#include "HsVersions.h"
-import CmdLineOpts ( DynFlag(..), DynFlags, opt_PprStyle_Debug )
+import CmdLineOpts ( DynFlag(..), DynFlags, dopt )
import HsSyn ( HsBinds(..), MonoBinds(..), HsDecl(..), HsExpr(..),
- Stmt(..), InPat(..), HsMatchContext(..),
- isIfaceRuleDecl, nullBinds, andMonoBindList, mkSimpleMatch
+ Stmt(..), InPat(..), HsMatchContext(..), HsDoContext(..), RuleDecl(..),
+ isIfaceRuleDecl, nullBinds, andMonoBindList, mkSimpleMatch, placeHolderType
)
-import HsTypes ( toHsType )
-import PrelNames ( SyntaxMap, mAIN_Name, mainName, ioTyConName, printName,
+import PrelNames ( mAIN_Name, mainName, ioTyConName, printName,
returnIOName, bindIOName, failIOName,
itName
)
zonkExpr, zonkIdBndr
)
-
+import MkIface ( pprModDetails )
import TcExpr ( tcMonoExpr )
import TcMonad
-import TcType ( newTyVarTy, zonkTcType, tcInstType )
+import TcMType ( unifyTauTy, newTyVarTy, zonkTcType, tcInstType )
+import TcType ( Type, liftedTypeKind, openTypeKind,
+ tyVarsOfType, tidyType, tcFunResultTy,
+ mkForAllTys, mkFunTys, mkTyConApp, tcSplitForAllTys
+ )
import TcMatches ( tcStmtsAndThen )
-import TcUnify ( unifyTauTy )
import Inst ( emptyLIE, plusLIE )
import TcBinds ( tcTopBinds )
import TcClassDcl ( tcClassDecls2 )
import TcDefaults ( tcDefaults, defaultDefaultTys )
-import TcEnv ( TcEnv, RecTcEnv, InstInfo, tcExtendGlobalValEnv, tcLookup_maybe,
+import TcEnv ( TcEnv, RecTcEnv, InstInfo(iDFunId), tcExtendGlobalValEnv, tcLookup_maybe,
isLocalThing, tcSetEnv, tcSetInstEnv, initTcEnv, getTcGEnv,
tcExtendGlobalTypeEnv, tcLookupGlobalId, tcLookupTyCon,
- TcTyThing(..), tcLookupId
+ TcTyThing(..), tcLookupId
)
import TcRules ( tcIfaceRules, tcSourceRules )
import TcForeign ( tcForeignImports, tcForeignExports )
import TcInstDcls ( tcInstDecls1, tcInstDecls2 )
import TcSimplify ( tcSimplifyTop, tcSimplifyInfer )
import TcTyClsDecls ( tcTyAndClassDecls )
-
import CoreUnfold ( unfoldingTemplate, hasUnfolding )
import TysWiredIn ( mkListTy, unitTy )
-import Type
-import ErrUtils ( printErrorsAndWarnings, errorsFound, dumpIfSet_dyn, showPass )
-import Id ( Id, idType, idName, isLocalId, idUnfolding )
+import ErrUtils ( printErrorsAndWarnings, errorsFound,
+ dumpIfSet_dyn, dumpIfSet_dyn_or, showPass )
+import Id ( Id, idType, idUnfolding )
import Module ( Module, moduleName )
-import Name ( Name, toRdrName, isGlobalName )
-import Name ( nameEnvElts, lookupNameEnv )
+import Name ( Name )
+import NameEnv ( nameEnvElts, lookupNameEnv )
import TyCon ( tyConGenInfo )
-import Util
import BasicTypes ( EP(..), Fixity, RecFlag(..) )
import SrcLoc ( noSrcLoc )
import Outputable
+import IO ( stdout )
import HscTypes ( PersistentCompilerState(..), HomeSymbolTable,
PackageTypeEnv, ModIface(..),
+ ModDetails(..), DFunId,
TypeEnv, extendTypeEnvList,
TyThing(..), implicitTyThingIds,
mkTypeEnv
)
-import Rules ( ruleBaseIds )
-import VarSet
\end{code}
-> PrintUnqualified -- For error printing
-> Module -- Is this really needed
-> [Name] -- Names bound by the Stmt (empty for expressions)
- -> (SyntaxMap,
- RenamedStmt, -- The stmt itself
+ -> (RenamedStmt, -- The stmt itself
[RenamedHsDecl]) -- Plus extra decls it sucked in from interface files
-> IO (Maybe (PersistentCompilerState,
TypecheckedHsExpr,
-- The returned [Id] is the same as the input except for
-- ExprStmt, in which case the returned [Name] is [itName]
-typecheckStmt dflags pcs hst ic_type_env unqual this_mod names (syn_map, stmt, iface_decls)
- = typecheck dflags syn_map pcs hst unqual $
+typecheckStmt dflags pcs hst ic_type_env unqual this_mod names (stmt, iface_decls)
+ = typecheck dflags pcs hst unqual $
-- use the default default settings, i.e. [Integer, Double]
tcSetDefaultTys defaultDefaultTys $
\begin{code}
tcUserStmt :: [Name] -> RenamedStmt -> TcM (TypecheckedHsExpr, [Id])
-tcUserStmt names (ExprStmt expr loc)
+tcUserStmt names (ExprStmt expr _ loc)
= ASSERT( null names )
+ tcGetUnique `thenNF_Tc` \ uniq ->
+ let
+ fresh_it = itName uniq
+ the_bind = FunMonoBind fresh_it False
+ [ mkSimpleMatch [] expr placeHolderType loc ] loc
+ in
tryTc_ (traceTc (text "tcs 1b") `thenNF_Tc_`
- tc_stmts [itName] [LetStmt (MonoBind the_bind [] NonRecursive),
- ExprStmt (HsApp (HsVar printName) (HsVar itName)) loc])
+ tc_stmts [fresh_it] [
+ LetStmt (MonoBind the_bind [] NonRecursive),
+ ExprStmt (HsApp (HsVar printName) (HsVar fresh_it)) placeHolderType loc])
( traceTc (text "tcs 1a") `thenNF_Tc_`
- tc_stmts [itName] [BindStmt (VarPatIn itName) expr loc])
- where
- the_bind = FunMonoBind itName False [mkSimpleMatch [] expr Nothing loc] loc
+ tc_stmts [fresh_it] [BindStmt (VarPatIn fresh_it) expr loc])
tcUserStmt names stmt
= tc_stmts names [stmt]
-- mk_return builds the expression
-- returnIO @ [()] [coerce () x, .., coerce () z]
mk_return ids = HsApp (TyApp (HsVar return_id) [mkListTy unitTy])
- (ExplicitListOut unitTy (map mk_item ids))
+ (ExplicitList unitTy (map mk_item ids))
mk_item id = HsApp (TyApp (HsVar unsafeCoerceId) [idType id, unitTy])
(HsVar id)
in
traceTc (text "tcs 2") `thenNF_Tc_`
- tcStmtsAndThen combine DoExpr io_ty stmts (
+ tcStmtsAndThen combine (DoCtxt DoExpr) io_ty stmts (
-- Look up the names right in the middle,
-- where they will all be in scope
mapNF_Tc tcLookupId names `thenNF_Tc` \ ids ->
- returnTc ((ids, [ExprStmt (mk_return ids) noSrcLoc]), emptyLIE)
+ returnTc ((ids, [ResultStmt (mk_return ids) noSrcLoc]), emptyLIE)
) `thenTc` \ ((ids, tc_stmts), lie) ->
-- Simplify the context right here, so that we fail
-> TypeEnv -- The interactive context's type envt
-> PrintUnqualified -- For error printing
-> Module
- -> (SyntaxMap,
- RenamedHsExpr, -- The expression itself
+ -> (RenamedHsExpr, -- The expression itself
[RenamedHsDecl]) -- Plus extra decls it sucked in from interface files
-> IO (Maybe (PersistentCompilerState,
TypecheckedHsExpr,
[Id], -- always empty (matches typecheckStmt)
Type))
-typecheckExpr dflags pcs hst ic_type_env unqual this_mod (syn_map, expr, decls)
- = typecheck dflags syn_map pcs hst unqual $
+typecheckExpr dflags pcs hst ic_type_env unqual this_mod (expr, decls)
+ = typecheck dflags pcs hst unqual $
-- use the default default settings, i.e. [Integer, Double]
tcSetDefaultTys defaultDefaultTys $
newTyVarTy openTypeKind `thenTc` \ ty ->
tcMonoExpr expr ty `thenTc` \ (e', lie) ->
- tcSimplifyInfer smpl_doc (varSetElems (tyVarsOfType ty)) lie
- `thenTc` \ (qtvs, lie_free, dict_binds, dict_ids) ->
+ tcSimplifyInfer smpl_doc (tyVarsOfType ty) lie
+ `thenTc` \ (qtvs, lie_free, dict_binds, dict_ids) ->
tcSimplifyTop lie_free `thenTc` \ const_binds ->
let all_expr = mkHsLet const_binds $
-> HomeSymbolTable
-> ModIface -- Iface for this module
-> PrintUnqualified -- For error printing
- -> (SyntaxMap, [RenamedHsDecl])
+ -> [RenamedHsDecl]
-> IO (Maybe (PersistentCompilerState, TcResults))
-- The new PCS is Augmented with imported information,
-- (but not stuff from this module)
= TcResults {
-- All these fields have info *just for this module*
tc_env :: TypeEnv, -- The top level TypeEnv
+ tc_insts :: [DFunId], -- Instances
+ tc_rules :: [TypecheckedRuleDecl], -- Transformation rules
tc_binds :: TypecheckedMonoBinds, -- Bindings
- tc_fords :: [TypecheckedForeignDecl], -- Foreign import & exports.
- tc_rules :: [TypecheckedRuleDecl] -- Transformation rules
+ tc_fords :: [TypecheckedForeignDecl] -- Foreign import & exports.
}
-typecheckModule dflags pcs hst mod_iface unqual (syn_map, decls)
- = do { maybe_tc_result <- typecheck dflags syn_map pcs hst unqual $
+typecheckModule dflags pcs hst mod_iface unqual decls
+ = do { maybe_tc_result <- typecheck dflags pcs hst unqual $
tcModule pcs hst get_fixity this_mod decls
- ; printTcDump dflags maybe_tc_result
+ ; printTcDump dflags unqual maybe_tc_result
; return maybe_tc_result }
where
this_mod = mi_module mod_iface
tcModule pcs hst get_fixity this_mod decls
= fixTc (\ ~(unf_env, _, _) ->
- -- Loop back the final environment, including the fully zonkec
+ -- 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
tcForeignExports decls `thenTc` \ (lie_fodecls, foe_binds, foe_decls) ->
tcSourceRules source_rules `thenNF_Tc` \ (lie_rules, more_local_rules) ->
+ -- CHECK THAT main IS DEFINED WITH RIGHT TYPE, IF REQUIRED
+ traceTc (text "Tc6") `thenNF_Tc_`
+ tcCheckMain this_mod `thenTc_`
+
-- 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.)
+ --
+ -- Note that we must do this *after* tcCheckMain, because of the
+ -- following bizarre case:
+ -- main = return ()
+ -- Here, we infer main :: forall a. m a, where m is a free
+ -- type variable. tcCheckMain will unify it with IO, and that
+ -- must happen before tcSimplifyTop, since the latter will report
+ -- m as ambiguous
let
lie_alldecls = lie_valdecls `plusLIE`
lie_instdecls `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
- tcCheckMain this_mod `thenTc_`
+ tcSimplifyTop lie_alldecls `thenTc` \ const_inst_binds ->
+ traceTc (text "endsimpltop") `thenTc_`
-- Backsubstitution. This must be done last.
-- Even tcSimplifyTop may do some unification.
returnTc (final_env,
new_pcs,
TcResults { tc_env = local_type_env,
+ tc_insts = map iDFunId local_insts,
tc_binds = implicit_binds `AndMonoBinds` all_binds',
tc_fords = foi_decls ++ foe_decls',
tc_rules = all_local_rules
-> PersistentCompilerState
-> HomeSymbolTable
-> ModIface -- Iface for this module (just module & fixities)
- -> (SyntaxMap, [RenamedHsDecl])
- -> IO (Maybe (PersistentCompilerState, TypeEnv, [TypecheckedRuleDecl]))
+ -> [RenamedHsDecl]
+ -> IO (Maybe (PersistentCompilerState, ModDetails))
-- The new PCS is Augmented with imported information,
-- (but not stuff from this module).
- -- The TcResults returned contains only the environment
- -- and rules.
-
-typecheckIface dflags pcs hst mod_iface (syn_map, decls)
- = do { maybe_tc_stuff <- typecheck dflags syn_map pcs hst alwaysQualify $
+typecheckIface dflags pcs hst mod_iface decls
+ = do { maybe_tc_stuff <- typecheck dflags pcs hst alwaysQualify $
tcIfaceImports pcs hst get_fixity this_mod decls
; printIfaceDump dflags maybe_tc_stuff
; return maybe_tc_stuff }
deriv_binds, local_rules) ->
ASSERT(nullBinds deriv_binds)
let
- local_things = filter (isLocalThing this_mod)
- (nameEnvElts (getTcGEnv env))
- local_type_env :: TypeEnv
- local_type_env = mkTypeEnv local_things
- in
-
- -- throw away local_inst_info
- returnTc (new_pcs, local_type_env, local_rules)
+ local_things = filter (isLocalThing this_mod) (nameEnvElts (getTcGEnv env))
+ mod_details = ModDetails { md_types = mkTypeEnv local_things,
+ md_insts = map iDFunId local_inst_info,
+ md_rules = [(id,rule) | IfaceRuleOut id rule <- local_rules],
+ md_binds = [] }
+ -- All the rules from an interface are of the IfaceRuleOut form
+ in
+ returnTc (new_pcs, mod_details)
tcImports :: RecTcEnv
-> PersistentCompilerState
RenamedHsBinds, [TypecheckedRuleDecl])
-- tcImports is a slight mis-nomer.
--- It deals with everythign that could be an import:
+-- It deals with everything that could be an import:
-- type and class decls
--- interface signatures
+-- interface signatures (checked lazily)
-- instance decls
-- rule decls
-- These can occur in source code too, of course
\begin{code}
typecheck :: DynFlags
- -> SyntaxMap
-> PersistentCompilerState
-> HomeSymbolTable
-> PrintUnqualified -- For error printing
-> TcM r
-> IO (Maybe r)
-typecheck dflags syn_map pcs hst unqual thing_inside
+typecheck dflags pcs hst unqual thing_inside
= do { showPass dflags "Typechecker";
- ; env <- initTcEnv syn_map hst (pcs_PTE pcs)
+ ; env <- initTcEnv hst (pcs_PTE pcs)
; (maybe_tc_result, errs) <- initTc dflags env thing_inside
%************************************************************************
\begin{code}
-printTcDump dflags Nothing = return ()
-printTcDump dflags (Just (_, results))
- = do dumpIfSet_dyn dflags Opt_D_dump_types
- "Type signatures" (dump_sigs (tc_env results))
- dumpIfSet_dyn dflags Opt_D_dump_tc
- "Typechecked" (dump_tc results)
+printTcDump dflags unqual Nothing = return ()
+printTcDump dflags unqual (Just (_, results))
+ = do if dopt Opt_D_dump_types dflags || dopt Opt_D_dump_tc dflags then
+ printForUser stdout unqual (dump_tc_iface dflags results)
+ else return ()
-printIfaceDump dflags Nothing = return ()
-printIfaceDump dflags (Just (_, env, rules))
- = do dumpIfSet_dyn dflags Opt_D_dump_types
- "Type signatures" (dump_sigs env)
dumpIfSet_dyn dflags Opt_D_dump_tc
- "Typechecked" (dump_iface env rules)
+ "Typechecked" (ppr (tc_binds results))
-dump_tc results
- = vcat [ppr (tc_binds results),
- pp_rules (tc_rules results),
- ppr_gen_tycons [tc | ATyCon tc <- nameEnvElts (tc_env results)]
- ]
-
-dump_iface env rules
- = vcat [pp_rules rules,
- ppr_gen_tycons [tc | ATyCon tc <- nameEnvElts env]
- ]
-
-dump_sigs env -- Print type signatures
- = -- Convert to HsType so that we get source-language style printing
- -- And sort by RdrName
- vcat $ map ppr_sig $ sortLt lt_sig $
- [ (toRdrName id, toHsType (idType id))
- | AnId id <- nameEnvElts env,
- want_sig id
+
+printIfaceDump dflags Nothing = return ()
+printIfaceDump dflags (Just (_, details))
+ = dumpIfSet_dyn_or dflags [Opt_D_dump_types, Opt_D_dump_tc]
+ "Interface" (pprModDetails details)
+
+dump_tc_iface dflags results
+ = vcat [pprModDetails (ModDetails {md_types = tc_env results,
+ md_insts = tc_insts results,
+ md_rules = [], md_binds = []}) ,
+ ppr_rules (tc_rules results),
+
+ if dopt Opt_Generics dflags then
+ ppr_gen_tycons [tc | ATyCon tc <- nameEnvElts (tc_env results)]
+ else
+ empty
]
- where
- lt_sig (n1,_) (n2,_) = n1 < n2
- ppr_sig (n,t) = ppr n <+> dcolon <+> ppr t
- want_sig id | opt_PprStyle_Debug = True
- | otherwise = isLocalId id && isGlobalName (idName id)
- -- isLocalId ignores data constructors, records selectors etc
- -- The isGlobalName ignores local dictionary and method bindings
- -- that the type checker has invented. User-defined things have
- -- Global names.
+ppr_rules [] = empty
+ppr_rules rs = vcat [ptext SLIT("{-# RULES"),
+ nest 4 (vcat (map ppr rs)),
+ ptext SLIT("#-}")]
ppr_gen_tycons tcs = vcat [ptext SLIT("{-# Generic type constructor details"),
vcat (map ppr_gen_tycon tcs),
| otherwise = ppr tycon <> colon <+> ptext SLIT("Not derivable")
ppr_ep (EP from to)
- = vcat [ ptext SLIT("Rep type:") <+> ppr (funResultTy from_tau),
+ = vcat [ ptext SLIT("Rep type:") <+> ppr (tcFunResultTy from_tau),
ptext SLIT("From:") <+> ppr (unfoldingTemplate (idUnfolding from)),
ptext SLIT("To:") <+> ppr (unfoldingTemplate (idUnfolding to))
]
where
- (_,from_tau) = splitForAllTys (idType from)
-
-pp_rules [] = empty
-pp_rules rs = vcat [ptext SLIT("{-# RULES"),
- nest 4 (vcat (map ppr rs)),
- ptext SLIT("#-}")]
+ (_,from_tau) = tcSplitForAllTys (idType from)
\end{code}
projects / ghc-hetmet.git / blobdiff