConArity ) -import Class ( Class(..), GenClass, getClassSig ) +import DataCon ( DataCon ) +import TyCon ( TyCon, tyConKind, tyConArity, isSynTyCon ) +import Class ( Class ) import TcMonad -import Name ( getOccName, getSrcLoc, Name{-instance NamedThing-} ) -import PprStyle -import Pretty -import RnHsSyn ( RnName(..) ) -import Type ( splitForAllTy ) -import Unique ( Unique ) -import UniqFM -import Util ( zipWithEqual, zipWith3Equal, zipLazy, panic, pprPanic ) +import BasicTypes ( Arity ) +import IdInfo ( noIdInfo ) +import Name ( Name, OccName, nameOccName, getSrcLoc, + maybeWiredInTyConName, maybeWiredInIdName, isLocallyDefined, + NamedThing(..) + ) +import Unique ( pprUnique10, Unique, Uniquable(..) ) +import FiniteMap ( lookupFM, addToFM ) +import UniqFM +import Unique ( Uniquable(..) ) +import Util ( zipEqual, zipWith3Equal, mapAccumL ) +import Bag ( bagToList ) +import Maybes ( maybeToBool ) +import SrcLoc ( SrcLoc ) +import FastString ( FastString ) +import Outputable \end{code} -Data type declarations -~~~~~~~~~~~~~~~~~~~~~ +%************************************************************************ +%* * +\subsection{TcId} +%* * +%************************************************************************ -\begin{code} -data TcEnv s = TcEnv - (TyVarEnv s) - (TyConEnv s) - (ClassEnv s) - (ValueEnv Id) -- Globals - (ValueEnv (TcIdBndr s)) -- Locals - (MutableVar s (TcTyVarSet s)) -- Free type variables of locals - -- ...why mutable? see notes with tcGetGlobalTyVars - -type TyVarEnv s = UniqFM (TcKind s, TyVar) -type TyConEnv s = UniqFM (TcKind s, Maybe Arity, TyCon) -- Arity present for Synonyms only -type ClassEnv s = UniqFM (TcKind s, Class) -type ValueEnv id = UniqFM id - -initEnv :: MutableVar s (TcTyVarSet s) -> TcEnv s -initEnv mut = TcEnv emptyUFM emptyUFM emptyUFM emptyUFM emptyUFM mut - -getEnv_LocalIds (TcEnv _ _ _ _ ls _) = eltsUFM ls -getEnv_TyCons (TcEnv _ ts _ _ _ _) = [tycon | (_, _, tycon) <- eltsUFM ts] -getEnv_Classes (TcEnv _ _ cs _ _ _) = [clas | (_, clas) <- eltsUFM cs] -\end{code} - -Making new TcTyVars, with knot tying! -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -\begin{code} -tcTyVarScopeGivenKinds - :: [Name] -- Names of some type variables - -> [TcKind s] - -> ([TyVar] -> TcM s a) -- Thing to type check in their scope - -> TcM s a -- Result - -tcTyVarScopeGivenKinds names kinds thing_inside - = fixTc (\ ~(rec_tyvars, _) -> - -- Ok to look at names, kinds, but not tyvars! - - tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) -> - let - tve' = addListToUFM tve (names `zip` (kinds `zipLazy` rec_tyvars)) - in - tcSetEnv (TcEnv tve' tce ce gve lve gtvs) - (thing_inside rec_tyvars) `thenTc` \ result -> - - -- Get the tyvar's Kinds from their TcKinds - mapNF_Tc tcDefaultKind kinds `thenNF_Tc` \ kinds' -> - - -- Construct the real TyVars - let - tyvars = zipWithEqual mk_tyvar names kinds' - mk_tyvar name kind = mkTyVar name (uniqueOf name) kind - in - returnTc (tyvars, result) - ) `thenTc` \ (_,result) -> - returnTc result - -tcTyVarScope names thing_inside - = newKindVars (length names) `thenNF_Tc` \ kinds -> - tcTyVarScopeGivenKinds names kinds thing_inside -\end{code} - - -The Kind, TyVar, Class and TyCon envs -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - -Extending the environments. Notice the uses of @zipLazy@, which makes sure -that the knot-tied TyVars, TyCons and Classes aren't looked at too early. \begin{code} -tcExtendTyConEnv :: [(RnName,Maybe Arity)] -> [TyCon] -> TcM s r -> TcM s r - -tcExtendTyConEnv names_w_arities tycons scope - = newKindVars (length names_w_arities) `thenNF_Tc` \ kinds -> - tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) -> +type TcId = Id -- Type may be a TcType +type TcIdSet = IdSet + +tcLookupDataCon :: Name -> TcM s (DataCon, [TcType], TcType) +tcLookupDataCon con_name + = tcLookupValue con_name `thenNF_Tc` \ con_id -> + case isDataConId_maybe con_id of { + Nothing -> failWithTc (badCon con_id); + Just data_con -> + + tcInstId con_id `thenNF_Tc` \ (_, _, con_tau) -> + -- Ignore the con_theta; overloaded constructors only + -- behave differently when called, not when used for + -- matching. let - tce' = addListToUFM tce [ (name, (kind, arity, tycon)) - | ((name,arity), (kind,tycon)) <- names_w_arities `zip` - (kinds `zipLazy` tycons) - ] + (arg_tys, result_ty) = splitFunTys con_tau in - tcSetEnv (TcEnv tve tce' ce gve lve gtvs) scope `thenTc` \ result -> - mapNF_Tc tcDefaultKind kinds `thenNF_Tc_` - returnTc result - - -tcExtendClassEnv :: [RnName] -> [Class] -> TcM s r -> TcM s r -tcExtendClassEnv names classes scope - = newKindVars (length names) `thenNF_Tc` \ kinds -> - tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) -> + ASSERT( maybeToBool (splitAlgTyConApp_maybe result_ty) ) + returnTc (data_con, arg_tys, result_ty) } + +-- A useful function that takes an occurrence of a global thing +-- and instantiates its type with fresh type variables +tcInstId :: Id + -> NF_TcM s ([TcTyVar], -- It's instantiated type + TcThetaType, -- + TcType) -- +tcInstId id + = let + (tyvars, rho) = splitForAllTys (idType id) + in + tcInstTyVars tyvars `thenNF_Tc` \ (tyvars', arg_tys, tenv) -> let - ce' = addListToUFM ce (names `zip` (kinds `zipLazy` classes)) + rho' = substTopTy tenv rho + (theta', tau') = splitRhoTy rho' in - tcSetEnv (TcEnv tve tce ce' gve lve gtvs) scope `thenTc` \ result -> - mapNF_Tc tcDefaultKind kinds `thenNF_Tc_` - returnTc result + returnNF_Tc (tyvars', theta', tau') \end{code} -Looking up in the environments. +%************************************************************************ +%* * +\subsection{TcEnv} +%* * +%************************************************************************ + +Data type declarations +~~~~~~~~~~~~~~~~~~~~~ \begin{code} -tcLookupTyVar name - = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) -> - returnNF_Tc (lookupWithDefaultUFM tve (panic "tcLookupTyVar") name) +data TcEnv = TcEnv + TypeEnv + ValueEnv + (TcTyVarSet, -- The in-scope TyVars + TcRef TcTyVarSet) -- Free type variables of the value env + -- ...why mutable? see notes with tcGetGlobalTyVars + -- Includes the in-scope tyvars +type NameEnv val = UniqFM val -- Keyed by Names -tcLookupTyCon (WiredInTyCon tc) -- wired in tycons - = returnNF_Tc (kindToTcKind (tyConKind tc), synTyConArity tc, tc) +type TypeEnv = NameEnv (TcKind, Maybe Arity, TcTyThing) +type ValueEnv = NameEnv Id -tcLookupTyCon name - = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) -> - returnNF_Tc (lookupWithDefaultUFM tce (panic "tcLookupTyCon") name) - -tcLookupTyConByKey uniq - = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) -> - let - (kind, arity, tycon) = lookupWithDefaultUFM_Directly tce - (pprPanic "tcLookupTyCon:" (ppr PprDebug uniq)) - uniq - in - returnNF_Tc tycon +data TcTyThing = ATyVar TcTyVar -- Mutable only so that the kind can be mutable + -- if the kind is mutable, the tyvar must be so that + -- zonking works + | ATyCon TyCon + | AClass Class -tcLookupClass name - = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) -> - returnNF_Tc (lookupWithDefaultUFM ce (panic "tcLookupClass") name) -tcLookupClassByKey uniq - = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) -> - let - (kind, clas) = lookupWithDefaultUFM_Directly ce - (pprPanic "tcLookupClas:" (ppr PprDebug uniq)) - uniq - in - returnNF_Tc clas +initEnv :: TcRef TcTyVarSet -> TcEnv +initEnv mut = TcEnv emptyUFM emptyUFM (emptyVarSet, mut) + +getEnvTyCons (TcEnv te _ _) = [tc | (_, _, ATyCon tc) <- eltsUFM te] +getEnvClasses (TcEnv te _ _) = [cl | (_, _, AClass cl) <- eltsUFM te] \end{code} +The TypeEnv +~~~~~~~~~~~~ +Extending the type environment. -Extending and consulting the value environment -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ \begin{code} -tcExtendGlobalValEnv ids scope - = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) -> +tcExtendTyVarEnv :: [TyVar] -> TcM s r -> TcM s r +tcExtendTyVarEnv tyvars scope + = tcGetEnv `thenNF_Tc` \ (TcEnv te ve (in_scope_tvs, gtvs)) -> let - gve' = addListToUFM_Directly gve [(uniqueOf id, id) | id <- ids] + extend_list = [ (getName tv, (kindToTcKind (tyVarKind tv), Nothing, ATyVar tv)) + | tv <- tyvars + ] + te' = addListToUFM te extend_list + new_tv_set = mkVarSet tyvars + in_scope_tvs' = in_scope_tvs `unionVarSet` new_tv_set in - tcSetEnv (TcEnv tve tce ce gve' lve gtvs) scope - -tcExtendLocalValEnv names ids scope - = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) -> - tcReadMutVar gtvs `thenNF_Tc` \ global_tvs -> + -- It's important to add the in-scope tyvars to the global tyvar set + -- as well. Consider + -- f (x::r) = let g y = y::r in ... + -- Here, g mustn't be generalised. This is also important during + -- class and instance decls, when we mustn't generalise the class tyvars + -- when typechecking the methods. + tc_extend_gtvs gtvs new_tv_set `thenNF_Tc` \ gtvs' -> + tcSetEnv (TcEnv te' ve (in_scope_tvs', gtvs')) scope + +-- This variant, tcExtendTyVarEnvForMeths, takes *two* bunches of tyvars: +-- the signature tyvars contain the original names +-- the instance tyvars are what those names should be mapped to +-- It's needed when typechecking the method bindings of class and instance decls +-- It does *not* extend the global tyvars; tcMethodBind does that for itself + +tcExtendTyVarEnvForMeths :: [TyVar] -> [TcTyVar] -> TcM s r -> TcM s r +tcExtendTyVarEnvForMeths sig_tyvars inst_tyvars thing_inside + = tcGetEnv `thenNF_Tc` \ (TcEnv te ve gtvs) -> let - lve' = addListToUFM lve (names `zip` ids) - extra_global_tyvars = tyVarsOfTypes (map idType ids) - new_global_tyvars = global_tvs `unionTyVarSets` extra_global_tyvars + te' = addListToUFM te stuff in - tcNewMutVar new_global_tyvars `thenNF_Tc` \ gtvs' -> + tcSetEnv (TcEnv te' ve gtvs) thing_inside + where + stuff = [ (getName sig_tv, (kindToTcKind (tyVarKind inst_tv), Nothing, ATyVar inst_tv)) + | (sig_tv, inst_tv) <- zipEqual "tcMeth" sig_tyvars inst_tyvars + ] + +tcExtendGlobalTyVars extra_global_tvs scope + = tcGetEnv `thenNF_Tc` \ (TcEnv te ve (in_scope,gtvs)) -> + tc_extend_gtvs gtvs extra_global_tvs `thenNF_Tc` \ gtvs' -> + tcSetEnv (TcEnv te ve (in_scope,gtvs')) scope - tcSetEnv (TcEnv tve tce ce gve lve' gtvs') scope +tc_extend_gtvs gtvs extra_global_tvs + = tcReadMutVar gtvs `thenNF_Tc` \ global_tvs -> + let + new_global_tyvars = global_tvs `unionVarSet` extra_global_tvs + in + tcNewMutVar new_global_tyvars \end{code} @tcGetGlobalTyVars@ returns a fully-zonked set of tyvars free in the environment. @@ -214,98 +216,215 @@ To improve subsequent calls to the same function it writes the zonked set back i the environment. \begin{code} -tcGetGlobalTyVars :: NF_TcM s (TcTyVarSet s) +tcGetGlobalTyVars :: NF_TcM s TcTyVarSet tcGetGlobalTyVars - = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) -> - tcReadMutVar gtvs `thenNF_Tc` \ global_tvs -> - zonkTcTyVars global_tvs `thenNF_Tc` \ global_tvs' -> - tcWriteMutVar gtvs global_tvs' `thenNF_Tc_` + = tcGetEnv `thenNF_Tc` \ (TcEnv te ve (_,gtvs)) -> + tcReadMutVar gtvs `thenNF_Tc` \ global_tvs -> + zonkTcTyVars (varSetElems global_tvs) `thenNF_Tc` \ global_tys' -> + let + global_tvs' = (tyVarsOfTypes global_tys') + in + tcWriteMutVar gtvs global_tvs' `thenNF_Tc_` returnNF_Tc global_tvs' + +tcGetInScopeTyVars :: NF_TcM s [TcTyVar] +tcGetInScopeTyVars + = tcGetEnv `thenNF_Tc` \ (TcEnv te ve (in_scope_tvs, gtvs)) -> + returnNF_Tc (varSetElems in_scope_tvs) \end{code} -\begin{code} -tcLookupLocalValue :: RnName -> NF_TcM s (Maybe (TcIdBndr s)) -tcLookupLocalValue name - = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) -> - returnNF_Tc (lookupUFM lve name) -tcLookupLocalValueByKey :: Unique -> NF_TcM s (Maybe (TcIdBndr s)) -tcLookupLocalValueByKey uniq - = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) -> - returnNF_Tc (lookupUFM_Directly lve uniq) +Type constructors and classes -tcLookupLocalValueOK :: String -> RnName -> NF_TcM s (TcIdBndr s) -tcLookupLocalValueOK err name - = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) -> - returnNF_Tc (lookupWithDefaultUFM lve (panic err) name) +\begin{code} +tcExtendTypeEnv :: [(Name, (TcKind, Maybe Arity, TcTyThing))] -> TcM s r -> TcM s r +tcExtendTypeEnv bindings scope + = ASSERT( null [tv | (_, (_,_,ATyVar tv)) <- bindings] ) + -- Not for tyvars; use tcExtendTyVarEnv + tcGetEnv `thenNF_Tc` \ (TcEnv te ve gtvs) -> + let + te' = addListToUFM te bindings + in + tcSetEnv (TcEnv te' ve gtvs) scope +\end{code} -tcLookupGlobalValue :: RnName -> NF_TcM s Id +Looking up in the environments. -tcLookupGlobalValue (WiredInId id) -- wired in ids - = returnNF_Tc id +\begin{code} +tcLookupTy :: Name -> NF_TcM s (TcKind, Maybe Arity, TcTyThing) +tcLookupTy name + = tcGetEnv `thenNF_Tc` \ (TcEnv te ve gtvs) -> + case lookupUFM te name of { + Just thing -> returnNF_Tc thing ; + Nothing -> + + case maybeWiredInTyConName name of + Just tc -> returnNF_Tc (kindToTcKind (tyConKind tc), maybe_arity, ATyCon tc) + where + maybe_arity | isSynTyCon tc = Just (tyConArity tc) + | otherwise = Nothing + + Nothing -> -- This can happen if an interface-file + -- unfolding is screwed up + failWithTc (tyNameOutOfScope name) + } + +tcLookupClass :: Name -> NF_TcM s Class +tcLookupClass name + = tcLookupTy name `thenNF_Tc` \ (_, _, AClass clas) -> + returnNF_Tc clas -tcLookupGlobalValue name - = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) -> - returnNF_Tc (lookupWithDefaultUFM gve def name) - where -#ifdef DEBUG - def = pprPanic "tcLookupGlobalValue:" (ppr PprDebug name) -#else - def = panic "tcLookupGlobalValue" -#endif - -tcLookupGlobalValueByKey :: Unique -> NF_TcM s Id -tcLookupGlobalValueByKey uniq - = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) -> - returnNF_Tc (lookupWithDefaultUFM_Directly gve def uniq) - where -#ifdef DEBUG - def = pprPanic "tcLookupGlobalValueByKey:" (ppr PprDebug uniq) -#else - def = panic "tcLookupGlobalValueByKey" -#endif +tcLookupTyCon :: Name -> NF_TcM s TyCon +tcLookupTyCon name + = tcLookupTy name `thenNF_Tc` \ (_, _, ATyCon tycon) -> + returnNF_Tc tycon +tcLookupClassByKey :: Unique -> NF_TcM s Class +tcLookupClassByKey key + = tcGetEnv `thenNF_Tc` \ (TcEnv te ve gtvs) -> + case lookupUFM_Directly te key of + Just (_, _, AClass cl) -> returnNF_Tc cl + other -> pprPanic "tcLookupClassByKey:" (pprUnique10 key) + +tcLookupTyConByKey :: Unique -> NF_TcM s TyCon +tcLookupTyConByKey key + = tcGetEnv `thenNF_Tc` \ (TcEnv te ve gtvs) -> + case lookupUFM_Directly te key of + Just (_, _, ATyCon tc) -> returnNF_Tc tc + other -> pprPanic "tcLookupTyConByKey:" (pprUnique10 key) \end{code} -Constructing new Ids -~~~~~~~~~~~~~~~~~~~~ -\begin{code} -newMonoIds :: [RnName] -> Kind -> ([TcIdBndr s] -> TcM s a) -> TcM s a -newMonoIds names kind m - = newTyVarTys no_of_names kind `thenNF_Tc` \ tys -> - tcGetUniques no_of_names `thenNF_Tc` \ uniqs -> - let - new_ids = zipWith3Equal mk_id names uniqs tys +%************************************************************************ +%* * +\subsection{The value environment} +%* * +%************************************************************************ - mk_id name uniq ty - = let - name_str = case (getOccName name) of { Unqual n -> n } - in - mkUserLocal name_str uniq ty (getSrcLoc name) +\begin{code} +tcExtendGlobalValEnv :: [Id] -> TcM s a -> TcM s a +tcExtendGlobalValEnv ids scope + = tcGetEnv `thenNF_Tc` \ (TcEnv te ve gtvs) -> + let + ve' = addListToUFM_Directly ve [(getUnique id, id) | id <- ids] in - tcExtendLocalValEnv names new_ids (m new_ids) - where - no_of_names = length names - -newLocalId :: FAST_STRING -> TcType s -> NF_TcM s (TcIdOcc s) -newLocalId name ty - = tcGetSrcLoc `thenNF_Tc` \ loc -> - tcGetUnique `thenNF_Tc` \ uniq -> - returnNF_Tc (TcId (mkUserLocal name uniq ty loc)) - -newLocalIds :: [FAST_STRING] -> [TcType s] -> NF_TcM s [TcIdOcc s] -newLocalIds names tys - = tcGetSrcLoc `thenNF_Tc` \ loc -> - tcGetUniques (length names) `thenNF_Tc` \ uniqs -> + tcSetEnv (TcEnv te ve' gtvs) scope + +tcExtendLocalValEnv :: [(Name,TcId)] -> TcM s a -> TcM s a +tcExtendLocalValEnv names_w_ids scope + = tcGetEnv `thenNF_Tc` \ (TcEnv te ve (in_scope_tvs,gtvs)) -> + tcReadMutVar gtvs `thenNF_Tc` \ global_tvs -> let - new_ids = zipWith3Equal mk_id names uniqs tys - mk_id name uniq ty = TcId (mkUserLocal name uniq ty loc) + ve' = addListToUFM ve names_w_ids + extra_global_tyvars = tyVarsOfTypes (map (idType . snd) names_w_ids) in - returnNF_Tc new_ids + tc_extend_gtvs gtvs extra_global_tyvars `thenNF_Tc` \ gtvs' -> + tcSetEnv (TcEnv te ve' (in_scope_tvs,gtvs')) scope +\end{code} + + +\begin{code} +tcLookupValue :: Name -> NF_TcM s Id -- Panics if not found +tcLookupValue name + = case maybeWiredInIdName name of + Just id -> returnNF_Tc id + Nothing -> tcGetEnv `thenNF_Tc` \ (TcEnv te ve gtvs) -> + returnNF_Tc (lookupWithDefaultUFM ve def name) + where + def = pprPanic "tcLookupValue:" (ppr name) + +tcLookupValueMaybe :: Name -> NF_TcM s (Maybe Id) +tcLookupValueMaybe name + = case maybeWiredInIdName name of + Just id -> returnNF_Tc (Just id) + Nothing -> tcGetEnv `thenNF_Tc` \ (TcEnv te ve gtvs) -> + returnNF_Tc (lookupUFM ve name) + +tcLookupValueByKey :: Unique -> NF_TcM s Id -- Panics if not found +tcLookupValueByKey key + = tcGetEnv `thenNF_Tc` \ (TcEnv te ve gtvs) -> + returnNF_Tc (explicitLookupValueByKey ve key) + +tcLookupValueByKeyMaybe :: Unique -> NF_TcM s (Maybe Id) +tcLookupValueByKeyMaybe key + = tcGetEnv `thenNF_Tc` \ (TcEnv te ve gtvs) -> + returnNF_Tc (lookupUFM_Directly ve key) + +tcGetValueEnv :: NF_TcM s ValueEnv +tcGetValueEnv + = tcGetEnv `thenNF_Tc` \ (TcEnv te ve gtvs) -> + returnNF_Tc ve + +tcSetValueEnv :: ValueEnv -> TcM s a -> TcM s a +tcSetValueEnv ve scope + = tcGetEnv `thenNF_Tc` \ (TcEnv te _ gtvs) -> + tcSetEnv (TcEnv te ve gtvs) scope + +-- Non-monadic version, environment given explicitly +explicitLookupValueByKey :: ValueEnv -> Unique -> Id +explicitLookupValueByKey ve key + = lookupWithDefaultUFM_Directly ve def key + where + def = pprPanic "lookupValueByKey:" (pprUnique10 key) + +explicitLookupValue :: ValueEnv -> Name -> Maybe Id +explicitLookupValue ve name + = case maybeWiredInIdName name of + Just id -> Just id + Nothing -> lookupUFM ve name + + -- Extract the IdInfo from an IfaceSig imported from an interface file +tcAddImportedIdInfo :: ValueEnv -> Id -> Id +tcAddImportedIdInfo unf_env id + | isLocallyDefined id -- Don't look up locally defined Ids, because they + -- have explicit local definitions, so we get a black hole! + = id + | otherwise + = id `setIdInfo` new_info + -- The Id must be returned without a data dependency on maybe_id + where + new_info = -- pprTrace "tcAdd" (ppr id) $ + case explicitLookupValue unf_env (getName id) of + Nothing -> noIdInfo + Just imported_id -> idInfo imported_id + -- ToDo: could check that types are the same +\end{code} + + +%************************************************************************ +%* * +\subsection{Constructing new Ids} +%* * +%************************************************************************ + +\begin{code} +newLocalId :: OccName -> TcType -> SrcLoc -> NF_TcM s TcId +newLocalId name ty loc + = tcGetUnique `thenNF_Tc` \ uniq -> + returnNF_Tc (mkUserLocal name uniq ty loc) + +newSpecPragmaId :: Name -> TcType -> NF_TcM s TcId +newSpecPragmaId name ty + = tcGetUnique `thenNF_Tc` \ uniq -> + returnNF_Tc (mkSpecPragmaId (nameOccName name) uniq ty (getSrcLoc name)) \end{code} +%************************************************************************ +%* * +\subsection{Errors} +%* * +%************************************************************************ + +\begin{code} +badCon con_id + = quotes (ppr con_id) <+> ptext SLIT("is not a data constructor") +badPrimOp op + = quotes (ppr op) <+> ptext SLIT("is not a primop") + +tyNameOutOfScope name + = quotes (ppr name) <+> ptext SLIT("is not in scope") +\end{code}