X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Frename%2FRnExpr.lhs;h=8f38a092191513244f7fcea5cfcc28ff9c3de473;hb=2c128fe85dffabfbb00b3acd20d74ccd9eed79ee;hp=5102f544a1fc4de98a2653dfae7e7c8c64dbb591;hpb=2a0ffd1c424b2c076506841a55fa6f45d85329bb;p=ghc-hetmet.git diff --git a/ghc/compiler/rename/RnExpr.lhs b/ghc/compiler/rename/RnExpr.lhs index 5102f54..8f38a09 100644 --- a/ghc/compiler/rename/RnExpr.lhs +++ b/ghc/compiler/rename/RnExpr.lhs @@ -11,48 +11,42 @@ free variables. \begin{code} module RnExpr ( - rnMatch, rnGRHSs, rnPat, rnExpr, rnExprs, + rnMatch, rnGRHSs, rnPat, rnExpr, rnExprs, rnStmt, checkPrecMatch ) where #include "HsVersions.h" import {-# SOURCE #-} RnBinds ( rnBinds ) -import {-# SOURCE #-} RnSource ( rnHsSigType, rnHsType ) import HsSyn import RdrHsSyn import RnHsSyn import RnMonad import RnEnv -import RnIfaces ( lookupFixityRn ) -import CmdLineOpts ( opt_GlasgowExts, opt_IgnoreAsserts ) -import BasicTypes ( Fixity(..), FixityDirection(..), defaultFixity, negateFixity, negatePrecedence ) -import PrelInfo ( numClass_RDR, fractionalClass_RDR, eqClass_RDR, - ccallableClass_RDR, creturnableClass_RDR, +import RnTypes ( rnHsTypeFVs ) +import RnHiFiles ( lookupFixityRn ) +import CmdLineOpts ( DynFlag(..), opt_IgnoreAsserts ) +import Literal ( inIntRange, inCharRange ) +import BasicTypes ( Fixity(..), FixityDirection(..), defaultFixity, negateFixity ) +import PrelNames ( hasKey, assertIdKey, + eqClass_RDR, foldr_RDR, build_RDR, eqString_RDR, + cCallableClass_RDR, cReturnableClass_RDR, monadClass_RDR, enumClass_RDR, ordClass_RDR, - ratioDataCon_RDR, negate_RDR, assertErr_RDR, - ioDataCon_RDR, addr2Integer_RDR, - foldr_RDR, build_RDR + ratioDataCon_RDR, assertErr_RDR, + ioDataCon_RDR, plusInteger_RDR, timesInteger_RDR, ) import TysPrim ( charPrimTyCon, addrPrimTyCon, intPrimTyCon, floatPrimTyCon, doublePrimTyCon ) -import Name ( nameUnique, isLocallyDefined, NamedThing(..) - , mkSysLocalName, nameSrcLoc - ) +import TysWiredIn ( intTyCon ) +import Name ( NamedThing(..), mkSysLocalName, nameSrcLoc ) import NameSet import UniqFM ( isNullUFM ) -import FiniteMap ( elemFM ) -import UniqSet ( emptyUniqSet, UniqSet ) -import Unique ( hasKey, assertIdKey ) -import Util ( removeDups ) -import ListSetOps ( unionLists ) -import Maybes ( maybeToBool ) +import UniqSet ( emptyUniqSet ) +import List ( intersectBy ) +import ListSetOps ( removeDups ) import Outputable -import Literal ( inIntRange, tARGET_MAX_INT ) -import RdrName ( mkSrcUnqual ) -import OccName ( varName ) \end{code} @@ -72,21 +66,37 @@ rnPat (VarPatIn name) returnRn (VarPatIn vname, emptyFVs) rnPat (SigPatIn pat ty) - | opt_GlasgowExts - = rnPat pat `thenRn` \ (pat', fvs1) -> - rnHsType doc ty `thenRn` \ (ty', fvs2) -> - returnRn (SigPatIn pat' ty', fvs1 `plusFV` fvs2) - - | otherwise - = addErrRn (patSigErr ty) `thenRn_` - rnPat pat + = doptRn Opt_GlasgowExts `thenRn` \ glaExts -> + + if glaExts + then rnPat pat `thenRn` \ (pat', fvs1) -> + rnHsTypeFVs doc ty `thenRn` \ (ty', fvs2) -> + returnRn (SigPatIn pat' ty', fvs1 `plusFV` fvs2) + + else addErrRn (patSigErr ty) `thenRn_` + rnPat pat where doc = text "a pattern type-signature" +rnPat (LitPatIn s@(HsString _)) + = lookupOrigName eqString_RDR `thenRn` \ eq -> + returnRn (LitPatIn s, unitFV eq) + rnPat (LitPatIn lit) - = litOccurrence lit `thenRn` \ fvs1 -> - lookupImplicitOccRn eqClass_RDR `thenRn` \ eq -> -- Needed to find equality on pattern - returnRn (LitPatIn lit, fvs1 `addOneFV` eq) + = litFVs lit `thenRn` \ fvs -> + returnRn (LitPatIn lit, fvs) + +rnPat (NPatIn lit) + = rnOverLit lit `thenRn` \ (lit', fvs1) -> + lookupOrigName eqClass_RDR `thenRn` \ eq -> -- Needed to find equality on pattern + returnRn (NPatIn lit', fvs1 `addOneFV` eq) + +rnPat (NPlusKPatIn name lit minus) + = rnOverLit lit `thenRn` \ (lit', fvs) -> + lookupOrigName ordClass_RDR `thenRn` \ ord -> + lookupBndrRn name `thenRn` \ name' -> + lookupSyntaxName minus `thenRn` \ minus' -> + returnRn (NPlusKPatIn name' lit' minus', fvs `addOneFV` ord `addOneFV` minus') rnPat (LazyPatIn pat) = rnPat pat `thenRn` \ (pat', fvs) -> @@ -109,40 +119,17 @@ rnPat (ConOpPatIn pat1 con _ pat2) getModeRn `thenRn` \ mode -> -- See comments with rnExpr (OpApp ...) - (case mode of - InterfaceMode -> returnRn (ConOpPatIn pat1' con' defaultFixity pat2') - SourceMode -> lookupFixityRn con' `thenRn` \ fixity -> - mkConOpPatRn pat1' con' fixity pat2' + (if isInterfaceMode mode + then returnRn (ConOpPatIn pat1' con' defaultFixity pat2') + else lookupFixityRn con' `thenRn` \ fixity -> + mkConOpPatRn pat1' con' fixity pat2' ) `thenRn` \ pat' -> returnRn (pat', fvs1 `plusFV` fvs2 `addOneFV` con') --- Negated patters can only be literals, and they are dealt with --- by negating the literal at compile time, not by using the negation --- operation in Num. So we don't need to make an implicit reference --- to negate_RDR. -rnPat neg@(NegPatIn pat) - = checkRn (valid_neg_pat pat) (negPatErr neg) - `thenRn_` - rnPat pat `thenRn` \ (pat', fvs) -> - returnRn (NegPatIn pat', fvs) - where - valid_neg_pat (LitPatIn (HsInt _)) = True - valid_neg_pat (LitPatIn (HsIntPrim _)) = True - valid_neg_pat (LitPatIn (HsFrac _)) = True - valid_neg_pat (LitPatIn (HsFloatPrim _)) = True - valid_neg_pat (LitPatIn (HsDoublePrim _)) = True - valid_neg_pat _ = False - rnPat (ParPatIn pat) = rnPat pat `thenRn` \ (pat', fvs) -> returnRn (ParPatIn pat', fvs) -rnPat (NPlusKPatIn name lit) - = litOccurrence lit `thenRn` \ fvs -> - lookupImplicitOccRn ordClass_RDR `thenRn` \ ord -> - lookupBndrRn name `thenRn` \ name' -> - returnRn (NPlusKPatIn name' lit, fvs `addOneFV` ord) - rnPat (ListPatIn pats) = mapFvRn rnPat pats `thenRn` \ (patslist, fvs) -> returnRn (ListPatIn patslist, fvs `addOneFV` listTyCon_name) @@ -157,6 +144,10 @@ rnPat (RecPatIn con rpats) = lookupOccRn con `thenRn` \ con' -> rnRpats rpats `thenRn` \ (rpats', fvs) -> returnRn (RecPatIn con' rpats', fvs `addOneFV` con') + +rnPat (TypePatIn name) = + rnHsTypeFVs (text "type pattern") name `thenRn` \ (name', fvs) -> + returnRn (TypePatIn name', fvs) \end{code} ************************************************************************ @@ -166,36 +157,33 @@ rnPat (RecPatIn con rpats) ************************************************************************ \begin{code} -rnMatch :: RdrNameMatch -> RnMS (RenamedMatch, FreeVars) +rnMatch :: HsMatchContext RdrName -> RdrNameMatch -> RnMS (RenamedMatch, FreeVars) -rnMatch match@(Match _ pats maybe_rhs_sig grhss) +rnMatch ctxt match@(Match _ pats maybe_rhs_sig grhss) = pushSrcLocRn (getMatchLoc match) $ - -- Find the universally quantified type variables - -- in the pattern type signatures - getLocalNameEnv `thenRn` \ name_env -> + -- Bind pattern-bound type variables let - tyvars_in_sigs = rhs_sig_tyvars `unionLists` tyvars_in_pats - rhs_sig_tyvars = case maybe_rhs_sig of + rhs_sig_tys = case maybe_rhs_sig of Nothing -> [] - Just ty -> extractHsTyRdrTyVars ty - tyvars_in_pats = extractPatsTyVars pats - forall_tyvars = filter (not . (`elemFM` name_env)) tyvars_in_sigs - doc_sig = text "a pattern type-signature" - doc_pats = text "in a pattern match" + Just ty -> [ty] + pat_sig_tys = collectSigTysFromPats pats + doc_sig = text "In a result type-signature" + doc_pat = pprMatchContext ctxt in - bindTyVarsFVRn doc_sig (map UserTyVar forall_tyvars) $ \ sig_tyvars -> + bindPatSigTyVars (rhs_sig_tys ++ pat_sig_tys) $ \ sig_tyvars -> -- Note that we do a single bindLocalsRn for all the -- matches together, so that we spot the repeated variable in -- f x x = 1 - bindLocalsFVRn doc_pats (collectPatsBinders pats) $ \ new_binders -> + bindLocalsFVRn doc_pat (collectPatsBinders pats) $ \ new_binders -> mapFvRn rnPat pats `thenRn` \ (pats', pat_fvs) -> rnGRHSs grhss `thenRn` \ (grhss', grhss_fvs) -> + doptRn Opt_GlasgowExts `thenRn` \ opt_GlasgowExts -> (case maybe_rhs_sig of Nothing -> returnRn (Nothing, emptyFVs) - Just ty | opt_GlasgowExts -> rnHsType doc_sig ty `thenRn` \ (ty', ty_fvs) -> + Just ty | opt_GlasgowExts -> rnHsTypeFVs doc_sig ty `thenRn` \ (ty', ty_fvs) -> returnRn (Just ty', ty_fvs) | otherwise -> addErrRn (patSigErr ty) `thenRn_` returnRn (Nothing, emptyFVs) @@ -212,6 +200,7 @@ rnMatch match@(Match _ pats maybe_rhs_sig grhss) -- The bindLocals and bindTyVars will remove the bound FVs \end{code} + %************************************************************************ %* * \subsubsection{Guarded right-hand sides (GRHSs)} @@ -221,29 +210,29 @@ rnMatch match@(Match _ pats maybe_rhs_sig grhss) \begin{code} rnGRHSs :: RdrNameGRHSs -> RnMS (RenamedGRHSs, FreeVars) -rnGRHSs (GRHSs grhss binds maybe_ty) - = ASSERT( not (maybeToBool maybe_ty) ) - rnBinds binds $ \ binds' -> +rnGRHSs (GRHSs grhss binds _) + = rnBinds binds $ \ binds' -> mapFvRn rnGRHS grhss `thenRn` \ (grhss', fvGRHSs) -> - returnRn (GRHSs grhss' binds' Nothing, fvGRHSs) + returnRn (GRHSs grhss' binds' placeHolderType, fvGRHSs) rnGRHS (GRHS guarded locn) - = pushSrcLocRn locn $ + = doptRn Opt_GlasgowExts `thenRn` \ opt_GlasgowExts -> + pushSrcLocRn locn $ (if not (opt_GlasgowExts || is_standard_guard guarded) then addWarnRn (nonStdGuardErr guarded) else returnRn () ) `thenRn_` - rnStmts rnExpr guarded `thenRn` \ (guarded', fvs) -> + rnStmts guarded `thenRn` \ ((_, guarded'), fvs) -> returnRn (GRHS guarded' locn, fvs) where -- Standard Haskell 1.4 guards are just a single boolean -- expression, rather than a list of qualifiers as in the -- Glasgow extension - is_standard_guard [ExprStmt _ _] = True - is_standard_guard [GuardStmt _ _, ExprStmt _ _] = True - is_standard_guard other = False + is_standard_guard [ResultStmt _ _] = True + is_standard_guard [ExprStmt _ _ _, ResultStmt _ _] = True + is_standard_guard other = False \end{code} %************************************************************************ @@ -288,21 +277,19 @@ rnExpr (HsVar v) returnRn (HsVar name, unitFV name) rnExpr (HsIPVar v) - = getIPName v `thenRn` \ name -> + = newIPName v `thenRn` \ name -> returnRn (HsIPVar name, emptyFVs) --- Special case for integral literals with a large magnitude: --- They are transformed into an expression involving only smaller --- integral literals. This improves constant folding. -rnExpr (HsLit (HsInt i)) - | not (inIntRange i) = rnExpr (horner tARGET_MAX_INT i) - rnExpr (HsLit lit) - = litOccurrence lit `thenRn` \ fvs -> + = litFVs lit `thenRn` \ fvs -> returnRn (HsLit lit, fvs) +rnExpr (HsOverLit lit) + = rnOverLit lit `thenRn` \ (lit', fvs) -> + returnRn (HsOverLit lit', fvs) + rnExpr (HsLam match) - = rnMatch match `thenRn` \ (match', fvMatch) -> + = rnMatch LambdaExpr match `thenRn` \ (match', fvMatch) -> returnRn (HsLam match', fvMatch) rnExpr (HsApp fun arg) @@ -321,26 +308,20 @@ rnExpr (OpApp e1 op _ e2) -- that the deriving code generator got the association correct -- Don't even look up the fixity when in interface mode getModeRn `thenRn` \ mode -> - (case mode of - SourceMode -> lookupFixityRn op_name `thenRn` \ fixity -> - mkOpAppRn e1' op' fixity e2' - InterfaceMode -> returnRn (OpApp e1' op' defaultFixity e2') + (if isInterfaceMode mode + then returnRn (OpApp e1' op' defaultFixity e2') + else lookupFixityRn op_name `thenRn` \ fixity -> + mkOpAppRn e1' op' fixity e2' ) `thenRn` \ final_e -> returnRn (final_e, fv_e1 `plusFV` fv_op `plusFV` fv_e2) --- constant-fold some negate applications on unboxed literals. Since --- negate is a polymorphic function, we have to do these here. -rnExpr (NegApp (HsLit (HsIntPrim i)) _) = rnExpr (HsLit (HsIntPrim (-i))) -rnExpr (NegApp (HsLit (HsFloatPrim i)) _) = rnExpr (HsLit (HsFloatPrim (-i))) -rnExpr (NegApp (HsLit (HsDoublePrim i)) _) = rnExpr (HsLit (HsDoublePrim (-i))) - -rnExpr (NegApp e n) - = rnExpr e `thenRn` \ (e', fv_e) -> - lookupImplicitOccRn negate_RDR `thenRn` \ neg -> - mkNegAppRn e' (HsVar neg) `thenRn` \ final_e -> - returnRn (final_e, fv_e `addOneFV` neg) +rnExpr (NegApp e neg_name) + = rnExpr e `thenRn` \ (e', fv_e) -> + lookupSyntaxName neg_name `thenRn` \ neg_name' -> + mkNegAppRn e' neg_name' `thenRn` \ final_e -> + returnRn (final_e, fv_e `addOneFV` neg_name') rnExpr (HsPar e) = rnExpr e `thenRn` \ (e', fvs_e) -> @@ -358,13 +339,13 @@ rnExpr section@(SectionR op expr) checkSectionPrec "right" section op' expr' `thenRn_` returnRn (SectionR op' expr', fvs_op `plusFV` fvs_expr) -rnExpr (HsCCall fun args may_gc is_casm fake_result_ty) +rnExpr (HsCCall fun args may_gc is_casm _) -- Check out the comment on RnIfaces.getNonWiredDataDecl about ccalls - = lookupImplicitOccsRn [ccallableClass_RDR, - creturnableClass_RDR, + = lookupOrigNames [cCallableClass_RDR, + cReturnableClass_RDR, ioDataCon_RDR] `thenRn` \ implicit_fvs -> rnExprs args `thenRn` \ (args', fvs_args) -> - returnRn (HsCCall fun args' may_gc is_casm fake_result_ty, + returnRn (HsCCall fun args' may_gc is_casm placeHolderType, fvs_args `plusFV` implicit_fvs) rnExpr (HsSCC lbl expr) @@ -373,8 +354,8 @@ rnExpr (HsSCC lbl expr) rnExpr (HsCase expr ms src_loc) = pushSrcLocRn src_loc $ - rnExpr expr `thenRn` \ (new_expr, e_fvs) -> - mapFvRn rnMatch ms `thenRn` \ (new_ms, ms_fvs) -> + rnExpr expr `thenRn` \ (new_expr, e_fvs) -> + mapFvRn (rnMatch CaseAlt) ms `thenRn` \ (new_ms, ms_fvs) -> returnRn (HsCase new_expr new_ms src_loc, e_fvs `plusFV` ms_fvs) rnExpr (HsLet binds expr) @@ -389,14 +370,13 @@ rnExpr (HsWith expr binds) rnExpr e@(HsDo do_or_lc stmts src_loc) = pushSrcLocRn src_loc $ - lookupImplicitOccsRn implicit_rdr_names `thenRn` \ implicit_fvs -> - rnStmts rnExpr stmts `thenRn` \ (stmts', fvs) -> + lookupOrigNames implicit_rdr_names `thenRn` \ implicit_fvs -> + rnStmts stmts `thenRn` \ ((_, stmts'), fvs) -> -- check the statement list ends in an expression case last stmts' of { - ExprStmt _ _ -> returnRn () ; - ReturnStmt _ -> returnRn () ; -- for list comprehensions - _ -> addErrRn (doStmtListErr e) - } `thenRn_` + ResultStmt _ _ -> returnRn () ; + _ -> addErrRn (doStmtListErr e) + } `thenRn_` returnRn (HsDo do_or_lc stmts' src_loc, fvs `plusFV` implicit_fvs) where implicit_rdr_names = [foldr_RDR, build_RDR, monadClass_RDR] @@ -405,9 +385,9 @@ rnExpr e@(HsDo do_or_lc stmts src_loc) -- Oh well. -rnExpr (ExplicitList exps) +rnExpr (ExplicitList _ exps) = rnExprs exps `thenRn` \ (exps', fvs) -> - returnRn (ExplicitList exps', fvs `addOneFV` listTyCon_name) + returnRn (ExplicitList placeHolderType exps', fvs `addOneFV` listTyCon_name) rnExpr (ExplicitTuple exps boxity) = rnExprs exps `thenRn` \ (exps', fvs) -> @@ -426,8 +406,8 @@ rnExpr (RecordUpd expr rbinds) returnRn (RecordUpd expr' rbinds', fvExpr `plusFV` fvRbinds) rnExpr (ExprWithTySig expr pty) - = rnExpr expr `thenRn` \ (expr', fvExpr) -> - rnHsSigType (text "an expression") pty `thenRn` \ (pty', fvTy) -> + = rnExpr expr `thenRn` \ (expr', fvExpr) -> + rnHsTypeFVs (text "an expression type signature") pty `thenRn` \ (pty', fvTy) -> returnRn (ExprWithTySig expr' pty', fvExpr `plusFV` fvTy) rnExpr (HsIf p b1 b2 src_loc) @@ -437,8 +417,14 @@ rnExpr (HsIf p b1 b2 src_loc) rnExpr b2 `thenRn` \ (b2', fvB2) -> returnRn (HsIf p' b1' b2' src_loc, plusFVs [fvP, fvB1, fvB2]) +rnExpr (HsType a) + = rnHsTypeFVs doc a `thenRn` \ (t, fvT) -> + returnRn (HsType t, fvT) + where + doc = text "renaming a type pattern" + rnExpr (ArithSeqIn seq) - = lookupImplicitOccRn enumClass_RDR `thenRn` \ enum -> + = lookupOrigName enumClass_RDR `thenRn` \ enum -> rn_seq seq `thenRn` \ (new_seq, fvs) -> returnRn (ArithSeqIn new_seq, fvs `addOneFV` enum) where @@ -477,19 +463,10 @@ rnExpr e@(EAsPat _ _) = addErrRn (patSynErr e) `thenRn_` rnExpr e@(ELazyPat _) = addErrRn (patSynErr e) `thenRn_` returnRn (EWildPat, emptyFVs) - --- Transform i into (x1 + (x2 + (x3 + (...) * b) * b) * b) with abs xi <= b -horner :: Integer -> Integer -> RdrNameHsExpr -horner b i | abs q <= 1 = if r == 0 || r == i then mkInt i else mkInt r `plus` mkInt (i-r) - | r == 0 = horner b q `times` mkInt b - | otherwise = mkInt r `plus` (horner b q `times` mkInt b) - where (q,r) = i `quotRem` b - mkInt i = HsLit (HsInt i) - plus = mkOp "+" - times = mkOp "*" - mkOp op = \x y -> OpApp x (HsVar (mkSrcUnqual varName (_PK_ op))) (panic "fixity") y \end{code} + + %************************************************************************ %* * \subsubsection{@Rbinds@s and @Rpats@s: in record expressions} @@ -535,7 +512,7 @@ rnRpats rpats \begin{code} rnIPBinds [] = returnRn ([], emptyFVs) rnIPBinds ((n, expr) : binds) - = getIPName n `thenRn` \ name -> + = newIPName n `thenRn` \ name -> rnExpr expr `thenRn` \ (expr',fvExpr) -> rnIPBinds binds `thenRn` \ (binds',fvBinds) -> returnRn ((name, expr') : binds', fvExpr `plusFV` fvBinds) @@ -557,56 +534,69 @@ be @{r}@, and the free var set for the entire Quals will be @{r}@. This Quals. \begin{code} -type RnExprTy = RdrNameHsExpr -> RnMS (RenamedHsExpr, FreeVars) +rnStmts :: [RdrNameStmt] + -> RnMS (([Name], [RenamedStmt]), FreeVars) -rnStmts :: RnExprTy - -> [RdrNameStmt] - -> RnMS ([RenamedStmt], FreeVars) +rnStmts [] + = returnRn (([], []), emptyFVs) -rnStmts rn_expr [] - = returnRn ([], emptyFVs) +rnStmts (stmt:stmts) + = getLocalNameEnv `thenRn` \ name_env -> + rnStmt stmt $ \ stmt' -> + rnStmts stmts `thenRn` \ ((binders, stmts'), fvs) -> + returnRn ((binders, stmt' : stmts'), fvs) -rnStmts rn_expr (stmt:stmts) - = rnStmt rn_expr stmt $ \ stmt' -> - rnStmts rn_expr stmts `thenRn` \ (stmts', fvs) -> - returnRn (stmt' : stmts', fvs) +rnStmt :: RdrNameStmt + -> (RenamedStmt -> RnMS (([Name], a), FreeVars)) + -> RnMS (([Name], a), FreeVars) +-- The thing list of names returned is the list returned by the +-- thing_inside, plus the binders of the arguments stmt -rnStmt :: RnExprTy -> RdrNameStmt - -> (RenamedStmt -> RnMS (a, FreeVars)) - -> RnMS (a, FreeVars) -- Because of mutual recursion we have to pass in rnExpr. -rnStmt rn_expr (BindStmt pat expr src_loc) thing_inside +rnStmt (ParStmt stmtss) thing_inside + = mapFvRn rnStmts stmtss `thenRn` \ (bndrstmtss, fv_stmtss) -> + let binderss = map fst bndrstmtss + checkBndrs all_bndrs bndrs + = checkRn (null (intersectBy eqOcc all_bndrs bndrs)) err `thenRn_` + returnRn (bndrs ++ all_bndrs) + eqOcc n1 n2 = nameOccName n1 == nameOccName n2 + err = text "duplicate binding in parallel list comprehension" + in + foldlRn checkBndrs [] binderss `thenRn` \ new_binders -> + bindLocalNamesFV new_binders $ + thing_inside (ParStmtOut bndrstmtss)`thenRn` \ ((rest_bndrs, result), fv_rest) -> + returnRn ((new_binders ++ rest_bndrs, result), fv_stmtss `plusFV` fv_rest) + +rnStmt (BindStmt pat expr src_loc) thing_inside = pushSrcLocRn src_loc $ - rn_expr expr `thenRn` \ (expr', fv_expr) -> - bindLocalsFVRn doc binders $ \ new_binders -> - rnPat pat `thenRn` \ (pat', fv_pat) -> - thing_inside (BindStmt pat' expr' src_loc) `thenRn` \ (result, fvs) -> - returnRn (result, fv_expr `plusFV` fvs `plusFV` fv_pat) + rnExpr expr `thenRn` \ (expr', fv_expr) -> + bindPatSigTyVars (collectSigTysFromPat pat) $ \ sig_tyvars -> + bindLocalsFVRn doc (collectPatBinders pat) $ \ new_binders -> + rnPat pat `thenRn` \ (pat', fv_pat) -> + thing_inside (BindStmt pat' expr' src_loc) `thenRn` \ ((rest_binders, result), fvs) -> + returnRn ((new_binders ++ rest_binders, result), + fv_expr `plusFV` fvs `plusFV` fv_pat) where - binders = collectPatBinders pat - doc = text "a pattern in do binding" + doc = text "In a pattern in 'do' binding" -rnStmt rn_expr (ExprStmt expr src_loc) thing_inside +rnStmt (ExprStmt expr _ src_loc) thing_inside = pushSrcLocRn src_loc $ - rn_expr expr `thenRn` \ (expr', fv_expr) -> - thing_inside (ExprStmt expr' src_loc) `thenRn` \ (result, fvs) -> + rnExpr expr `thenRn` \ (expr', fv_expr) -> + thing_inside (ExprStmt expr' placeHolderType src_loc) `thenRn` \ (result, fvs) -> returnRn (result, fv_expr `plusFV` fvs) -rnStmt rn_expr (GuardStmt expr src_loc) thing_inside +rnStmt (ResultStmt expr src_loc) thing_inside = pushSrcLocRn src_loc $ - rn_expr expr `thenRn` \ (expr', fv_expr) -> - thing_inside (GuardStmt expr' src_loc) `thenRn` \ (result, fvs) -> - returnRn (result, fv_expr `plusFV` fvs) - -rnStmt rn_expr (ReturnStmt expr) thing_inside - = rn_expr expr `thenRn` \ (expr', fv_expr) -> - thing_inside (ReturnStmt expr') `thenRn` \ (result, fvs) -> + rnExpr expr `thenRn` \ (expr', fv_expr) -> + thing_inside (ResultStmt expr' src_loc) `thenRn` \ (result, fvs) -> returnRn (result, fv_expr `plusFV` fvs) -rnStmt rn_expr (LetStmt binds) thing_inside - = rnBinds binds $ \ binds' -> - thing_inside (LetStmt binds') +rnStmt (LetStmt binds) thing_inside + = rnBinds binds $ \ binds' -> + let new_binders = collectHsBinders binds' in + thing_inside (LetStmt binds') `thenRn` \ ((rest_binders, result), fvs) -> + returnRn ((new_binders ++ rest_binders, result), fvs ) \end{code} %************************************************************************ @@ -647,21 +637,21 @@ mkOpAppRn e1@(OpApp e11 op1 fix1 e12) op2 fix2 e2 --------------------------- -- (- neg_arg) `op` e2 -mkOpAppRn e1@(NegApp neg_arg neg_op) op2 fix2 e2 +mkOpAppRn e1@(NegApp neg_arg neg_name) op2 fix2 e2 | nofix_error = addErrRn (precParseErr (pp_prefix_minus,negateFixity) (ppr_op op2,fix2)) `thenRn_` returnRn (OpApp e1 op2 fix2 e2) | associate_right = mkOpAppRn neg_arg op2 fix2 e2 `thenRn` \ new_e -> - returnRn (NegApp new_e neg_op) + returnRn (NegApp new_e neg_name) where (nofix_error, associate_right) = compareFixity negateFixity fix2 --------------------------- -- e1 `op` - neg_arg -mkOpAppRn e1 op1 fix1 e2@(NegApp neg_arg neg_op) -- NegApp can occur on the right - | not associate_right -- We *want* right association +mkOpAppRn e1 op1 fix1 e2@(NegApp neg_arg _) -- NegApp can occur on the right + | not associate_right -- We *want* right association = addErrRn (precParseErr (ppr_op op1, fix1) (pp_prefix_minus, negateFixity)) `thenRn_` returnRn (OpApp e1 op1 fix1 e2) where @@ -686,13 +676,13 @@ right_op_ok fix1 other = True -- Parser initially makes negation bind more tightly than any other operator -mkNegAppRn neg_arg neg_op +mkNegAppRn neg_arg neg_name = #ifdef DEBUG getModeRn `thenRn` \ mode -> ASSERT( not_op_app mode neg_arg ) #endif - returnRn (NegApp neg_arg neg_op) + returnRn (NegApp neg_arg neg_name) not_op_app SourceMode (OpApp _ _ _ _) = False not_op_app mode other = True @@ -715,14 +705,6 @@ mkConOpPatRn p1@(ConOpPatIn p11 op1 fix1 p12) where (nofix_error, associate_right) = compareFixity fix1 fix2 -mkConOpPatRn p1@(NegPatIn neg_arg) - op2 - fix2@(Fixity prec2 dir2) - p2 - | prec2 > negatePrecedence -- Precedence of unary - is wired in - = addErrRn (precParseNegPatErr (ppr_op op2,fix2)) `thenRn_` - returnRn (ConOpPatIn p1 op2 fix2 p2) - mkConOpPatRn p1 op fix p2 -- Default case, no rearrangment = ASSERT( not_op_pat p2 ) returnRn (ConOpPatIn p1 op fix p2) @@ -741,10 +723,10 @@ checkPrecMatch True op (Match _ (p1:p2:_) _ _) -- True indicates an infix lhs = getModeRn `thenRn` \ mode -> -- See comments with rnExpr (OpApp ...) - case mode of - InterfaceMode -> returnRn () - SourceMode -> checkPrec op p1 False `thenRn_` - checkPrec op p2 True + if isInterfaceMode mode + then returnRn () + else checkPrec op p1 False `thenRn_` + checkPrec op p2 True checkPrecMatch True op _ = panic "checkPrecMatch" @@ -763,10 +745,6 @@ checkPrec op (ConOpPatIn _ op1 _ _) right in checkRn inf_ok (precParseErr infol infor) -checkPrec op (NegPatIn _) right - = lookupFixityRn op `thenRn` \ op_fix@(Fixity op_prec op_dir) -> - checkRn (op_prec <= negatePrecedence) (precParseNegPatErr (ppr_op op,op_fix)) - checkPrec op pat right = returnRn () @@ -776,7 +754,7 @@ checkPrec op pat right checkSectionPrec left_or_right section op arg = case arg of OpApp _ op fix _ -> go_for_it (ppr_op op) fix - NegApp _ op -> go_for_it pp_prefix_minus negateFixity + NegApp _ _ -> go_for_it pp_prefix_minus negateFixity other -> returnRn () where HsVar op_name = op @@ -822,42 +800,46 @@ that the types and classes they involve are made available. \begin{code} -litOccurrence (HsChar _) - = returnRn (unitFV charTyCon_name) - -litOccurrence (HsCharPrim _) - = returnRn (unitFV (getName charPrimTyCon)) - -litOccurrence (HsString _) - = returnRn (unitFV listTyCon_name `plusFV` unitFV charTyCon_name) - -litOccurrence (HsStringPrim _) - = returnRn (unitFV (getName addrPrimTyCon)) - -litOccurrence (HsInt _) - = lookupImplicitOccsRn [numClass_RDR, addr2Integer_RDR] - -- Int and Integer are forced in by Num - -litOccurrence (HsFrac _) - = lookupImplicitOccsRn [fractionalClass_RDR,ratioDataCon_RDR,addr2Integer_RDR] +litFVs (HsChar c) + = checkRn (inCharRange c) (bogusCharError c) `thenRn_` + returnRn (unitFV charTyCon_name) + +litFVs (HsCharPrim c) = returnRn (unitFV (getName charPrimTyCon)) +litFVs (HsString s) = returnRn (mkFVs [listTyCon_name, charTyCon_name]) +litFVs (HsStringPrim s) = returnRn (unitFV (getName addrPrimTyCon)) +litFVs (HsInt i) = returnRn (unitFV (getName intTyCon)) +litFVs (HsIntPrim i) = returnRn (unitFV (getName intPrimTyCon)) +litFVs (HsFloatPrim f) = returnRn (unitFV (getName floatPrimTyCon)) +litFVs (HsDoublePrim d) = returnRn (unitFV (getName doublePrimTyCon)) +litFVs (HsLitLit l bogus_ty) = lookupOrigName cCallableClass_RDR `thenRn` \ cc -> + returnRn (unitFV cc) +litFVs lit = pprPanic "RnExpr.litFVs" (ppr lit) -- HsInteger and HsRat only appear + -- in post-typechecker translations + +rnOverLit (HsIntegral i from_integer_name) + = lookupSyntaxName from_integer_name `thenRn` \ from_integer_name' -> + if inIntRange i then + returnRn (HsIntegral i from_integer_name', unitFV from_integer_name') + else + lookupOrigNames [plusInteger_RDR, timesInteger_RDR] `thenRn` \ ns -> + -- Big integer literals are built, using + and *, + -- out of small integers (DsUtils.mkIntegerLit) + -- [NB: plusInteger, timesInteger aren't rebindable... + -- they are used to construct the argument to fromInteger, + -- which is the rebindable one.] + returnRn (HsIntegral i from_integer_name', ns `addOneFV` from_integer_name') + +rnOverLit (HsFractional i from_rat_name) + = lookupSyntaxName from_rat_name `thenRn` \ from_rat_name' -> + lookupOrigNames [ratioDataCon_RDR, plusInteger_RDR, timesInteger_RDR] `thenRn` \ ns -> -- We have to make sure that the Ratio type is imported with -- its constructor, because literals of type Ratio t are -- built with that constructor. -- The Rational type is needed too, but that will come in -- when fractionalClass does. - -litOccurrence (HsIntPrim _) - = returnRn (unitFV (getName intPrimTyCon)) - -litOccurrence (HsFloatPrim _) - = returnRn (unitFV (getName floatPrimTyCon)) - -litOccurrence (HsDoublePrim _) - = returnRn (unitFV (getName doublePrimTyCon)) - -litOccurrence (HsLitLit _) - = lookupImplicitOccRn ccallableClass_RDR `thenRn` \ cc -> - returnRn (unitFV cc) + -- The plus/times integer operations may be needed to construct the numerator + -- and denominator (see DsUtils.mkIntegerLit) + returnRn (HsFractional i from_rat_name', ns `addOneFV` from_rat_name') \end{code} %************************************************************************ @@ -869,8 +851,8 @@ litOccurrence (HsLitLit _) \begin{code} mkAssertExpr :: RnMS (RenamedHsExpr, FreeVars) mkAssertExpr = - mkImportedGlobalFromRdrName assertErr_RDR `thenRn` \ name -> - getSrcLocRn `thenRn` \ sloc -> + lookupOrigName assertErr_RDR `thenRn` \ name -> + getSrcLocRn `thenRn` \ sloc -> -- if we're ignoring asserts, return (\ _ e -> e) -- if not, return (assertError "src-loc") @@ -881,9 +863,7 @@ mkAssertExpr = vname = mkSysLocalName uniq SLIT("v") expr = HsLam ignorePredMatch loc = nameSrcLoc vname - ignorePredMatch = Match [] [WildPatIn, VarPatIn vname] Nothing - (GRHSs [GRHS [ExprStmt (HsVar vname) loc] loc] - EmptyBinds Nothing) + ignorePredMatch = mkSimpleMatch [WildPatIn, VarPatIn vname] (HsVar vname) placeHolderType loc in returnRn (expr, unitFV name) else @@ -913,16 +893,6 @@ dupFieldErr str (dup:rest) quotes (ppr dup), ptext SLIT("in record"), text str] -negPatErr pat - = sep [pp_prefix_minus <+> ptext SLIT("not applied to literal in pattern"), - quotes (ppr pat)] - -precParseNegPatErr op - = hang (ptext SLIT("precedence parsing error")) - 4 (hsep [pp_prefix_minus <+> ptext SLIT("has lower precedence than"), - ppr_opfix op, - ptext SLIT("in pattern")]) - precParseErr op1 op2 = hang (ptext SLIT("precedence parsing error")) 4 (hsep [ptext SLIT("cannot mix"), ppr_opfix op1, ptext SLIT("and"), @@ -932,7 +902,7 @@ precParseErr op1 op2 sectionPrecErr op arg_op section = vcat [ptext SLIT("The operator") <+> ppr_opfix op <+> ptext SLIT("of a section"), nest 4 (ptext SLIT("must have lower precedence than the operand") <+> ppr_opfix arg_op), - nest 4 (ptext SLIT("In the section:") <+> quotes (ppr section))] + nest 4 (ptext SLIT("in the section:") <+> quotes (ppr section))] nonStdGuardErr guard = hang (ptext @@ -950,4 +920,7 @@ patSynErr e doStmtListErr e = sep [ptext SLIT("`do' statements must end in expression:"), nest 4 (ppr e)] + +bogusCharError c + = ptext SLIT("character literal out of range: '\\") <> int c <> char '\'' \end{code}