tcLookupLocatedGlobal, tcLookupGlobal,
tcLookupGlobalId, tcLookupTyCon, tcLookupClass, tcLookupDataCon,
tcLookupLocatedGlobalId, tcLookupLocatedTyCon,
- tcLookupLocatedClass, tcLookupLocatedDataCon,
+ tcLookupLocatedClass,
- getInGlobalScope,
-
-- Local environment
tcExtendKindEnv,
- tcExtendTyVarEnv, tcExtendTyVarEnv2,
- tcExtendLocalValEnv, tcExtendLocalValEnv2,
+ tcExtendTyVarEnv, tcExtendTyVarEnv2,
+ tcExtendIdEnv, tcExtendIdEnv1, tcExtendIdEnv2,
tcLookup, tcLookupLocated, tcLookupLocalIds,
tcLookupId, tcLookupTyVar,
lclEnvElts, getInLocalScope, findGlobals,
#include "HsVersions.h"
-import HsSyn ( LRuleDecl, LHsBinds, LSig )
+import HsSyn ( LRuleDecl, LHsBinds, LSig, pprLHsBinds )
import TcIface ( tcImportDecl )
import TcRnMonad
import TcMType ( zonkTcType, zonkTcTyVar, zonkTcTyVarsAndFV )
import TcType ( Type, TcKind, TcTyVar, TcTyVarSet,
tyVarsOfType, tyVarsOfTypes, tcSplitDFunTy, mkGenTyConApp,
- getDFunTyKey, tcTyConAppTyCon, tyVarBindingInfo,
- tidyOpenType, tidyOpenTyVar
+ getDFunTyKey, tcTyConAppTyCon,
+ tidyOpenType, tidyOpenTyVar, pprTyThingCategory
)
import qualified Type ( getTyVar_maybe )
import Id ( idName, isLocalId )
import SrcLoc ( SrcLoc, Located(..) )
import Outputable
-import Maybe ( isJust )
\end{code}
then -- It's defined in this module
case lookupNameEnv (tcg_type_env env) name of
Just thing -> return thing
- Nothing -> notFound "tcLookupGlobal" name
+ Nothing -> notFound name -- Panic!
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)
tcLookupLocatedGlobalId :: Located Name -> TcM Id
tcLookupLocatedGlobalId = addLocM tcLookupId
-tcLookupLocatedDataCon :: Located Name -> TcM DataCon
-tcLookupLocatedDataCon = addLocM tcLookupDataCon
-
tcLookupLocatedClass :: Located Name -> TcM Class
tcLookupLocatedClass = addLocM tcLookupClass
= 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)] -> TcM r -> TcM r
-- Extend the global environments for the type/class knot tying game
\begin{code}
-tcExtendLocalValEnv :: [TcId] -> TcM a -> TcM a
-tcExtendLocalValEnv ids thing_inside
- = getLclEnv `thenM` \ env ->
- let
- extra_global_tyvars = tyVarsOfTypes [idType id | id <- ids]
- th_lvl = thLevel (tcl_th_ctxt env)
- proc_lvl = proc_level (tcl_arrow_ctxt env)
- extra_env = [(idName id, ATcId id th_lvl proc_lvl) | id <- ids]
- le' = extendNameEnvList (tcl_env env) extra_env
- rdr_env' = extendLocalRdrEnv (tcl_rdr env) (map idName ids)
- in
- tc_extend_gtvs (tcl_tyvars env) extra_global_tyvars `thenM` \ gtvs' ->
- setLclEnv (env {tcl_env = le', tcl_tyvars = gtvs', tcl_rdr = rdr_env'}) thing_inside
-
-tcExtendLocalValEnv2 :: [(Name,TcId)] -> TcM a -> TcM a
-tcExtendLocalValEnv2 names_w_ids thing_inside
+tcExtendIdEnv :: [TcId] -> TcM a -> TcM a
+-- Invariant: the TcIds are fully zonked. Reasons:
+-- (a) The kinds of the forall'd type variables are defaulted
+-- (see Kind.defaultKind, done in zonkQuantifiedTyVar)
+-- (b) There are no via-Indirect occurrences of the bound variables
+-- in the types, because instantiation does not look through such things
+-- (c) The call to tyVarsOfTypes is ok without looking through refs
+tcExtendIdEnv ids thing_inside = tcExtendIdEnv2 [(idName id, id) | id <- ids] thing_inside
+
+tcExtendIdEnv1 :: Name -> TcId -> TcM a -> TcM a
+tcExtendIdEnv1 name id thing_inside = tcExtendIdEnv2 [(name,id)] thing_inside
+
+tcExtendIdEnv2 :: [(Name,TcId)] -> TcM a -> TcM a
+-- Invariant: the TcIds are fully zonked (see tcExtendIdEnv above)
+tcExtendIdEnv2 names_w_ids thing_inside
= getLclEnv `thenM` \ env ->
let
extra_global_tyvars = tyVarsOfTypes [idType id | (name,id) <- names_w_ids]
tv == tv' = empty
| otherwise = equals <+> ppr tidy_ty
-- It's ok to use Type.getTyVar_maybe because ty is zonked by now
-
- bound_at = tyVarBindingInfo tv
+ bound_at = ptext SLIT("bound at:") <+> ppr (getSrcLoc tv)
in
returnM (tidy_env2, Just msg)
\end{code}
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"))
+notFound name
+ = failWithTc (ptext SLIT("GHC internal error:") <+> 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")
+ pp_thing (AGlobal thing) = pprTyThingCategory thing
+ pp_thing (ATyVar _) = ptext SLIT("Type variable")
+ pp_thing (ATcId _ _ _) = ptext SLIT("Local identifier")
\end{code}