tcRnLookupName,
tcRnGetInfo,
getModuleExports,
- tcRnRecoverDataCon,
#endif
tcRnModule,
tcTopSrcDecls,
tcRnExtCore
) where
-#include "HsVersions.h"
-
-import IO
#ifdef GHCI
import {-# SOURCE #-} TcSplice ( tcSpliceDecls )
#endif
import DynFlags
import StaticFlags
import HsSyn
-import RdrHsSyn
-
import PrelNames
import RdrName
import TcHsSyn
import TcExpr
import TcRnMonad
-import TcType
+import Coercion
import Inst
import FamInst
import InstEnv
import FamInstEnv
+import TcAnnotations
import TcBinds
import TcDefaults
import TcEnv
import IfaceSyn
import TcSimplify
import TcTyClsDecls
+import TcUnify ( withBox )
import LoadIface
import RnNames
import RnEnv
import RnSource
-import RnHsDoc
import PprCore
import CoreSyn
import ErrUtils
import Id
+import VarEnv
import Var
import Module
import UniqFM
import NameEnv
import NameSet
import TyCon
+import TysPrim
import SrcLoc
import HscTypes
import ListSetOps
import Outputable
+import DataCon
+import Type
+import Class
+import Data.List ( sortBy )
#ifdef GHCI
-import Linker
-import DataCon
import TcHsType
import TcMType
import TcMatches
-import TcGadt
import RnTypes
import RnExpr
import IfaceEnv
import MkId
-import TysWiredIn
-import IdInfo
-import {- Kind parts of -} Type
import BasicTypes
+import TidyPgm ( globaliseAndTidyId )
+import TcType ( isUnitTy, isTauTy, tyClsNamesOfDFunHead )
+import TysWiredIn ( unitTy, mkListTy )
#endif
import FastString
import Util
import Bag
-import Control.Monad ( unless )
-import Data.Maybe ( isJust )
-import Foreign.Ptr ( Ptr )
+import Control.Monad
+#include "HsVersions.h"
\end{code}
-
-
%************************************************************************
%* *
Typecheck and rename a module
tcRnModule hsc_env hsc_src save_rn_syntax
(L loc (HsModule maybe_mod export_ies
- import_decls local_decls mod_deprec _
- module_info maybe_doc))
+ import_decls local_decls mod_deprec
+ maybe_doc_hdr))
= do { showPass (hsc_dflags hsc_env) "Renamer/typechecker" ;
let { this_pkg = thisPackage (hsc_dflags hsc_env) ;
-- thing (especially via 'module Foo' export item)
-- That is, only uses in the *body* of the module are complained about
traceRn (text "rn3") ;
- failIfErrsM ; -- finishDeprecations crashes sometimes
+ failIfErrsM ; -- finishWarnings crashes sometimes
-- as a result of typechecker repairs (e.g. unboundNames)
- tcg_env <- finishDeprecations (hsc_dflags hsc_env) mod_deprec tcg_env ;
+ tcg_env <- finishWarnings (hsc_dflags hsc_env) mod_deprec tcg_env ;
-- Process the export list
+ traceRn (text "rn4a: before exports");
tcg_env <- rnExports (isJust maybe_mod) export_ies tcg_env ;
- traceRn (text "rn4") ;
+ traceRn (text "rn4b: after exportss") ;
+
+ -- Check that main is exported (must be after rnExports)
+ checkMainExported tcg_env ;
-- Compare the hi-boot iface (if any) with the real thing
-- Must be done after processing the exports
tcg_env <- checkHiBootIface tcg_env boot_iface ;
- -- Make the new type env available to stuff slurped from interface files
- -- Must do this after checkHiBootIface, because the latter might add new
- -- bindings for boot_dfuns, which may be mentioned in imported unfoldings
- writeMutVar (tcg_type_env_var tcg_env) (tcg_type_env tcg_env) ;
+ -- The new type env is already available to stuff slurped from
+ -- interface files, via TcEnv.updateGlobalTypeEnv
+ -- It's important that this includes the stuff in checkHiBootIface,
+ -- because the latter might add new bindings for boot_dfuns,
+ -- which may be mentioned in imported unfoldings
- -- Rename the Haddock documentation
- tcg_env <- rnHaddock module_info maybe_doc tcg_env ;
+ -- Don't need to rename the Haddock documentation,
+ -- it's not parsed by GHC anymore.
+ tcg_env <- return (tcg_env { tcg_doc_hdr = maybe_doc_hdr }) ;
-- Report unused names
reportUnusedNames export_ies tcg_env ;
\begin{code}
tcRnImports :: HscEnv -> Module -> [LImportDecl RdrName] -> TcM TcGblEnv
tcRnImports hsc_env this_mod import_decls
- = do { (rn_imports, rdr_env, imports) <- rnImports import_decls ;
+ = do { (rn_imports, rdr_env, imports,hpc_info) <- rnImports import_decls ;
; let { dep_mods :: ModuleNameEnv (ModuleName, IsBootInterface)
; dep_mods = imp_dep_mods imports
; want_instances :: ModuleName -> Bool
; want_instances mod = mod `elemUFM` dep_mods
&& mod /= moduleName this_mod
- ; home_insts = hptInstances hsc_env want_instances
+ ; (home_insts, home_fam_insts) = hptInstances hsc_env
+ want_instances
} ;
-- Record boot-file info in the EPS, so that it's
-- Update the gbl env
; updGblEnv ( \ gbl ->
- gbl { tcg_rdr_env = plusOccEnv (tcg_rdr_env gbl) rdr_env,
- tcg_imports = tcg_imports gbl `plusImportAvails` imports,
- tcg_rn_imports = fmap (const rn_imports) (tcg_rn_imports gbl),
- tcg_inst_env = extendInstEnvList (tcg_inst_env gbl) home_insts
- }) $ do {
+ gbl {
+ tcg_rdr_env = plusOccEnv (tcg_rdr_env gbl) rdr_env,
+ tcg_imports = tcg_imports gbl `plusImportAvails` imports,
+ tcg_rn_imports = rn_imports,
+ tcg_inst_env = extendInstEnvList (tcg_inst_env gbl) home_insts,
+ tcg_fam_inst_env = extendFamInstEnvList (tcg_fam_inst_env gbl)
+ home_fam_insts,
+ tcg_hpc = hpc_info
+ }) $ do {
; traceRn (text "rn1" <+> ppr (imp_dep_mods imports))
-- Fail if there are any errors so far
-- Check type-familily consistency
; traceRn (text "rn1: checking family instance consistency")
- ; let { dir_imp_mods = map (\ (mod, _, _) -> mod)
- . moduleEnvElts
+ ; let { dir_imp_mods = moduleEnvKeys
. imp_mods
$ imports }
; checkFamInstConsistency (imp_finsts imports) dir_imp_mods ;
let { ldecls = map noLoc decls } ;
- -- Deal with the type declarations; first bring their stuff
- -- into scope, then rname them, then type check them
- tcg_env <- importsFromLocalDecls (mkFakeGroup ldecls) ;
+ -- bring the type and class decls into scope
+ -- ToDo: check that this doesn't need to extract the val binds.
+ -- It seems that only the type and class decls need to be in scope below because
+ -- (a) tcTyAndClassDecls doesn't need the val binds, and
+ -- (b) tcExtCoreBindings doesn't need anything
+ -- (in fact, it might not even need to be in the scope of
+ -- this tcg_env at all)
+ avails <- getLocalNonValBinders (mkFakeGroup ldecls) ;
+ tc_envs <- extendGlobalRdrEnvRn avails emptyFsEnv {- no fixity decls -} ;
- setGblEnv tcg_env $ do {
+ setEnvs tc_envs $ do {
- rn_decls <- rnTyClDecls ldecls ;
- failIfErrsM ;
+ rn_decls <- checkNoErrs $ rnTyClDecls ldecls ;
-- Dump trace of renaming part
rnDump (ppr rn_decls) ;
-- Typecheck them all together so that
-- any mutually recursive types are done right
- tcg_env <- checkNoErrs (tcTyAndClassDecls emptyModDetails rn_decls) ;
- -- Make the new type env available to stuff slurped from interface files
+ -- Just discard the auxiliary bindings; they are generated
+ -- only for Haskell source code, and should already be in Core
+ (tcg_env, _aux_binds) <- tcTyAndClassDecls emptyModDetails rn_decls ;
setGblEnv tcg_env $ do {
+ -- Make the new type env available to stuff slurped from interface files
-- Now the core bindings
core_binds <- initIfaceExtCore (tcExtCoreBindings src_binds) ;
my_exports = map (Avail . idName) bndrs ;
-- ToDo: export the data types also?
- final_type_env = extendTypeEnvWithIds (tcg_type_env tcg_env) bndrs ;
+ final_type_env =
+ extendTypeEnvWithIds (tcg_type_env tcg_env) bndrs ;
mod_guts = ModGuts { mg_module = this_mod,
mg_boot = False,
- mg_usages = [], -- ToDo: compute usage
- mg_dir_imps = [], -- ??
+ mg_used_names = emptyNameSet, -- ToDo: compute usage
+ mg_dir_imps = emptyModuleEnv, -- ??
mg_deps = noDependencies, -- ??
mg_exports = my_exports,
mg_types = final_type_env,
mg_insts = tcg_insts tcg_env,
mg_fam_insts = tcg_fam_insts tcg_env,
+ mg_inst_env = tcg_inst_env tcg_env,
mg_fam_inst_env = tcg_fam_inst_env tcg_env,
mg_rules = [],
+ mg_anns = [],
mg_binds = core_binds,
-- Stubs
mg_rdr_env = emptyGlobalRdrEnv,
mg_fix_env = emptyFixityEnv,
- mg_deprecs = NoDeprecs,
+ mg_warns = NoWarnings,
mg_foreign = NoStubs,
- mg_hpc_info = noHpcInfo,
- mg_modBreaks = emptyModBreaks
+ mg_hpc_info = emptyHpcInfo False,
+ mg_modBreaks = emptyModBreaks,
+ mg_vect_info = noVectInfo
} } ;
tcCoreDump mod_guts ;
return mod_guts
}}}}
+mkFakeGroup :: [LTyClDecl a] -> HsGroup a
mkFakeGroup decls -- Rather clumsy; lots of unused fields
= emptyRdrGroup { hs_tyclds = decls }
\end{code}
-- Even tcSimplifyTop may do some unification.
traceTc (text "Tc9") ;
let { (tcg_env, _) = tc_envs
- ; TcGblEnv { tcg_type_env = type_env, tcg_binds = binds,
- tcg_rules = rules, tcg_fords = fords } = tcg_env
+ ; TcGblEnv { tcg_type_env = type_env,
+ tcg_binds = binds,
+ tcg_rules = rules,
+ tcg_fords = fords } = tcg_env
; all_binds = binds `unionBags` inst_binds } ;
+ failIfErrsM ; -- Don't zonk if there have been errors
+ -- It's a waste of time; and we may get debug warnings
+ -- about strangely-typed TyCons!
+
(bind_ids, binds', fords', rules') <- zonkTopDecls all_binds rules fords ;
+
let { final_type_env = extendTypeEnvWithIds type_env bind_ids
- ; tcg_env' = tcg_env { tcg_type_env = final_type_env,
- tcg_binds = binds',
+ ; tcg_env' = tcg_env { tcg_binds = binds',
tcg_rules = rules',
tcg_fords = fords' } } ;
- return (tcg_env' { tcg_binds = tcg_binds tcg_env' })
+ setGlobalTypeEnv tcg_env' final_type_env
}
tc_rn_src_decls :: ModDetails -> [LHsDecl RdrName] -> TcM (TcGblEnv, TcLclEnv)
-- Loops around dealing with each top level inter-splice group
-- in turn, until it's dealt with the entire module
tc_rn_src_decls boot_details ds
- = do { let { (first_group, group_tail) = findSplice ds } ;
+ = do { (first_group, group_tail) <- findSplice ds ;
-- If ds is [] we get ([], Nothing)
-- Deal with decls up to, but not including, the first splice
- (tcg_env, rn_decls) <- checkNoErrs $ rnTopSrcDecls first_group ;
- -- checkNoErrs: stop if renaming fails
+ (tcg_env, rn_decls) <- rnTopSrcDecls first_group ;
+ -- rnTopSrcDecls fails if there are any errors
(tcg_env, tcl_env) <- setGblEnv tcg_env $
tcTopSrcDecls boot_details rn_decls ;
return (tcg_env, tcl_env)
} ;
- -- If there's a splice, we must carry on
- Just (SpliceDecl splice_expr, rest_ds) -> do {
#ifndef GHCI
+ -- There shouldn't be a splice
+ Just (SpliceDecl {}, _) -> do {
failWithTc (text "Can't do a top-level splice; need a bootstrapped compiler")
#else
+ -- If there's a splice, we must carry on
+ Just (SpliceDecl splice_expr _, rest_ds) -> do {
-- Rename the splice expression, and get its supporting decls
(rn_splice_expr, splice_fvs) <- checkNoErrs (rnLExpr splice_expr) ;
\begin{code}
tcRnHsBootDecls :: [LHsDecl RdrName] -> TcM TcGblEnv
tcRnHsBootDecls decls
- = do { let { (first_group, group_tail) = findSplice decls }
-
- ; case group_tail of
- Just stuff -> spliceInHsBootErr stuff
- Nothing -> return ()
+ = do { (first_group, group_tail) <- findSplice decls
-- Rename the declarations
- ; (tcg_env, rn_group) <- rnTopSrcDecls first_group
+ ; (tcg_env, HsGroup {
+ hs_tyclds = tycl_decls,
+ hs_instds = inst_decls,
+ hs_derivds = deriv_decls,
+ hs_fords = for_decls,
+ hs_defds = def_decls,
+ hs_ruleds = rule_decls,
+ hs_annds = _,
+ hs_valds = val_binds }) <- rnTopSrcDecls first_group
; setGblEnv tcg_env $ do {
- -- Todo: check no foreign decls, no rules, no default decls
+
+ -- Check for illegal declarations
+ ; case group_tail of
+ Just (SpliceDecl d _, _) -> badBootDecl "splice" d
+ Nothing -> return ()
+ ; mapM_ (badBootDecl "foreign") for_decls
+ ; mapM_ (badBootDecl "default") def_decls
+ ; mapM_ (badBootDecl "rule") rule_decls
-- Typecheck type/class decls
; traceTc (text "Tc2")
- ; let tycl_decls = hs_tyclds rn_group
- ; tcg_env <- checkNoErrs (tcTyAndClassDecls emptyModDetails tycl_decls)
+ ; (tcg_env, aux_binds) <- tcTyAndClassDecls emptyModDetails tycl_decls
; setGblEnv tcg_env $ do {
-- Typecheck instance decls
+ -- Family instance declarations are rejected here
; traceTc (text "Tc3")
; (tcg_env, inst_infos, _deriv_binds)
- <- tcInstDecls1 tycl_decls (hs_instds rn_group) (hs_derivds rn_group)
+ <- tcInstDecls1 tycl_decls inst_decls deriv_decls
; setGblEnv tcg_env $ do {
-- Typecheck value declarations
; traceTc (text "Tc5")
- ; val_ids <- tcHsBootSigs (hs_valds rn_group)
+ ; val_ids <- tcHsBootSigs val_binds
-- Wrap up
-- No simplification or zonking to do
-- Make the final type-env
-- Include the dfun_ids so that their type sigs
- -- are written into the interface file
+ -- are written into the interface file.
+ -- And similarly the aux_ids from aux_binds
; let { type_env0 = tcg_type_env gbl_env
; type_env1 = extendTypeEnvWithIds type_env0 val_ids
; type_env2 = extendTypeEnvWithIds type_env1 dfun_ids
- ; dfun_ids = map iDFunId inst_infos }
- ; return (gbl_env { tcg_type_env = type_env2 })
+ ; type_env3 = extendTypeEnvWithIds type_env2 aux_ids
+ ; dfun_ids = map iDFunId inst_infos
+ ; aux_ids = case aux_binds of
+ ValBindsOut _ sigs -> [id | L _ (IdSig id) <- sigs]
+ _ -> panic "tcRnHsBoodDecls"
+ }
+
+ ; setGlobalTypeEnv gbl_env type_env3
}}}}
-spliceInHsBootErr (SpliceDecl (L loc _), _)
- = addErrAt loc (ptext SLIT("Splices are not allowed in hs-boot files"))
+badBootDecl :: String -> Located decl -> TcM ()
+badBootDecl what (L loc _)
+ = addErrAt loc (char 'A' <+> text what
+ <+> ptext (sLit "declaration is not (currently) allowed in a hs-boot file"))
\end{code}
Once we've typechecked the body of the module, we want to compare what
checkHiBootIface
tcg_env@(TcGblEnv { tcg_src = hs_src, tcg_binds = binds,
- tcg_insts = local_insts, tcg_fam_insts = local_fam_insts,
+ tcg_insts = local_insts,
tcg_type_env = local_type_env, tcg_exports = local_exports })
(ModDetails { md_insts = boot_insts, md_fam_insts = boot_fam_insts,
md_types = boot_type_env, md_exports = boot_exports })
-- Check the exports of the boot module, one by one
; mapM_ check_export boot_exports
- -- Check instance declarations
- ; mb_dfun_prs <- mapM check_inst boot_insts
- ; let tcg_env' = tcg_env { tcg_binds = binds `unionBags` dfun_binds,
- tcg_type_env = extendTypeEnvWithIds local_type_env boot_dfuns }
- dfun_prs = catMaybes mb_dfun_prs
- boot_dfuns = map fst dfun_prs
- dfun_binds = listToBag [ noLoc $ VarBind boot_dfun (nlHsVar dfun)
- | (boot_dfun, dfun) <- dfun_prs ]
-
-- Check for no family instances
; unless (null boot_fam_insts) $
panic ("TcRnDriver.checkHiBootIface: Cannot handle family " ++
-- be the equivalent to the dfun bindings returned for class
-- instances? We can't easily equate tycons...
+ -- Check instance declarations
+ ; mb_dfun_prs <- mapM check_inst boot_insts
+ ; let tcg_env' = tcg_env { tcg_binds = binds `unionBags` dfun_binds,
+ tcg_type_env = extendTypeEnvWithIds local_type_env boot_dfuns }
+ dfun_prs = catMaybes mb_dfun_prs
+ boot_dfuns = map fst dfun_prs
+ dfun_binds = listToBag [ mkVarBind boot_dfun (nlHsVar dfun)
+ | (boot_dfun, dfun) <- dfun_prs ]
+
+ ; failIfErrsM
; return tcg_env' }
where
check_export boot_avail -- boot_avail is exported by the boot iface
-- Check that the actual module exports the same thing
| not (null missing_names)
- = addErrTc (missingBootThing (head missing_names) "exported by")
+ = addErrAt (nameSrcSpan (head missing_names))
+ (missingBootThing (head missing_names) "exported by")
-- If the boot module does not *define* the thing, we are done
-- (it simply re-exports it, and names match, so nothing further to do)
-- Check that the actual module also defines the thing, and
-- then compare the definitions
- | Just real_thing <- lookupTypeEnv local_type_env name
- = do { let boot_decl = tyThingToIfaceDecl (fromJust mb_boot_thing)
- real_decl = tyThingToIfaceDecl real_thing
- ; checkTc (checkBootDecl boot_decl real_decl)
- (bootMisMatch real_thing boot_decl real_decl) }
- -- The easiest way to check compatibility is to convert to
- -- iface syntax, where we already have good comparison functions
+ | Just real_thing <- lookupTypeEnv local_type_env name,
+ Just boot_thing <- mb_boot_thing
+ = when (not (checkBootDecl boot_thing real_thing))
+ $ addErrAt (nameSrcSpan (getName boot_thing))
+ (let boot_decl = tyThingToIfaceDecl
+ (fromJust mb_boot_thing)
+ real_decl = tyThingToIfaceDecl real_thing
+ in bootMisMatch real_thing boot_decl real_decl)
| otherwise
= addErrTc (missingBootThing name "defined in")
local_boot_dfun = Id.mkExportedLocalId (idName boot_dfun) boot_inst_ty
+-- This has to compare the TyThing from the .hi-boot file to the TyThing
+-- in the current source file. We must be careful to allow alpha-renaming
+-- where appropriate, and also the boot declaration is allowed to omit
+-- constructors and class methods.
+--
+-- See rnfail055 for a good test of this stuff.
+
+checkBootDecl :: TyThing -> TyThing -> Bool
+
+checkBootDecl (AnId id1) (AnId id2)
+ = ASSERT(id1 == id2)
+ (idType id1 `tcEqType` idType id2)
+
+checkBootDecl (ATyCon tc1) (ATyCon tc2)
+ = checkBootTyCon tc1 tc2
+
+checkBootDecl (AClass c1) (AClass c2)
+ = let
+ (clas_tyvars1, clas_fds1, sc_theta1, _, ats1, op_stuff1)
+ = classExtraBigSig c1
+ (clas_tyvars2, clas_fds2, sc_theta2, _, ats2, op_stuff2)
+ = classExtraBigSig c2
+
+ env0 = mkRnEnv2 emptyInScopeSet
+ env = rnBndrs2 env0 clas_tyvars1 clas_tyvars2
+
+ eqSig (id1, def_meth1) (id2, def_meth2)
+ = idName id1 == idName id2 &&
+ tcEqTypeX env op_ty1 op_ty2 &&
+ def_meth1 == def_meth2
+ where
+ (_, rho_ty1) = splitForAllTys (idType id1)
+ op_ty1 = funResultTy rho_ty1
+ (_, rho_ty2) = splitForAllTys (idType id2)
+ op_ty2 = funResultTy rho_ty2
+
+ eqFD (as1,bs1) (as2,bs2) =
+ eqListBy (tcEqTypeX env) (mkTyVarTys as1) (mkTyVarTys as2) &&
+ eqListBy (tcEqTypeX env) (mkTyVarTys bs1) (mkTyVarTys bs2)
+
+ same_kind tv1 tv2 = eqKind (tyVarKind tv1) (tyVarKind tv2)
+ in
+ eqListBy same_kind clas_tyvars1 clas_tyvars2 &&
+ -- Checks kind of class
+ eqListBy eqFD clas_fds1 clas_fds2 &&
+ (null sc_theta1 && null op_stuff1 && null ats1
+ || -- Above tests for an "abstract" class
+ eqListBy (tcEqPredX env) sc_theta1 sc_theta2 &&
+ eqListBy eqSig op_stuff1 op_stuff2 &&
+ eqListBy checkBootTyCon ats1 ats2)
+
+checkBootDecl (ADataCon dc1) (ADataCon _)
+ = pprPanic "checkBootDecl" (ppr dc1)
+
+checkBootDecl _ _ = False -- probably shouldn't happen
+
----------------
-missingBootThing thing what
- = ppr thing <+> ptext SLIT("is exported by the hs-boot file, but not")
- <+> text what <+> ptext SLIT("the module")
+checkBootTyCon :: TyCon -> TyCon -> Bool
+checkBootTyCon tc1 tc2
+ | not (eqKind (tyConKind tc1) (tyConKind tc2))
+ = False -- First off, check the kind
+
+ | isSynTyCon tc1 && isSynTyCon tc2
+ = ASSERT(tc1 == tc2)
+ let tvs1 = tyConTyVars tc1; tvs2 = tyConTyVars tc2
+ env = rnBndrs2 env0 tvs1 tvs2
+
+ eqSynRhs (OpenSynTyCon k1 _) (OpenSynTyCon k2 _)
+ = tcEqTypeX env k1 k2
+ eqSynRhs (SynonymTyCon t1) (SynonymTyCon t2)
+ = tcEqTypeX env t1 t2
+ eqSynRhs _ _ = False
+ in
+ equalLength tvs1 tvs2 &&
+ eqSynRhs (synTyConRhs tc1) (synTyConRhs tc2)
+
+ | isAlgTyCon tc1 && isAlgTyCon tc2
+ = ASSERT(tc1 == tc2)
+ eqKind (tyConKind tc1) (tyConKind tc2) &&
+ eqListBy tcEqPred (tyConStupidTheta tc1) (tyConStupidTheta tc2) &&
+ eqAlgRhs (algTyConRhs tc1) (algTyConRhs tc2)
+
+ | isForeignTyCon tc1 && isForeignTyCon tc2
+ = eqKind (tyConKind tc1) (tyConKind tc2) &&
+ tyConExtName tc1 == tyConExtName tc2
+
+ | otherwise = False
+ where
+ env0 = mkRnEnv2 emptyInScopeSet
+
+ eqAlgRhs AbstractTyCon _ = True
+ eqAlgRhs OpenTyCon{} OpenTyCon{} = True
+ eqAlgRhs tc1@DataTyCon{} tc2@DataTyCon{} =
+ eqListBy eqCon (data_cons tc1) (data_cons tc2)
+ eqAlgRhs tc1@NewTyCon{} tc2@NewTyCon{} =
+ eqCon (data_con tc1) (data_con tc2)
+ eqAlgRhs _ _ = False
+
+ eqCon c1 c2
+ = dataConName c1 == dataConName c2
+ && dataConIsInfix c1 == dataConIsInfix c2
+ && dataConStrictMarks c1 == dataConStrictMarks c2
+ && dataConFieldLabels c1 == dataConFieldLabels c2
+ && let tvs1 = dataConUnivTyVars c1 ++ dataConExTyVars c1
+ tvs2 = dataConUnivTyVars c2 ++ dataConExTyVars c2
+ env = rnBndrs2 env0 tvs1 tvs2
+ in
+ equalLength tvs1 tvs2 &&
+ eqListBy (tcEqPredX env)
+ (dataConEqTheta c1 ++ dataConDictTheta c1)
+ (dataConEqTheta c2 ++ dataConDictTheta c2) &&
+ eqListBy (tcEqTypeX env)
+ (dataConOrigArgTys c1)
+ (dataConOrigArgTys c2)
+----------------
+missingBootThing :: Name -> String -> SDoc
+missingBootThing name what
+ = ppr name <+> ptext (sLit "is exported by the hs-boot file, but not")
+ <+> text what <+> ptext (sLit "the module")
+
+bootMisMatch :: TyThing -> IfaceDecl -> IfaceDecl -> SDoc
bootMisMatch thing boot_decl real_decl
- = vcat [ppr thing <+> ptext SLIT("has conflicting definitions in the module and its hs-boot file"),
- ptext SLIT("Main module:") <+> ppr real_decl,
- ptext SLIT("Boot file: ") <+> ppr boot_decl]
+ = vcat [ppr thing <+> ptext (sLit "has conflicting definitions in the module and its hs-boot file"),
+ ptext (sLit "Main module:") <+> ppr real_decl,
+ ptext (sLit "Boot file: ") <+> ppr boot_decl]
+instMisMatch :: Instance -> SDoc
instMisMatch inst
= hang (ppr inst)
- 2 (ptext SLIT("is defined in the hs-boot file, but not in the module itself"))
+ 2 (ptext (sLit "is defined in the hs-boot file, but not in the module itself"))
\end{code}
\begin{code}
------------------------------------------------
rnTopSrcDecls :: HsGroup RdrName -> TcM (TcGblEnv, HsGroup Name)
+-- Fails if there are any errors
rnTopSrcDecls group
- = do { -- Bring top level binders into scope
- tcg_env <- importsFromLocalDecls group ;
- setGblEnv tcg_env $ do {
-
- failIfErrsM ; -- No point in continuing if (say) we have duplicate declarations
-
- -- Rename the source decls
- (tcg_env, rn_decls) <- rnSrcDecls group ;
- failIfErrsM ;
+ = do { -- Rename the source decls
+ (tcg_env, rn_decls) <- checkNoErrs $ rnSrcDecls group ;
- -- save the renamed syntax, if we want it
+ -- save the renamed syntax, if we want it
let { tcg_env'
| Just grp <- tcg_rn_decls tcg_env
= tcg_env{ tcg_rn_decls = Just (appendGroups grp rn_decls) }
rnDump (ppr rn_decls) ;
return (tcg_env', rn_decls)
- }}
+ }
------------------------------------------------
tcTopSrcDecls :: ModDetails -> HsGroup Name -> TcM (TcGblEnv, TcLclEnv)
hs_derivds = deriv_decls,
hs_fords = foreign_decls,
hs_defds = default_decls,
+ hs_annds = annotation_decls,
hs_ruleds = rule_decls,
hs_valds = val_binds })
= do { -- Type-check the type and class decls, and all imported decls
-- The latter come in via tycl_decls
traceTc (text "Tc2") ;
- tcg_env <- checkNoErrs (tcTyAndClassDecls boot_details tycl_decls) ;
- -- tcTyAndClassDecls recovers internally, but if anything gave rise to
- -- an error we'd better stop now, to avoid a cascade
+ (tcg_env, aux_binds) <- tcTyAndClassDecls boot_details tycl_decls ;
+ -- If there are any errors, tcTyAndClassDecls fails here
- -- Make these type and class decls available to stuff slurped from interface files
- writeMutVar (tcg_type_env_var tcg_env) (tcg_type_env tcg_env) ;
-
-
setGblEnv tcg_env $ do {
-- Source-language instances, including derivings,
-- and import the supporting declarations
<- tcInstDecls1 tycl_decls inst_decls deriv_decls;
setGblEnv tcg_env $ do {
- -- Foreign import declarations next. No zonking necessary
- -- here; we can tuck them straight into the global environment.
+ -- Foreign import declarations next.
traceTc (text "Tc4") ;
(fi_ids, fi_decls) <- tcForeignImports foreign_decls ;
tcExtendGlobalValEnv fi_ids $ do {
default_tys <- tcDefaults default_decls ;
updGblEnv (\gbl -> gbl { tcg_default = default_tys }) $ do {
+ -- Now GHC-generated derived bindings, generics, and selectors
+ -- Do not generate warnings from compiler-generated code;
+ -- hence the use of discardWarnings
+ (tc_aux_binds, tcl_env) <- discardWarnings (tcTopBinds aux_binds) ;
+ (tc_deriv_binds, tcl_env) <- setLclTypeEnv tcl_env $
+ discardWarnings (tcTopBinds deriv_binds) ;
+
-- Value declarations next
- -- We also typecheck any extra binds that came out
- -- of the "deriving" process (deriv_binds)
traceTc (text "Tc5") ;
- (tc_val_binds, tcl_env) <- tcTopBinds val_binds ;
- setLclTypeEnv tcl_env $ do {
-
- -- Now GHC-generated derived bindings and generics
- -- Do not generate warnings from compiler-generated code
- (tc_deriv_binds, tcl_env) <- discardWarnings $ setOptM Opt_GlasgowExts $
- tcTopBinds deriv_binds ;
+ (tc_val_binds, tcl_env) <- setLclTypeEnv tcl_env $
+ tcTopBinds val_binds;
-- Second pass over class and instance declarations,
traceTc (text "Tc6") ;
- (inst_binds, tcl_env) <- setLclTypeEnv tcl_env $ tcInstDecls2 tycl_decls inst_infos ;
- showLIE (text "after instDecls2") ;
+ (inst_binds, tcl_env) <- setLclTypeEnv tcl_env $
+ tcInstDecls2 tycl_decls inst_infos ;
+ showLIE (text "after instDecls2") ;
+
+ setLclTypeEnv tcl_env $ do { -- Environment doesn't change now
-- Foreign exports
- -- They need to be zonked, so we return them
traceTc (text "Tc7") ;
(foe_binds, foe_decls) <- tcForeignExports foreign_decls ;
+ -- Annotations
+ annotations <- tcAnnotations annotation_decls ;
+
-- Rules
rules <- tcRules rule_decls ;
tcg_env <- getGblEnv ;
let { all_binds = tc_val_binds `unionBags`
tc_deriv_binds `unionBags`
+ tc_aux_binds `unionBags`
inst_binds `unionBags`
- foe_binds ;
+ foe_binds;
-- Extend the GblEnv with the (as yet un-zonked)
-- bindings, rules, foreign decls
tcg_env' = tcg_env { tcg_binds = tcg_binds tcg_env `unionBags` all_binds,
tcg_rules = tcg_rules tcg_env ++ rules,
+ tcg_anns = tcg_anns tcg_env ++ annotations,
tcg_fords = tcg_fords tcg_env ++ foe_decls ++ fi_decls } } ;
return (tcg_env', tcl_env)
}}}}}}
checkMain
= do { tcg_env <- getGblEnv ;
dflags <- getDOpts ;
- let { main_mod = mainModIs dflags ;
- main_fn = case mainFunIs dflags of {
- Just fn -> mkRdrUnqual (mkVarOccFS (mkFastString fn)) ;
- Nothing -> main_RDR_Unqual } } ;
-
- check_main dflags tcg_env main_mod main_fn
+ check_main dflags tcg_env
}
-
-check_main dflags tcg_env main_mod main_fn
+check_main :: DynFlags -> TcGblEnv -> TcM TcGblEnv
+check_main dflags tcg_env
| mod /= main_mod
= traceTc (text "checkMain not" <+> ppr main_mod <+> ppr mod) >>
return tcg_env
| otherwise
- = addErrCtxt mainCtxt $
- do { mb_main <- lookupSrcOcc_maybe main_fn
+ = do { mb_main <- lookupGlobalOccRn_maybe main_fn
-- Check that 'main' is in scope
-- It might be imported from another module!
; case mb_main of {
; complain_no_main
; return tcg_env } ;
Just main_name -> do
- { traceTc (text "checkMain found" <+> ppr main_mod <+> ppr main_fn)
- ; let { rhs = nlHsApp (nlHsVar runMainIOName) (nlHsVar main_name) }
- -- :Main.main :: IO () = runMainIO main
- ; (main_expr, ty) <- setSrcSpan (srcLocSpan (getSrcLoc main_name)) $
- tcInferRho rhs
+ { traceTc (text "checkMain found" <+> ppr main_mod <+> ppr main_fn)
+ ; let loc = srcLocSpan (getSrcLoc main_name)
+ ; ioTyCon <- tcLookupTyCon ioTyConName
+ ; (main_expr, res_ty)
+ <- addErrCtxt mainCtxt $
+ withBox liftedTypeKind $ \res_ty ->
+ tcMonoExpr (L loc (HsVar main_name)) (mkTyConApp ioTyCon [res_ty])
-- See Note [Root-main Id]
+ -- Construct the binding
+ -- :Main.main :: IO res_ty = runMainIO res_ty main
+ ; run_main_id <- tcLookupId runMainIOName
; let { root_main_name = mkExternalName rootMainKey rOOT_MAIN
- (mkVarOccFS FSLIT("main"))
- (getSrcLoc main_name)
- ; root_main_id = Id.mkExportedLocalId root_main_name ty
- ; main_bind = noLoc (VarBind root_main_id main_expr) }
-
- ; return (tcg_env { tcg_binds = tcg_binds tcg_env
+ (mkVarOccFS (fsLit "main"))
+ (getSrcSpan main_name)
+ ; root_main_id = Id.mkExportedLocalId root_main_name
+ (mkTyConApp ioTyCon [res_ty])
+ ; co = mkWpTyApps [res_ty]
+ ; rhs = nlHsApp (mkLHsWrap co (nlHsVar run_main_id)) main_expr
+ ; main_bind = mkVarBind root_main_id rhs }
+
+ ; return (tcg_env { tcg_main = Just main_name,
+ tcg_binds = tcg_binds tcg_env
`snocBag` main_bind,
tcg_dus = tcg_dus tcg_env
`plusDU` usesOnly (unitFV main_name)
-- Record the use of 'main', so that we don't
-- complain about it being defined but not used
- })
+ })
}}}
where
- mod = tcg_mod tcg_env
-
+ mod = tcg_mod tcg_env
+ main_mod = mainModIs dflags
+ main_fn = getMainFun dflags
+
complain_no_main | ghcLink dflags == LinkInMemory = return ()
| otherwise = failWithTc noMainMsg
-- In interactive mode, don't worry about the absence of 'main'
-- In other modes, fail altogether, so that we don't go on
-- and complain a second time when processing the export list.
- mainCtxt = ptext SLIT("When checking the type of the main function") <+> quotes (ppr main_fn)
- noMainMsg = ptext SLIT("The main function") <+> quotes (ppr main_fn)
- <+> ptext SLIT("is not defined in module") <+> quotes (ppr main_mod)
+ mainCtxt = ptext (sLit "When checking the type of the") <+> pp_main_fn
+ noMainMsg = ptext (sLit "The") <+> pp_main_fn
+ <+> ptext (sLit "is not defined in module") <+> quotes (ppr main_mod)
+ pp_main_fn = ppMainFn main_fn
+
+ppMainFn :: RdrName -> SDoc
+ppMainFn main_fn
+ | main_fn == main_RDR_Unqual
+ = ptext (sLit "function") <+> quotes (ppr main_fn)
+ | otherwise
+ = ptext (sLit "main function") <+> quotes (ppr main_fn)
+
+-- | Get the unqualified name of the function to use as the \"main\" for the main module.
+-- Either returns the default name or the one configured on the command line with -main-is
+getMainFun :: DynFlags -> RdrName
+getMainFun dflags = case (mainFunIs dflags) of
+ Just fn -> mkRdrUnqual (mkVarOccFS (mkFastString fn))
+ Nothing -> main_RDR_Unqual
+
+checkMainExported :: TcGblEnv -> TcM ()
+checkMainExported tcg_env = do
+ dflags <- getDOpts
+ case tcg_main tcg_env of
+ Nothing -> return () -- not the main module
+ Just main_name -> do
+ let main_mod = mainModIs dflags
+ checkTc (main_name `elem` concatMap availNames (tcg_exports tcg_env)) $
+ ptext (sLit "The") <+> ppMainFn (nameRdrName main_name) <+>
+ ptext (sLit "is not exported by module") <+> quotes (ppr main_mod)
\end{code}
Note [Root-main Id]
#ifdef GHCI
setInteractiveContext :: HscEnv -> InteractiveContext -> TcRn a -> TcRn a
setInteractiveContext hsc_env icxt thing_inside
- = let
- -- Initialise the tcg_inst_env with instances
- -- from all home modules. This mimics the more selective
- -- call to hptInstances in tcRnModule
- dfuns = hptInstances hsc_env (\mod -> True)
+ = let -- Initialise the tcg_inst_env with instances from all home modules.
+ -- This mimics the more selective call to hptInstances in tcRnModule.
+ (home_insts, home_fam_insts) = hptInstances hsc_env (\_ -> True)
in
updGblEnv (\env -> env {
- tcg_rdr_env = ic_rn_gbl_env icxt,
- tcg_inst_env = extendInstEnvList (tcg_inst_env env) dfuns }) $
-
-
- tcExtendIdEnv (reverse (ic_tmp_ids icxt)) $
- -- tcExtendIdEnv does lots:
+ tcg_rdr_env = ic_rn_gbl_env icxt,
+ tcg_inst_env = extendInstEnvList (tcg_inst_env env) home_insts,
+ tcg_fam_inst_env = extendFamInstEnvList (tcg_fam_inst_env env)
+ home_fam_insts
+ }) $
+
+ tcExtendGhciEnv (ic_tmp_ids icxt) $
+ -- tcExtendGhciEnv does lots:
-- - it extends the local type env (tcl_env) with the given Ids,
-- - it extends the local rdr env (tcl_rdr) with the Names from
-- the given Ids
-- - it adds the free tyvars of the Ids to the tcl_tyvars
-- set.
--
- -- earlier ids in ic_tmp_ids must shadow later ones with the same
- -- OccName, but tcExtendIdEnv has the opposite behaviour, hence the
- -- reverse above.
+ -- later ids in ic_tmp_ids must shadow earlier ones with the same
+ -- OccName, and tcExtendIdEnv implements this behaviour.
do { traceTc (text "setIC" <+> ppr (ic_tmp_ids icxt))
; thing_inside }
tcRnStmt :: HscEnv
-> InteractiveContext
-> LStmt RdrName
- -> IO (Maybe ([Id], LHsExpr Id))
+ -> IO (Messages, Maybe ([Id], LHsExpr Id))
-- The returned [Id] is the list of new Ids bound by
-- this statement. It can be used to extend the
-- InteractiveContext via extendInteractiveContext.
setInteractiveContext hsc_env ictxt $ do {
-- Rename; use CmdLineMode because tcRnStmt is only used interactively
- (([rn_stmt], _), fvs) <- rnStmts DoExpr [rdr_stmt] (return ((), emptyFVs)) ;
+ (([rn_stmt], _), fvs) <- rnStmts GhciStmt [rdr_stmt] (return ((), emptyFVs)) ;
traceRn (text "tcRnStmt" <+> vcat [ppr rdr_stmt, ppr rn_stmt, ppr fvs]) ;
failIfErrsM ;
+ rnDump (ppr rn_stmt) ;
-- The real work is done here
(bound_ids, tc_expr) <- mkPlan rn_stmt ;
-- None of the Ids should be of unboxed type, because we
-- cast them all to HValues in the end!
- mappM bad_unboxed (filter (isUnLiftedType . idType) zonked_ids) ;
+ mapM_ bad_unboxed (filter (isUnLiftedType . idType) zonked_ids) ;
traceTc (text "tcs 1") ;
- let { -- (a) Make all the bound ids "global" ids, now that
- -- they're notionally top-level bindings. This is
- -- important: otherwise when we come to compile an expression
- -- using these ids later, the byte code generator will consider
- -- the occurrences to be free rather than global.
- --
- -- (b) Tidy their types; this is important, because :info may
- -- ask to look at them, and :info expects the things it looks
- -- up to have tidy types
- global_ids = map globaliseAndTidy zonked_ids ;
-
+ let { global_ids = map globaliseAndTidyId zonked_ids } ;
+ -- Note [Interactively-bound Ids in GHCi]
+
{- ---------------------------------------------
At one stage I removed any shadowed bindings from the type_env;
they are inaccessible but might, I suppose, cause a space leak if we leave them there.
Hence this code is commented out
-------------------------------------------------- -}
- } ;
dumpOptTcRn Opt_D_dump_tc
(vcat [text "Bound Ids" <+> pprWithCommas ppr global_ids,
text "Typechecked expr" <+> ppr zonked_expr]) ;
- returnM (global_ids, zonked_expr)
+ return (global_ids, zonked_expr)
}
where
- bad_unboxed id = addErr (sep [ptext SLIT("GHCi can't bind a variable of unlifted type:"),
+ bad_unboxed id = addErr (sep [ptext (sLit "GHCi can't bind a variable of unlifted type:"),
nest 2 (ppr id <+> dcolon <+> ppr (idType id))])
-
-globaliseAndTidy :: Id -> Id
-globaliseAndTidy id
--- Give the Id a Global Name, and tidy its type
- = Id.setIdType (globaliseId VanillaGlobal id) tidy_type
- where
- tidy_type = tidyTopType (idType id)
\end{code}
+Note [Interactively-bound Ids in GHCi]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+The Ids bound by previous Stmts in Template Haskell are currently
+ a) GlobalIds
+ b) with an Internal Name (not External)
+ c) and a tidied type
+
+ (a) They must be GlobalIds (not LocalIds) otherwise when we come to
+ compile an expression using these ids later, the byte code
+ generator will consider the occurrences to be free rather than
+ global.
+
+ (b) They retain their Internal names becuase we don't have a suitable
+ Module to name them with. We could revisit this choice.
+
+ (c) Their types are tidied. This is important, because :info may ask
+ to look at them, and :info expects the things it looks up to have
+ tidy types
+
+
+--------------------------------------------------------------------------
+ Typechecking Stmts in GHCi
+
Here is the grand plan, implemented in tcUserStmt
What you type The IO [HValue] that hscStmt returns
; runPlans [ -- Plan A
do { stuff@([it_id], _) <- tcGhciStmts [bind_stmt, print_it]
; it_ty <- zonkTcType (idType it_id)
- ; ifM (isUnitTy it_ty) failM
+ ; when (isUnitTy it_ty) failM
; return stuff },
-- Plan B; a naked bind statment
-- The two-step process avoids getting two errors: one from
-- the expression itself, and one from the 'print it' part
-- This two-step story is very clunky, alas
- do { checkNoErrs (tcGhciStmts [let_stmt])
+ do { _ <- checkNoErrs (tcGhciStmts [let_stmt])
--- checkNoErrs defeats the error recovery of let-bindings
; tcGhciStmts [let_stmt, print_it] }
]}
mkPlan stmt@(L loc (BindStmt {}))
- | [L _ v] <- collectLStmtBinders stmt -- One binder, for a bind stmt
+ | [v] <- collectLStmtBinders stmt -- One binder, for a bind stmt
= do { let print_v = L loc $ ExprStmt (nlHsApp (nlHsVar printName) (nlHsVar v))
(HsVar thenIOName) placeHolderType
; let print_plan = do
{ stuff@([v_id], _) <- tcGhciStmts [stmt, print_v]
; v_ty <- zonkTcType (idType v_id)
- ; ifM (isUnitTy v_ty || not (isTauTy v_ty)) failM
+ ; when (isUnitTy v_ty || not (isTauTy v_ty)) failM
; return stuff }
-- The plans are:
= do { ioTyCon <- tcLookupTyCon ioTyConName ;
ret_id <- tcLookupId returnIOName ; -- return @ IO
let {
- io_ty = mkTyConApp ioTyCon [] ;
ret_ty = mkListTy unitTy ;
io_ret_ty = mkTyConApp ioTyCon [ret_ty] ;
- tc_io_stmts stmts = tcStmts DoExpr (tcDoStmt io_ty) stmts
- (emptyRefinement, io_ret_ty) ;
+ tc_io_stmts stmts = tcStmts GhciStmt tcDoStmt stmts io_ret_ty ;
- names = map unLoc (collectLStmtsBinders stmts) ;
+ names = collectLStmtsBinders stmts ;
-- mk_return builds the expression
-- returnIO @ [()] [coerce () x, .., coerce () z]
} ;
-- OK, we're ready to typecheck the stmts
- traceTc (text "tcs 2") ;
+ traceTc (text "TcRnDriver.tcGhciStmts: tc stmts") ;
((tc_stmts, ids), lie) <- getLIE $ tc_io_stmts stmts $ \ _ ->
- mappM tcLookupId names ;
+ mapM tcLookupId names ;
-- Look up the names right in the middle,
-- where they will all be in scope
-- Simplify the context
+ traceTc (text "TcRnDriver.tcGhciStmts: simplify ctxt") ;
const_binds <- checkNoErrs (tcSimplifyInteractive lie) ;
-- checkNoErrs ensures that the plan fails if context redn fails
+ traceTc (text "TcRnDriver.tcGhciStmts: done") ;
return (ids, mkHsDictLet const_binds $
- noLoc (HsDo DoExpr tc_stmts (mk_return ids) io_ret_ty))
+ noLoc (HsDo GhciStmt tc_stmts (mk_return ids) io_ret_ty))
}
\end{code}
tcRnExpr :: HscEnv
-> InteractiveContext
-> LHsExpr RdrName
- -> IO (Maybe Type)
+ -> IO (Messages, Maybe Type)
tcRnExpr hsc_env ictxt rdr_expr
= initTcPrintErrors hsc_env iNTERACTIVE $
setInteractiveContext hsc_env ictxt $ do {
- (rn_expr, fvs) <- rnLExpr rdr_expr ;
+ (rn_expr, _fvs) <- rnLExpr rdr_expr ;
failIfErrsM ;
-- Now typecheck the expression;
-- it might have a rank-2 type (e.g. :t runST)
- ((tc_expr, res_ty), lie) <- getLIE (tcInferRho rn_expr) ;
+ ((_tc_expr, res_ty), lie) <- getLIE (tcInferRho rn_expr) ;
((qtvs, dict_insts, _), lie_top) <- getLIE (tcSimplifyInfer smpl_doc (tyVarsOfType res_ty) lie) ;
- tcSimplifyInteractive lie_top ;
+ _ <- tcSimplifyInteractive lie_top ; -- Ignore the dicionary bindings
let { all_expr_ty = mkForAllTys qtvs $
mkFunTys (map (idType . instToId) dict_insts) $
zonkTcType all_expr_ty
}
where
- smpl_doc = ptext SLIT("main expression")
+ smpl_doc = ptext (sLit "main expression")
\end{code}
tcRnType just finds the kind of a type
tcRnType :: HscEnv
-> InteractiveContext
-> LHsType RdrName
- -> IO (Maybe Kind)
+ -> IO (Messages, Maybe Kind)
tcRnType hsc_env ictxt rdr_type
= initTcPrintErrors hsc_env iNTERACTIVE $
setInteractiveContext hsc_env ictxt $ do {
failIfErrsM ;
-- Now kind-check the type
- (ty', kind) <- kcHsType rn_type ;
+ (_ty', kind) <- kcLHsType rn_type ;
return kind
}
where
- doc = ptext SLIT("In GHCi input")
+ doc = ptext (sLit "In GHCi input")
#endif /* GHCi */
\end{code}
\begin{code}
#ifdef GHCI
--- ASSUMES that the module is either in the HomePackageTable or is
+-- | ASSUMES that the module is either in the 'HomePackageTable' or is
-- a package module with an interface on disk. If neither of these is
-- true, then the result will be an error indicating the interface
-- could not be found.
-- argument).
tcGetModuleExports :: Module -> [Module] -> TcM [AvailInfo]
tcGetModuleExports mod directlyImpMods
- = do { let doc = ptext SLIT("context for compiling statements")
+ = do { let doc = ptext (sLit "context for compiling statements")
; iface <- initIfaceTcRn $ loadSysInterface doc mod
-- Load any orphan-module and family instance-module
; ifaceExportNames (mi_exports iface)
}
-tcRnLookupRdrName :: HscEnv -> RdrName -> IO (Maybe [Name])
+tcRnLookupRdrName :: HscEnv -> RdrName -> IO (Messages, Maybe [Name])
tcRnLookupRdrName hsc_env rdr_name
= initTcPrintErrors hsc_env iNTERACTIVE $
setInteractiveContext hsc_env (hsc_IC hsc_env) $
lookup_rdr_name rdr_name
+lookup_rdr_name :: RdrName -> TcM [Name]
lookup_rdr_name rdr_name = do {
-- If the identifier is a constructor (begins with an
-- upper-case letter), then we need to consider both
return good_names
}
-tcRnRecoverDataCon :: HscEnv -> Ptr () -> IO (Maybe DataCon)
-tcRnRecoverDataCon hsc_env ptr
- = initTcPrintErrors hsc_env iNTERACTIVE $
- setInteractiveContext hsc_env (hsc_IC hsc_env) $ do
- name <- dataConInfoPtrToName ptr
- tcLookupDataCon name
-
-tcRnLookupName :: HscEnv -> Name -> IO (Maybe TyThing)
+tcRnLookupName :: HscEnv -> Name -> IO (Messages, Maybe TyThing)
tcRnLookupName hsc_env name
= initTcPrintErrors hsc_env iNTERACTIVE $
setInteractiveContext hsc_env (hsc_IC hsc_env) $
tcRnGetInfo :: HscEnv
-> Name
- -> IO (Maybe (TyThing, Fixity, [Instance]))
+ -> IO (Messages, Maybe (TyThing, Fixity, [Instance]))
--- Used to implemnent :info in GHCi
+-- Used to implement :info in GHCi
--
-- Look up a RdrName and return all the TyThings it might be
-- A capitalised RdrName is given to us in the DataName namespace,
-- in the home package all relevant modules are loaded.)
loadUnqualIfaces ictxt
- thing <- tcRnLookupName' name
+ thing <- tcRnLookupName' name
fixity <- lookupFixityRn name
- ispecs <- lookupInsts (icPrintUnqual ictxt) thing
+ ispecs <- lookupInsts thing
return (thing, fixity, ispecs)
-lookupInsts :: PrintUnqualified -> TyThing -> TcM [Instance]
--- Filter the instances by the ones whose tycons (or clases resp)
--- are in scope unqualified. Otherwise we list a whole lot too many!
-lookupInsts print_unqual (AClass cls)
+lookupInsts :: TyThing -> TcM [Instance]
+lookupInsts (AClass cls)
= do { inst_envs <- tcGetInstEnvs
- ; return [ ispec
- | ispec <- classInstances inst_envs cls
- , plausibleDFun print_unqual (instanceDFunId ispec) ] }
-
-lookupInsts print_unqual (ATyCon tc)
- = do { eps <- getEps -- Load all instances for all classes that are
- -- in the type environment (which are all the ones
- -- we've seen in any interface file so far)
- ; (pkg_ie, home_ie) <- tcGetInstEnvs -- Search all
- ; return [ ispec
+ ; return (classInstances inst_envs cls) }
+
+lookupInsts (ATyCon tc)
+ = do { (pkg_ie, home_ie) <- tcGetInstEnvs
+ -- Load all instances for all classes that are
+ -- in the type environment (which are all the ones
+ -- we've seen in any interface file so far)
+ ; return [ ispec -- Search all
| ispec <- instEnvElts home_ie ++ instEnvElts pkg_ie
, let dfun = instanceDFunId ispec
- , relevant dfun
- , plausibleDFun print_unqual dfun ] }
+ , relevant dfun ] }
where
relevant df = tc_name `elemNameSet` tyClsNamesOfDFunHead (idType df)
tc_name = tyConName tc
-lookupInsts print_unqual other = return []
-
-plausibleDFun print_unqual dfun -- Dfun involving only names that print unqualified
- = all ok (nameSetToList (tyClsNamesOfType (idType dfun)))
- where
- ok name | isBuiltInSyntax name = True
- | isExternalName name =
- isNothing $ fst print_unqual (nameModule name)
- (nameOccName name)
- | otherwise = True
+lookupInsts _ = return []
loadUnqualIfaces :: InteractiveContext -> TcM ()
-- Load the home module for everything that is in scope unqualified
not (isInternalName name),
isTcOcc (nameOccName name), -- Types and classes only
unQualOK gre ] -- In scope unqualified
- doc = ptext SLIT("Need interface for module whose export(s) are in scope unqualified")
+ doc = ptext (sLit "Need interface for module whose export(s) are in scope unqualified")
#endif /* GHCI */
\end{code}
= do { dflags <- getDOpts ;
-- Dump short output if -ddump-types or -ddump-tc
- ifM (dopt Opt_D_dump_types dflags || dopt Opt_D_dump_tc dflags)
- (dumpTcRn short_dump) ;
+ when (dopt Opt_D_dump_types dflags || dopt Opt_D_dump_tc dflags)
+ (dumpTcRn short_dump) ;
-- Dump bindings if -ddump-tc
dumpOptTcRn Opt_D_dump_tc (mkDumpDoc "Typechecker" full_dump)
-- NB: foreign x-d's have undefined's in their types;
-- hence can't show the tc_fords
+tcCoreDump :: ModGuts -> TcM ()
tcCoreDump mod_guts
= do { dflags <- getDOpts ;
- ifM (dopt Opt_D_dump_types dflags || dopt Opt_D_dump_tc dflags)
- (dumpTcRn (pprModGuts mod_guts)) ;
+ when (dopt Opt_D_dump_types dflags || dopt Opt_D_dump_tc dflags)
+ (dumpTcRn (pprModGuts mod_guts)) ;
-- Dump bindings if -ddump-tc
dumpOptTcRn Opt_D_dump_tc (mkDumpDoc "Typechecker" full_dump) }
, ppr_fam_insts fam_insts
, vcat (map ppr rules)
, ppr_gen_tycons (typeEnvTyCons type_env)
- , ptext SLIT("Dependent modules:") <+> ppr (eltsUFM (imp_dep_mods imports))
- , ptext SLIT("Dependent packages:") <+> ppr (imp_dep_pkgs imports)]
+ , ptext (sLit "Dependent modules:") <+>
+ ppr (sortBy cmp_mp $ eltsUFM (imp_dep_mods imports))
+ , ptext (sLit "Dependent packages:") <+>
+ ppr (sortBy stablePackageIdCmp $ imp_dep_pkgs imports)]
+ where -- The two uses of sortBy are just to reduce unnecessary
+ -- wobbling in testsuite output
+ cmp_mp (mod_name1, is_boot1) (mod_name2, is_boot2)
+ = (mod_name1 `stableModuleNameCmp` mod_name2)
+ `thenCmp`
+ (is_boot1 `compare` is_boot2)
pprModGuts :: ModGuts -> SDoc
pprModGuts (ModGuts { mg_types = type_env,
where
le_sig tycon1 tycon2 = getOccName tycon1 <= getOccName tycon2
ppr_tycon tycon
- | isCoercionTyCon tycon = ptext SLIT("coercion") <+> ppr tycon
+ | isCoercionTyCon tycon
+ = sep [ptext (sLit "coercion") <+> ppr tycon <+> ppr tvs
+ , nest 2 (dcolon <+> pprEqPred (coercionKind (mkTyConApp tycon (mkTyVarTys tvs))))]
| otherwise = ppr (tyThingToIfaceDecl (ATyCon tycon))
+ where
+ tvs = take (tyConArity tycon) alphaTyVars
ppr_rules :: [CoreRule] -> SDoc
ppr_rules [] = empty
-ppr_rules rs = vcat [ptext SLIT("{-# RULES"),
+ppr_rules rs = vcat [ptext (sLit "{-# RULES"),
nest 4 (pprRules rs),
- ptext SLIT("#-}")]
+ ptext (sLit "#-}")]
+ppr_gen_tycons :: [TyCon] -> SDoc
ppr_gen_tycons [] = empty
-ppr_gen_tycons tcs = vcat [ptext SLIT("Tycons with generics:"),
+ppr_gen_tycons tcs = vcat [ptext (sLit "Tycons with generics:"),
nest 2 (fsep (map ppr (filter tyConHasGenerics tcs)))]
\end{code}
projects / ghc-hetmet.git / blobdiff