isIfaceRuleDecl, nullBinds, andMonoBindList
)
import HsTypes ( toHsType )
-import PrelNames ( mAIN_Name, mainName, ioTyConName, printName )
+import PrelNames ( SyntaxMap, mAIN_Name, mainName, ioTyConName, printName )
import RnHsSyn ( RenamedHsBinds, RenamedHsDecl, RenamedHsExpr )
import TcHsSyn ( TypecheckedMonoBinds, TypecheckedHsExpr,
TypecheckedForeignDecl, TypecheckedRuleDecl,
import TcClassDcl ( tcClassDecls2 )
import TcDefaults ( tcDefaults, defaultDefaultTys )
import TcExpr ( tcMonoExpr )
-import TcEnv ( TcEnv, InstInfo, tcExtendGlobalValEnv, tcLookup_maybe,
+import TcEnv ( TcEnv, RecTcEnv, InstInfo, tcExtendGlobalValEnv, tcLookup_maybe,
isLocalThing, tcSetEnv, tcSetInstEnv, initTcEnv, getTcGEnv,
TcTyThing(..), tcLookupTyCon
)
-> HomeSymbolTable
-> ModIface -- Iface for this module
-> PrintUnqualified -- For error printing
- -> [RenamedHsDecl]
+ -> (SyntaxMap, [RenamedHsDecl])
-> Bool -- True <=> check for Main.main if Module==Main
-> IO (Maybe (PersistentCompilerState, TcResults))
-- The new PCS is Augmented with imported information,
-- (but not stuff from this module)
-typecheckModule dflags pcs hst mod_iface unqual decls check_main
- = do { maybe_tc_result <- typecheck dflags pcs hst unqual $
+typecheckModule dflags pcs hst mod_iface unqual (syn_map, decls) check_main
+ = do { maybe_tc_result <- typecheck dflags syn_map pcs hst unqual $
tcModule pcs hst get_fixity this_mod decls check_main
; printTcDump dflags maybe_tc_result
; return maybe_tc_result }
-> HomeSymbolTable
-> PrintUnqualified -- For error printing
-> Module
- -> (RenamedHsExpr, -- The expression itself
+ -> (SyntaxMap,
+ RenamedHsExpr, -- The expression itself
[RenamedHsDecl]) -- Plus extra decls it sucked in from interface files
-> IO (Maybe (PersistentCompilerState, TypecheckedHsExpr, TcType))
-typecheckExpr dflags wrap_io pcs hst unqual this_mod (expr, decls)
- = typecheck dflags pcs hst unqual $
+typecheckExpr dflags wrap_io pcs hst unqual this_mod (syn_map, expr, decls)
+ = typecheck dflags syn_map pcs hst unqual $
-- use the default default settings, i.e. [Integer, Double]
tcSetDefaultTys defaultDefaultTys $
- tcImports pcs hst get_fixity this_mod decls `thenTc` \ (env, new_pcs, local_inst_info, deriv_binds, local_rules) ->
+
+ -- Typecheck the extra declarations
+ fixTc (\ ~(unf_env, _, _, _, _) ->
+ tcImports unf_env pcs hst get_fixity this_mod decls
+ ) `thenTc` \ (env, new_pcs, local_inst_info, deriv_binds, local_rules) ->
ASSERT( null local_inst_info && nullBinds deriv_binds && null local_rules )
+ -- Now typecheck the expression
tcSetEnv env $
tc_expr expr `thenTc` \ (expr', expr_ty) ->
zonkExpr expr' `thenNF_Tc` \ zonked_expr ->
---------------
typecheck :: DynFlags
+ -> SyntaxMap
-> PersistentCompilerState
-> HomeSymbolTable
-> PrintUnqualified -- For error printing
-> TcM r
-> IO (Maybe r)
-typecheck dflags pcs hst unqual thing_inside
+typecheck dflags syn_map pcs hst unqual thing_inside
= do { showPass dflags "Typechecker";
- ; env <- initTcEnv hst (pcs_PTE pcs)
+ ; env <- initTcEnv syn_map hst (pcs_PTE pcs)
; (maybe_tc_result, errs) <- initTc dflags env thing_inside
-> TcM (PersistentCompilerState, TcResults)
tcModule pcs hst get_fixity this_mod decls check_main
- = -- Type-check the type and class decls, and all imported decls
- -- tcImports recovers internally, but if anything gave rise to
- -- an error we'd better stop now, to avoid a cascade
- checkNoErrsTc (
- tcImports pcs hst get_fixity this_mod decls
- ) `thenTc` \ (env, new_pcs, local_inst_info, deriv_binds, local_rules) ->
+ = fixTc (\ ~(unf_env, _, _) ->
+ -- Loop back the final environment, including the fully zonkec
+ -- 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
- tcSetEnv env $
+ -- Type-check the type and class decls, and all imported decls
+ tcImports unf_env pcs hst get_fixity this_mod decls
+ `thenTc` \ (env, new_pcs, local_insts, deriv_binds, local_rules) ->
+
+ tcSetEnv env $
-- Foreign import declarations next
--- traceTc (text "Tc4") `thenNF_Tc_`
- tcForeignImports decls `thenTc` \ (fo_ids, foi_decls) ->
- tcExtendGlobalValEnv fo_ids $
+ traceTc (text "Tc4") `thenNF_Tc_`
+ tcForeignImports decls `thenTc` \ (fo_ids, foi_decls) ->
+ tcExtendGlobalValEnv fo_ids $
-- Default declarations
- tcDefaults decls `thenTc` \ defaulting_tys ->
- tcSetDefaultTys defaulting_tys $
+ tcDefaults decls `thenTc` \ defaulting_tys ->
+ tcSetDefaultTys defaulting_tys $
-- Value declarations next.
-- We also typecheck any extra binds that came out of the "deriving" process
--- traceTc (text "Tc5") `thenNF_Tc_`
- tcTopBinds (val_binds `ThenBinds` deriv_binds) `thenTc` \ ((val_binds, env), lie_valdecls) ->
- tcSetEnv env $
-
- -- Foreign export declarations next
--- traceTc (text "Tc6") `thenNF_Tc_`
- tcForeignExports decls `thenTc` \ (lie_fodecls, foe_binds, foe_decls) ->
-
- -- Second pass over class and instance declarations,
- -- to compile the bindings themselves.
- tcInstDecls2 local_inst_info `thenNF_Tc` \ (lie_instdecls, inst_binds) ->
- tcClassDecls2 this_mod tycl_decls `thenNF_Tc` \ (lie_clasdecls, cls_dm_binds) ->
- tcSourceRules source_rules `thenNF_Tc` \ (lie_rules, more_local_rules) ->
-
- -- Deal with constant or ambiguous InstIds. How could
- -- there be ambiguous ones? They can only arise if a
- -- top-level decl falls under the monomorphism
- -- restriction, and no subsequent decl instantiates its
- -- type. (Usually, ambiguous type variables are resolved
- -- during the generalisation step.)
- let
- lie_alldecls = lie_valdecls `plusLIE`
- lie_instdecls `plusLIE`
- lie_clasdecls `plusLIE`
- lie_fodecls `plusLIE`
- lie_rules
- in
- tcSimplifyTop lie_alldecls `thenTc` \ const_inst_binds ->
-
- -- CHECK THAT main IS DEFINED WITH RIGHT TYPE, IF REQUIRED
- (if check_main
- then tcCheckMain this_mod
- else returnTc ()) `thenTc_`
-
- -- Backsubstitution. This must be done last.
- -- Even tcSimplifyTop may do some unification.
- let
- all_binds = val_binds `AndMonoBinds`
- inst_binds `AndMonoBinds`
- cls_dm_binds `AndMonoBinds`
- const_inst_binds `AndMonoBinds`
- foe_binds
- in
--- traceTc (text "Tc9") `thenNF_Tc_`
- zonkTopBinds all_binds `thenNF_Tc` \ (all_binds', final_env) ->
- tcSetEnv final_env $
- -- zonkTopBinds puts all the top-level Ids into the tcGEnv
- zonkForeignExports foe_decls `thenNF_Tc` \ foe_decls' ->
- zonkRules more_local_rules `thenNF_Tc` \ more_local_rules' ->
-
-
- let local_things = filter (isLocalThing this_mod) (nameEnvElts (getTcGEnv final_env))
-
- -- Create any necessary "implicit" bindings (data constructors etc)
- -- Should we create bindings for dictionary constructors?
- -- They are always fully applied, and the bindings are just there
- -- to support partial applications. But it's easier to let them through.
- implicit_binds = andMonoBindList [ CoreMonoBind id (unfoldingTemplate unf)
- | id <- implicitTyThingIds local_things
- , let unf = idUnfolding id
- , hasUnfolding unf
- ]
-
- local_type_env :: TypeEnv
- local_type_env = mkTypeEnv local_things
-
- all_local_rules = local_rules ++ more_local_rules'
- in
--- traceTc (text "Tc10") `thenNF_Tc_`
- returnTc (new_pcs,
- TcResults { tc_env = local_type_env,
- tc_binds = implicit_binds `AndMonoBinds` all_binds',
- tc_fords = foi_decls ++ foe_decls',
- tc_rules = all_local_rules
- }
- )
+ traceTc (text "Tc5") `thenNF_Tc_`
+ tcTopBinds (val_binds `ThenBinds` deriv_binds) `thenTc` \ ((val_binds, env), lie_valdecls) ->
+
+ -- Second pass over class and instance declarations,
+ -- plus rules and foreign exports, to generate bindings
+ tcSetEnv env $
+ tcInstDecls2 local_insts `thenNF_Tc` \ (lie_instdecls, inst_binds) ->
+ tcClassDecls2 this_mod tycl_decls `thenNF_Tc` \ (lie_clasdecls, cls_dm_binds) ->
+ tcForeignExports decls `thenTc` \ (lie_fodecls, foe_binds, foe_decls) ->
+ tcSourceRules source_rules `thenNF_Tc` \ (lie_rules, more_local_rules) ->
+
+ -- Deal with constant or ambiguous InstIds. How could
+ -- there be ambiguous ones? They can only arise if a
+ -- top-level decl falls under the monomorphism
+ -- restriction, and no subsequent decl instantiates its
+ -- type. (Usually, ambiguous type variables are resolved
+ -- during the generalisation step.)
+ let
+ lie_alldecls = lie_valdecls `plusLIE`
+ lie_instdecls `plusLIE`
+ lie_clasdecls `plusLIE`
+ lie_fodecls `plusLIE`
+ lie_rules
+ in
+ traceTc (text "Tc6") `thenNF_Tc_`
+ tcSimplifyTop lie_alldecls `thenTc` \ const_inst_binds ->
+
+ -- CHECK THAT main IS DEFINED WITH RIGHT TYPE, IF REQUIRED
+ (if check_main
+ then tcCheckMain this_mod
+ else returnTc ()) `thenTc_`
+
+ -- Backsubstitution. This must be done last.
+ -- Even tcSimplifyTop may do some unification.
+ let
+ all_binds = val_binds `AndMonoBinds`
+ inst_binds `AndMonoBinds`
+ cls_dm_binds `AndMonoBinds`
+ const_inst_binds `AndMonoBinds`
+ foe_binds
+ in
+ traceTc (text "Tc7") `thenNF_Tc_`
+ zonkTopBinds all_binds `thenNF_Tc` \ (all_binds', final_env) ->
+ tcSetEnv final_env $
+ -- zonkTopBinds puts all the top-level Ids into the tcGEnv
+ traceTc (text "Tc8") `thenNF_Tc_`
+ zonkForeignExports foe_decls `thenNF_Tc` \ foe_decls' ->
+ traceTc (text "Tc9") `thenNF_Tc_`
+ zonkRules more_local_rules `thenNF_Tc` \ more_local_rules' ->
+
+
+ let local_things = filter (isLocalThing this_mod) (nameEnvElts (getTcGEnv final_env))
+
+ -- Create any necessary "implicit" bindings (data constructors etc)
+ -- Should we create bindings for dictionary constructors?
+ -- They are always fully applied, and the bindings are just there
+ -- to support partial applications. But it's easier to let them through.
+ implicit_binds = andMonoBindList [ CoreMonoBind id (unfoldingTemplate unf)
+ | id <- implicitTyThingIds local_things
+ , let unf = idUnfolding id
+ , hasUnfolding unf
+ ]
+
+ local_type_env :: TypeEnv
+ local_type_env = mkTypeEnv local_things
+
+ all_local_rules = local_rules ++ more_local_rules'
+ in
+ traceTc (text "Tc10") `thenNF_Tc_`
+ returnTc (final_env,
+ new_pcs,
+ TcResults { tc_env = local_type_env,
+ tc_binds = implicit_binds `AndMonoBinds` all_binds',
+ tc_fords = foi_decls ++ foe_decls',
+ tc_rules = all_local_rules
+ }
+ )
+ ) `thenTc` \ (_, pcs, tc_result) ->
+ returnTc (pcs, tc_result)
where
tycl_decls = [d | TyClD d <- decls]
val_binds = foldr ThenBinds EmptyBinds [binds | ValD binds <- decls]
\begin{code}
-tcImports :: PersistentCompilerState
+tcImports :: RecTcEnv
+ -> PersistentCompilerState
-> HomeSymbolTable
-> (Name -> Maybe Fixity)
-> Module
-> [RenamedHsDecl]
- -> TcM (TcEnv, PersistentCompilerState,
- [InstInfo], RenamedHsBinds, [TypecheckedRuleDecl])
+ -> TcM (TcEnv, PersistentCompilerState, [InstInfo],
+ RenamedHsBinds, [TypecheckedRuleDecl])
-- tcImports is a slight mis-nomer.
-- It deals with everythign that could be an import:
-- rule decls
-- These can occur in source code too, of course
-tcImports pcs hst get_fixity this_mod decls
- = fixTc (\ ~(unf_env, _, _, _, _) ->
- -- (unf_env :: RecTcEnv) is used for type-checking interface pragmas
+tcImports unf_env pcs hst get_fixity this_mod decls
+ -- (unf_env :: RecTcEnv) is used for type-checking interface pragmas
-- which is done lazily [ie failure just drops the pragma
-- without having any global-failure effect].
--
-- unf_env is also used to get the pragama info
-- for imported dfuns and default methods
-
--- traceTc (text "Tc1") `thenNF_Tc_`
- tcTyAndClassDecls unf_env tycl_decls `thenTc` \ env ->
- tcSetEnv env $
-
- -- Typecheck the instance decls, includes deriving
--- traceTc (text "Tc2") `thenNF_Tc_`
- tcInstDecls1 (pcs_insts pcs) (pcs_PRS pcs)
- hst unf_env get_fixity this_mod
- decls `thenTc` \ (new_pcs_insts, inst_env, local_inst_info, deriv_binds) ->
- tcSetInstEnv inst_env $
-
- -- 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 "Tc3") `thenNF_Tc_`
- tcInterfaceSigs unf_env tycl_decls `thenTc` \ sig_ids ->
- tcExtendGlobalValEnv sig_ids $
-
-
- tcIfaceRules (pcs_rules pcs) this_mod iface_rules `thenNF_Tc` \ (new_pcs_rules, local_rules) ->
- -- When relinking this module from its interface-file decls
- -- we'll have IfaceRules that are in fact local to this module
- -- That's the reason we we get any local_rules out here
- tcGetEnv `thenTc` \ unf_env ->
- let
- all_things = nameEnvElts (getTcGEnv unf_env)
-
- -- sometimes we're compiling in the context of a package module
- -- (on the GHCi command line, for example). In this case, we
- -- want to treat everything we pulled in as an imported thing.
- imported_things
- | isHomeModule this_mod
- = filter (not . isLocalThing this_mod) all_things
- | otherwise
- = all_things
-
- new_pte :: PackageTypeEnv
- new_pte = extendTypeEnvList (pcs_PTE pcs) imported_things
-
- new_pcs :: PersistentCompilerState
- new_pcs = pcs { pcs_PTE = new_pte,
- pcs_insts = new_pcs_insts,
- pcs_rules = new_pcs_rules
- }
- in
- returnTc (unf_env, new_pcs, local_inst_info, deriv_binds, local_rules)
- )
+ = checkNoErrsTc $
+ -- tcImports recovers internally, but if anything gave rise to
+ -- an error we'd better stop now, to avoid a cascade
+
+ traceTc (text "Tc1") `thenNF_Tc_`
+ tcTyAndClassDecls unf_env tycl_decls `thenTc` \ env ->
+ tcSetEnv env $
+
+ -- Typecheck the instance decls, includes deriving
+ traceTc (text "Tc2") `thenNF_Tc_`
+ tcInstDecls1 (pcs_insts pcs) (pcs_PRS pcs)
+ hst unf_env get_fixity this_mod
+ decls `thenTc` \ (new_pcs_insts, inst_env, local_insts, deriv_binds) ->
+ tcSetInstEnv inst_env $
+
+ -- 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 "Tc3") `thenNF_Tc_`
+ tcInterfaceSigs unf_env tycl_decls `thenTc` \ sig_ids ->
+ tcExtendGlobalValEnv sig_ids $
+
+
+ tcIfaceRules (pcs_rules pcs) this_mod iface_rules `thenNF_Tc` \ (new_pcs_rules, local_rules) ->
+ -- When relinking this module from its interface-file decls
+ -- we'll have IfaceRules that are in fact local to this module
+ -- That's the reason we we get any local_rules out here
+
+ tcGetEnv `thenTc` \ unf_env ->
+ let
+ all_things = nameEnvElts (getTcGEnv unf_env)
+
+ -- sometimes we're compiling in the context of a package module
+ -- (on the GHCi command line, for example). In this case, we
+ -- want to treat everything we pulled in as an imported thing.
+ imported_things
+ | isHomeModule this_mod
+ = filter (not . isLocalThing this_mod) all_things
+ | otherwise
+ = all_things
+
+ new_pte :: PackageTypeEnv
+ new_pte = extendTypeEnvList (pcs_PTE pcs) imported_things
+
+ new_pcs :: PersistentCompilerState
+ new_pcs = pcs { pcs_PTE = new_pte,
+ pcs_insts = new_pcs_insts,
+ pcs_rules = new_pcs_rules
+ }
+ in
+ returnTc (unf_env, new_pcs, local_insts, deriv_binds, local_rules)
where
tycl_decls = [d | TyClD d <- decls]
iface_rules = [d | RuleD d <- decls, isIfaceRuleDecl d]
projects / ghc-hetmet.git / blobdiff