\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, getAllEnvTyCons,
- tcTyVarScope, tcTyVarScopeGivenKinds, tcLookupTyVar,
+ tcExtendUVarEnv, tcLookupUVar,
- tcExtendTyConEnv, tcLookupTyCon, tcLookupTyConByKey,
- tcExtendClassEnv, tcLookupClass, tcLookupClassByKey,
+ tcExtendTyVarEnv, tcExtendTyVarEnvForMeths, tcExtendTypeEnv, tcGetInScopeTyVars,
+
+ 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,
+ valueEnvIds,
+ 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, lazySetIdInfo, idInfo, tyVarKind, UVar,
+ )
+import TcType ( TcType, TcTyVar, TcTyVarSet, TcThetaType,
+ tcInstTyVars, zonkTcTyVars,
+ TcKind, kindToTcKind
)
-import TyVar ( mkTyVar, tyVarKind, unionTyVarSets, emptyTyVarSet )
-import Type ( tyVarsOfTypes )
-import TyCon ( TyCon, Arity(..), tyConKind, synTyConArity )
-import Class ( Class(..), GenClass, classSig )
-
-import TcMonad hiding ( rnMtoTcM )
-
-import Name ( getOccName, getSrcLoc, Name{-instance NamedThing-} )
-import PprStyle
-import Pretty
-import RnHsSyn ( RnName(..) )
-import Type ( splitForAllTy )
-import Unique ( pprUnique10, pprUnique{-ToDo:rm-} )
-import UniqFM
-import Util ( zipWithEqual, zipWith3Equal, zipLazy, panic, pprPanic, pprTrace{-ToDo:rm-} )
+import VarEnv
+import VarSet
+import Type ( Kind, superKind,
+ tyVarsOfType, tyVarsOfTypes, mkTyVarTy,
+ splitForAllTys, splitRhoTy, splitFunTys,
+ splitAlgTyConApp_maybe, getTyVar
+ )
+import Subst ( substTy )
+import UsageSPUtils ( unannotTy )
+import DataCon ( DataCon )
+import TyCon ( TyCon, tyConKind, tyConArity, isSynTyCon )
+import Class ( Class, classTyCon )
+
+import TcMonad
+
+import BasicTypes ( Arity )
+import IdInfo ( vanillaIdInfo )
+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, catMaybes )
+import SrcLoc ( SrcLoc )
+import FastString ( FastString )
+import Outputable
+\end{code}
+
+%************************************************************************
+%* *
+\subsection{TcId}
+%* *
+%************************************************************************
+
+
+\begin{code}
+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
+ (arg_tys, result_ty) = splitFunTys con_tau
+ in
+ 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 (unannotTy (idType id))
+ in
+ tcInstTyVars tyvars `thenNF_Tc` \ (tyvars', arg_tys, tenv) ->
+ let
+ rho' = substTy tenv rho
+ (theta', tau') = splitRhoTy rho'
+ in
+ returnNF_Tc (tyvars', theta', tau')
\end{code}
+Between the renamer and the first invocation of the UsageSP inference,
+identifiers read from interface files will have usage information in
+their types, whereas other identifiers will not. The unannotTy here
+in @tcInstId@ prevents this information from pointlessly propagating
+further prior to the first usage inference.
+
+
+%************************************************************************
+%* *
+\subsection{TcEnv}
+%* *
+%************************************************************************
+
Data type declarations
~~~~~~~~~~~~~~~~~~~~~
\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]
+data TcEnv = TcEnv
+ UsageEnv
+ 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
+
+type UsageEnv = NameEnv UVar
+type TypeEnv = NameEnv (TcKind, Maybe Arity, TcTyThing)
+type ValueEnv = NameEnv Id
+
+valueEnvIds :: ValueEnv -> [Id]
+valueEnvIds ve = eltsUFM ve
+
+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
+
+
+initEnv :: TcRef TcTyVarSet -> TcEnv
+initEnv mut = TcEnv emptyUFM emptyUFM emptyUFM (emptyVarSet, mut)
+
+getEnvTyCons (TcEnv _ te _ _) = [tc | (_, _, ATyCon tc) <- eltsUFM te]
+getEnvClasses (TcEnv _ te _ _) = [cl | (_, _, AClass cl) <- eltsUFM te]
+getAllEnvTyCons (TcEnv _ te _ _) = catMaybes (map gettc (eltsUFM te))
+ where
+ gettc (_,_, ATyCon tc) = Just tc
+ gettc (_,_, AClass cl) = Just (classTyCon cl)
+ gettc _ = Nothing
\end{code}
-Making new TcTyVars, with knot tying!
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+The UsageEnv
+~~~~~~~~~~~~
+
+Extending the usage environment.
+
\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
+tcExtendUVarEnv :: Name -> UVar -> TcM s r -> TcM s r
+tcExtendUVarEnv uv_name uv scope
+ = tcGetEnv `thenNF_Tc` \ (TcEnv ue te ve gtvs) ->
+ tcSetEnv (TcEnv (addToUFM ue uv_name uv) te ve gtvs) scope
\end{code}
+Looking up in the environments.
+
+\begin{code}
+tcLookupUVar :: Name -> NF_TcM s UVar
+tcLookupUVar uv_name
+ = tcGetEnv `thenNF_Tc` \ (TcEnv ue te ve gtvs) ->
+ case lookupUFM ue uv_name of
+ Just uv -> returnNF_Tc uv
+ Nothing -> failWithTc (uvNameOutOfScope uv_name)
+\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.
+The TypeEnv
+~~~~~~~~~~~~
+
+Extending the type environment.
\begin{code}
-tcExtendTyConEnv :: [(RnName,Maybe Arity)] -> [TyCon] -> TcM s r -> TcM s r
+tcExtendTyVarEnv :: [TyVar] -> TcM s r -> TcM s r
+tcExtendTyVarEnv tyvars scope
+ = tcGetEnv `thenNF_Tc` \ (TcEnv ue te ve (in_scope_tvs, gtvs)) ->
+ let
+ 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
+ -- 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 ue 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 ue te ve gtvs) ->
+ let
+ te' = addListToUFM te stuff
+ in
+ tcSetEnv (TcEnv ue 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 ue te ve (in_scope,gtvs)) ->
+ tc_extend_gtvs gtvs extra_global_tvs `thenNF_Tc` \ gtvs' ->
+ tcSetEnv (TcEnv ue te ve (in_scope,gtvs')) scope
-tcExtendTyConEnv names_w_arities tycons scope
- = newKindVars (length names_w_arities) `thenNF_Tc` \ kinds ->
- tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) ->
+tc_extend_gtvs gtvs extra_global_tvs
+ = tcReadMutVar gtvs `thenNF_Tc` \ global_tvs ->
let
- tce' = addListToUFM tce [ (name, (kind, arity, tycon))
- | ((name,arity), (kind,tycon)) <- names_w_arities `zip`
- (kinds `zipLazy` tycons)
- ]
+ new_global_tyvars = global_tvs `unionVarSet` extra_global_tvs
in
- tcSetEnv (TcEnv tve tce' ce gve lve gtvs) scope `thenTc` \ result ->
- mapNF_Tc tcDefaultKind kinds `thenNF_Tc_`
- returnTc result
+ tcNewMutVar new_global_tyvars
+\end{code}
+@tcGetGlobalTyVars@ returns a fully-zonked set of tyvars free in the environment.
+To improve subsequent calls to the same function it writes the zonked set back into
+the environment.
-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) ->
+\begin{code}
+tcGetGlobalTyVars :: NF_TcM s TcTyVarSet
+tcGetGlobalTyVars
+ = tcGetEnv `thenNF_Tc` \ (TcEnv ue te ve (_,gtvs)) ->
+ tcReadMutVar gtvs `thenNF_Tc` \ global_tvs ->
+ zonkTcTyVars (varSetElems global_tvs) `thenNF_Tc` \ global_tys' ->
let
- ce' = addListToUFM ce (names `zip` (kinds `zipLazy` classes))
+ global_tvs' = (tyVarsOfTypes global_tys')
in
- tcSetEnv (TcEnv tve tce ce' gve lve gtvs) scope `thenTc` \ result ->
- mapNF_Tc tcDefaultKind kinds `thenNF_Tc_`
- returnTc result
+ tcWriteMutVar gtvs global_tvs' `thenNF_Tc_`
+ returnNF_Tc global_tvs'
+
+tcGetInScopeTyVars :: NF_TcM s [TcTyVar]
+tcGetInScopeTyVars
+ = tcGetEnv `thenNF_Tc` \ (TcEnv ue te ve (in_scope_tvs, gtvs)) ->
+ returnNF_Tc (varSetElems in_scope_tvs)
\end{code}
-Looking up in the environments.
+Type constructors and classes
\begin{code}
-tcLookupTyVar name
- = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) ->
- returnNF_Tc (lookupWithDefaultUFM tve (pprPanic "tcLookupTyVar:" (ppr PprShowAll name)) name)
+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 ue te ve gtvs) ->
+ let
+ te' = addListToUFM te bindings
+ in
+ tcSetEnv (TcEnv ue te' ve gtvs) scope
+\end{code}
-tcLookupTyCon (WiredInTyCon tc) -- wired in tycons
- = returnNF_Tc (kindToTcKind (tyConKind tc), synTyConArity tc, tc)
+Looking up in the environments.
+\begin{code}
+tcLookupTy :: Name -> NF_TcM s (TcKind, Maybe Arity, TcTyThing)
+tcLookupTy name
+ = tcGetEnv `thenNF_Tc` \ (TcEnv ue 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
+
+tcLookupTyCon :: Name -> NF_TcM s TyCon
tcLookupTyCon name
- = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) ->
- returnNF_Tc (lookupWithDefaultUFM tce (pprPanic "tcLookupTyCon:" (ppr PprShowAll name)) name)
-
-tcLookupTyConByKey uniq
- = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) ->
- let
- (kind, arity, tycon) = lookupWithDefaultUFM_Directly tce
- (pprPanic "tcLookupTyCon:" (pprUnique10 uniq))
- uniq
- in
+ = tcLookupTy name `thenNF_Tc` \ (_, _, ATyCon tycon) ->
returnNF_Tc tycon
-tcLookupClass name
- = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) ->
--- pprTrace "tcLookupClass:" (ppCat [ppStr "Uniq:", pprUnique10 (uniqueOf name), ppStr "; avail:", ppCat (map (pprUnique10 . fst) (ufmToList ce))]) $
--- pprTrace "tcLookupClass:" (ppCat [ppStr "Uniq:", pprUnique (uniqueOf name), ppStr "; avail:", ppCat (map (pprUnique . fst) (ufmToList ce))]) $
- returnNF_Tc (lookupWithDefaultUFM ce (pprPanic "tcLookupClass:" (ppr PprShowAll name)) name)
-
-tcLookupClassByKey uniq
- = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) ->
- let
- (kind, clas) = lookupWithDefaultUFM_Directly ce
- (pprPanic "tcLookupClassByKey:" (pprUnique10 uniq))
- uniq
- in
- returnNF_Tc clas
+tcLookupClassByKey :: Unique -> NF_TcM s Class
+tcLookupClassByKey key
+ = tcGetEnv `thenNF_Tc` \ (TcEnv ue 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 ue te ve gtvs) ->
+ case lookupUFM_Directly te key of
+ Just (_, _, ATyCon tc) -> returnNF_Tc tc
+ other -> pprPanic "tcLookupTyConByKey:" (pprUnique10 key)
\end{code}
-Extending and consulting the value environment
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+%************************************************************************
+%* *
+\subsection{The value environment}
+%* *
+%************************************************************************
+
\begin{code}
+tcExtendGlobalValEnv :: [Id] -> TcM s a -> TcM s a
tcExtendGlobalValEnv ids scope
- = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) ->
+ = tcGetEnv `thenNF_Tc` \ (TcEnv ue te ve gtvs) ->
let
- gve' = addListToUFM_Directly gve [(uniqueOf id, id) | id <- ids]
+ ve' = addListToUFM_Directly ve [(getUnique id, id) | id <- ids]
in
- tcSetEnv (TcEnv tve tce ce gve' lve gtvs) scope
+ tcSetEnv (TcEnv ue te ve' gtvs) scope
-tcExtendLocalValEnv names ids scope
- = tcGetEnv `thenNF_Tc` \ (TcEnv tve tce ce gve lve gtvs) ->
+tcExtendLocalValEnv :: [(Name,TcId)] -> TcM s a -> TcM s a
+tcExtendLocalValEnv names_w_ids scope
+ = tcGetEnv `thenNF_Tc` \ (TcEnv ue te ve (in_scope_tvs,gtvs)) ->
tcReadMutVar gtvs `thenNF_Tc` \ global_tvs ->
let
- lve' = addListToUFM lve (names `zip` ids)
- extra_global_tyvars = tyVarsOfTypes (map idType ids)
- new_global_tyvars = global_tvs `unionTyVarSets` extra_global_tyvars
+ ve' = addListToUFM ve names_w_ids
+ extra_global_tyvars = tyVarsOfTypes (map (idType . snd) names_w_ids)
in
- tcNewMutVar new_global_tyvars `thenNF_Tc` \ gtvs' ->
-
- tcSetEnv (TcEnv tve tce ce gve lve' gtvs') scope
+ tc_extend_gtvs gtvs extra_global_tyvars `thenNF_Tc` \ gtvs' ->
+ tcSetEnv (TcEnv ue te ve' (in_scope_tvs,gtvs')) scope
\end{code}
-@tcGetGlobalTyVars@ returns a fully-zonked set of tyvars free in the environment.
-To improve subsequent calls to the same function it writes the zonked set back into
-the environment.
\begin{code}
-tcGetGlobalTyVars :: NF_TcM s (TcTyVarSet s)
-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_`
- returnNF_Tc global_tvs'
+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 ue 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 ue te ve gtvs) ->
+ returnNF_Tc (lookupUFM ve name)
+
+tcLookupValueByKey :: Unique -> NF_TcM s Id -- Panics if not found
+tcLookupValueByKey key
+ = tcGetEnv `thenNF_Tc` \ (TcEnv ue te ve gtvs) ->
+ returnNF_Tc (explicitLookupValueByKey ve key)
+
+tcLookupValueByKeyMaybe :: Unique -> NF_TcM s (Maybe Id)
+tcLookupValueByKeyMaybe key
+ = tcGetEnv `thenNF_Tc` \ (TcEnv ue te ve gtvs) ->
+ returnNF_Tc (lookupUFM_Directly ve key)
+
+tcGetValueEnv :: NF_TcM s ValueEnv
+tcGetValueEnv
+ = tcGetEnv `thenNF_Tc` \ (TcEnv ue te ve gtvs) ->
+ returnNF_Tc ve
+
+tcSetValueEnv :: ValueEnv -> TcM s a -> TcM s a
+tcSetValueEnv ve scope
+ = tcGetEnv `thenNF_Tc` \ (TcEnv ue te _ gtvs) ->
+ tcSetEnv (TcEnv ue 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 `lazySetIdInfo` 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 -> vanillaIdInfo
+ Just imported_id -> idInfo imported_id
+ -- ToDo: could check that types are the same
\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)
-
-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)
-
-
-tcLookupGlobalValue :: RnName -> NF_TcM s Id
-
-tcLookupGlobalValue (WiredInId id) -- wired in ids
- = returnNF_Tc id
-
-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:" (pprUnique10 uniq)
-#else
- def = panic "tcLookupGlobalValueByKey"
-#endif
+%************************************************************************
+%* *
+\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}
-Constructing new Ids
-~~~~~~~~~~~~~~~~~~~~
+%************************************************************************
+%* *
+\subsection{Errors}
+%* *
+%************************************************************************
\begin{code}
-newMonoIds :: [RnName] -> Kind -> ([TcIdBndr s] -> TcM s a) -> TcM s a
+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")
-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
+uvNameOutOfScope name
+ = ptext SLIT("UVar") <+> quotes (ppr name) <+> ptext SLIT("is not in scope")
- mk_id name uniq ty
- = let
- name_str = case (getOccName name) of { Unqual n -> n }
- in
- mkUserLocal name_str uniq ty (getSrcLoc name)
- 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 ->
- let
- new_ids = zipWith3Equal mk_id names uniqs tys
- mk_id name uniq ty = TcId (mkUserLocal name uniq ty loc)
- in
- returnNF_Tc new_ids
+tyNameOutOfScope name
+ = quotes (ppr name) <+> ptext SLIT("is not in scope")
\end{code}
-
-
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