X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fiface%2FTcIface.lhs;h=ac458d57b4e90a8cb6769dabb5865a3f5eff3300;hb=84f4c1dfb0c39c5b48a8b960fc82ab10aeb10c84;hp=6d95d08bd03b71946d8dfdd9f91384a0737131bf;hpb=29e736b7089d535b53e3f02ef04d36331921e42a;p=ghc-hetmet.git diff --git a/compiler/iface/TcIface.lhs b/compiler/iface/TcIface.lhs index 6d95d08..ac458d5 100644 --- a/compiler/iface/TcIface.lhs +++ b/compiler/iface/TcIface.lhs @@ -6,36 +6,37 @@ \begin{code} module TcIface ( tcImportDecl, checkWiredInTyCon, tcHiBootIface, typecheckIface, - tcIfaceDecl, tcIfaceInst, tcIfaceRule, tcIfaceGlobal, + tcIfaceDecl, tcIfaceInst, 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, mkDetailsFamInstCache ) import InstEnv ( Instance(..), mkImportedInstance ) import CoreSyn -import CoreUtils ( exprType, dataConRepOccInstPat ) +import CoreUtils ( exprType, dataConRepFSInstPat ) import CoreUnfold import CoreLint ( lintUnfolding ) import WorkWrap ( mkWrapper ) @@ -47,14 +48,14 @@ import IdInfo ( IdInfo, CafInfo(..), WorkerInfo(..), 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_, uniqsFromSupply ) @@ -62,9 +63,12 @@ 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 @@ -133,12 +137,11 @@ checkWiredInTyCon tc = 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 @@ -198,28 +201,30 @@ typecheckIface iface -- 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 + ; dfuns <- mapM tcIfaceInst (mi_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 = dfuns + , md_fam_insts = mkDetailsFamInstCache type_env + , md_rules = rules + , md_exports = exports + } } \end{code} @@ -342,43 +347,62 @@ the forkM stuff. \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 (IfaceFamInst { ifFamInstTyCon = fam + , ifFamInstTys = 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 @@ -387,7 +411,9 @@ tcIfaceDecl (IfaceClass {ifCtxt = rdr_ctxt, ifName = occ_name, ifTyVars = tv_bnd ; 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) @@ -404,7 +430,20 @@ tcIfaceDecl (IfaceClass {ifCtxt = rdr_ctxt, ifName = occ_name, ifTyVars = tv_bnd ; 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)) } @@ -412,6 +451,8 @@ tcIfaceDecl (IfaceForeign {ifName = rdr_name, ifExtName = ext_name}) 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 @@ -452,7 +493,7 @@ tcIfaceDataCons tycon_name tycon tc_tyvars if_cons 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} @@ -491,6 +532,13 @@ are in the type environment. However, remember that typechecking a Rule may (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, @@ -680,13 +728,14 @@ tcIfaceAlt (tycon, inst_tys) (IfaceTupleAlt boxity, arg_occs, rhs) tcIfaceDataAlt con inst_tys arg_strs rhs = do { us <- newUniqueSupply ; let uniqs = uniqsFromSupply us - ; let (ex_tvs, co_tvs, arg_ids) = dataConOccInstPat uniqs arg_occs con inst_tys - all_tvs = ex_tvs ++ co_tvs + ; 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} @@ -721,9 +770,12 @@ do_one (IfaceRec pairs) thing_inside %************************************************************************ \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 @@ -791,7 +843,7 @@ tcPragExpr name expr 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' @@ -820,10 +872,7 @@ tcIfaceGlobal :: Name -> IfL TyThing 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 @@ -850,6 +899,20 @@ tcIfaceGlobal name 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 @@ -879,7 +942,7 @@ tcIfaceTyCon IfaceUbxTupleKindTc = return ubxTupleKindTyCon -- 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 @@ -967,7 +1030,5 @@ mk_iface_tyvar :: Name -> IfaceKind -> IfL TyVar mk_iface_tyvar name ifKind = do { kind <- tcIfaceType ifKind ; return (mkTyVar name kind) } - -mk_iface_tyvar name kind = mkTyVar name kind \end{code}