import TcDefaults ( tcDefaults )
import TcEnv ( TcEnv, InstInfo(iDFunId), tcExtendGlobalValEnv,
tcEnvTyCons, tcEnvClasses, isLocalThing,
- RecTcEnv, tcSetEnv, tcSetInstEnv, initTcEnv, getTcGEnv
+ tcSetEnv, tcSetInstEnv, initTcEnv, getTcGEnv
)
import TcRules ( tcRules )
import TcForeign ( tcForeignImports, tcForeignExports )
= do { showPass dflags "Typechecker";
; env <- initTcEnv hst (pcs_PTE pcs)
- ; (maybe_result, (warns,errs)) <- initTc dflags env tc_module
-
- ; let { maybe_tc_result :: Maybe TcResults ;
- maybe_tc_result = case maybe_result of
- Nothing -> Nothing
- Just (_,r) -> Just r }
+ ; (maybe_tc_result, (warns,errs)) <- initTc dflags env (tcModule pcs hst get_fixity this_mod decls)
; printErrorsAndWarnings unqual (errs,warns)
; printTcDump dflags maybe_tc_result
return Nothing
}
where
- tc_module :: TcM (RecTcEnv, TcResults)
- tc_module = fixTc (\ ~(unf_env ,_) -> tcModule pcs hst get_fixity this_mod decls unf_env)
-
fixity_env = mi_fixities mod_iface
get_fixity :: Name -> Maybe Fixity
-> (Name -> Maybe Fixity)
-> Module
-> [RenamedHsDecl]
- -> RecTcEnv -- The knot-tied environment
- -> TcM (TcEnv, TcResults)
+ -> TcM TcResults
- -- (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
-
-tcModule pcs hst get_fixity this_mod decls unf_env
+tcModule pcs hst get_fixity this_mod decls
= -- Type-check the type and class decls
- tcTyAndClassDecls unf_env decls `thenTc` \ env ->
- tcSetEnv env $
- let
- classes = tcEnvClasses env
- tycons = tcEnvTyCons env -- INCLUDES tycons derived from classes
- in
-
- -- Typecheck the instance decls, includes deriving
- tcInstDecls1 (pcs_insts pcs) (pcs_PRS pcs)
- hst unf_env get_fixity this_mod
- tycons decls `thenTc` \ (new_pcs_insts, inst_env, local_inst_info, deriv_binds) ->
- tcSetInstEnv inst_env $
-
- -- Default declarations
- tcDefaults decls `thenTc` \ defaulting_tys ->
- tcSetDefaultTys defaulting_tys $
-
- -- 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
- -- We must do this before mkImplicitDataBinds (which comes next), since
- -- the latter looks up unpackCStringId, for example, which is usually
- -- imported
- tcInterfaceSigs unf_env decls `thenTc` \ sig_ids ->
- tcExtendGlobalValEnv sig_ids $
-
- -- Create any necessary record selector Ids and their bindings
- -- "Necessary" includes data and newtype declarations
- -- We don't create bindings for dictionary constructors;
- -- they are always fully applied, and the bindings are just there
- -- to support partial applications
- mkImplicitDataBinds this_mod tycons `thenTc` \ (data_ids, imp_data_binds) ->
- mkImplicitClassBinds this_mod classes `thenNF_Tc` \ (cls_ids, imp_cls_binds) ->
-
- -- Extend the global value environment with
- -- (a) constructors
- -- (b) record selectors
- -- (c) class op selectors
- -- (d) default-method ids... where? I can't see where these are
- -- put into the envt, and I'm worried that the zonking phase
- -- will find they aren't there and complain.
- tcExtendGlobalValEnv data_ids $
- tcExtendGlobalValEnv cls_ids $
- tcGetEnv `thenTc` \ unf_env ->
+ fixTc (\ ~(unf_env, _, _, _, _) ->
+ -- (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 decls `thenTc` \ env ->
+ tcSetEnv env $
+ let
+ classes = tcEnvClasses env
+ tycons = tcEnvTyCons env -- INCLUDES tycons derived from classes
+ in
+
+ -- 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
+ tycons 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
+ -- We must do this before mkImplicitDataBinds (which comes next), since
+ -- the latter looks up unpackCStringId, for example, which is usually
+ -- imported
+-- traceTc (text "Tc3") `thenNF_Tc_`
+ tcInterfaceSigs unf_env decls `thenTc` \ sig_ids ->
+ tcExtendGlobalValEnv sig_ids $
+
+ -- Create any necessary record selector Ids and their bindings
+ -- "Necessary" includes data and newtype declarations
+ -- We don't create bindings for dictionary constructors;
+ -- they are always fully applied, and the bindings are just there
+ -- to support partial applications
+ mkImplicitDataBinds this_mod tycons `thenTc` \ (data_ids, imp_data_binds) ->
+ mkImplicitClassBinds this_mod classes `thenNF_Tc` \ (cls_ids, imp_cls_binds) ->
+
+ -- Extend the global value environment with
+ -- (a) constructors
+ -- (b) record selectors
+ -- (c) class op selectors
+ -- (d) default-method ids... where? I can't see where these are
+ -- put into the envt, and I'm worried that the zonking phase
+ -- will find they aren't there and complain.
+ tcExtendGlobalValEnv data_ids $
+ tcExtendGlobalValEnv cls_ids $
+ tcGetEnv `thenTc` \ unf_env ->
+ returnTc (unf_env, new_pcs_insts, local_inst_info, deriv_binds,
+ imp_data_binds `AndMonoBinds` imp_cls_binds)
+ ) `thenTc` \ (env, new_pcs_insts, local_inst_info, deriv_binds, data_cls_binds) ->
+ tcSetEnv env $
+
-- Foreign import declarations next
+-- traceTc (text "Tc4") `thenNF_Tc_`
tcForeignImports decls `thenTc` \ (fo_ids, foi_decls) ->
tcExtendGlobalValEnv fo_ids $
- -- Value declarations next.
- -- We also typecheck any extra binds that came out of the "deriving" process
+ -- Default declarations
+ 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 (get_binds decls `ThenBinds` deriv_binds) `thenTc` \ ((val_binds, env), lie_valdecls) ->
tcSetEnv env $
- -- Foreign export declarations next
+ -- 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.
+-- traceTc (text "Tc7") `thenNF_Tc_`
tcInstDecls2 local_inst_info `thenNF_Tc` \ (lie_instdecls, inst_binds) ->
+-- traceTc (text "Tc8") `thenNF_Tc_`
tcClassDecls2 this_mod decls `thenNF_Tc` \ (lie_clasdecls, cls_dm_binds) ->
tcRules (pcs_rules pcs) this_mod decls `thenNF_Tc` \ (new_pcs_rules, lie_rules, local_rules) ->
-- Backsubstitution. This must be done last.
-- Even tcSimplifyTop may do some unification.
let
- all_binds = imp_data_binds `AndMonoBinds`
- imp_cls_binds `AndMonoBinds`
+ all_binds = data_cls_binds `AndMonoBinds`
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
pcs_rules = new_pcs_rules
}
in
- returnTc (unf_env,
- TcResults { tc_pcs = final_pcs,
+-- traceTc (text "Tc10") `thenNF_Tc_`
+ returnTc (TcResults { tc_pcs = final_pcs,
tc_env = local_type_env,
tc_binds = all_binds',
tc_insts = map iDFunId local_inst_info,
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