\begin{code}
module RnExpr (
- rnMatch, rnGRHSs, rnPat, rnExpr, rnExprs,
- checkPrecMatch
+ rnMatch, rnGRHSs, rnPat, rnExpr, rnExprs,
+ rnStmt, rnStmts, checkPrecMatch
) where
#include "HsVersions.h"
-import {-# SOURCE #-} RnBinds ( rnBinds )
-import {-# SOURCE #-} RnSource ( rnHsSigType, rnHsType )
+import {-# SOURCE #-} RnSource ( rnSrcDecls, rnBinds )
import HsSyn
import RdrHsSyn
import RnHsSyn
-import RnMonad
+import TcRnMonad
import RnEnv
-import RnIfaces ( lookupFixityRn )
-import CmdLineOpts ( dopt_GlasgowExts, opt_IgnoreAsserts )
-import Literal ( inIntRange )
-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, plusInteger_RDR, timesInteger_RDR
- )
+import RnTypes ( rnHsTypeFVs, precParseErr, sectionPrecErr )
+import CmdLineOpts ( DynFlag(..), opt_IgnoreAsserts )
+import Literal ( inIntRange, inCharRange )
+import BasicTypes ( Fixity(..), FixityDirection(..), IPName(..),
+ defaultFixity, negateFixity, compareFixity )
+import PrelNames ( hasKey, assertIdKey,
+ eqClassName, foldrName, buildName, eqStringName,
+ cCallableClassName, cReturnableClassName,
+ enumClassName, ordClassName,
+ ratioDataConName, splitName, fstName, sndName,
+ ioDataConName, plusIntegerName, timesIntegerName,
+ replicatePName, mapPName, filterPName,
+ crossPName, zipPName, lengthPName, indexPName, toPName,
+ enumFromToPName, enumFromThenToPName, assertErrorName,
+ fromIntegerName, fromRationalName, minusName, negateName,
+ qTyConName, monadNames )
import TysPrim ( charPrimTyCon, addrPrimTyCon, intPrimTyCon,
- floatPrimTyCon, doublePrimTyCon
- )
-import TysWiredIn ( intTyCon, integerTyCon )
-import Name ( NamedThing(..), mkSysLocalName, nameSrcLoc )
+ floatPrimTyCon, doublePrimTyCon )
+import TysWiredIn ( intTyCon )
+import RdrName ( RdrName )
+import Name ( Name, NamedThing(..), mkSystemName, nameSrcLoc, nameOccName )
import NameSet
+import UnicodeUtil ( stringToUtf8 )
import UniqFM ( isNullUFM )
-import FiniteMap ( elemFM )
import UniqSet ( emptyUniqSet )
-import ListSetOps ( unionLists, removeDups )
-import Maybes ( maybeToBool )
+import List ( intersectBy )
+import ListSetOps ( removeDups )
import Outputable
+import FastString
\end{code}
*********************************************************
\begin{code}
-rnPat :: RdrNamePat -> RnMS (RenamedPat, FreeVars)
+rnPat :: RdrNamePat -> RnM (RenamedPat, FreeVars)
-rnPat WildPatIn = returnRn (WildPatIn, emptyFVs)
+rnPat (WildPat _) = returnM (WildPat placeHolderType, emptyFVs)
-rnPat (VarPatIn name)
- = lookupBndrRn name `thenRn` \ vname ->
- returnRn (VarPatIn vname, emptyFVs)
+rnPat (VarPat name)
+ = lookupBndrRn name `thenM` \ vname ->
+ returnM (VarPat vname, emptyFVs)
rnPat (SigPatIn pat ty)
- = doptsRn dopt_GlasgowExts `thenRn` \ opt_GlasgowExts ->
+ = doptM Opt_GlasgowExts `thenM` \ glaExts ->
- if opt_GlasgowExts
- then rnPat pat `thenRn` \ (pat', fvs1) ->
- rnHsType doc ty `thenRn` \ (ty', fvs2) ->
- returnRn (SigPatIn pat' ty', fvs1 `plusFV` fvs2)
+ if glaExts
+ then rnPat pat `thenM` \ (pat', fvs1) ->
+ rnHsTypeFVs doc ty `thenM` \ (ty', fvs2) ->
+ returnM (SigPatIn pat' ty', fvs1 `plusFV` fvs2)
- else addErrRn (patSigErr ty) `thenRn_`
+ else addErr (patSigErr ty) `thenM_`
rnPat pat
where
- doc = text "a pattern type-signature"
+ doc = text "In a pattern type-signature"
-rnPat (LitPatIn s@(HsString _))
- = lookupOrigName eqString_RDR `thenRn` \ eq ->
- returnRn (LitPatIn s, unitFV eq)
-
-rnPat (LitPatIn lit)
- = 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' ->
- lookupOccRn minus `thenRn` \ minus' ->
- returnRn (NPlusKPatIn name' lit' minus', fvs `addOneFV` ord `addOneFV` minus')
-
-rnPat (LazyPatIn pat)
- = rnPat pat `thenRn` \ (pat', fvs) ->
- returnRn (LazyPatIn pat', fvs)
-
-rnPat (AsPatIn name pat)
- = rnPat pat `thenRn` \ (pat', fvs) ->
- lookupBndrRn name `thenRn` \ vname ->
- returnRn (AsPatIn vname pat', fvs)
-
-rnPat (ConPatIn con pats)
- = lookupOccRn con `thenRn` \ con' ->
- mapFvRn rnPat pats `thenRn` \ (patslist, fvs) ->
- returnRn (ConPatIn con' patslist, fvs `addOneFV` con')
-
-rnPat (ConOpPatIn pat1 con _ pat2)
- = rnPat pat1 `thenRn` \ (pat1', fvs1) ->
- lookupOccRn con `thenRn` \ con' ->
- rnPat pat2 `thenRn` \ (pat2', fvs2) ->
-
- 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'
- ) `thenRn` \ pat' ->
- returnRn (pat', fvs1 `plusFV` fvs2 `addOneFV` con')
-
-rnPat (ParPatIn pat)
- = rnPat pat `thenRn` \ (pat', fvs) ->
- returnRn (ParPatIn pat', fvs)
-
-rnPat (ListPatIn pats)
- = mapFvRn rnPat pats `thenRn` \ (patslist, fvs) ->
- returnRn (ListPatIn patslist, fvs `addOneFV` listTyCon_name)
-
-rnPat (TuplePatIn pats boxed)
- = mapFvRn rnPat pats `thenRn` \ (patslist, fvs) ->
- returnRn (TuplePatIn patslist boxed, fvs `addOneFV` tycon_name)
+rnPat (LitPat s@(HsString _))
+ = returnM (LitPat s, unitFV eqStringName)
+
+rnPat (LitPat lit)
+ = litFVs lit `thenM` \ fvs ->
+ returnM (LitPat lit, fvs)
+
+rnPat (NPatIn lit mb_neg)
+ = rnOverLit lit `thenM` \ (lit', fvs1) ->
+ (case mb_neg of
+ Nothing -> returnM (Nothing, emptyFVs)
+ Just _ -> lookupSyntaxName negateName `thenM` \ (neg, fvs) ->
+ returnM (Just neg, fvs)
+ ) `thenM` \ (mb_neg', fvs2) ->
+ returnM (NPatIn lit' mb_neg',
+ fvs1 `plusFV` fvs2 `addOneFV` eqClassName)
+ -- Needed to find equality on pattern
+
+rnPat (NPlusKPatIn name lit _)
+ = rnOverLit lit `thenM` \ (lit', fvs1) ->
+ lookupBndrRn name `thenM` \ name' ->
+ lookupSyntaxName minusName `thenM` \ (minus, fvs2) ->
+ returnM (NPlusKPatIn name' lit' minus,
+ fvs1 `plusFV` fvs2 `addOneFV` ordClassName)
+
+rnPat (LazyPat pat)
+ = rnPat pat `thenM` \ (pat', fvs) ->
+ returnM (LazyPat pat', fvs)
+
+rnPat (AsPat name pat)
+ = rnPat pat `thenM` \ (pat', fvs) ->
+ lookupBndrRn name `thenM` \ vname ->
+ returnM (AsPat vname pat', fvs)
+
+rnPat (ConPatIn con stuff) = rnConPat con stuff
+
+
+rnPat (ParPat pat)
+ = rnPat pat `thenM` \ (pat', fvs) ->
+ returnM (ParPat pat', fvs)
+
+rnPat (ListPat pats _)
+ = mapFvRn rnPat pats `thenM` \ (patslist, fvs) ->
+ returnM (ListPat patslist placeHolderType, fvs `addOneFV` listTyCon_name)
+
+rnPat (PArrPat pats _)
+ = mapFvRn rnPat pats `thenM` \ (patslist, fvs) ->
+ returnM (PArrPat patslist placeHolderType,
+ fvs `plusFV` implicit_fvs `addOneFV` parrTyCon_name)
+ where
+ implicit_fvs = mkFVs [lengthPName, indexPName]
+
+rnPat (TuplePat pats boxed)
+ = mapFvRn rnPat pats `thenM` \ (patslist, fvs) ->
+ returnM (TuplePat patslist boxed, fvs `addOneFV` tycon_name)
where
tycon_name = tupleTyCon_name boxed (length pats)
-rnPat (RecPatIn con rpats)
- = lookupOccRn con `thenRn` \ con' ->
- rnRpats rpats `thenRn` \ (rpats', fvs) ->
- returnRn (RecPatIn con' rpats', fvs `addOneFV` con')
-rnPat (TypePatIn name) =
- (rnHsType (text "type pattern") name) `thenRn` \ (name', fvs) ->
- returnRn (TypePatIn name', fvs)
+rnPat (TypePat name) =
+ rnHsTypeFVs (text "In a type pattern") name `thenM` \ (name', fvs) ->
+ returnM (TypePat name', fvs)
+
+------------------------------
+rnConPat con (PrefixCon pats)
+ = lookupOccRn con `thenM` \ con' ->
+ mapFvRn rnPat pats `thenM` \ (pats', fvs) ->
+ returnM (ConPatIn con' (PrefixCon pats'), fvs `addOneFV` con')
+
+rnConPat con (RecCon rpats)
+ = lookupOccRn con `thenM` \ con' ->
+ rnRpats rpats `thenM` \ (rpats', fvs) ->
+ returnM (ConPatIn con' (RecCon rpats'), fvs `addOneFV` con')
+
+rnConPat con (InfixCon pat1 pat2)
+ = lookupOccRn con `thenM` \ con' ->
+ rnPat pat1 `thenM` \ (pat1', fvs1) ->
+ rnPat pat2 `thenM` \ (pat2', fvs2) ->
+
+ getModeRn `thenM` \ mode ->
+ -- See comments with rnExpr (OpApp ...)
+ (if isInterfaceMode mode
+ then returnM (ConPatIn con' (InfixCon pat1' pat2'))
+ else lookupFixityRn con' `thenM` \ fixity ->
+ mkConOpPatRn con' fixity pat1' pat2'
+ ) `thenM` \ pat' ->
+ returnM (pat', fvs1 `plusFV` fvs2 `addOneFV` con')
\end{code}
+
************************************************************************
* *
\subsection{Match}
************************************************************************
\begin{code}
-rnMatch :: RdrNameMatch -> RnMS (RenamedMatch, FreeVars)
+rnMatch :: HsMatchContext RdrName -> RdrNameMatch -> RnM (RenamedMatch, FreeVars)
-rnMatch match@(Match _ pats maybe_rhs_sig grhss)
- = pushSrcLocRn (getMatchLoc match) $
+rnMatch ctxt match@(Match pats maybe_rhs_sig grhss)
+ = addSrcLoc (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
- bindNakedTyVarsFVRn doc_sig forall_tyvars $ \ sig_tyvars ->
+ bindPatSigTyVars (rhs_sig_tys ++ pat_sig_tys) $
-- 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) ->
- doptsRn dopt_GlasgowExts `thenRn` \ opt_GlasgowExts ->
+ mapFvRn rnPat pats `thenM` \ (pats', pat_fvs) ->
+ rnGRHSs grhss `thenM` \ (grhss', grhss_fvs) ->
+ doptM Opt_GlasgowExts `thenM` \ opt_GlasgowExts ->
(case maybe_rhs_sig of
- Nothing -> returnRn (Nothing, emptyFVs)
- Just ty | opt_GlasgowExts -> rnHsType doc_sig ty `thenRn` \ (ty', ty_fvs) ->
- returnRn (Just ty', ty_fvs)
- | otherwise -> addErrRn (patSigErr ty) `thenRn_`
- returnRn (Nothing, emptyFVs)
- ) `thenRn` \ (maybe_rhs_sig', ty_fvs) ->
+ Nothing -> returnM (Nothing, emptyFVs)
+ Just ty | opt_GlasgowExts -> rnHsTypeFVs doc_sig ty `thenM` \ (ty', ty_fvs) ->
+ returnM (Just ty', ty_fvs)
+ | otherwise -> addErr (patSigErr ty) `thenM_`
+ returnM (Nothing, emptyFVs)
+ ) `thenM` \ (maybe_rhs_sig', ty_fvs) ->
let
binder_set = mkNameSet new_binders
unused_binders = nameSetToList (binder_set `minusNameSet` grhss_fvs)
all_fvs = grhss_fvs `plusFV` pat_fvs `plusFV` ty_fvs
in
- warnUnusedMatches unused_binders `thenRn_`
+ warnUnusedMatches unused_binders `thenM_`
- returnRn (Match sig_tyvars pats' maybe_rhs_sig' grhss', all_fvs)
+ returnM (Match pats' maybe_rhs_sig' grhss', all_fvs)
-- The bindLocals and bindTyVars will remove the bound FVs
\end{code}
+
%************************************************************************
%* *
\subsubsection{Guarded right-hand sides (GRHSs)}
%************************************************************************
\begin{code}
-rnGRHSs :: RdrNameGRHSs -> RnMS (RenamedGRHSs, FreeVars)
+rnGRHSs :: RdrNameGRHSs -> RnM (RenamedGRHSs, FreeVars)
-rnGRHSs (GRHSs grhss binds maybe_ty)
- = ASSERT( not (maybeToBool maybe_ty) )
- rnBinds binds $ \ binds' ->
- mapFvRn rnGRHS grhss `thenRn` \ (grhss', fvGRHSs) ->
- returnRn (GRHSs grhss' binds' Nothing, fvGRHSs)
+rnGRHSs (GRHSs grhss binds _)
+ = rnBinds binds $ \ binds' ->
+ mapFvRn rnGRHS grhss `thenM` \ (grhss', fvGRHSs) ->
+ returnM (GRHSs grhss' binds' placeHolderType, fvGRHSs)
rnGRHS (GRHS guarded locn)
- = doptsRn dopt_GlasgowExts `thenRn` \ opt_GlasgowExts ->
- pushSrcLocRn locn $
+ = doptM Opt_GlasgowExts `thenM` \ opt_GlasgowExts ->
+ addSrcLoc locn $
(if not (opt_GlasgowExts || is_standard_guard guarded) then
- addWarnRn (nonStdGuardErr guarded)
+ addWarn (nonStdGuardErr guarded)
else
- returnRn ()
- ) `thenRn_`
+ returnM ()
+ ) `thenM_`
- rnStmts rnExpr guarded `thenRn` \ (guarded', fvs) ->
- returnRn (GRHS guarded' locn, fvs)
+ rnStmts guarded `thenM` \ ((_, guarded'), fvs) ->
+ returnM (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}
%************************************************************************
%************************************************************************
\begin{code}
-rnExprs :: [RdrNameHsExpr] -> RnMS ([RenamedHsExpr], FreeVars)
+rnExprs :: [RdrNameHsExpr] -> RnM ([RenamedHsExpr], FreeVars)
rnExprs ls = rnExprs' ls emptyUniqSet
where
- rnExprs' [] acc = returnRn ([], acc)
+ rnExprs' [] acc = returnM ([], acc)
rnExprs' (expr:exprs) acc
- = rnExpr expr `thenRn` \ (expr', fvExpr) ->
+ = rnExpr expr `thenM` \ (expr', fvExpr) ->
-- Now we do a "seq" on the free vars because typically it's small
-- or empty, especially in very long lists of constants
let
acc' = acc `plusFV` fvExpr
in
- (grubby_seqNameSet acc' rnExprs') exprs acc' `thenRn` \ (exprs', fvExprs) ->
- returnRn (expr':exprs', fvExprs)
+ (grubby_seqNameSet acc' rnExprs') exprs acc' `thenM` \ (exprs', fvExprs) ->
+ returnM (expr':exprs', fvExprs)
-- Grubby little function to do "seq" on namesets; replace by proper seq when GHC can do seq
grubby_seqNameSet ns result | isNullUFM ns = result
Variables. We look up the variable and return the resulting name.
\begin{code}
-rnExpr :: RdrNameHsExpr -> RnMS (RenamedHsExpr, FreeVars)
+rnExpr :: RdrNameHsExpr -> RnM (RenamedHsExpr, FreeVars)
rnExpr (HsVar v)
- = lookupOccRn v `thenRn` \ name ->
- if name `hasKey` assertIdKey then
- -- We expand it to (GHCerr.assert__ location)
- mkAssertExpr
+ = lookupOccRn v `thenM` \ name ->
+ if name `hasKey` assertIdKey && not opt_IgnoreAsserts then
+ -- We expand it to (GHC.Err.assertError location_string)
+ mkAssertErrorExpr
else
- -- The normal case
- returnRn (HsVar name, unitFV name)
+ -- The normal case. Even if the Id was 'assert', if we are
+ -- ignoring assertions we leave it as GHC.Base.assert;
+ -- this function just ignores its first arg.
+ returnM (HsVar name, unitFV name)
rnExpr (HsIPVar v)
- = newIPName v `thenRn` \ name ->
- returnRn (HsIPVar name, emptyFVs)
+ = newIPName v `thenM` \ name ->
+ let
+ fvs = case name of
+ Linear _ -> mkFVs [splitName, fstName, sndName]
+ Dupable _ -> emptyFVs
+ in
+ returnM (HsIPVar name, fvs)
rnExpr (HsLit lit)
- = litFVs lit `thenRn` \ fvs ->
- returnRn (HsLit lit, fvs)
+ = litFVs lit `thenM` \ fvs ->
+ returnM (HsLit lit, fvs)
rnExpr (HsOverLit lit)
- = rnOverLit lit `thenRn` \ (lit', fvs) ->
- returnRn (HsOverLit lit', fvs)
+ = rnOverLit lit `thenM` \ (lit', fvs) ->
+ returnM (HsOverLit lit', fvs)
rnExpr (HsLam match)
- = rnMatch match `thenRn` \ (match', fvMatch) ->
- returnRn (HsLam match', fvMatch)
+ = rnMatch LambdaExpr match `thenM` \ (match', fvMatch) ->
+ returnM (HsLam match', fvMatch)
rnExpr (HsApp fun arg)
- = rnExpr fun `thenRn` \ (fun',fvFun) ->
- rnExpr arg `thenRn` \ (arg',fvArg) ->
- returnRn (HsApp fun' arg', fvFun `plusFV` fvArg)
+ = rnExpr fun `thenM` \ (fun',fvFun) ->
+ rnExpr arg `thenM` \ (arg',fvArg) ->
+ returnM (HsApp fun' arg', fvFun `plusFV` fvArg)
rnExpr (OpApp e1 op _ e2)
- = rnExpr e1 `thenRn` \ (e1', fv_e1) ->
- rnExpr e2 `thenRn` \ (e2', fv_e2) ->
- rnExpr op `thenRn` \ (op'@(HsVar op_name), fv_op) ->
+ = rnExpr e1 `thenM` \ (e1', fv_e1) ->
+ rnExpr e2 `thenM` \ (e2', fv_e2) ->
+ rnExpr op `thenM` \ (op'@(HsVar op_name), fv_op) ->
-- Deal with fixity
-- When renaming code synthesised from "deriving" declarations
-- we're in Interface mode, and we should ignore fixity; assume
-- 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')
- ) `thenRn` \ final_e ->
-
- returnRn (final_e,
+ getModeRn `thenM` \ mode ->
+ (if isInterfaceMode mode
+ then returnM (OpApp e1' op' defaultFixity e2')
+ else lookupFixityRn op_name `thenM` \ fixity ->
+ mkOpAppRn e1' op' fixity e2'
+ ) `thenM` \ final_e ->
+
+ returnM (final_e,
fv_e1 `plusFV` fv_op `plusFV` fv_e2)
-rnExpr (NegApp e n)
- = rnExpr e `thenRn` \ (e', fv_e) ->
- lookupOrigName negate_RDR `thenRn` \ neg ->
- mkNegAppRn e' neg `thenRn` \ final_e ->
- returnRn (final_e, fv_e `addOneFV` neg)
+rnExpr (NegApp e _)
+ = rnExpr e `thenM` \ (e', fv_e) ->
+ lookupSyntaxName negateName `thenM` \ (neg_name, fv_neg) ->
+ mkNegAppRn e' neg_name `thenM` \ final_e ->
+ returnM (final_e, fv_e `plusFV` fv_neg)
rnExpr (HsPar e)
- = rnExpr e `thenRn` \ (e', fvs_e) ->
- returnRn (HsPar e', fvs_e)
+ = rnExpr e `thenM` \ (e', fvs_e) ->
+ returnM (HsPar e', fvs_e)
+
+-- Template Haskell extensions
+rnExpr (HsBracket br_body)
+ = checkGHCI (thErr "bracket") `thenM_`
+ rnBracket br_body `thenM` \ (body', fvs_e) ->
+ returnM (HsBracket body', fvs_e `addOneFV` qTyConName)
+ -- We use the Q tycon as a proxy to haul in all the smart
+ -- constructors; see the hack in RnIfaces
+
+rnExpr (HsSplice n e)
+ = checkGHCI (thErr "splice") `thenM_`
+ getSrcLocM `thenM` \ loc ->
+ newLocalsRn [(n,loc)] `thenM` \ [n'] ->
+ rnExpr e `thenM` \ (e', fvs_e) ->
+ returnM (HsSplice n' e', fvs_e)
rnExpr section@(SectionL expr op)
- = rnExpr expr `thenRn` \ (expr', fvs_expr) ->
- rnExpr op `thenRn` \ (op', fvs_op) ->
- checkSectionPrec "left" section op' expr' `thenRn_`
- returnRn (SectionL expr' op', fvs_op `plusFV` fvs_expr)
+ = rnExpr expr `thenM` \ (expr', fvs_expr) ->
+ rnExpr op `thenM` \ (op', fvs_op) ->
+ checkSectionPrec InfixL section op' expr' `thenM_`
+ returnM (SectionL expr' op', fvs_op `plusFV` fvs_expr)
rnExpr section@(SectionR op expr)
- = rnExpr op `thenRn` \ (op', fvs_op) ->
- rnExpr expr `thenRn` \ (expr', fvs_expr) ->
- checkSectionPrec "right" section op' expr' `thenRn_`
- returnRn (SectionR op' expr', fvs_op `plusFV` fvs_expr)
+ = rnExpr op `thenM` \ (op', fvs_op) ->
+ rnExpr expr `thenM` \ (expr', fvs_expr) ->
+ checkSectionPrec InfixR section op' expr' `thenM_`
+ returnM (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
- = 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,
- fvs_args `plusFV` implicit_fvs)
+ = rnExprs args `thenM` \ (args', fvs_args) ->
+ returnM (HsCCall fun args' may_gc is_casm placeHolderType,
+ fvs_args `plusFV` mkFVs [cCallableClassName,
+ cReturnableClassName,
+ ioDataConName])
rnExpr (HsSCC lbl expr)
- = rnExpr expr `thenRn` \ (expr', fvs_expr) ->
- returnRn (HsSCC lbl expr', fvs_expr)
+ = rnExpr expr `thenM` \ (expr', fvs_expr) ->
+ returnM (HsSCC lbl expr', fvs_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) ->
- returnRn (HsCase new_expr new_ms src_loc, e_fvs `plusFV` ms_fvs)
+ = addSrcLoc src_loc $
+ rnExpr expr `thenM` \ (new_expr, e_fvs) ->
+ mapFvRn (rnMatch CaseAlt) ms `thenM` \ (new_ms, ms_fvs) ->
+ returnM (HsCase new_expr new_ms src_loc, e_fvs `plusFV` ms_fvs)
rnExpr (HsLet binds expr)
= rnBinds binds $ \ binds' ->
- rnExpr expr `thenRn` \ (expr',fvExpr) ->
- returnRn (HsLet binds' expr', fvExpr)
-
-rnExpr (HsWith expr binds)
- = rnExpr expr `thenRn` \ (expr',fvExpr) ->
- rnIPBinds binds `thenRn` \ (binds',fvBinds) ->
- returnRn (HsWith expr' binds', fvExpr `plusFV` fvBinds)
-
-rnExpr e@(HsDo do_or_lc stmts src_loc)
- = pushSrcLocRn src_loc $
- lookupOrigNames implicit_rdr_names `thenRn` \ implicit_fvs ->
- rnStmts rnExpr stmts `thenRn` \ (stmts', fvs) ->
- -- check the statement list ends in an expression
+ rnExpr expr `thenM` \ (expr',fvExpr) ->
+ returnM (HsLet binds' expr', fvExpr)
+
+rnExpr (HsWith expr binds is_with)
+ = warnIf is_with withWarning `thenM_`
+ rnExpr expr `thenM` \ (expr',fvExpr) ->
+ rnIPBinds binds `thenM` \ (binds',fvBinds) ->
+ returnM (HsWith expr' binds' is_with, fvExpr `plusFV` fvBinds)
+
+rnExpr e@(HsDo do_or_lc stmts _ ty src_loc)
+ = addSrcLoc src_loc $
+ rnStmts stmts `thenM` \ ((_, 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_`
- returnRn (HsDo do_or_lc stmts' src_loc, fvs `plusFV` implicit_fvs)
+ ResultStmt _ _ -> returnM () ;
+ _ -> addErr (doStmtListErr e)
+ } `thenM_`
+
+ -- Generate the rebindable syntax for the monad
+ (case do_or_lc of
+ DoExpr -> mapAndUnzipM lookupSyntaxName monadNames
+ other -> returnM ([], [])
+ ) `thenM` \ (monad_names', monad_fvs) ->
+
+ returnM (HsDo do_or_lc stmts' monad_names' placeHolderType src_loc,
+ fvs `plusFV` implicit_fvs `plusFV` plusFVs monad_fvs)
where
- implicit_rdr_names = [foldr_RDR, build_RDR, monadClass_RDR]
- -- Monad stuff should not be necessary for a list comprehension
- -- but the typechecker looks up the bind and return Ids anyway
- -- Oh well.
+ implicit_fvs = case do_or_lc of
+ PArrComp -> mkFVs [replicatePName, mapPName, filterPName,
+ crossPName, zipPName]
+ ListComp -> mkFVs [foldrName, buildName]
+ DoExpr -> emptyFVs
+rnExpr (ExplicitList _ exps)
+ = rnExprs exps `thenM` \ (exps', fvs) ->
+ returnM (ExplicitList placeHolderType exps', fvs `addOneFV` listTyCon_name)
-rnExpr (ExplicitList exps)
- = rnExprs exps `thenRn` \ (exps', fvs) ->
- returnRn (ExplicitList exps', fvs `addOneFV` listTyCon_name)
+rnExpr (ExplicitPArr _ exps)
+ = rnExprs exps `thenM` \ (exps', fvs) ->
+ returnM (ExplicitPArr placeHolderType exps',
+ fvs `addOneFV` toPName `addOneFV` parrTyCon_name)
rnExpr (ExplicitTuple exps boxity)
- = rnExprs exps `thenRn` \ (exps', fvs) ->
- returnRn (ExplicitTuple exps' boxity, fvs `addOneFV` tycon_name)
+ = rnExprs exps `thenM` \ (exps', fvs) ->
+ returnM (ExplicitTuple exps' boxity, fvs `addOneFV` tycon_name)
where
tycon_name = tupleTyCon_name boxity (length exps)
rnExpr (RecordCon con_id rbinds)
- = lookupOccRn con_id `thenRn` \ conname ->
- rnRbinds "construction" rbinds `thenRn` \ (rbinds', fvRbinds) ->
- returnRn (RecordCon conname rbinds', fvRbinds `addOneFV` conname)
+ = lookupOccRn con_id `thenM` \ conname ->
+ rnRbinds "construction" rbinds `thenM` \ (rbinds', fvRbinds) ->
+ returnM (RecordCon conname rbinds', fvRbinds `addOneFV` conname)
rnExpr (RecordUpd expr rbinds)
- = rnExpr expr `thenRn` \ (expr', fvExpr) ->
- rnRbinds "update" rbinds `thenRn` \ (rbinds', fvRbinds) ->
- returnRn (RecordUpd expr' rbinds', fvExpr `plusFV` fvRbinds)
+ = rnExpr expr `thenM` \ (expr', fvExpr) ->
+ rnRbinds "update" rbinds `thenM` \ (rbinds', fvRbinds) ->
+ returnM (RecordUpd expr' rbinds', fvExpr `plusFV` fvRbinds)
rnExpr (ExprWithTySig expr pty)
- = rnExpr expr `thenRn` \ (expr', fvExpr) ->
- rnHsSigType (text "an expression") pty `thenRn` \ (pty', fvTy) ->
- returnRn (ExprWithTySig expr' pty', fvExpr `plusFV` fvTy)
+ = rnExpr expr `thenM` \ (expr', fvExpr) ->
+ rnHsTypeFVs doc pty `thenM` \ (pty', fvTy) ->
+ returnM (ExprWithTySig expr' pty', fvExpr `plusFV` fvTy)
+ where
+ doc = text "In an expression type signature"
rnExpr (HsIf p b1 b2 src_loc)
- = pushSrcLocRn src_loc $
- rnExpr p `thenRn` \ (p', fvP) ->
- rnExpr b1 `thenRn` \ (b1', fvB1) ->
- rnExpr b2 `thenRn` \ (b2', fvB2) ->
- returnRn (HsIf p' b1' b2' src_loc, plusFVs [fvP, fvB1, fvB2])
-
-rnExpr (HsType a) =
- (rnHsType doc a) `thenRn` \ (t, fvT) -> returnRn (HsType t, fvT)
- where doc = text "renaming a type pattern"
-
+ = addSrcLoc src_loc $
+ rnExpr p `thenM` \ (p', fvP) ->
+ rnExpr b1 `thenM` \ (b1', fvB1) ->
+ rnExpr b2 `thenM` \ (b2', fvB2) ->
+ returnM (HsIf p' b1' b2' src_loc, plusFVs [fvP, fvB1, fvB2])
+
+rnExpr (HsType a)
+ = rnHsTypeFVs doc a `thenM` \ (t, fvT) ->
+ returnM (HsType t, fvT)
+ where
+ doc = text "In a type argument"
rnExpr (ArithSeqIn seq)
- = lookupOrigName enumClass_RDR `thenRn` \ enum ->
- rn_seq seq `thenRn` \ (new_seq, fvs) ->
- returnRn (ArithSeqIn new_seq, fvs `addOneFV` enum)
+ = rn_seq seq `thenM` \ (new_seq, fvs) ->
+ returnM (ArithSeqIn new_seq, fvs `addOneFV` enumClassName)
where
rn_seq (From expr)
- = rnExpr expr `thenRn` \ (expr', fvExpr) ->
- returnRn (From expr', fvExpr)
+ = rnExpr expr `thenM` \ (expr', fvExpr) ->
+ returnM (From expr', fvExpr)
rn_seq (FromThen expr1 expr2)
- = rnExpr expr1 `thenRn` \ (expr1', fvExpr1) ->
- rnExpr expr2 `thenRn` \ (expr2', fvExpr2) ->
- returnRn (FromThen expr1' expr2', fvExpr1 `plusFV` fvExpr2)
+ = rnExpr expr1 `thenM` \ (expr1', fvExpr1) ->
+ rnExpr expr2 `thenM` \ (expr2', fvExpr2) ->
+ returnM (FromThen expr1' expr2', fvExpr1 `plusFV` fvExpr2)
rn_seq (FromTo expr1 expr2)
- = rnExpr expr1 `thenRn` \ (expr1', fvExpr1) ->
- rnExpr expr2 `thenRn` \ (expr2', fvExpr2) ->
- returnRn (FromTo expr1' expr2', fvExpr1 `plusFV` fvExpr2)
+ = rnExpr expr1 `thenM` \ (expr1', fvExpr1) ->
+ rnExpr expr2 `thenM` \ (expr2', fvExpr2) ->
+ returnM (FromTo expr1' expr2', fvExpr1 `plusFV` fvExpr2)
rn_seq (FromThenTo expr1 expr2 expr3)
- = rnExpr expr1 `thenRn` \ (expr1', fvExpr1) ->
- rnExpr expr2 `thenRn` \ (expr2', fvExpr2) ->
- rnExpr expr3 `thenRn` \ (expr3', fvExpr3) ->
- returnRn (FromThenTo expr1' expr2' expr3',
+ = rnExpr expr1 `thenM` \ (expr1', fvExpr1) ->
+ rnExpr expr2 `thenM` \ (expr2', fvExpr2) ->
+ rnExpr expr3 `thenM` \ (expr3', fvExpr3) ->
+ returnM (FromThenTo expr1' expr2' expr3',
+ plusFVs [fvExpr1, fvExpr2, fvExpr3])
+
+rnExpr (PArrSeqIn seq)
+ = rn_seq seq `thenM` \ (new_seq, fvs) ->
+ returnM (PArrSeqIn new_seq,
+ fvs `plusFV` mkFVs [enumFromToPName, enumFromThenToPName])
+ where
+
+ -- the parser shouldn't generate these two
+ --
+ rn_seq (From _ ) = panic "RnExpr.rnExpr: Infinite parallel array!"
+ rn_seq (FromThen _ _) = panic "RnExpr.rnExpr: Infinite parallel array!"
+
+ rn_seq (FromTo expr1 expr2)
+ = rnExpr expr1 `thenM` \ (expr1', fvExpr1) ->
+ rnExpr expr2 `thenM` \ (expr2', fvExpr2) ->
+ returnM (FromTo expr1' expr2', fvExpr1 `plusFV` fvExpr2)
+ rn_seq (FromThenTo expr1 expr2 expr3)
+ = rnExpr expr1 `thenM` \ (expr1', fvExpr1) ->
+ rnExpr expr2 `thenM` \ (expr2', fvExpr2) ->
+ rnExpr expr3 `thenM` \ (expr3', fvExpr3) ->
+ returnM (FromThenTo expr1' expr2' expr3',
plusFVs [fvExpr1, fvExpr2, fvExpr3])
\end{code}
We return a (bogus) EWildPat in each case.
\begin{code}
-rnExpr e@EWildPat = addErrRn (patSynErr e) `thenRn_`
- returnRn (EWildPat, emptyFVs)
+rnExpr e@EWildPat = addErr (patSynErr e) `thenM_`
+ returnM (EWildPat, emptyFVs)
-rnExpr e@(EAsPat _ _) = addErrRn (patSynErr e) `thenRn_`
- returnRn (EWildPat, emptyFVs)
+rnExpr e@(EAsPat _ _) = addErr (patSynErr e) `thenM_`
+ returnM (EWildPat, emptyFVs)
-rnExpr e@(ELazyPat _) = addErrRn (patSynErr e) `thenRn_`
- returnRn (EWildPat, emptyFVs)
+rnExpr e@(ELazyPat _) = addErr (patSynErr e) `thenM_`
+ returnM (EWildPat, emptyFVs)
\end{code}
\begin{code}
rnRbinds str rbinds
- = mapRn_ field_dup_err dup_fields `thenRn_`
- mapFvRn rn_rbind rbinds `thenRn` \ (rbinds', fvRbind) ->
- returnRn (rbinds', fvRbind)
+ = mappM_ field_dup_err dup_fields `thenM_`
+ mapFvRn rn_rbind rbinds `thenM` \ (rbinds', fvRbind) ->
+ returnM (rbinds', fvRbind)
where
- (_, dup_fields) = removeDups compare [ f | (f,_,_) <- rbinds ]
+ (_, dup_fields) = removeDups compare [ f | (f,_) <- rbinds ]
- field_dup_err dups = addErrRn (dupFieldErr str dups)
+ field_dup_err dups = addErr (dupFieldErr str dups)
- rn_rbind (field, expr, pun)
- = lookupGlobalOccRn field `thenRn` \ fieldname ->
- rnExpr expr `thenRn` \ (expr', fvExpr) ->
- returnRn ((fieldname, expr', pun), fvExpr `addOneFV` fieldname)
+ rn_rbind (field, expr)
+ = lookupGlobalOccRn field `thenM` \ fieldname ->
+ rnExpr expr `thenM` \ (expr', fvExpr) ->
+ returnM ((fieldname, expr'), fvExpr `addOneFV` fieldname)
rnRpats rpats
- = mapRn_ field_dup_err dup_fields `thenRn_`
- mapFvRn rn_rpat rpats `thenRn` \ (rpats', fvs) ->
- returnRn (rpats', fvs)
+ = mappM_ field_dup_err dup_fields `thenM_`
+ mapFvRn rn_rpat rpats `thenM` \ (rpats', fvs) ->
+ returnM (rpats', fvs)
where
- (_, dup_fields) = removeDups compare [ f | (f,_,_) <- rpats ]
+ (_, dup_fields) = removeDups compare [ f | (f,_) <- rpats ]
- field_dup_err dups = addErrRn (dupFieldErr "pattern" dups)
+ field_dup_err dups = addErr (dupFieldErr "pattern" dups)
- rn_rpat (field, pat, pun)
- = lookupGlobalOccRn field `thenRn` \ fieldname ->
- rnPat pat `thenRn` \ (pat', fvs) ->
- returnRn ((fieldname, pat', pun), fvs `addOneFV` fieldname)
+ rn_rpat (field, pat)
+ = lookupGlobalOccRn field `thenM` \ fieldname ->
+ rnPat pat `thenM` \ (pat', fvs) ->
+ returnM ((fieldname, pat'), fvs `addOneFV` fieldname)
\end{code}
%************************************************************************
%************************************************************************
\begin{code}
-rnIPBinds [] = returnRn ([], emptyFVs)
+rnIPBinds [] = returnM ([], emptyFVs)
rnIPBinds ((n, expr) : binds)
- = newIPName n `thenRn` \ name ->
- rnExpr expr `thenRn` \ (expr',fvExpr) ->
- rnIPBinds binds `thenRn` \ (binds',fvBinds) ->
- returnRn ((name, expr') : binds', fvExpr `plusFV` fvBinds)
+ = newIPName n `thenM` \ name ->
+ rnExpr expr `thenM` \ (expr',fvExpr) ->
+ rnIPBinds binds `thenM` \ (binds',fvBinds) ->
+ returnM ((name, expr') : binds', fvExpr `plusFV` fvBinds)
\end{code}
%************************************************************************
%* *
+ Template Haskell brackets
+%* *
+%************************************************************************
+
+\begin{code}
+rnBracket (ExpBr e) = rnExpr e `thenM` \ (e', fvs) ->
+ returnM (ExpBr e', fvs)
+rnBracket (PatBr p) = rnPat p `thenM` \ (p', fvs) ->
+ returnM (PatBr p', fvs)
+rnBracket (TypBr t) = rnHsTypeFVs doc t `thenM` \ (t', fvs) ->
+ returnM (TypBr t', fvs)
+ where
+ doc = ptext SLIT("In a Template-Haskell quoted type")
+rnBracket (DecBr ds) = rnSrcDecls ds `thenM` \ (tcg_env, ds', fvs) ->
+ -- Discard the tcg_env; it contains the extended global RdrEnv
+ -- because there is no scope that these decls cover (yet!)
+ returnM (DecBr ds', fvs)
+\end{code}
+
+%************************************************************************
+%* *
\subsubsection{@Stmt@s: in @do@ expressions}
%* *
%************************************************************************
Quals.
\begin{code}
-type RnExprTy = RdrNameHsExpr -> RnMS (RenamedHsExpr, FreeVars)
-
-rnStmts :: RnExprTy
- -> [RdrNameStmt]
- -> RnMS ([RenamedStmt], FreeVars)
-
-rnStmts rn_expr []
- = returnRn ([], emptyFVs)
-
-rnStmts rn_expr (stmt:stmts)
- = rnStmt rn_expr stmt $ \ stmt' ->
- rnStmts rn_expr stmts `thenRn` \ (stmts', fvs) ->
- returnRn (stmt' : stmts', fvs)
-
-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
- = 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)
+rnStmts :: [RdrNameStmt]
+ -> RnM (([Name], [RenamedStmt]), FreeVars)
+
+rnStmts []
+ = returnM (([], []), emptyFVs)
+
+rnStmts (stmt:stmts)
+ = getLocalRdrEnv `thenM` \ name_env ->
+ rnStmt stmt $ \ stmt' ->
+ rnStmts stmts `thenM` \ ((binders, stmts'), fvs) ->
+ returnM ((binders, stmt' : stmts'), fvs)
+
+rnStmt :: RdrNameStmt
+ -> (RenamedStmt -> RnM (([Name], a), FreeVars))
+ -> RnM (([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 (ParStmt stmtss) thing_inside
+ = mapFvRn rnStmts stmtss `thenM` \ (bndrstmtss, fv_stmtss) ->
+ let binderss = map fst bndrstmtss
+ checkBndrs all_bndrs bndrs
+ = checkErr (null (intersectBy eqOcc all_bndrs bndrs)) err `thenM_`
+ returnM (bndrs ++ all_bndrs)
+ eqOcc n1 n2 = nameOccName n1 == nameOccName n2
+ err = text "duplicate binding in parallel list comprehension"
+ in
+ foldlM checkBndrs [] binderss `thenM` \ new_binders ->
+ bindLocalNamesFV new_binders $
+ thing_inside (ParStmtOut bndrstmtss)`thenM` \ ((rest_bndrs, result), fv_rest) ->
+ returnM ((new_binders ++ rest_bndrs, result), fv_stmtss `plusFV` fv_rest)
+
+rnStmt (BindStmt pat expr src_loc) thing_inside
+ = addSrcLoc src_loc $
+ rnExpr expr `thenM` \ (expr', fv_expr) ->
+ bindPatSigTyVars (collectSigTysFromPat pat) $
+ bindLocalsFVRn doc (collectPatBinders pat) $ \ new_binders ->
+ rnPat pat `thenM` \ (pat', fv_pat) ->
+ thing_inside (BindStmt pat' expr' src_loc) `thenM` \ ((rest_binders, result), fvs) ->
+ returnM ((new_binders ++ rest_binders, result),
+ fv_expr `plusFV` fvs `plusFV` fv_pat)
where
- binders = collectPatBinders pat
- doc = text "a pattern in do binding"
-
-rnStmt rn_expr (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) ->
- returnRn (result, fv_expr `plusFV` fvs)
-
-rnStmt rn_expr (GuardStmt 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) ->
- returnRn (result, fv_expr `plusFV` fvs)
-
-rnStmt rn_expr (LetStmt binds) thing_inside
- = rnBinds binds $ \ binds' ->
- thing_inside (LetStmt binds')
+ doc = text "In a pattern in 'do' binding"
+
+rnStmt (ExprStmt expr _ src_loc) thing_inside
+ = addSrcLoc src_loc $
+ rnExpr expr `thenM` \ (expr', fv_expr) ->
+ thing_inside (ExprStmt expr' placeHolderType src_loc) `thenM` \ (result, fvs) ->
+ returnM (result, fv_expr `plusFV` fvs)
+
+rnStmt (ResultStmt expr src_loc) thing_inside
+ = addSrcLoc src_loc $
+ rnExpr expr `thenM` \ (expr', fv_expr) ->
+ thing_inside (ResultStmt expr' src_loc) `thenM` \ (result, fvs) ->
+ returnM (result, fv_expr `plusFV` fvs)
+
+rnStmt (LetStmt binds) thing_inside
+ = rnBinds binds $ \ binds' ->
+ let new_binders = collectHsBinders binds' in
+ thing_inside (LetStmt binds') `thenM` \ ((rest_binders, result), fvs) ->
+ returnM ((new_binders ++ rest_binders, result), fvs )
\end{code}
%************************************************************************
-> RenamedHsExpr -> Fixity -- Operator and fixity
-> RenamedHsExpr -- Right operand (not an OpApp, but might
-- be a NegApp)
- -> RnMS RenamedHsExpr
+ -> RnM RenamedHsExpr
---------------------------
-- (e11 `op1` e12) `op2` e2
mkOpAppRn e1@(OpApp e11 op1 fix1 e12) op2 fix2 e2
| nofix_error
- = addErrRn (precParseErr (ppr_op op1,fix1) (ppr_op op2,fix2)) `thenRn_`
- returnRn (OpApp e1 op2 fix2 e2)
+ = addErr (precParseErr (ppr_op op1,fix1) (ppr_op op2,fix2)) `thenM_`
+ returnM (OpApp e1 op2 fix2 e2)
| associate_right
- = mkOpAppRn e12 op2 fix2 e2 `thenRn` \ new_e ->
- returnRn (OpApp e11 op1 fix1 new_e)
+ = mkOpAppRn e12 op2 fix2 e2 `thenM` \ new_e ->
+ returnM (OpApp e11 op1 fix1 new_e)
where
(nofix_error, associate_right) = compareFixity fix1 fix2
---------------------------
-- (- 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)
+ = addErr (precParseErr (pp_prefix_minus,negateFixity) (ppr_op op2,fix2)) `thenM_`
+ returnM (OpApp e1 op2 fix2 e2)
| associate_right
- = mkOpAppRn neg_arg op2 fix2 e2 `thenRn` \ new_e ->
- returnRn (NegApp new_e neg_op)
+ = mkOpAppRn neg_arg op2 fix2 e2 `thenM` \ new_e ->
+ returnM (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
- = addErrRn (precParseErr (ppr_op op1, fix1) (pp_prefix_minus, negateFixity)) `thenRn_`
- returnRn (OpApp e1 op1 fix1 e2)
+mkOpAppRn e1 op1 fix1 e2@(NegApp neg_arg _) -- NegApp can occur on the right
+ | not associate_right -- We *want* right association
+ = addErr (precParseErr (ppr_op op1, fix1) (pp_prefix_minus, negateFixity)) `thenM_`
+ returnM (OpApp e1 op1 fix1 e2)
where
(_, associate_right) = compareFixity fix1 negateFixity
= ASSERT2( right_op_ok fix e2,
ppr e1 $$ text "---" $$ ppr op $$ text "---" $$ ppr fix $$ text "---" $$ ppr e2
)
- returnRn (OpApp e1 op fix e2)
+ returnM (OpApp e1 op fix e2)
-- Parser left-associates everything, but
-- derived instances may have correctly-associated things to
= 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 ->
+ getModeRn `thenM` \ mode ->
ASSERT( not_op_app mode neg_arg )
#endif
- returnRn (NegApp neg_arg neg_op)
+ returnM (NegApp neg_arg neg_name)
not_op_app SourceMode (OpApp _ _ _ _) = False
not_op_app mode other = True
\end{code}
\begin{code}
-mkConOpPatRn :: RenamedPat -> Name -> Fixity -> RenamedPat
- -> RnMS RenamedPat
-
-mkConOpPatRn p1@(ConOpPatIn p11 op1 fix1 p12)
- op2 fix2 p2
- | nofix_error
- = addErrRn (precParseErr (ppr_op op1,fix1) (ppr_op op2,fix2)) `thenRn_`
- returnRn (ConOpPatIn p1 op2 fix2 p2)
+mkConOpPatRn :: Name -> Fixity -> RenamedPat -> RenamedPat
+ -> RnM RenamedPat
- | associate_right
- = mkConOpPatRn p12 op2 fix2 p2 `thenRn` \ new_p ->
- returnRn (ConOpPatIn p11 op1 fix1 new_p)
-
- where
- (nofix_error, associate_right) = compareFixity fix1 fix2
+mkConOpPatRn op2 fix2 p1@(ConPatIn op1 (InfixCon p11 p12)) p2
+ = lookupFixityRn op1 `thenM` \ fix1 ->
+ let
+ (nofix_error, associate_right) = compareFixity fix1 fix2
+ in
+ if nofix_error then
+ addErr (precParseErr (ppr_op op1,fix1) (ppr_op op2,fix2)) `thenM_`
+ returnM (ConPatIn op2 (InfixCon p1 p2))
+ else
+ if associate_right then
+ mkConOpPatRn op2 fix2 p12 p2 `thenM` \ new_p ->
+ returnM (ConPatIn op1 (InfixCon p11 new_p))
+ else
+ returnM (ConPatIn op2 (InfixCon p1 p2))
-mkConOpPatRn p1 op fix p2 -- Default case, no rearrangment
+mkConOpPatRn op fix p1 p2 -- Default case, no rearrangment
= ASSERT( not_op_pat p2 )
- returnRn (ConOpPatIn p1 op fix p2)
+ returnM (ConPatIn op (InfixCon p1 p2))
-not_op_pat (ConOpPatIn _ _ _ _) = False
-not_op_pat other = True
+not_op_pat (ConPatIn _ (InfixCon _ _)) = False
+not_op_pat other = True
\end{code}
\begin{code}
-checkPrecMatch :: Bool -> Name -> RenamedMatch -> RnMS ()
+checkPrecMatch :: Bool -> Name -> RenamedMatch -> RnM ()
checkPrecMatch False fn match
- = returnRn ()
+ = returnM ()
-checkPrecMatch True op (Match _ (p1:p2:_) _ _)
+checkPrecMatch True op (Match (p1:p2:_) _ _)
-- True indicates an infix lhs
- = getModeRn `thenRn` \ mode ->
+ = getModeRn `thenM` \ 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 returnM ()
+ else checkPrec op p1 False `thenM_`
+ checkPrec op p2 True
checkPrecMatch True op _ = panic "checkPrecMatch"
-checkPrec op (ConOpPatIn _ op1 _ _) right
- = lookupFixityRn op `thenRn` \ op_fix@(Fixity op_prec op_dir) ->
- lookupFixityRn op1 `thenRn` \ op1_fix@(Fixity op1_prec op1_dir) ->
+checkPrec op (ConPatIn op1 (InfixCon _ _)) right
+ = lookupFixityRn op `thenM` \ op_fix@(Fixity op_prec op_dir) ->
+ lookupFixityRn op1 `thenM` \ op1_fix@(Fixity op1_prec op1_dir) ->
let
inf_ok = op1_prec > op_prec ||
(op1_prec == op_prec &&
info1 = (ppr_op op1, op1_fix)
(infol, infor) = if right then (info, info1) else (info1, info)
in
- checkRn inf_ok (precParseErr infol infor)
+ checkErr inf_ok (precParseErr infol infor)
checkPrec op pat right
- = returnRn ()
+ = returnM ()
-- Check precedence of (arg op) or (op arg) respectively
--- If arg is itself an operator application, its precedence should
--- be higher than that of op
-checkSectionPrec left_or_right section op arg
+-- If arg is itself an operator application, then either
+-- (a) its precedence must be higher than that of op
+-- (b) its precedency & associativity must be the same as that of op
+checkSectionPrec direction section op arg
= case arg of
OpApp _ op fix _ -> go_for_it (ppr_op op) fix
NegApp _ _ -> go_for_it pp_prefix_minus negateFixity
- other -> returnRn ()
+ other -> returnM ()
where
HsVar op_name = op
- go_for_it pp_arg_op arg_fix@(Fixity arg_prec _)
- = lookupFixityRn op_name `thenRn` \ op_fix@(Fixity op_prec _) ->
- checkRn (op_prec < arg_prec)
- (sectionPrecErr (ppr_op op_name, op_fix) (pp_arg_op, arg_fix) section)
+ go_for_it pp_arg_op arg_fix@(Fixity arg_prec assoc)
+ = lookupFixityRn op_name `thenM` \ op_fix@(Fixity op_prec _) ->
+ checkErr (op_prec < arg_prec
+ || op_prec == arg_prec && direction == assoc)
+ (sectionPrecErr (ppr_op op_name, op_fix)
+ (pp_arg_op, arg_fix) section)
\end{code}
-Consider
-\begin{verbatim}
- a `op1` b `op2` c
-\end{verbatim}
-@(compareFixity op1 op2)@ tells which way to arrange appication, or
-whether there's an error.
-
-\begin{code}
-compareFixity :: Fixity -> Fixity
- -> (Bool, -- Error please
- Bool) -- Associate to the right: a op1 (b op2 c)
-compareFixity (Fixity prec1 dir1) (Fixity prec2 dir2)
- = case prec1 `compare` prec2 of
- GT -> left
- LT -> right
- EQ -> case (dir1, dir2) of
- (InfixR, InfixR) -> right
- (InfixL, InfixL) -> left
- _ -> error_please
- where
- right = (False, True)
- left = (False, False)
- error_please = (True, False)
-\end{code}
%************************************************************************
%* *
are made available.
\begin{code}
-litFVs (HsChar c) = 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 (HsChar c)
+ = checkErr (inCharRange c) (bogusCharError c) `thenM_`
+ returnM (unitFV charTyCon_name)
+
+litFVs (HsCharPrim c) = returnM (unitFV (getName charPrimTyCon))
+litFVs (HsString s) = returnM (mkFVs [listTyCon_name, charTyCon_name])
+litFVs (HsStringPrim s) = returnM (unitFV (getName addrPrimTyCon))
+litFVs (HsInt i) = returnM (unitFV (getName intTyCon))
+litFVs (HsIntPrim i) = returnM (unitFV (getName intPrimTyCon))
+litFVs (HsFloatPrim f) = returnM (unitFV (getName floatPrimTyCon))
+litFVs (HsDoublePrim d) = returnM (unitFV (getName doublePrimTyCon))
+litFVs (HsLitLit l bogus_ty) = returnM (unitFV cCallableClassName)
litFVs lit = pprPanic "RnExpr.litFVs" (ppr lit) -- HsInteger and HsRat only appear
-- in post-typechecker translations
-rnOverLit (HsIntegral i from_integer)
- = lookupOccRn from_integer `thenRn` \ from_integer' ->
- (if inIntRange i then
- returnRn emptyFVs
- else
- lookupOrigNames [plusInteger_RDR, timesInteger_RDR]
- ) `thenRn` \ ns ->
- returnRn (HsIntegral i from_integer', ns `addOneFV` from_integer')
+rnOverLit (HsIntegral i _)
+ = lookupSyntaxName fromIntegerName `thenM` \ (from_integer_name, fvs) ->
+ if inIntRange i then
+ returnM (HsIntegral i from_integer_name, fvs)
+ else let
+ extra_fvs = mkFVs [plusIntegerName, timesIntegerName]
+ -- 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.]
+ in
+ returnM (HsIntegral i from_integer_name, fvs `plusFV` extra_fvs)
-rnOverLit (HsFractional i n)
- = lookupOccRn n `thenRn` \ n' ->
- lookupOrigNames [ratioDataCon_RDR, plusInteger_RDR, timesInteger_RDR] `thenRn` \ ns' ->
+rnOverLit (HsFractional i _)
+ = lookupSyntaxName fromRationalName `thenM` \ (from_rat_name, fvs) ->
+ let
+ extra_fvs = mkFVs [ratioDataConName, plusIntegerName, timesIntegerName]
-- 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.
+ -- as part of the type for fromRational.
-- The plus/times integer operations may be needed to construct the numerator
-- and denominator (see DsUtils.mkIntegerLit)
- returnRn (HsFractional i n', ns' `addOneFV` n')
+ in
+ returnM (HsFractional i from_rat_name, fvs `plusFV` extra_fvs)
\end{code}
%************************************************************************
%************************************************************************
\begin{code}
-mkAssertExpr :: RnMS (RenamedHsExpr, FreeVars)
-mkAssertExpr =
- lookupOrigName assertErr_RDR `thenRn` \ name ->
- getSrcLocRn `thenRn` \ sloc ->
-
- -- if we're ignoring asserts, return (\ _ e -> e)
- -- if not, return (assertError "src-loc")
-
- if opt_IgnoreAsserts then
- getUniqRn `thenRn` \ uniq ->
+mkAssertErrorExpr :: RnM (RenamedHsExpr, FreeVars)
+-- Return an expression for (assertError "Foo.hs:27")
+mkAssertErrorExpr
+ = getSrcLocM `thenM` \ sloc ->
let
- 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)
+ expr = HsApp (HsVar assertErrorName) (HsLit msg)
+ msg = HsStringPrim (mkFastString (stringToUtf8 (showSDoc (ppr sloc))))
in
- returnRn (expr, unitFV name)
- else
- let
- expr =
- HsApp (HsVar name)
- (HsLit (HsString (_PK_ (showSDoc (ppr sloc)))))
-
- in
- returnRn (expr, unitFV name)
-
+ returnM (expr, unitFV assertErrorName)
\end{code}
%************************************************************************
\begin{code}
ppr_op op = quotes (ppr op) -- Here, op can be a Name or a (Var n), where n is a Name
-ppr_opfix (pp_op, fixity) = pp_op <+> brackets (ppr fixity)
pp_prefix_minus = ptext SLIT("prefix `-'")
dupFieldErr str (dup:rest)
quotes (ppr dup),
ptext SLIT("in record"), text str]
-precParseErr op1 op2
- = hang (ptext SLIT("precedence parsing error"))
- 4 (hsep [ptext SLIT("cannot mix"), ppr_opfix op1, ptext SLIT("and"),
- ppr_opfix op2,
- ptext SLIT("in the same infix expression")])
-
-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))]
-
nonStdGuardErr guard
= hang (ptext
SLIT("accepting non-standard pattern guards (-fglasgow-exts to suppress this message)")
= sep [ptext SLIT("Pattern syntax in expression context:"),
nest 4 (ppr e)]
+thErr what
+ = ptext SLIT("Template Haskell") <+> text what <+>
+ ptext SLIT("illegal in a stage-1 compiler")
+
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 '\''
+
+withWarning
+ = sep [quotes (ptext SLIT("with")),
+ ptext SLIT("is deprecated, use"),
+ quotes (ptext SLIT("let")),
+ ptext SLIT("instead")]
\end{code}
projects / ghc-hetmet.git / blobdiff