#include "HsVersions.h"
#ifdef GHCI
-import {-# SOURCE #-} TcSplice( tcSpliceDecls )
+import {-# SOURCE #-} TcSplice ( tcSpliceDecls )
+import DsMeta ( templateHaskellNames )
#endif
import CmdLineOpts ( DynFlag(..), opt_PprStyle_Debug, dopt )
-import HsSyn ( HsModule(..), HsBinds(..), MonoBinds(..), HsDecl(..), HsExpr(..),
+import HsSyn ( HsModule(..), HsBinds(..), MonoBinds(..), HsExpr(..),
Stmt(..), Pat(VarPat), HsStmtContext(..), RuleDecl(..),
- HsGroup(..),
+ HsGroup(..), SpliceDecl(..),
mkSimpleMatch, placeHolderType, toHsType, andMonoBinds,
isSrcRule, collectStmtsBinders
)
import RdrName ( RdrName, getRdrName, mkUnqual, mkRdrUnqual,
lookupRdrEnv, elemRdrEnv )
-import RnHsSyn ( RenamedHsDecl, RenamedStmt, RenamedTyClDecl,
+import RnHsSyn ( RenamedStmt, RenamedTyClDecl,
ruleDeclFVs, instDeclFVs, tyClDeclFVs )
import TcHsSyn ( TypecheckedHsExpr, TypecheckedRuleDecl,
zonkTopBinds, zonkTopDecls, mkHsLet,
import RnNames ( rnImports, exportsFromAvail, reportUnusedNames )
import RnIfaces ( slurpImpDecls, checkVersions, RecompileRequired, outOfDate )
import RnHiFiles ( readIface, loadOldIface )
-import RnEnv ( lookupSrcName, lookupOccRn,
+import RnEnv ( lookupSrcName, lookupOccRn, plusGlobalRdrEnv,
ubiquitousNames, implicitModuleFVs, implicitStmtFVs, dataTcOccs )
import RnExpr ( rnStmts, rnExpr )
import RnNames ( importsFromLocalDecls )
import Id ( Id, mkLocalId, isLocalId, idName, idType, idUnfolding, setIdLocalExported )
import IdInfo ( GlobalIdDetails(..) )
import Var ( Var, setGlobalIdDetails )
-import Module ( Module, moduleName, moduleUserString )
+import Module ( Module, moduleName, moduleUserString, moduleEnvElts )
import Name ( Name, isExternalName, getSrcLoc, nameOccName )
import NameEnv ( delListFromNameEnv )
import NameSet
ModIface, ModDetails(..), ModGuts(..),
HscEnv(..),
ModIface(..), ModDetails(..), IfaceDecls(..),
- GhciMode(..),
+ GhciMode(..), noDependencies,
Deprecations(..), plusDeprecs,
emptyGlobalRdrEnv,
GenAvailInfo(Avail), availsToNameSet,
#ifdef GHCI
import RdrName ( rdrEnvElts )
import RnHiFiles ( loadInterface )
-import RnEnv ( mkGlobalRdrEnv, plusGlobalRdrEnv )
+import RnEnv ( mkGlobalRdrEnv )
import HscTypes ( GlobalRdrElt(..), GlobalRdrEnv, ImportReason(..), Provenance(..),
isLocalGRE )
#endif
do { -- Deal with imports; sets tcg_rdr_env, tcg_imports
(rdr_env, imports) <- rnImports import_decls ;
updGblEnv ( \ gbl -> gbl { tcg_rdr_env = rdr_env,
- tcg_imports = imports })
+ tcg_imports = tcg_imports gbl `plusImportAvails` imports })
$ do {
- traceRn (text "rn1") ;
+ traceRn (text "rn1" <+> ppr (imp_dep_mods imports)) ;
-- Fail if there are any errors so far
-- The error printing (if needed) takes advantage
-- of the tcg_env we have now set
updGblEnv (\gbl -> gbl { tcg_deprecs = tcg_deprecs gbl `plusDeprecs` mod_deprecs })
$ do {
- traceRn (text "rn4") ;
-- Process the export list
export_avails <- exportsFromAvail exports ;
updGblEnv (\gbl -> gbl { tcg_exports = export_avails })
-> RdrNameStmt
-> IO (PersistentCompilerState,
Maybe (InteractiveContext, [Name], TypecheckedHsExpr))
- -- The returned [Id] is the same as the input except for
+ -- The returned [Name] is the same as the input except for
-- ExprStmt, in which case the returned [Name] is [itName]
+ --
+ -- The returned TypecheckedHsExpr is of type IO [ () ],
+ -- a list of the bound values, coerced to ().
tcRnStmt hsc_env pcs ictxt rdr_stmt
= initTc hsc_env pcs iNTERACTIVE $
do { addMessages (head msgs_s) ; failM }
else do {
- mapM_ addMessages msgs_s ; -- Add deprecation warnings
- mapM tcLookupGlobal names -- and lookup up the entities
- }}
+ -- Add deprecation warnings
+ mapM_ addMessages msgs_s ;
+
+ -- Slurp in the supporting declarations
+ tcg_env <- importSupportingDecls (mkFVs names) ;
+ setGblEnv tcg_env $ do {
+
+ -- And lookup up the entities
+ mapM tcLookupGlobal names
+ }}}
\end{code}
mod_guts = ModGuts { mg_module = this_mod,
mg_usages = [], -- ToDo: compute usage
mg_dir_imps = [], -- ??
+ mg_deps = noDependencies, -- ??
mg_exports = my_exports,
mg_types = final_type_env,
mg_insts = tcg_insts tcg_env,
-- Type check the decls up to, but not including, the first splice
(tcg_env, src_fvs1) <- tcRnGroup first_group ;
- -- If there is no splice, we're done
- case group_tail of
- Nothing -> return (tcg_env, src_fvs1)
- Just (splice_expr, rest_ds) -> do {
+ -- Bale out if errors; for example, error recovery when checking
+ -- the RHS of 'main' can mean that 'main' is not in the envt for
+ -- the subsequent checkMain test
+ failIfErrsM ;
+ -- If there is no splice, we're done
+ case group_tail of {
+ Nothing -> return (tcg_env, src_fvs1) ;
+ Just (SpliceDecl splice_expr splice_loc, rest_ds) ->
+#ifndef GHCI
+ failWithTc (text "Can't do a top-level splice; need a bootstrapped compiler")
+#else
setGblEnv tcg_env $ do {
-
+
-- Rename the splice expression, and get its supporting decls
- (rn_splice_expr, fvs) <- initRn SourceMode (rnExpr splice_expr) ;
- tcg_env <- importSupportingDecls fvs ;
+ (rn_splice_expr, fvs) <- initRn SourceMode $
+ addSrcLoc splice_loc $
+ rnExpr splice_expr ;
+ tcg_env <- importSupportingDecls (fvs `plusFV` templateHaskellNames) ;
setGblEnv tcg_env $ do {
-- Execute the splice
(tcg_env, src_fvs2) <- tcRnSrcDecls (spliced_decls ++ rest_ds) ;
return (tcg_env, src_fvs1 `plusFV` src_fvs2)
- }}}}
+ }}
+#endif /* GHCI */
+ }}
\end{code}
tcg_imports gbl })
$ do {
+ failIfErrsM ; -- No point in continuing if (say) we have duplicate declarations
+
-- Rename the source decls
(tcg_env, rn_src_decls, src_fvs) <- initRn SourceMode (rnSrcDecls group) ;
setGblEnv tcg_env $ do {
------------------------------------------------
tcTopSrcDecls :: HsGroup Name -> TcM TcGblEnv
tcTopSrcDecls rn_decls
- = fixM (\ unf_env -> do {
- -- Loop back the final environment, including the fully zonked
- -- versions of bindings from this module. In the presence of mutual
- -- recursion, interface type signatures may mention variables defined
- -- in this module, which is why the knot is so big
-
- -- Do the main work
- ((tcg_env, binds, rules, fords), lie) <- getLIE (
- tc_src_decls unf_env rn_decls
+ = do { -- Do the main work
+ ((tcg_env, lcl_env, binds, rules, fords), lie) <- getLIE (
+ tc_src_decls rn_decls
) ;
-- tcSimplifyTop deals with constant or ambiguous InstIds.
-- type. (Usually, ambiguous type variables are resolved
-- during the generalisation step.)
traceTc (text "Tc8") ;
- inst_binds <- setGblEnv tcg_env (tcSimplifyTop lie) ;
+ inst_binds <- setGblEnv tcg_env $
+ setLclTypeEnv lcl_env $
+ tcSimplifyTop lie ;
-- The setGblEnv exposes the instances to tcSimplifyTop
+ -- The setLclTypeEnv exposes the local Ids, so that
+ -- we get better error messages (monomorphism restriction)
-- Backsubstitution. This must be done last.
-- Even tcSimplifyTop may do some unification.
traceTc (text "Tc9") ;
- (ids, binds', fords', rules') <- zonkTopDecls (binds `andMonoBinds` inst_binds)
- rules fords ;
+ (bind_ids, binds', fords', rules') <- zonkTopDecls (binds `andMonoBinds` inst_binds)
+ rules fords ;
- let { tcg_env' = tcg_env { tcg_type_env = extendTypeEnvWithIds (tcg_type_env tcg_env) ids,
+ let { tcg_env' = tcg_env { tcg_type_env = extendTypeEnvWithIds (tcg_type_env tcg_env)
+ bind_ids,
tcg_binds = tcg_binds tcg_env `andMonoBinds` binds',
tcg_rules = tcg_rules tcg_env ++ rules',
tcg_fords = tcg_fords tcg_env ++ fords' } } ;
return tcg_env'
- })
+ }
-tc_src_decls unf_env
+tc_src_decls
(HsGroup { hs_tyclds = tycl_decls,
hs_instds = inst_decls,
hs_fords = foreign_decls,
hs_valds = val_binds })
= do { -- Type-check the type and class decls, and all imported decls
traceTc (text "Tc2") ;
- tcg_env <- tcTyClDecls unf_env tycl_decls ;
+ tcg_env <- tcTyClDecls tycl_decls ;
setGblEnv tcg_env $ do {
-- Source-language instances, including derivings,
cls_dm_binds `AndMonoBinds`
foe_binds } ;
- return (tcg_env, all_binds, src_rules, foe_decls)
+ return (tcg_env, lcl_env, all_binds, src_rules, foe_decls)
}}}}}}}}}
\end{code}
\begin{code}
-tcTyClDecls :: RecTcGblEnv
- -> [RenamedTyClDecl]
+tcTyClDecls :: [RenamedTyClDecl]
-> TcM TcGblEnv
-- tcTyClDecls deals with
-- persistent compiler state to reflect the things imported from
-- other modules
-tcTyClDecls unf_env tycl_decls
- -- (unf_env :: RecTcGblEnv) is used for type-checking interface pragmas
- -- which is done lazily [ie failure just drops the pragma
- -- without having any global-failure effect].
-
+tcTyClDecls tycl_decls
= checkNoErrs $
-- tcTyAndClassDecls recovers internally, but if anything gave rise to
-- an error we'd better stop now, to avoid a cascade
traceTc (text "TyCl1") `thenM_`
tcTyAndClassDecls tycl_decls `thenM` \ tycl_things ->
tcExtendGlobalEnv tycl_things $
-
- -- Interface type signatures
- -- We tie a knot so that the Ids read out of interfaces are in scope
- -- when we read their pragmas.
- -- What we rely on is that pragmas are typechecked lazily; if
- -- any type errors are found (ie there's an inconsistency)
- -- we silently discard the pragma
- traceTc (text "TyCl2") `thenM_`
- tcInterfaceSigs unf_env tycl_decls `thenM` \ sig_ids ->
- tcExtendGlobalValEnv sig_ids $
-
- getGblEnv -- Return the TcLocals environment
+
+ traceTc (text "TyCl2") `thenM_`
+ tcInterfaceSigs tycl_decls `thenM` \ tcg_env ->
+ -- Returns the extended environment
+
+ returnM tcg_env
\end{code}
hs_instds = inst_decls,
hs_ruleds = rule_decls })
= do { -- Typecheck the type, class, and interface-sig decls
- tcg_env <- fixM (\ unf_env -> tcTyClDecls unf_env tycl_decls) ;
+ tcg_env <- tcTyClDecls tycl_decls ;
setGblEnv tcg_env $ do {
-- Typecheck the instance decls, and rules
pprTcGblEnv :: TcGblEnv -> SDoc
pprTcGblEnv (TcGblEnv { tcg_type_env = type_env,
tcg_insts = dfun_ids,
- tcg_rules = rules })
+ tcg_rules = rules,
+ tcg_imports = imports })
= vcat [ ppr_types dfun_ids type_env
, ppr_insts dfun_ids
, vcat (map ppr rules)
- , ppr_gen_tycons (typeEnvTyCons type_env)]
+ , ppr_gen_tycons (typeEnvTyCons type_env)
+ , ppr (moduleEnvElts (imp_dep_mods imports))
+ , ppr (imp_dep_pkgs imports)]
pprModGuts :: ModGuts -> SDoc
pprModGuts (ModGuts { mg_types = type_env,
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