free variables.
\begin{code}
-#include "HsVersions.h"
-
module RnExpr (
rnMatch, rnGRHSsAndBinds, rnPat,
checkPrecMatch
) where
-IMP_Ubiq()
-#if defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ <= 201
-IMPORT_DELOOPER(RnLoop) -- break the RnPass/RnExpr/RnBinds loops
-#else
+#include "HsVersions.h"
+
import {-# SOURCE #-} RnBinds
import {-# SOURCE #-} RnSource ( rnHsSigType )
-#endif
import HsSyn
import RdrHsSyn
import TysPrim ( charPrimTyCon, addrPrimTyCon, intPrimTyCon,
floatPrimTyCon, doublePrimTyCon
)
-import TyCon ( TyCon )
-import Id ( GenId )
-import ErrUtils ( addErrLoc, addShortErrLocLine )
import Name
-import Pretty
import UniqFM ( lookupUFM, {- ToDo:rm-} isNullUFM )
import UniqSet ( emptyUniqSet, unitUniqSet,
unionUniqSets, unionManyUniqSets,
- SYN_IE(UniqSet)
+ UniqSet
)
-import Util ( Ord3(..), removeDups, panic, pprPanic, assertPanic )
+import Util ( removeDups )
import Outputable
-
\end{code}
-- f x x = 1
rnMatch match
- = bindLocalsRn "pattern" (get_binders match) $ \ new_binders ->
+ = pushSrcLocRn (getMatchLoc match) $
+ bindLocalsRn "pattern" (get_binders match) $ \ new_binders ->
rnMatch1 match `thenRn` \ (match', fvs) ->
- returnRn (match', fvs `minusNameSet` mkNameSet new_binders)
+ let
+ binder_set = mkNameSet new_binders
+ unused_binders = binder_set `minusNameSet` fvs
+ net_fvs = fvs `minusNameSet` binder_set
+ in
+ warnUnusedNames unused_binders `thenRn_`
+ returnRn (match', net_fvs)
where
get_binders (GRHSMatch _) = []
get_binders (PatMatch pat match) = collectPatBinders pat ++ get_binders match
rnExpr expr `thenRn` \ (expr', fvse) ->
returnRn (GRHS guard' expr' locn, fvse))
- rnGRHS (OtherwiseGRHS expr locn)
- = pushSrcLocRn locn $
- rnExpr expr `thenRn` \ (expr', fvs) ->
- returnRn (GRHS [] expr' locn, fvs)
-
-- 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 [] = True
is_standard_guard [GuardStmt _ _] = True
is_standard_guard other = False
\end{code}
lookupFixity op_name `thenRn` \ fixity ->
getModeRn `thenRn` \ mode ->
(case mode of
- SourceMode -> mkOpAppRn e1' op' fixity e2'
- InterfaceMode _ -> returnRn (OpApp e1' op' fixity e2')
+ SourceMode -> mkOpAppRn e1' op' fixity e2'
+ InterfaceMode _ _ -> returnRn (OpApp e1' op' fixity e2')
) `thenRn` \ final_e ->
returnRn (final_e,
returnRn (SectionR op' expr', fvs_op `unionNameSets` fvs_expr)
rnExpr (CCall fun args may_gc is_casm fake_result_ty)
+ -- Check out the comment on RnIfaces.getNonWiredDataDecl about ccalls
= lookupImplicitOccRn ccallableClass_RDR `thenRn_`
lookupImplicitOccRn creturnableClass_RDR `thenRn_`
lookupImplicitOccRn ioDataCon_RDR `thenRn_`
rnExprs exps `thenRn` \ (exps', fvExps) ->
returnRn (ExplicitTuple exps', fvExps)
-rnExpr (RecordCon con rbinds)
- = lookupOccRn con `thenRn` \ conname ->
+rnExpr (RecordCon con_id _ rbinds)
+ = lookupOccRn con_id `thenRn` \ conname ->
rnRbinds "construction" rbinds `thenRn` \ (rbinds', fvRbinds) ->
- returnRn (RecordCon conname rbinds', fvRbinds)
+ returnRn (RecordCon conname (error "rnExpr:RecordCon") rbinds', fvRbinds)
rnExpr (RecordUpd expr rbinds)
= rnExpr expr `thenRn` \ (expr', fvExpr) ->
returnRn (RecordUpd expr' rbinds', fvExpr `unionNameSets` fvRbinds)
rnExpr (ExprWithTySig expr pty)
- = rnExpr expr `thenRn` \ (expr', fvExpr) ->
- rnHsSigType (\ sty -> text "an expression") pty `thenRn` \ pty' ->
+ = rnExpr expr `thenRn` \ (expr', fvExpr) ->
+ rnHsSigType (text "an expression") pty `thenRn` \ pty' ->
returnRn (ExprWithTySig expr' pty', fvExpr)
rnExpr (HsIf p b1 b2 src_loc)
mapAndUnzipRn rn_rbind rbinds `thenRn` \ (rbinds', fvRbind_s) ->
returnRn (rbinds', unionManyNameSets fvRbind_s)
where
- (_, dup_fields) = removeDups cmp [ f | (f,_,_) <- rbinds ]
+ (_, dup_fields) = removeDups compare [ f | (f,_,_) <- rbinds ]
field_dup_err dups = addErrRn (dupFieldErr str dups)
= mapRn field_dup_err dup_fields `thenRn_`
mapRn rn_rpat rpats
where
- (_, dup_fields) = removeDups cmp [ f | (f,_,_) <- rpats ]
+ (_, dup_fields) = removeDups compare [ f | (f,_,_) <- rpats ]
field_dup_err dups = addErrRn (dupFieldErr "pattern" dups)
(nofix_error, rearrange_me) = compareFixity fix_neg fix2
mkOpAppRn e1 op fix e2 -- Default case, no rearrangment
- = ASSERT( right_op_ok fix e2 )
+ = ASSERT( if right_op_ok fix e2 then True
+ else pprPanic "mkOpAppRn" (vcat [ppr e1, text "---", ppr op, text "---", ppr fix, text "---", ppr e2])
+ )
returnRn (OpApp e1 op fix e2)
get (HsVar n) = n
-> (Bool, -- Error please
Bool) -- Associate to the right: a op1 (b op2 c)
compareFixity (Fixity prec1 dir1) (Fixity prec2 dir2)
- = case prec1 `cmp` prec2 of
- GT_ -> left
- LT_ -> right
- EQ_ -> case (dir1, dir2) of
+ = case prec1 `compare` prec2 of
+ GT -> left
+ LT -> right
+ EQ -> case (dir1, dir2) of
(InfixR, InfixR) -> right
(InfixL, InfixL) -> left
_ -> error_please
lookupImplicitOccRn ratioDataCon_RDR
-- 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.
+ -- built with that constructor.
+ -- The Rational type is needed too, but that will come in
+ -- when fractionalClass does.
litOccurrence (HsIntPrim _)
= addImplicitOccRn (getName intPrimTyCon)
%************************************************************************
\begin{code}
-dupFieldErr str (dup:rest) sty
- = hcat [ptext SLIT("duplicate field name `"),
- ppr sty dup,
- ptext SLIT("' in record "), text str]
+dupFieldErr str (dup:rest)
+ = hsep [ptext SLIT("duplicate field name"),
+ quotes (ppr dup),
+ ptext SLIT("in record"), text str]
-negPatErr pat sty
- = sep [ptext SLIT("prefix `-' not applied to literal in pattern"), ppr sty pat]
+negPatErr pat
+ = sep [ptext SLIT("prefix `-' not applied to literal in pattern"), quotes (ppr pat)]
-precParseNegPatErr op sty
+precParseNegPatErr op
= hang (ptext SLIT("precedence parsing error"))
- 4 (hcat [ptext SLIT("prefix `-' has lower precedence than "),
- pp_op sty op,
- ptext SLIT(" in pattern")])
+ 4 (hsep [ptext SLIT("prefix `-' has lower precedence than"),
+ quotes (pp_op op),
+ ptext SLIT("in pattern")])
-precParseErr op1 op2 sty
+precParseErr op1 op2
= hang (ptext SLIT("precedence parsing error"))
- 4 (hcat [ptext SLIT("cannot mix "), pp_op sty op1, ptext SLIT(" and "), pp_op sty op2,
- ptext SLIT(" in the same infix expression")])
+ 4 (hsep [ptext SLIT("cannot mix"), quotes (pp_op op1), ptext SLIT("and"),
+ quotes (pp_op op2),
+ ptext SLIT("in the same infix expression")])
-nonStdGuardErr guard sty
+nonStdGuardErr guard
= hang (ptext SLIT("accepting non-standard pattern guards (-fglasgow-exts to suppress this message)"))
- 4 (ppr sty guard)
+ 4 (ppr guard)
-pp_op sty (op, fix) = hcat [ppr sty op, space, parens (ppr sty fix)]
+pp_op (op, fix) = hcat [ppr op, space, parens (ppr fix)]
\end{code}
projects / ghc-hetmet.git / blobdiff