\begin{code}
module TcIface (
tcImportDecl, checkWiredInTyCon, tcHiBootIface, typecheckIface,
- tcIfaceDecl, tcIfaceInst, tcIfaceRule, tcIfaceGlobal,
+ tcIfaceDecl, tcIfaceInst, tcIfaceFamInst, tcIfaceRules, tcIfaceGlobal,
tcExtCoreBindings
) where
#include "HsVersions.h"
import IfaceSyn
-import LoadIface ( loadInterface, loadWiredInHomeIface,
- loadDecls, findAndReadIface )
+import LoadIface ( loadInterface, loadWiredInHomeIface, findAndReadIface, loadDecls )
import IfaceEnv ( lookupIfaceTop, lookupIfaceExt, newGlobalBinder,
extendIfaceIdEnv, extendIfaceTyVarEnv, newIPName,
tcIfaceTyVar, tcIfaceLclId, lookupIfaceTc,
newIfaceName, newIfaceNames, ifaceExportNames )
-import BuildTyCl ( buildSynTyCon, buildAlgTyCon, buildDataCon, buildClass,
- mkAbstractTyConRhs, mkDataTyConRhs, mkNewTyConRhs )
+import BuildTyCl ( buildSynTyCon, buildAlgTyCon, buildDataCon,
+ buildClass,
+ mkAbstractTyConRhs, mkOpenDataTyConRhs,
+ mkOpenNewTyConRhs, mkDataTyConRhs, mkNewTyConRhs )
import TcRnMonad
import Type ( liftedTypeKind, splitTyConApp, mkTyConApp,
liftedTypeKindTyCon, unliftedTypeKindTyCon,
openTypeKindTyCon, argTypeKindTyCon,
- ubxTupleKindTyCon,
- mkTyVarTys, ThetaType )
+ ubxTupleKindTyCon, ThetaType )
import TypeRep ( Type(..), PredType(..) )
-import TyCon ( TyCon, tyConName )
+import TyCon ( TyCon, tyConName, SynTyConRhs(..), setTyConArgPoss )
import HscTypes ( ExternalPackageState(..),
TyThing(..), tyThingClass, tyThingTyCon,
ModIface(..), ModDetails(..), HomeModInfo(..),
- emptyModDetails, lookupTypeEnv, lookupType, typeEnvIds )
+ emptyModDetails, lookupTypeEnv, lookupType,
+ typeEnvIds )
import InstEnv ( Instance(..), mkImportedInstance )
+import FamInstEnv ( FamInst(..), mkImportedFamInst )
import CoreSyn
-import CoreUtils ( exprType )
+import CoreUtils ( exprType, dataConRepFSInstPat )
import CoreUnfold
import CoreLint ( lintUnfolding )
import WorkWrap ( mkWrapper )
vanillaIdInfo, newStrictnessInfo )
import Class ( Class )
import TyCon ( tyConDataCons, isTupleTyCon, mkForeignTyCon )
-import DataCon ( DataCon, dataConWorkId, dataConExTyVars, dataConInstArgTys )
+import DataCon ( DataCon, dataConWorkId )
import TysWiredIn ( tupleCon, tupleTyCon, listTyCon, intTyCon, boolTyCon, charTyCon, parrTyCon )
-import Var ( TyVar, mkTyVar, tyVarKind )
+import Var ( TyVar, mkTyVar )
import Name ( Name, nameModule, nameIsLocalOrFrom, isWiredInName,
nameOccName, wiredInNameTyThing_maybe )
import NameEnv
-import OccName ( OccName, mkVarOccFS, mkTyVarOccoccNameSpace, pprNameSpace )
-import FastString ( FastString )
+import OccName ( OccName, mkVarOccFS, mkTyVarOcc, occNameSpace,
+ pprNameSpace, occNameFS )
import Module ( Module, moduleName )
import UniqFM ( lookupUFM )
-import UniqSupply ( initUs_ )
+import UniqSupply ( initUs_, uniqsFromSupply )
import Outputable
import ErrUtils ( Message )
import Maybes ( MaybeErr(..) )
import SrcLoc ( noSrcLoc )
-import Util ( zipWithEqual, equalLength, splitAtList )
+import Util ( zipWithEqual )
import DynFlags ( DynFlag(..), isOneShot )
+import Control.Monad ( unless )
+import List ( elemIndex)
+import Maybe ( catMaybes )
\end{code}
This module takes
= return ()
| otherwise
= do { mod <- getModule
- ; if nameIsLocalOrFrom mod tc_name then
+ ; unless (mod == nameModule tc_name)
+ (initIfaceTcRn (loadWiredInHomeIface tc_name))
-- Don't look for (non-existent) Float.hi when
-- compiling Float.lhs, which mentions Float of course
- return ()
- else -- A bit yukky to call initIfaceTcRn here
- initIfaceTcRn (loadWiredInHomeIface tc_name)
+ -- A bit yukky to call initIfaceTcRn here
}
where
tc_name = tyConName tc
-- to handle unboxed tuples, so it must not see unfoldings.
ignore_prags <- doptM Opt_IgnoreInterfacePragmas
- -- Load & typecheck the decls
- ; decl_things <- loadDecls ignore_prags (mi_decls iface)
-
- ; let type_env = mkNameEnv decl_things
+ -- Typecheck the decls. This is done lazily, so that the knot-tying
+ -- within this single module work out right. In the If monad there is
+ -- no global envt for the current interface; instead, the knot is tied
+ -- through the if_rec_types field of IfGblEnv
+ ; names_w_things <- loadDecls ignore_prags (mi_decls iface)
+ ; let type_env = mkNameEnv names_w_things
; writeMutVar tc_env_var type_env
-- Now do those rules and instances
- ; let { rules | ignore_prags = []
- | otherwise = mi_rules iface
- ; dfuns = mi_insts iface
- }
- ; dfuns <- mapM tcIfaceInst dfuns
- ; rules <- mapM tcIfaceRule rules
+ ; insts <- mapM tcIfaceInst (mi_insts iface)
+ ; fam_insts <- mapM tcIfaceFamInst (mi_fam_insts iface)
+ ; rules <- tcIfaceRules ignore_prags (mi_rules iface)
-- Exports
- ; exports <- ifaceExportNames (mi_exports iface)
+ ; exports <- ifaceExportNames (mi_exports iface)
-- Finished
- ; return (ModDetails { md_types = type_env,
- md_insts = dfuns,
- md_rules = rules,
- md_exports = exports })
+ ; traceIf (vcat [text "Finished typechecking interface for" <+> ppr (mi_module iface),
+ text "Type envt:" <+> ppr type_env])
+ ; return $ ModDetails { md_types = type_env
+ , md_insts = insts
+ , md_fam_insts = fam_insts
+ , md_rules = rules
+ , md_exports = exports
+ }
}
\end{code}
\begin{code}
-tcIfaceDecl :: IfaceDecl -> IfL TyThing
+tcIfaceDecl :: Bool -- True <=> discard IdInfo on IfaceId bindings
+ -> IfaceDecl
+ -> IfL TyThing
-tcIfaceDecl (IfaceId {ifName = occ_name, ifType = iface_type, ifIdInfo = info})
+tcIfaceDecl ignore_prags (IfaceId {ifName = occ_name, ifType = iface_type, ifIdInfo = info})
= do { name <- lookupIfaceTop occ_name
; ty <- tcIfaceType iface_type
- ; info <- tcIdInfo name ty info
+ ; info <- tcIdInfo ignore_prags name ty info
; return (AnId (mkVanillaGlobal name ty info)) }
-tcIfaceDecl (IfaceData {ifName = occ_name,
+tcIfaceDecl ignore_prags
+ (IfaceData {ifName = occ_name,
ifTyVars = tv_bndrs,
ifCtxt = ctxt, ifGadtSyntax = gadt_syn,
ifCons = rdr_cons,
ifRec = is_rec,
- ifGeneric = want_generic })
+ ifGeneric = want_generic,
+ ifFamInst = mb_family })
= do { tc_name <- lookupIfaceTop occ_name
; bindIfaceTyVars tv_bndrs $ \ tyvars -> do
{ tycon <- fixM ( \ tycon -> do
{ stupid_theta <- tcIfaceCtxt ctxt
- ; cons <- tcIfaceDataCons tc_name tycon tyvars rdr_cons
+ ; famInst <-
+ case mb_family of
+ Nothing -> return Nothing
+ Just (fam, tys) ->
+ do { famTyCon <- tcIfaceTyCon fam
+ ; insttys <- mapM tcIfaceType tys
+ ; return $ Just (famTyCon, insttys)
+ }
+ ; cons <- tcIfaceDataCons tc_name tycon tyvars rdr_cons
; buildAlgTyCon tc_name tyvars stupid_theta
- cons is_rec want_generic gadt_syn
+ cons is_rec want_generic gadt_syn famInst
})
; traceIf (text "tcIfaceDecl4" <+> ppr tycon)
; return (ATyCon tycon)
}}
-tcIfaceDecl (IfaceSyn {ifName = occ_name, ifTyVars = tv_bndrs,
- ifSynRhs = rdr_rhs_ty})
+tcIfaceDecl ignore_prags
+ (IfaceSyn {ifName = occ_name, ifTyVars = tv_bndrs,
+ ifOpenSyn = isOpen, ifSynRhs = rdr_rhs_ty})
= bindIfaceTyVars tv_bndrs $ \ tyvars -> do
{ tc_name <- lookupIfaceTop occ_name
- ; rhs_ty <- tcIfaceType rdr_rhs_ty
- ; return (ATyCon (buildSynTyCon tc_name tyvars rhs_ty))
+ ; rhs_tyki <- tcIfaceType rdr_rhs_ty
+ ; let rhs = if isOpen then OpenSynTyCon rhs_tyki
+ else SynonymTyCon rhs_tyki
+ ; return (ATyCon (buildSynTyCon tc_name tyvars rhs))
}
-tcIfaceDecl (IfaceClass {ifCtxt = rdr_ctxt, ifName = occ_name, ifTyVars = tv_bndrs,
- ifFDs = rdr_fds, ifSigs = rdr_sigs,
+tcIfaceDecl ignore_prags
+ (IfaceClass {ifCtxt = rdr_ctxt, ifName = occ_name,
+ ifTyVars = tv_bndrs, ifFDs = rdr_fds,
+ ifATs = rdr_ats, ifSigs = rdr_sigs,
ifRec = tc_isrec })
-- ToDo: in hs-boot files we should really treat abstract classes specially,
-- as we do abstract tycons
; ctxt <- tcIfaceCtxt rdr_ctxt
; sigs <- mappM tc_sig rdr_sigs
; fds <- mappM tc_fd rdr_fds
- ; cls <- buildClass cls_name tyvars ctxt fds sigs tc_isrec
+ ; ats' <- mappM (tcIfaceDecl ignore_prags) rdr_ats
+ ; let ats = zipWith setTyThingPoss ats' (map ifTyVars rdr_ats)
+ ; cls <- buildClass cls_name tyvars ctxt fds ats sigs tc_isrec
; return (AClass cls) }
where
tc_sig (IfaceClassOp occ dm rdr_ty)
; tvs2' <- mappM tcIfaceTyVar tvs2
; return (tvs1', tvs2') }
-tcIfaceDecl (IfaceForeign {ifName = rdr_name, ifExtName = ext_name})
+ -- For each AT argument compute the position of the corresponding class
+ -- parameter in the class head. This will later serve as a permutation
+ -- vector when checking the validity of instance declarations.
+ setTyThingPoss (ATyCon tycon) atTyVars =
+ let classTyVars = map fst tv_bndrs
+ poss = catMaybes
+ . map ((`elemIndex` classTyVars) . fst)
+ $ atTyVars
+ -- There will be no Nothing, as we already passed renaming
+ in
+ ATyCon (setTyConArgPoss tycon poss)
+ setTyThingPoss _ _ = panic "TcIface.setTyThingPoss"
+
+tcIfaceDecl ignore_prags (IfaceForeign {ifName = rdr_name, ifExtName = ext_name})
= do { name <- lookupIfaceTop rdr_name
; return (ATyCon (mkForeignTyCon name ext_name
liftedTypeKind 0)) }
tcIfaceDataCons tycon_name tycon tc_tyvars if_cons
= case if_cons of
IfAbstractTyCon -> return mkAbstractTyConRhs
+ IfOpenDataTyCon -> return mkOpenDataTyConRhs
+ IfOpenNewTyCon -> return mkOpenNewTyConRhs
IfDataTyCon cons -> do { data_cons <- mappM tc_con_decl cons
; return (mkDataTyConRhs data_cons) }
IfNewTyCon con -> do { data_con <- tc_con_decl con
tcIfaceEqSpec spec
= mapM do_item spec
where
- do_item (occ, if_ty) = do { tv <- tcIfaceTyVar occ
+ do_item (occ, if_ty) = do { tv <- tcIfaceTyVar (occNameFS occ)
; ty <- tcIfaceType if_ty
; return (tv,ty) }
\end{code}
= do { dfun <- forkM (ptext SLIT("Dict fun") <+> ppr dfun_occ) $
tcIfaceExtId (LocalTop dfun_occ)
; cls' <- lookupIfaceExt cls
- ; mb_tcs' <- mapM do_tc mb_tcs
+ ; mb_tcs' <- mapM tc_rough mb_tcs
; return (mkImportedInstance cls' mb_tcs' orph dfun oflag) }
- where
- do_tc Nothing = return Nothing
- do_tc (Just tc) = do { tc' <- lookupIfaceTc tc; return (Just tc') }
+
+tcIfaceFamInst :: IfaceFamInst -> IfL FamInst
+tcIfaceFamInst (IfaceFamInst { ifFamInstTyCon = tycon,
+ ifFamInstFam = fam, ifFamInstTys = mb_tcs })
+-- = do { tycon' <- forkM (ptext SLIT("Inst tycon") <+> ppr tycon) $
+-- ^^^this line doesn't work, but vvv this does => CPP in Haskell = evil!
+ = do { tycon' <- forkM (text ("Inst tycon") <+> ppr tycon) $
+ tcIfaceTyCon tycon
+ ; fam' <- lookupIfaceExt fam
+ ; mb_tcs' <- mapM tc_rough mb_tcs
+ ; return (mkImportedFamInst fam' mb_tcs' tycon') }
+
+tc_rough Nothing = return Nothing
+tc_rough (Just tc) = do { tc' <- lookupIfaceTc tc; return (Just tc') }
\end{code}
(as a side effect) augment the type envt, and so we may need to iterate the process.
\begin{code}
+tcIfaceRules :: Bool -- True <=> ignore rules
+ -> [IfaceRule]
+ -> IfL [CoreRule]
+tcIfaceRules ignore_prags if_rules
+ | ignore_prags = return []
+ | otherwise = mapM tcIfaceRule if_rules
+
tcIfaceRule :: IfaceRule -> IfL CoreRule
tcIfaceRule (IfaceRule {ifRuleName = name, ifActivation = act, ifRuleBndrs = bndrs,
ifRuleHead = fn, ifRuleArgs = args, ifRuleRhs = rhs,
; tcIfaceDataAlt data_con inst_tys arg_occs rhs }
tcIfaceDataAlt con inst_tys arg_strs rhs
- = do { arg_names <- newIfaceNames (map mkVarOccFS arg_strs)
- ; let (tyvar_strs, id_strs) = splitAtList (dataConTyVars con) arg_strs
- ; tyvar_names <- mapM (newIfaceName . mkTyVarOcc) tyvar_strs
- ; id_names <- mapM (newIfaceName . mkVarOccFS) id_strs
- ; let ex_tvs = [ mkTyVar name (tyVarKind tv)
- | (name,tv) <- tyvar_names `zip` dataConExTyVars con ]
- arg_tys = dataConInstArgTys con (inst_tys ++ mkTyVarTys ex_tvs)
- arg_ids = ASSERT2( equalLength id_names arg_tys,
- ppr (con, tyvar_names++id_names, rhs) $$ ppr ex_tvs $$ ppr arg_tys )
- zipWith mkLocalId id_names arg_tys
-
- ; rhs' <- extendIfaceTyVarEnv ex_tvs $
+ = do { us <- newUniqueSupply
+ ; let uniqs = uniqsFromSupply us
+ ; let (ex_tvs, co_tvs, arg_ids)
+ = dataConRepFSInstPat arg_strs uniqs con inst_tys
+ all_tvs = ex_tvs ++ co_tvs
+
+ ; rhs' <- extendIfaceTyVarEnv all_tvs $
extendIfaceIdEnv arg_ids $
tcIfaceExpr rhs
- ; return (DataAlt con, ex_tvs ++ arg_ids, rhs') }
+ ; return (DataAlt con, all_tvs ++ arg_ids, rhs') }
\end{code}
%************************************************************************
\begin{code}
-tcIdInfo :: Name -> Type -> IfaceIdInfo -> IfL IdInfo
-tcIdInfo name ty NoInfo = return vanillaIdInfo
-tcIdInfo name ty (HasInfo info) = foldlM tcPrag init_info info
+tcIdInfo :: Bool -> Name -> Type -> IfaceIdInfo -> IfL IdInfo
+tcIdInfo ignore_prags name ty info
+ | ignore_prags = return vanillaIdInfo
+ | otherwise = case info of
+ NoInfo -> return vanillaIdInfo
+ HasInfo info -> foldlM tcPrag init_info info
where
-- Set the CgInfo to something sensible but uninformative before
-- we start; default assumption is that it has CAFs
get_in_scope_ids `thenM` \ in_scope ->
case lintUnfolding noSrcLoc in_scope core_expr' of
Nothing -> returnM ()
- Just fail_msg -> pprPanic "Iface Lint failure" (doc <+> fail_msg)
+ Just fail_msg -> pprPanic "Iface Lint failure" (hang doc 2 fail_msg)
) `thenM_`
returnM core_expr'
tcIfaceGlobal name
| Just thing <- wiredInNameTyThing_maybe name
-- Wired-in things include TyCons, DataCons, and Ids
- = do { loadWiredInHomeIface name; return thing }
- -- Even though we are in an interface file, we want to make
- -- sure its instances are loaded (imagine f :: Double -> Double)
- -- and its RULES are loaded too
+ = do { ifCheckWiredInThing name; return thing }
| otherwise
= do { (eps,hpt) <- getEpsAndHpt
; dflags <- getDOpts
Succeeded thing -> return thing
}}}}}
+ifCheckWiredInThing :: Name -> IfL ()
+-- Even though we are in an interface file, we want to make
+-- sure the instances of a wired-in thing are loaded (imagine f :: Double -> Double)
+-- Ditto want to ensure that RULES are loaded too
+ifCheckWiredInThing name
+ = do { mod <- getIfModule
+ -- Check whether we are typechecking the interface for this
+ -- very module. E.g when compiling the base library in --make mode
+ -- we may typecheck GHC.Base.hi. At that point, GHC.Base is not in
+ -- the HPT, so without the test we'll demand-load it into the PIT!
+ -- C.f. the same test in checkWiredInTyCon above
+ ; unless (mod == nameModule name)
+ (loadWiredInHomeIface name) }
+
tcIfaceTyCon :: IfaceTyCon -> IfL TyCon
tcIfaceTyCon IfaceIntTc = tcWiredInTyCon intTyCon
tcIfaceTyCon IfaceBoolTc = tcWiredInTyCon boolTyCon
-- sure the instances and RULES of this tycon are loaded
-- Imagine: f :: Double -> Double
tcWiredInTyCon :: TyCon -> IfL TyCon
-tcWiredInTyCon tc = do { loadWiredInHomeIface (tyConName tc)
+tcWiredInTyCon tc = do { ifCheckWiredInThing (tyConName tc)
; return tc }
tcIfaceClass :: IfaceExtName -> IfL Class
mk_iface_tyvar name ifKind = do { kind <- tcIfaceType ifKind
; return (mkTyVar name kind)
}
-
-mk_iface_tyvar name kind = mkTyVar name kind
\end{code}
projects / ghc-hetmet.git / blobdiff