#ifdef GHCI /* Only if bootstrapped */
import {-# SOURCE #-} TcSplice( tcSpliceExpr, tcBracket )
-import HsSyn ( HsReify(..), ReifyFlavour(..) )
+import Id ( Id )
import TcType ( isTauTy )
-import TcEnv ( bracketOK, tcMetaTy, checkWellStaged )
-import Name ( isExternalName )
+import TcEnv ( checkWellStaged )
+import HsSyn ( nlHsApp )
import qualified DsMeta
#endif
-import HsSyn ( HsExpr(..), HsLit(..), ArithSeqInfo(..), recBindFields )
-import RnHsSyn ( RenamedHsExpr, RenamedRecordBinds )
-import TcHsSyn ( TcExpr, TcRecordBinds, hsLitType, mkHsDictApp, mkHsTyApp, mkHsLet, (<$>) )
+import HsSyn ( HsExpr(..), LHsExpr, HsLit(..), ArithSeqInfo(..), recBindFields,
+ HsMatchContext(..), HsRecordBinds, mkHsApp, nlHsVar )
+import TcHsSyn ( hsLitType, mkHsDictApp, mkHsTyApp, (<$>) )
import TcRnMonad
import TcUnify ( Expected(..), newHole, zapExpectedType, zapExpectedTo, tcSubExp, tcGen,
unifyFunTy, zapToListTy, zapToPArrTy, zapToTupleTy )
instToId, tcInstCall, tcInstDataCon
)
import TcBinds ( tcBindsAndThen )
-import TcEnv ( tcLookupClass, tcLookupGlobal_maybe, tcLookup,
- tcLookupTyCon, tcLookupDataCon, tcLookupId, checkProcLevel
+import TcEnv ( tcLookup, tcLookupId, checkProcLevel,
+ tcLookupDataCon, tcLookupGlobalId
)
import TcArrows ( tcProc )
-import TcMatches ( tcMatchesCase, tcMatchLambda, tcDoStmts, tcThingWithSig )
-import TcMonoType ( tcHsSigType, UserTypeCtxt(..) )
+import TcMatches ( tcMatchesCase, tcMatchLambda, tcDoStmts, tcThingWithSig, TcMatchCtxt(..) )
+import TcHsType ( tcHsSigType, UserTypeCtxt(..) )
import TcPat ( badFieldCon )
-import TcMType ( tcInstTyVars, tcInstType, newTyVarTy, newTyVarTys, zonkTcType )
+import TcMType ( tcInstTyVars, tcInstType, newTyVarTy, zonkTcType )
import TcType ( TcType, TcSigmaType, TcRhoType, TyVarDetails(VanillaTv),
tcSplitFunTys, tcSplitTyConApp, mkTyVarTys,
isSigmaTy, mkFunTy, mkFunTys,
- mkTyConApp, mkClassPred,
- tyVarsOfTypes, isLinearPred,
- liftedTypeKind, openTypeKind,
+ mkTyConApp, tyVarsOfTypes, isLinearPred,
tcSplitSigmaTy, tidyOpenType
)
+import Kind ( openTypeKind, liftedTypeKind, argTypeKind )
+
import FieldLabel ( FieldLabel, fieldLabelName, fieldLabelType, fieldLabelTyCon )
-import Id ( Id, idType, recordSelectorFieldLabel, isRecordSelector )
-import DataCon ( DataCon, dataConFieldLabels, dataConSig, dataConStrictMarks, dataConWrapId )
+import Id ( idType, recordSelectorFieldLabel, isRecordSelector )
+import DataCon ( DataCon, dataConFieldLabels, dataConStrictMarks, dataConWrapId )
import Name ( Name )
-import TyCon ( TyCon, tyConTyVars, tyConTheta, isAlgTyCon, tyConDataCons )
+import TyCon ( TyCon, tyConTyVars, tyConTheta, tyConDataCons )
import Subst ( mkTopTyVarSubst, substTheta, substTy )
import VarSet ( emptyVarSet, elemVarSet )
import TysWiredIn ( boolTy )
-import PrelNames ( cCallableClassName, cReturnableClassName,
- enumFromName, enumFromThenName,
+import PrelNames ( enumFromName, enumFromThenName,
enumFromToName, enumFromThenToName,
- enumFromToPName, enumFromThenToPName,
- ioTyConName
+ enumFromToPName, enumFromThenToPName
)
import ListSetOps ( minusList )
import CmdLineOpts
import HscTypes ( TyThing(..) )
-
+import SrcLoc ( Located(..), unLoc, getLoc )
import Util
import Outputable
import FastString
+
+#ifdef DEBUG
+import TyCon ( isAlgTyCon )
+#endif
\end{code}
%************************************************************************
\begin{code}
-- tcCheckSigma does type *checking*; it's passed the expected type of the result
-tcCheckSigma :: RenamedHsExpr -- Expession to type check
+tcCheckSigma :: LHsExpr Name -- Expession to type check
-> TcSigmaType -- Expected type (could be a polytpye)
- -> TcM TcExpr -- Generalised expr with expected type
+ -> TcM (LHsExpr TcId) -- Generalised expr with expected type
tcCheckSigma expr expected_ty
= traceTc (text "tcExpr" <+> (ppr expected_ty $$ ppr expr)) `thenM_`
= tcGen sigma_ty emptyVarSet (
\ rho_ty -> tcCheckRho expr rho_ty
) `thenM` \ (gen_fn, expr') ->
- returnM (gen_fn <$> expr')
+ returnM (L (getLoc expr') (gen_fn <$> unLoc expr'))
tc_expr' expr rho_ty -- Monomorphic case
= tcCheckRho expr rho_ty
so we must create a hole to pass in as the expected tyvar.
\begin{code}
-tcCheckRho :: RenamedHsExpr -> TcRhoType -> TcM TcExpr
+tcCheckRho :: LHsExpr Name -> TcRhoType -> TcM (LHsExpr TcId)
tcCheckRho expr rho_ty = tcMonoExpr expr (Check rho_ty)
-tcInferRho :: RenamedHsExpr -> TcM (TcExpr, TcRhoType)
-tcInferRho (HsVar name) = tcId name
-tcInferRho expr = newHole `thenM` \ hole ->
- tcMonoExpr expr (Infer hole) `thenM` \ expr' ->
- readMutVar hole `thenM` \ rho_ty ->
- returnM (expr', rho_ty)
+tcInferRho :: LHsExpr Name -> TcM (LHsExpr TcId, TcRhoType)
+tcInferRho (L loc (HsVar name)) = addSrcSpan loc $
+ do { (e,ty) <- tcId name; return (L loc e, ty)}
+tcInferRho expr = newHole `thenM` \ hole ->
+ tcMonoExpr expr (Infer hole) `thenM` \ expr' ->
+ readMutVar hole `thenM` \ rho_ty ->
+ returnM (expr', rho_ty)
\end{code}
%************************************************************************
%* *
-\subsection{The TAUT rules for variables}
+\subsection{The TAUT rules for variables}TcExpr
%* *
%************************************************************************
\begin{code}
-tcMonoExpr :: RenamedHsExpr -- Expession to type check
+tcMonoExpr :: LHsExpr Name -- Expession to type check
-> Expected TcRhoType -- Expected type (could be a type variable)
-- Definitely no foralls at the top
-- Can be a 'hole'.
- -> TcM TcExpr
+ -> TcM (LHsExpr TcId)
+
+tcMonoExpr (L loc expr) res_ty
+ = addSrcSpan loc (do { expr' <- tc_expr expr res_ty
+ ; return (L loc expr') })
-tcMonoExpr (HsVar name) res_ty
+tc_expr :: HsExpr Name -> Expected TcRhoType -> TcM (HsExpr TcId)
+tc_expr (HsVar name) res_ty
= tcId name `thenM` \ (expr', id_ty) ->
tcSubExp res_ty id_ty `thenM` \ co_fn ->
returnM (co_fn <$> expr')
-tcMonoExpr (HsIPVar ip) res_ty
+tc_expr (HsIPVar ip) res_ty
= -- Implicit parameters must have a *tau-type* not a
-- type scheme. We enforce this by creating a fresh
-- type variable as its type. (Because res_ty may not
-- be a tau-type.)
- newTyVarTy openTypeKind `thenM` \ ip_ty ->
- newIPDict (IPOcc ip) ip ip_ty `thenM` \ (ip', inst) ->
+ newTyVarTy argTypeKind `thenM` \ ip_ty ->
+ -- argTypeKind: it can't be an unboxed tuple
+ newIPDict (IPOccOrigin ip) ip ip_ty `thenM` \ (ip', inst) ->
extendLIE inst `thenM_`
tcSubExp res_ty ip_ty `thenM` \ co_fn ->
returnM (co_fn <$> HsIPVar ip')
%************************************************************************
\begin{code}
-tcMonoExpr in_expr@(ExprWithTySig expr poly_ty) res_ty
- = addErrCtxt (exprSigCtxt in_expr) $
+tc_expr in_expr@(ExprWithTySig expr poly_ty) res_ty
+ = addErrCtxt (exprCtxt in_expr) $
tcHsSigType ExprSigCtxt poly_ty `thenM` \ sig_tc_ty ->
tcThingWithSig sig_tc_ty (tcCheckRho expr) res_ty `thenM` \ (co_fn, expr') ->
- returnM (co_fn <$> expr')
+ returnM (co_fn <$> unLoc expr')
+ -- ToDo: nasty unLoc
-tcMonoExpr (HsType ty) res_ty
+tc_expr (HsType ty) res_ty
= failWithTc (text "Can't handle type argument:" <+> ppr ty)
-- This is the syntax for type applications that I was planning
-- but there are difficulties (e.g. what order for type args)
%************************************************************************
\begin{code}
-tcMonoExpr (HsLit lit) res_ty = tcLit lit res_ty
-tcMonoExpr (HsOverLit lit) res_ty = zapExpectedType res_ty `thenM` \ res_ty' ->
- newOverloadedLit (LiteralOrigin lit) lit res_ty'
-tcMonoExpr (HsPar expr) res_ty = tcMonoExpr expr res_ty `thenM` \ expr' ->
- returnM (HsPar expr')
-tcMonoExpr (HsSCC lbl expr) res_ty = tcMonoExpr expr res_ty `thenM` \ expr' ->
- returnM (HsSCC lbl expr')
-
-tcMonoExpr (HsCoreAnn lbl expr) res_ty = tcMonoExpr expr res_ty `thenM` \ expr' -> -- hdaume: core annotation
+tc_expr (HsPar expr) res_ty = tcMonoExpr expr res_ty `thenM` \ expr' ->
+ returnM (HsPar expr')
+tc_expr (HsSCC lbl expr) res_ty = tcMonoExpr expr res_ty `thenM` \ expr' ->
+ returnM (HsSCC lbl expr')
+tc_expr (HsCoreAnn lbl expr) res_ty = tcMonoExpr expr res_ty `thenM` \ expr' -> -- hdaume: core annotation
returnM (HsCoreAnn lbl expr')
-tcMonoExpr (NegApp expr neg_name) res_ty
- = tcMonoExpr (HsApp (HsVar neg_name) expr) res_ty
+
+tc_expr (HsLit lit) res_ty = tcLit lit res_ty
+
+tc_expr (HsOverLit lit) res_ty
+ = zapExpectedType res_ty liftedTypeKind `thenM` \ res_ty' ->
+ newOverloadedLit (LiteralOrigin lit) lit res_ty' `thenM` \ lit_expr ->
+ returnM (unLoc lit_expr) -- ToDo: nasty unLoc
+
+tc_expr (NegApp expr neg_name) res_ty
+ = tc_expr (HsApp (nlHsVar neg_name) expr) res_ty
-- ToDo: use tcSyntaxName
-tcMonoExpr (HsLam match) res_ty
+tc_expr (HsLam match) res_ty
= tcMatchLambda match res_ty `thenM` \ match' ->
returnM (HsLam match')
-tcMonoExpr (HsApp e1 e2) res_ty
+tc_expr (HsApp e1 e2) res_ty
= tcApp e1 [e2] res_ty
\end{code}
-- or just
-- op e
-tcMonoExpr in_expr@(SectionL arg1 op) res_ty
+tc_expr in_expr@(SectionL arg1 op) res_ty
= tcInferRho op `thenM` \ (op', op_ty) ->
split_fun_ty op_ty 2 {- two args -} `thenM` \ ([arg1_ty, arg2_ty], op_res_ty) ->
tcArg op (arg1, arg1_ty, 1) `thenM` \ arg1' ->
-- Right sections, equivalent to \ x -> x op expr, or
-- \ x -> op x expr
-tcMonoExpr in_expr@(SectionR op arg2) res_ty
+tc_expr in_expr@(SectionR op arg2) res_ty
= tcInferRho op `thenM` \ (op', op_ty) ->
split_fun_ty op_ty 2 {- two args -} `thenM` \ ([arg1_ty, arg2_ty], op_res_ty) ->
tcArg op (arg2, arg2_ty, 2) `thenM` \ arg2' ->
-- equivalent to (op e1) e2:
-tcMonoExpr in_expr@(OpApp arg1 op fix arg2) res_ty
+tc_expr in_expr@(OpApp arg1 op fix arg2) res_ty
= tcInferRho op `thenM` \ (op', op_ty) ->
split_fun_ty op_ty 2 {- two args -} `thenM` \ ([arg1_ty, arg2_ty], op_res_ty) ->
tcArg op (arg1, arg1_ty, 1) `thenM` \ arg1' ->
\end{code}
\begin{code}
-tcMonoExpr (HsLet binds expr) res_ty
+tc_expr (HsLet binds (L loc expr)) res_ty
= tcBindsAndThen
- HsLet
+ glue
binds -- Bindings to check
- (tcMonoExpr expr res_ty)
+ (tc_expr expr res_ty)
+ where
+ glue bind expr = HsLet [bind] (L loc expr)
-tcMonoExpr in_expr@(HsCase scrut matches src_loc) res_ty
- = addSrcLoc src_loc $
- addErrCtxt (caseCtxt in_expr) $
+tc_expr in_expr@(HsCase scrut matches) res_ty
+ = addErrCtxt (caseCtxt in_expr) $
-- Typecheck the case alternatives first.
-- The case patterns tend to give good type info to use
-- (x:xs) -> ...
-- will report that map is applied to too few arguments
- tcMatchesCase matches res_ty `thenM` \ (scrut_ty, matches') ->
+ tcMatchesCase match_ctxt matches res_ty `thenM` \ (scrut_ty, matches') ->
addErrCtxt (caseScrutCtxt scrut) (
tcCheckRho scrut scrut_ty
) `thenM` \ scrut' ->
- returnM (HsCase scrut' matches' src_loc)
+ returnM (HsCase scrut' matches')
+ where
+ match_ctxt = MC { mc_what = CaseAlt,
+ mc_body = tcMonoExpr }
-tcMonoExpr (HsIf pred b1 b2 src_loc) res_ty
- = addSrcLoc src_loc $
- addErrCtxt (predCtxt pred) (
+tc_expr (HsIf pred b1 b2) res_ty
+ = addErrCtxt (predCtxt pred) (
tcCheckRho pred boolTy ) `thenM` \ pred' ->
- zapExpectedType res_ty `thenM` \ res_ty' ->
+ zapExpectedType res_ty openTypeKind `thenM` \ res_ty' ->
-- C.f. the call to zapToType in TcMatches.tcMatches
tcCheckRho b1 res_ty' `thenM` \ b1' ->
tcCheckRho b2 res_ty' `thenM` \ b2' ->
- returnM (HsIf pred' b1' b2' src_loc)
+ returnM (HsIf pred' b1' b2')
-tcMonoExpr (HsDo do_or_lc stmts method_names _ src_loc) res_ty
- = addSrcLoc src_loc $
- zapExpectedType res_ty `thenM` \ res_ty' ->
- -- All comprehensions yield a monotype
+tc_expr (HsDo do_or_lc stmts method_names _) res_ty
+ = zapExpectedType res_ty liftedTypeKind `thenM` \ res_ty' ->
+ -- All comprehensions yield a monotype of kind *
tcDoStmts do_or_lc stmts method_names res_ty' `thenM` \ (stmts', methods') ->
- returnM (HsDo do_or_lc stmts' methods' res_ty' src_loc)
+ returnM (HsDo do_or_lc stmts' methods' res_ty')
-tcMonoExpr in_expr@(ExplicitList _ exprs) res_ty -- Non-empty list
+tc_expr in_expr@(ExplicitList _ exprs) res_ty -- Non-empty list
= zapToListTy res_ty `thenM` \ elt_ty ->
mappM (tc_elt elt_ty) exprs `thenM` \ exprs' ->
returnM (ExplicitList elt_ty exprs')
= addErrCtxt (listCtxt expr) $
tcCheckRho expr elt_ty
-tcMonoExpr in_expr@(ExplicitPArr _ exprs) res_ty -- maybe empty
+tc_expr in_expr@(ExplicitPArr _ exprs) res_ty -- maybe empty
= zapToPArrTy res_ty `thenM` \ elt_ty ->
mappM (tc_elt elt_ty) exprs `thenM` \ exprs' ->
returnM (ExplicitPArr elt_ty exprs')
= addErrCtxt (parrCtxt expr) $
tcCheckRho expr elt_ty
-tcMonoExpr (ExplicitTuple exprs boxity) res_ty
+tc_expr (ExplicitTuple exprs boxity) res_ty
= zapToTupleTy boxity (length exprs) res_ty `thenM` \ arg_tys ->
tcCheckRhos exprs arg_tys `thenM` \ exprs' ->
returnM (ExplicitTuple exprs' boxity)
-tcMonoExpr (HsProc pat cmd loc) res_ty
- = addSrcLoc loc $
- tcProc pat cmd res_ty `thenM` \ (pat', cmd') ->
- returnM (HsProc pat' cmd' loc)
+tc_expr (HsProc pat cmd) res_ty
+ = tcProc pat cmd res_ty `thenM` \ (pat', cmd') ->
+ returnM (HsProc pat' cmd')
\end{code}
-
-%************************************************************************
-%* *
- Foreign calls
-%* *
-%************************************************************************
-
-The interesting thing about @ccall@ is that it is just a template
-which we instantiate by filling in details about the types of its
-argument and result (ie minimal typechecking is performed). So, the
-basic story is that we allocate a load of type variables (to hold the
-arg/result types); unify them with the args/result; and store them for
-later use.
-
-\begin{code}
-tcMonoExpr e0@(HsCCall lbl args may_gc is_casm ignored_fake_result_ty) res_ty
-
- = getDOpts `thenM` \ dflags ->
-
- checkTc (not (is_casm && dopt_HscLang dflags /= HscC))
- (vcat [text "_casm_ is only supported when compiling via C (-fvia-C).",
- text "Either compile with -fvia-C, or, better, rewrite your code",
- text "to use the foreign function interface. _casm_s are deprecated",
- text "and support for them may one day disappear."])
- `thenM_`
-
- -- Get the callable and returnable classes.
- tcLookupClass cCallableClassName `thenM` \ cCallableClass ->
- tcLookupClass cReturnableClassName `thenM` \ cReturnableClass ->
- tcLookupTyCon ioTyConName `thenM` \ ioTyCon ->
- let
- new_arg_dict (arg, arg_ty)
- = newDicts (CCallOrigin (unpackFS lbl) (Just arg))
- [mkClassPred cCallableClass [arg_ty]] `thenM` \ arg_dicts ->
- returnM arg_dicts -- Actually a singleton bag
-
- result_origin = CCallOrigin (unpackFS lbl) Nothing {- Not an arg -}
- in
-
- -- Arguments
- let tv_idxs | null args = []
- | otherwise = [1..length args]
- in
- newTyVarTys (length tv_idxs) openTypeKind `thenM` \ arg_tys ->
- tcCheckRhos args arg_tys `thenM` \ args' ->
-
- -- The argument types can be unlifted or lifted; the result
- -- type must, however, be lifted since it's an argument to the IO
- -- type constructor.
- newTyVarTy liftedTypeKind `thenM` \ result_ty ->
- let
- io_result_ty = mkTyConApp ioTyCon [result_ty]
- in
- zapExpectedTo res_ty io_result_ty `thenM_`
-
- -- Construct the extra insts, which encode the
- -- constraints on the argument and result types.
- mappM new_arg_dict (zipEqual "tcMonoExpr:CCall" args arg_tys) `thenM` \ ccarg_dicts_s ->
- newDicts result_origin [mkClassPred cReturnableClass [result_ty]] `thenM` \ ccres_dict ->
- extendLIEs (ccres_dict ++ concat ccarg_dicts_s) `thenM_`
- returnM (HsCCall lbl args' may_gc is_casm io_result_ty)
-\end{code}
-
-
%************************************************************************
%* *
Record construction and update
%************************************************************************
\begin{code}
-tcMonoExpr expr@(RecordCon con_name rbinds) res_ty
+tc_expr expr@(RecordCon con@(L _ con_name) rbinds) res_ty
= addErrCtxt (recordConCtxt expr) $
- tcId con_name `thenM` \ (con_expr, con_tau) ->
+ addLocM tcId con `thenM` \ (con_expr, con_tau) ->
let
(_, record_ty) = tcSplitFunTys con_tau
(tycon, ty_args) = tcSplitTyConApp record_ty
-- Check for missing fields
checkMissingFields data_con rbinds `thenM_`
- returnM (RecordConOut data_con con_expr rbinds')
+ getSrcSpanM `thenM` \ loc ->
+ returnM (RecordConOut data_con (L loc con_expr) rbinds')
-- The main complication with RecordUpd is that we need to explicitly
-- handle the *non-updated* fields. Consider:
--
-- All this is done in STEP 4 below.
-tcMonoExpr expr@(RecordUpd record_expr rbinds) res_ty
+tc_expr expr@(RecordUpd record_expr rbinds) res_ty
= addErrCtxt (recordUpdCtxt expr) $
-- STEP 0
-- Check that the field names are really field names
ASSERT( notNull rbinds )
let
- field_names = recBindFields rbinds
+ field_names = map fst rbinds
in
- mappM tcLookupGlobal_maybe field_names `thenM` \ maybe_sel_ids ->
+ mappM (tcLookupGlobalId.unLoc) field_names `thenM` \ sel_ids ->
+ -- The renamer has already checked that they
+ -- are all in scope
let
- bad_guys = [ addErrTc (notSelector field_name)
- | (field_name, maybe_sel_id) <- field_names `zip` maybe_sel_ids,
- not (is_selector maybe_sel_id)
+ bad_guys = [ addSrcSpan loc $ addErrTc (notSelector field_name)
+ | (L loc field_name, sel_id) <- field_names `zip` sel_ids,
+ not (isRecordSelector sel_id) -- Excludes class ops
]
- is_selector (Just (AnId sel_id)) = isRecordSelector sel_id -- Excludes class ops
- is_selector other = False
in
checkM (null bad_guys) (sequenceM bad_guys `thenM_` failM) `thenM_`
-- Figure out the tycon and data cons from the first field name
let
-- It's OK to use the non-tc splitters here (for a selector)
- (Just (AnId sel_id) : _) = maybe_sel_ids
+ sel_id : _ = sel_ids
field_lbl = recordSelectorFieldLabel sel_id -- We've failed already if
tycon = fieldLabelTyCon field_lbl -- it's not a field label
data_cons = tyConDataCons tycon
%************************************************************************
\begin{code}
-tcMonoExpr (ArithSeqIn seq@(From expr)) res_ty
+tc_expr (ArithSeqIn seq@(From expr)) res_ty
= zapToListTy res_ty `thenM` \ elt_ty ->
tcCheckRho expr elt_ty `thenM` \ expr' ->
newMethodFromName (ArithSeqOrigin seq)
elt_ty enumFromName `thenM` \ enum_from ->
- returnM (ArithSeqOut (HsVar enum_from) (From expr'))
+ returnM (ArithSeqOut (nlHsVar enum_from) (From expr'))
-tcMonoExpr in_expr@(ArithSeqIn seq@(FromThen expr1 expr2)) res_ty
+tc_expr in_expr@(ArithSeqIn seq@(FromThen expr1 expr2)) res_ty
= addErrCtxt (arithSeqCtxt in_expr) $
zapToListTy res_ty `thenM` \ elt_ty ->
tcCheckRho expr1 elt_ty `thenM` \ expr1' ->
newMethodFromName (ArithSeqOrigin seq)
elt_ty enumFromThenName `thenM` \ enum_from_then ->
- returnM (ArithSeqOut (HsVar enum_from_then) (FromThen expr1' expr2'))
+ returnM (ArithSeqOut (nlHsVar enum_from_then) (FromThen expr1' expr2'))
-tcMonoExpr in_expr@(ArithSeqIn seq@(FromTo expr1 expr2)) res_ty
+tc_expr in_expr@(ArithSeqIn seq@(FromTo expr1 expr2)) res_ty
= addErrCtxt (arithSeqCtxt in_expr) $
zapToListTy res_ty `thenM` \ elt_ty ->
tcCheckRho expr1 elt_ty `thenM` \ expr1' ->
newMethodFromName (ArithSeqOrigin seq)
elt_ty enumFromToName `thenM` \ enum_from_to ->
- returnM (ArithSeqOut (HsVar enum_from_to) (FromTo expr1' expr2'))
+ returnM (ArithSeqOut (nlHsVar enum_from_to) (FromTo expr1' expr2'))
-tcMonoExpr in_expr@(ArithSeqIn seq@(FromThenTo expr1 expr2 expr3)) res_ty
+tc_expr in_expr@(ArithSeqIn seq@(FromThenTo expr1 expr2 expr3)) res_ty
= addErrCtxt (arithSeqCtxt in_expr) $
zapToListTy res_ty `thenM` \ elt_ty ->
tcCheckRho expr1 elt_ty `thenM` \ expr1' ->
newMethodFromName (ArithSeqOrigin seq)
elt_ty enumFromThenToName `thenM` \ eft ->
- returnM (ArithSeqOut (HsVar eft) (FromThenTo expr1' expr2' expr3'))
+ returnM (ArithSeqOut (nlHsVar eft) (FromThenTo expr1' expr2' expr3'))
-tcMonoExpr in_expr@(PArrSeqIn seq@(FromTo expr1 expr2)) res_ty
+tc_expr in_expr@(PArrSeqIn seq@(FromTo expr1 expr2)) res_ty
= addErrCtxt (parrSeqCtxt in_expr) $
zapToPArrTy res_ty `thenM` \ elt_ty ->
tcCheckRho expr1 elt_ty `thenM` \ expr1' ->
newMethodFromName (PArrSeqOrigin seq)
elt_ty enumFromToPName `thenM` \ enum_from_to ->
- returnM (PArrSeqOut (HsVar enum_from_to) (FromTo expr1' expr2'))
+ returnM (PArrSeqOut (nlHsVar enum_from_to) (FromTo expr1' expr2'))
-tcMonoExpr in_expr@(PArrSeqIn seq@(FromThenTo expr1 expr2 expr3)) res_ty
+tc_expr in_expr@(PArrSeqIn seq@(FromThenTo expr1 expr2 expr3)) res_ty
= addErrCtxt (parrSeqCtxt in_expr) $
zapToPArrTy res_ty `thenM` \ elt_ty ->
tcCheckRho expr1 elt_ty `thenM` \ expr1' ->
newMethodFromName (PArrSeqOrigin seq)
elt_ty enumFromThenToPName `thenM` \ eft ->
- returnM (PArrSeqOut (HsVar eft) (FromThenTo expr1' expr2' expr3'))
+ returnM (PArrSeqOut (nlHsVar eft) (FromThenTo expr1' expr2' expr3'))
-tcMonoExpr (PArrSeqIn _) _
+tc_expr (PArrSeqIn _) _
= panic "TcExpr.tcMonoExpr: Infinite parallel array!"
-- the parser shouldn't have generated it and the renamer shouldn't have
-- let it through
\begin{code}
#ifdef GHCI /* Only if bootstrapped */
-- Rename excludes these cases otherwise
-
-tcMonoExpr (HsSplice n expr loc) res_ty = addSrcLoc loc (tcSpliceExpr n expr res_ty)
-tcMonoExpr (HsBracket brack loc) res_ty = addSrcLoc loc (tcBracket brack res_ty)
-
-tcMonoExpr (HsReify (Reify flavour name)) res_ty
- = addErrCtxt (ptext SLIT("At the reification of") <+> ppr name) $
- tcMetaTy tycon_name `thenM` \ reify_ty ->
- zapExpectedTo res_ty reify_ty `thenM_`
- returnM (HsReify (ReifyOut flavour name))
- where
- tycon_name = case flavour of
- ReifyDecl -> DsMeta.decQTyConName
- ReifyType -> DsMeta.typeQTyConName
- ReifyFixity -> pprPanic "tcMonoExpr: cant do reifyFixity yet" (ppr name)
+tc_expr (HsSpliceE splice) res_ty = tcSpliceExpr splice res_ty
+tc_expr (HsBracket brack) res_ty = do { e <- tcBracket brack res_ty
+ ; return (unLoc e) }
#endif /* GHCI */
\end{code}
%************************************************************************
\begin{code}
-tcMonoExpr other _ = pprPanic "tcMonoExpr" (ppr other)
+tc_expr other _ = pprPanic "tcMonoExpr" (ppr other)
\end{code}
\begin{code}
-tcApp :: RenamedHsExpr -> [RenamedHsExpr] -- Function and args
+tcApp :: LHsExpr Name -> [LHsExpr Name] -- Function and args
-> Expected TcRhoType -- Expected result type of application
- -> TcM TcExpr -- Translated fun and args
+ -> TcM (HsExpr TcId) -- Translated fun and args
-tcApp (HsApp e1 e2) args res_ty
+tcApp (L _ (HsApp e1 e2)) args res_ty
= tcApp e1 (e2:args) res_ty -- Accumulate the arguments
tcApp fun args res_ty
mappM (tcArg fun)
(zip3 args expected_arg_tys [1..]) `thenM` \ args' ->
- returnM (co_fn <$> foldl HsApp fun' args')
+ returnM (co_fn <$> unLoc (foldl mkHsApp fun' args'))
-- If an error happens we try to figure out whether the
\end{code}
\begin{code}
-tcArg :: RenamedHsExpr -- The function (for error messages)
- -> (RenamedHsExpr, TcSigmaType, Int) -- Actual argument and expected arg type
- -> TcM TcExpr -- Resulting argument and LIE
+tcArg :: LHsExpr Name -- The function (for error messages)
+ -> (LHsExpr Name, TcSigmaType, Int) -- Actual argument and expected arg type
+ -> TcM (LHsExpr TcId) -- Resulting argument
tcArg the_fun (arg, expected_arg_ty, arg_no)
= addErrCtxt (funAppCtxt the_fun arg arg_no) $
b) perhaps fewer separated lambdas
\begin{code}
-tcId :: Name -> TcM (TcExpr, TcRhoType)
+tcId :: Name -> TcM (HsExpr TcId, TcRhoType)
tcId name -- Look up the Id and instantiate its type
= -- First check whether it's a DataCon
-- Reason: we must not forget to chuck in the
-- constraints from their "silly context"
- tcLookup name `thenM` \ maybe_thing ->
- case maybe_thing of {
+ tcLookup name `thenM` \ thing ->
+ case thing of {
AGlobal (ADataCon data_con) -> inst_data_con data_con
; AGlobal (AnId id) -> loop (HsVar id) (idType id)
-- A global cannot possibly be ill-staged
-- nor does it need the 'lifting' treatment
; ATcId id th_level proc_level -> tc_local_id id th_level proc_level
- ; other -> pprPanic "tcId" (ppr name)
+ ; other -> pprPanic "tcId" (ppr name $$ ppr thing)
}
where
-- Update the pending splices
readMutVar ps_var `thenM` \ ps ->
- writeMutVar ps_var ((name, HsApp (HsVar lift) (HsVar id)) : ps) `thenM_`
+ writeMutVar ps_var ((name, nlHsApp (nlHsVar lift) (nlHsVar id)) : ps) `thenM_`
returnM (HsVar id, id_ty))
inst_data_con data_con
= tcInstDataCon orig data_con `thenM` \ (ty_args, ex_dicts, arg_tys, result_ty, _) ->
extendLIEs ex_dicts `thenM_`
- returnM (mkHsDictApp (mkHsTyApp (HsVar (dataConWrapId data_con)) ty_args)
- (map instToId ex_dicts),
+ getSrcSpanM `thenM` \ loc ->
+ returnM (unLoc (mkHsDictApp (mkHsTyApp (L loc (HsVar (dataConWrapId data_con))) ty_args)
+ (map instToId ex_dicts)),
mkFunTys arg_tys result_ty)
+ -- ToDo: nasty loc/unloc stuff here
orig = OccurrenceOf name
\end{code}
tcRecordBinds
:: TyCon -- Type constructor for the record
-> [TcType] -- Args of this type constructor
- -> RenamedRecordBinds
- -> TcM TcRecordBinds
+ -> HsRecordBinds Name
+ -> TcM (HsRecordBinds TcId)
tcRecordBinds tycon ty_args rbinds
= mappM do_bind rbinds
where
tenv = mkTopTyVarSubst (tyConTyVars tycon) ty_args
- do_bind (field_lbl_name, rhs)
+ do_bind (L loc field_lbl_name, rhs)
= addErrCtxt (fieldCtxt field_lbl_name) $
- tcLookupId field_lbl_name `thenM` \ sel_id ->
+ tcLookupId field_lbl_name `thenM` \ sel_id ->
let
field_lbl = recordSelectorFieldLabel sel_id
field_ty = substTy tenv (fieldLabelType field_lbl)
tcCheckSigma rhs field_ty `thenM` \ rhs' ->
- returnM (sel_id, rhs')
+ returnM (L loc sel_id, rhs')
badFields rbinds data_con
= filter (not . (`elem` field_names)) (recBindFields rbinds)
where
field_names = map fieldLabelName (dataConFieldLabels data_con)
-checkMissingFields :: DataCon -> RenamedRecordBinds -> TcM ()
+checkMissingFields :: DataCon -> HsRecordBinds Name -> TcM ()
checkMissingFields data_con rbinds
| null field_labels -- Not declared as a record;
-- But C{} is still valid if no strict fields
field_labels
field_strs
- field_strs = dropList ex_theta (dataConStrictMarks data_con)
- -- The 'drop' is because dataConStrictMarks
- -- includes the existential dictionaries
- (_, _, _, ex_theta, _, _) = dataConSig data_con
+ field_strs = dataConStrictMarks data_con
\end{code}
%************************************************************************
%************************************************************************
\begin{code}
-tcCheckRhos :: [RenamedHsExpr] -> [TcType] -> TcM [TcExpr]
+tcCheckRhos :: [LHsExpr Name] -> [TcType] -> TcM [LHsExpr TcId]
tcCheckRhos [] [] = returnM []
tcCheckRhos (expr:exprs) (ty:tys)
Overloaded literals.
\begin{code}
-tcLit :: HsLit -> Expected TcRhoType -> TcM TcExpr
-tcLit (HsLitLit s _) res_ty
- = zapExpectedType res_ty `thenM` \ res_ty' ->
- tcLookupClass cCallableClassName `thenM` \ cCallableClass ->
- newDicts (LitLitOrigin (unpackFS s))
- [mkClassPred cCallableClass [res_ty']] `thenM` \ dicts ->
- extendLIEs dicts `thenM_`
- returnM (HsLit (HsLitLit s res_ty'))
-
+tcLit :: HsLit -> Expected TcRhoType -> TcM (HsExpr TcId)
tcLit lit res_ty
= zapExpectedTo res_ty (hsLitType lit) `thenM_`
returnM (HsLit lit)
caseScrutCtxt expr
= hang (ptext SLIT("In the scrutinee of a case expression:")) 4 (ppr expr)
-exprSigCtxt expr
- = hang (ptext SLIT("When checking the type signature of the expression:"))
- 4 (ppr expr)
-
exprCtxt expr
= hang (ptext SLIT("In the expression:")) 4 (ppr expr)
appCtxt fun args
= ptext SLIT("In the application") <+> quotes (ppr the_app)
where
- the_app = foldl HsApp fun args -- Used in error messages
-
-lurkingRank2Err fun fun_ty
- = hang (hsep [ptext SLIT("Illegal use of"), quotes (ppr fun)])
- 4 (vcat [ptext SLIT("It is applied to too few arguments"),
- ptext SLIT("so that the result type has for-alls in it:") <+> ppr fun_ty])
+ the_app = foldl mkHsApp fun args -- Used in error messages
badFieldsUpd rbinds
= hang (ptext SLIT("No constructor has all these fields:"))
= ptext SLIT("Fields of") <+> quotes (ppr con) <+> ptext SLIT("not initialised:")
<+> pprWithCommas ppr fields
-polySpliceErr :: Id -> SDoc
-polySpliceErr id
- = ptext SLIT("Can't splice the polymorphic local variable") <+> quotes (ppr id)
-
wrongArgsCtxt too_many_or_few fun args
= hang (ptext SLIT("Probable cause:") <+> quotes (ppr fun)
<+> ptext SLIT("is applied to") <+> text too_many_or_few
<+> ptext SLIT("arguments in the call"))
4 (parens (ppr the_app))
where
- the_app = foldl HsApp fun args -- Used in error messages
+ the_app = foldl mkHsApp fun args -- Used in error messages
+
+#ifdef GHCI
+polySpliceErr :: Id -> SDoc
+polySpliceErr id
+ = ptext SLIT("Can't splice the polymorphic local variable") <+> quotes (ppr id)
+#endif
\end{code}
projects / ghc-hetmet.git / blobdiff