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,
+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, addr2Integer_RDR,
- foldr_RDR, build_RDR
+ ioDataCon_RDR, plusInteger_RDR, timesInteger_RDR
)
import TysPrim ( charPrimTyCon, addrPrimTyCon, intPrimTyCon,
floatPrimTyCon, doublePrimTyCon
)
-import Name ( nameUnique, isLocallyDefined, NamedThing(..)
- , mkSysLocalName, nameSrcLoc
- )
+import TysWiredIn ( intTyCon, integerTyCon )
+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 UniqSet ( emptyUniqSet )
+import ListSetOps ( unionLists, removeDups )
import Maybes ( maybeToBool )
import Outputable
-import Literal ( inIntRange, tARGET_MAX_INT )
-import RdrName ( mkSrcUnqual )
-import OccName ( varName )
\end{code}
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' ->
+ lookupOccRn minus `thenRn` \ minus' ->
+ returnRn (NPlusKPatIn name' lit' minus', fvs `addOneFV` ord `addOneFV` minus')
rnPat (LazyPatIn pat)
= rnPat pat `thenRn` \ (pat', fvs) ->
) `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)
= 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)
\end{code}
************************************************************************
doc_sig = text "a pattern type-signature"
doc_pats = text "in a pattern match"
in
- bindTyVarsFVRn doc_sig (map UserTyVar forall_tyvars) $ \ sig_tyvars ->
+ bindNakedTyVarsFVRn doc_sig forall_tyvars $ \ sig_tyvars ->
-- Note that we do a single bindLocalsRn for all the
-- matches together, so that we spot the repeated variable in
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) ->
returnRn (HsLam match', fvMatch)
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 ->
+ = 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 (HsPar e)
rnExpr (HsCCall fun args may_gc is_casm fake_result_ty)
-- Check out the comment on RnIfaces.getNonWiredDataDecl about ccalls
- = lookupImplicitOccsRn [ccallableClass_RDR,
+ = lookupOrigNames [ccallableClass_RDR,
creturnableClass_RDR,
ioDataCon_RDR] `thenRn` \ implicit_fvs ->
rnExprs args `thenRn` \ (args', fvs_args) ->
rnExpr e@(HsDo do_or_lc stmts src_loc)
= pushSrcLocRn src_loc $
- lookupImplicitOccsRn implicit_rdr_names `thenRn` \ implicit_fvs ->
+ lookupOrigNames implicit_rdr_names `thenRn` \ implicit_fvs ->
rnStmts rnExpr stmts `thenRn` \ (stmts', fvs) ->
-- check the statement list ends in an expression
case last stmts' of {
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"
+
+
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
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 -> HsPar (OpApp x (HsVar (mkSrcUnqual varName (_PK_ op))) (panic "fixity") y)
\end{code}
+
+
%************************************************************************
%* *
\subsubsection{@Rbinds@s and @Rpats@s: in record expressions}
\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)
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)
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 ()
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
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
+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 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')
-litOccurrence (HsFrac _)
- = lookupImplicitOccsRn [fractionalClass_RDR,ratioDataCon_RDR,addr2Integer_RDR]
+rnOverLit (HsFractional i n)
+ = lookupOccRn n `thenRn` \ n' ->
+ 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 n', ns' `addOneFV` n')
\end{code}
%************************************************************************
\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")
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"),
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