-- Global environment
tcExtendGlobalEnv,
tcExtendGlobalValEnv,
- tcLookupGlobal,
+ tcLookupLocatedGlobal, tcLookupGlobal,
tcLookupGlobalId, tcLookupTyCon, tcLookupClass, tcLookupDataCon,
+ tcLookupLocatedGlobalId, tcLookupLocatedTyCon,
+ tcLookupLocatedClass, tcLookupLocatedDataCon,
- getInGlobalScope,
-
-- Local environment
- tcExtendTyVarKindEnv,
+ tcExtendKindEnv,
tcExtendTyVarEnv, tcExtendTyVarEnv2,
tcExtendLocalValEnv, tcExtendLocalValEnv2,
- tcLookup, tcLookupLocalIds,
+ tcLookup, tcLookupLocated, tcLookupLocalIds,
tcLookupId, tcLookupTyVar,
lclEnvElts, getInLocalScope, findGlobals,
+ wrongThingErr,
tcExtendRecEnv, -- For knot-tying
#include "HsVersions.h"
-import RnHsSyn ( RenamedMonoBinds, RenamedSig )
-import HsSyn ( RuleDecl(..), , HsTyVarBndr(..) )
+import HsSyn ( LRuleDecl, LHsBinds, LSig, pprLHsBinds )
import TcIface ( tcImportDecl )
import TcRnMonad
import TcMType ( zonkTcType, zonkTcTyVar, zonkTcTyVarsAndFV )
-import TcType ( Type, TcTyVar, TcTyVarSet,
+import TcType ( Type, TcKind, TcTyVar, TcTyVarSet,
tyVarsOfType, tyVarsOfTypes, tcSplitDFunTy, mkGenTyConApp,
getDFunTyKey, tcTyConAppTyCon, tyVarBindingInfo,
tidyOpenType, tidyOpenTyVar
)
import qualified Type ( getTyVar_maybe )
import Id ( idName, isLocalId )
-import Var ( TyVar, Id, mkTyVar, idType )
+import Var ( TyVar, Id, idType )
import VarSet
import VarEnv
import RdrName ( extendLocalRdrEnv )
import DataCon ( DataCon )
import TyCon ( TyCon )
import Class ( Class )
-import Name ( Name, NamedThing(..),
- getSrcLoc, mkInternalName, nameIsLocalOrFrom
- )
+import Name ( Name, NamedThing(..), getSrcLoc, mkInternalName, nameIsLocalOrFrom )
import NameEnv
import OccName ( mkDFunOcc, occNameString )
import HscTypes ( DFunId, extendTypeEnvList, lookupType,
- TyThing(..), tyThingId, tyThingTyCon, tyThingClass, tyThingDataCon,
+ TyThing(..), tyThingId, tyThingDataCon,
ExternalPackageState(..) )
-import SrcLoc ( SrcLoc )
+import SrcLoc ( SrcLoc, Located(..) )
import Outputable
import Maybe ( isJust )
\end{code}
%* *
%************************************************************************
+Using the Located versions (eg. tcLookupLocatedGlobal) is preferred,
+unless you know that the SrcSpan in the monad is already set to the
+span of the Name.
+
\begin{code}
-tcLookupGlobal :: Name -> TcM TyThing
+tcLookupLocatedGlobal :: Located Name -> TcM TyThing
-- c.f. IfaceEnvEnv.tcIfaceGlobal
+tcLookupLocatedGlobal name
+ = addLocM tcLookupGlobal name
+
+tcLookupGlobal :: Name -> TcM TyThing
tcLookupGlobal name
= do { env <- getGblEnv
; if nameIsLocalOrFrom (tcg_mod env) name
Nothing -> notFound "tcLookupGlobal" name
else do -- It's imported
- { eps <- getEps
- ; hpt <- getHpt
+ { (eps,hpt) <- getEpsAndHpt
; case lookupType hpt (eps_PTE eps) name of
Just thing -> return thing
Nothing -> do { traceIf (text "tcLookupGlobal" <+> ppr name)
tcLookupClass :: Name -> TcM Class
tcLookupClass name
- = tcLookupGlobal name `thenM` \ thing ->
- return (tyThingClass thing)
+ = tcLookupGlobal name `thenM` \ thing ->
+ case thing of
+ AClass cls -> return cls
+ other -> wrongThingErr "class" (AGlobal thing) name
tcLookupTyCon :: Name -> TcM TyCon
tcLookupTyCon name
- = tcLookupGlobal name `thenM` \ thing ->
- return (tyThingTyCon thing)
+ = tcLookupGlobal name `thenM` \ thing ->
+ case thing of
+ ATyCon tc -> return tc
+ other -> wrongThingErr "type constructor" (AGlobal thing) name
+
+tcLookupLocatedGlobalId :: Located Name -> TcM Id
+tcLookupLocatedGlobalId = addLocM tcLookupId
+
+tcLookupLocatedDataCon :: Located Name -> TcM DataCon
+tcLookupLocatedDataCon = addLocM tcLookupDataCon
+
+tcLookupLocatedClass :: Located Name -> TcM Class
+tcLookupLocatedClass = addLocM tcLookupClass
+
+tcLookupLocatedTyCon :: Located Name -> TcM TyCon
+tcLookupLocatedTyCon = addLocM tcLookupTyCon
\end{code}
%************************************************************************
= tcExtendGlobalEnv [AnId id | id <- ids] thing_inside
\end{code}
-A variety of global lookups, when we know what we are looking for.
-
\begin{code}
-getInGlobalScope :: TcM (Name -> Bool)
--- Get all things in the global environment; used for deciding what
--- rules to suck in. Anything defined in this module (nameIsLocalOrFrom)
--- is certainly in the envt, so we don't bother to look.
-getInGlobalScope
- = do { mod <- getModule
- ; eps <- getEps
- ; hpt <- getHpt
- ; return (\n -> nameIsLocalOrFrom mod n ||
- isJust (lookupType hpt (eps_PTE eps) n)) }
-\end{code}
-
-
-\begin{code}
-tcExtendRecEnv :: [(Name,TyThing)] -- Global bindings
- -> [(Name,TcTyThing)] -- Local bindings
- -> TcM r -> TcM r
--- Extend both local and global environments for the type/class knot tying game
-tcExtendRecEnv gbl_stuff lcl_stuff thing_inside
- = do { (gbl_env, lcl_env) <- getEnvs
- ; let { ge' = extendNameEnvList (tcg_type_env gbl_env) gbl_stuff
- ; le' = extendNameEnvList (tcl_env lcl_env) lcl_stuff }
- ; setEnvs (gbl_env {tcg_type_env = ge'}, lcl_env {tcl_env = le'})
- thing_inside }
+tcExtendRecEnv :: [(Name,TyThing)] -> TcM r -> TcM r
+-- Extend the global environments for the type/class knot tying game
+tcExtendRecEnv gbl_stuff thing_inside
+ = updGblEnv upd thing_inside
+ where
+ upd env = env { tcg_type_env = extend (tcg_type_env env) }
+ extend env = extendNameEnvList env gbl_stuff
\end{code}
%************************************************************************
\begin{code}
+tcLookupLocated :: Located Name -> TcM TcTyThing
+tcLookupLocated = addLocM tcLookup
+
tcLookup :: Name -> TcM TcTyThing
tcLookup name
= getLclEnv `thenM` \ local_env ->
\end{code}
\begin{code}
-tcExtendTyVarKindEnv :: [HsTyVarBndr Name] -> TcM r -> TcM r
--- The tyvars are all kinded
-tcExtendTyVarKindEnv tvs thing_inside
+tcExtendKindEnv :: [(Name, TcKind)] -> TcM r -> TcM r
+tcExtendKindEnv things thing_inside
= updLclEnv upd thing_inside
where
upd lcl_env = lcl_env { tcl_env = extend (tcl_env lcl_env) }
- extend env = extendNameEnvList env [(n, ATyVar (mkTyVar n k))
- | KindedTyVar n k <- tvs]
- -- No need to extend global tyvars for kind checking
+ extend env = extendNameEnvList env [(n, AThing k) | (n,k) <- things]
tcExtendTyVarEnv :: [TyVar] -> TcM r -> TcM r
tcExtendTyVarEnv tvs thing_inside
%************************************************************************
\begin{code}
-tcExtendRules :: [RuleDecl Id] -> TcM a -> TcM a
+tcExtendRules :: [LRuleDecl Id] -> TcM a -> TcM a
-- Just pop the new rules into the EPS and envt resp
-- All the rules come from an interface file, not soruce
-- Nevertheless, some may be for this module, if we read
data InstBindings
= VanillaInst -- The normal case
- RenamedMonoBinds -- Bindings
- [RenamedSig] -- User pragmas recorded for generating
+ (LHsBinds Name) -- Bindings
+ [LSig Name] -- User pragmas recorded for generating
-- specialised instances
| NewTypeDerived -- Used for deriving instances of newtypes, where the
pprInstInfoDetails info = pprInstInfo info $$ nest 2 (details (iBinds info))
where
- details (VanillaInst b _) = ppr b
+ details (VanillaInst b _) = pprLHsBinds b
details (NewTypeDerived _) = text "Derived from the representation type"
simpleInstInfoTy :: InstInfo -> Type
\begin{code}
notFound wheRe name = failWithTc (text wheRe <> colon <+> quotes (ppr name) <+>
ptext SLIT("is not in scope"))
+
+wrongThingErr expected thing name
+ = failWithTc (pp_thing thing <+> quotes (ppr name) <+>
+ ptext SLIT("used as a") <+> text expected)
+ where
+ pp_thing (AGlobal (ATyCon _)) = ptext SLIT("Type constructor")
+ pp_thing (AGlobal (AClass _)) = ptext SLIT("Class")
+ pp_thing (AGlobal (AnId _)) = ptext SLIT("Identifier")
+ pp_thing (AGlobal (ADataCon _)) = ptext SLIT("Data constructor")
+ pp_thing (ATyVar _) = ptext SLIT("Type variable")
+ pp_thing (ATcId _ _ _) = ptext SLIT("Local identifier")
\end{code}
projects / ghc-hetmet.git / blobdiff