)
import RnHsSyn ( RenamedHsModule(..), RenamedFixityDecl(..) )
import TcHsSyn ( TypecheckedHsBinds(..), TypecheckedHsExpr(..),
- TcIdOcc(..), zonkBinds, zonkInst, zonkId )
+ TcIdOcc(..), zonkBinds, zonkDictBinds )
import TcMonad hiding ( rnMtoTcM )
import Inst ( Inst, plusLIE )
import TcInstUtil ( buildInstanceEnvs, InstInfo )
import TcSimplify ( tcSimplifyTop )
import TcTyClsDecls ( tcTyAndClassDecls1 )
+import TcTyDecls ( mkDataBinds )
import Bag ( listToBag )
-import Class ( GenClass )
+import Class ( GenClass, classSelIds )
import ErrUtils ( Warning(..), Error(..) )
-import Id ( GenId, isDataCon, isMethodSelId, idType )
+import Id ( GenId, isDataCon, isMethodSelId, idType, IdEnv(..), nullIdEnv )
import Maybes ( catMaybes )
import Name ( isExported, isLocallyDefined )
-import PrelInfo ( unitTy, mkPrimIoTy )
import Pretty
import RnUtils ( RnEnv(..) )
-import TyCon ( TyCon )
+import TyCon ( isDataTyCon, TyCon )
import Type ( mkSynTy )
+import TysWiredIn ( unitTy, mkPrimIoTy )
+import TyVar ( TyVarEnv(..), nullTyVarEnv )
import Unify ( unifyTauTy )
import UniqFM ( lookupUFM_Directly, lookupWithDefaultUFM_Directly,
filterUFM, eltsUFM )
-- The knot for instance information. This isn't used at all
-- till we type-check value declarations
- fixTc ( \ ~(rec_inst_mapper, _, _, _, _, _) ->
+ fixTc ( \ ~(rec_inst_mapper, _, _, _, _) ->
-- Type-check the type and class decls
--trace "tcTyAndClassDecls:" $
tcTyAndClassDecls1 rec_inst_mapper ty_decls_bag cls_decls_bag
- `thenTc` \ (env, record_binds) ->
+ `thenTc` \ env ->
-- Typecheck the instance decls, includes deriving
tcSetEnv env (
buildInstanceEnvs inst_info `thenTc` \ inst_mapper ->
- returnTc (inst_mapper, env, record_binds, inst_info, deriv_binds, ddump_deriv)
+ returnTc (inst_mapper, env, inst_info, deriv_binds, ddump_deriv)
- ) `thenTc` \ (_, env, record_binds, inst_info, deriv_binds, ddump_deriv) ->
+ ) `thenTc` \ (_, env, inst_info, deriv_binds, ddump_deriv) ->
tcSetEnv env (
-- Default declarations
tcDefaults default_decls `thenTc` \ defaulting_tys ->
tcSetDefaultTys defaulting_tys ( -- for the iface sigs...
+ -- Create any necessary record selector Ids and their bindings
+ -- "Necessary" includes data and newtype declarations
+ let
+ tycons = getEnv_TyCons env
+ classes = getEnv_Classes env
+ in
+ mkDataBinds tycons `thenTc` \ (data_ids, data_binds) ->
+
+ -- Extend the global value environment with
+ -- a) constructors
+ -- b) record selectors
+ -- c) class op selectors
+ tcExtendGlobalValEnv data_ids $
+ tcExtendGlobalValEnv (concat (map classSelIds classes)) $
+
-- Interface type signatures
-- We tie a knot so that the Ids read out of interfaces are in scope
-- when we read their pragmas.
-- any type errors are found (ie there's an inconsistency)
-- we silently discard the pragma
tcInterfaceSigs sigs `thenTc` \ sig_ids ->
+ tcGetEnv `thenNF_Tc` \ env ->
- returnTc (env, inst_info, record_binds, deriv_binds, ddump_deriv, defaulting_tys, sig_ids)
+ returnTc (env, inst_info, data_binds, deriv_binds, ddump_deriv, defaulting_tys, sig_ids)
- )))) `thenTc` \ (env, inst_info, record_binds, deriv_binds, ddump_deriv, defaulting_tys, _) ->
+ )))) `thenTc` \ (env, inst_info, data_binds, deriv_binds, ddump_deriv, defaulting_tys, _) ->
tcSetEnv env ( -- to the end...
tcSetDefaultTys defaulting_tys ( -- ditto
-- type. (Usually, ambiguous type variables are resolved
-- during the generalisation step.)
tcSimplifyTop lie_alldecls `thenTc` \ const_insts ->
- let
- localids = getEnv_LocalIds final_env
- tycons = getEnv_TyCons final_env
- classes = getEnv_Classes final_env
-
- local_tycons = filter isLocallyDefined tycons
- local_classes = filter isLocallyDefined classes
- exported_ids = [v | v <- localids,
- isExported v && not (isDataCon v) && not (isMethodSelId v)]
- in
-- Backsubstitution. Monomorphic top-level decls may have
-- been instantiated by subsequent decls, and the final
-- simplification step may have instantiated some
-- ambiguous types. So, sadly, we need to back-substitute
-- over the whole bunch of bindings.
- zonkBinds record_binds `thenNF_Tc` \ record_binds' ->
- zonkBinds val_binds `thenNF_Tc` \ val_binds' ->
- zonkBinds inst_binds `thenNF_Tc` \ inst_binds' ->
- zonkBinds cls_binds `thenNF_Tc` \ cls_binds' ->
- mapNF_Tc zonkInst const_insts `thenNF_Tc` \ const_insts' ->
- mapNF_Tc (zonkId.TcId) exported_ids `thenNF_Tc` \ exported_ids' ->
+ --
+ -- More horrible still, we have to do it in a careful order, so that
+ -- all the TcIds are in scope when we come across them.
+ --
+ -- These bindings ought really to be bundled together in a huge
+ -- recursive group, but HsSyn doesn't have recursion among Binds, only
+ -- among MonoBinds. Sigh again.
+ zonkDictBinds nullTyVarEnv nullIdEnv const_insts `thenNF_Tc` \ (const_insts', ve1) ->
+ zonkBinds nullTyVarEnv ve1 val_binds `thenNF_Tc` \ (val_binds', ve2) ->
+
+ zonkBinds nullTyVarEnv ve2 data_binds `thenNF_Tc` \ (data_binds', _) ->
+ zonkBinds nullTyVarEnv ve2 inst_binds `thenNF_Tc` \ (inst_binds', _) ->
+ zonkBinds nullTyVarEnv ve2 cls_binds `thenNF_Tc` \ (cls_binds', _) ->
+
+ let
+ localids = getEnv_LocalIds final_env
+ tycons = getEnv_TyCons final_env
+ classes = getEnv_Classes final_env
+
+ local_tycons = [ tc | tc <- tycons, isLocallyDefined tc && isDataTyCon tc ]
+ local_classes = filter isLocallyDefined classes
+ exported_ids' = filter isExported (eltsUFM ve2)
+ in
-- FINISHED AT LAST
returnTc (
- (record_binds', cls_binds', inst_binds', val_binds', const_insts'),
+ (data_binds', cls_binds', inst_binds', val_binds', const_insts'),
-- the next collection is just for mkInterface
(exported_ids', tycons, classes, inst_info),
projects / ghc-hetmet.git / blobdiff