3 % (c) University of Glasgow, 2007
5 \section[Coverage]{@coverage@: the main function}
9 -- The above warning supression flag is a temporary kludge.
10 -- While working on this module you are encouraged to remove it and fix
11 -- any warnings in the module. See
12 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
15 module Coverage (addCoverageTicksToBinds) where
17 #include "HsVersions.h"
41 import System.Time (ClockTime(..))
42 import System.IO (FilePath)
43 #if __GLASGOW_HASKELL__ < 603
44 import Compat.Directory ( createDirectoryIfMissing )
46 import System.Directory ( createDirectoryIfMissing )
53 import Data.HashTable ( hashString )
57 %************************************************************************
59 %* The main function: addCoverageTicksToBinds
61 %************************************************************************
64 addCoverageTicksToBinds
67 -> ModLocation -- of the current module
68 -> [TyCon] -- type constructor in this module
70 -> IO (LHsBinds Id, HpcInfo, ModBreaks)
72 addCoverageTicksToBinds dflags mod mod_loc tyCons binds = do
75 case ml_hs_file mod_loc of
77 Nothing -> panic "can not find the original file during hpc trans"
79 if "boot" `isSuffixOf` orig_file then return (binds, emptyHpcInfo False, emptyModBreaks) else do
81 let mod_name = moduleNameString (moduleName mod)
84 = unTM (addTickLHsBinds binds)
86 { fileName = mkFastString orig_file
88 , inScope = emptyVarSet
89 , blackList = listToFM [ (getSrcSpan (tyConName tyCon),())
97 let entries = reverse $ mixEntries st
99 -- write the mix entries for this module
100 hashNo <- if opt_Hpc then do
101 let hpc_dir = hpcDir dflags
103 let hpc_mod_dir = if modulePackageId mod == mainPackageId
105 else hpc_dir ++ "/" ++ packageIdString (modulePackageId mod)
107 let tabStop = 1 -- <tab> counts as a normal char in GHC's location ranges.
108 createDirectoryIfMissing True hpc_mod_dir
109 modTime <- getModificationTime orig_file
110 let entries' = [ (hpcPos, box)
111 | (span,_,box) <- entries, hpcPos <- [mkHpcPos span] ]
112 when (length entries' /= tickBoxCount st) $ do
113 panic "the number of .mix entries are inconsistent"
114 let hashNo = mixHash orig_file modTime tabStop entries'
115 mixCreate hpc_mod_dir mod_name
116 $ Mix orig_file modTime (toHash hashNo) tabStop entries'
121 -- Todo: use proper src span type
122 breakArray <- newBreakArray $ length entries
124 let locsTicks = listArray (0,tickBoxCount st-1)
125 [ span | (span,_,_) <- entries ]
126 varsTicks = listArray (0,tickBoxCount st-1)
127 [ vars | (_,vars,_) <- entries ]
128 modBreaks = emptyModBreaks
129 { modBreaks_flags = breakArray
130 , modBreaks_locs = locsTicks
131 , modBreaks_vars = varsTicks
134 doIfSet_dyn dflags Opt_D_dump_hpc $ do
135 printDump (pprLHsBinds binds1)
137 return (binds1, HpcInfo (tickBoxCount st) hashNo, modBreaks)
142 liftL :: (Monad m) => (a -> m a) -> Located a -> m (Located a)
143 liftL f (L loc a) = do
147 addTickLHsBinds :: LHsBinds Id -> TM (LHsBinds Id)
148 addTickLHsBinds binds = mapBagM addTickLHsBind binds
150 addTickLHsBind :: LHsBind Id -> TM (LHsBind Id)
151 addTickLHsBind (L pos t@(AbsBinds abs_tvs abs_dicts abs_exports abs_binds)) = do
152 abs_binds' <- addTickLHsBinds abs_binds
153 return $ L pos $ AbsBinds abs_tvs abs_dicts abs_exports abs_binds'
154 addTickLHsBind (L pos (funBind@(FunBind { fun_id = (L _ id) }))) = do
155 let name = getOccString id
156 decl_path <- getPathEntry
158 (fvs, mg@(MatchGroup matches' ty)) <-
161 addTickMatchGroup (fun_matches funBind)
163 blackListed <- isBlackListed pos
165 -- Todo: we don't want redundant ticks on simple pattern bindings
166 -- We don't want to generate code for blacklisted positions
167 if blackListed || (not opt_Hpc && isSimplePatBind funBind)
169 return $ L pos $ funBind { fun_matches = MatchGroup matches' ty
173 tick_no <- allocATickBox (if null decl_path
174 then TopLevelBox [name]
175 else LocalBox (decl_path ++ [name]))
178 return $ L pos $ funBind { fun_matches = MatchGroup matches' ty
182 -- a binding is a simple pattern binding if it is a funbind with zero patterns
183 isSimplePatBind :: HsBind a -> Bool
184 isSimplePatBind funBind = matchGroupArity (fun_matches funBind) == 0
186 -- TODO: Revisit this
187 addTickLHsBind (L pos (pat@(PatBind { pat_rhs = rhs }))) = do
189 rhs' <- addPathEntry name $ addTickGRHSs False rhs
191 decl_path <- getPathEntry
192 tick_me <- allocTickBox (if null decl_path
193 then TopLevelBox [name]
194 else LocalBox (name : decl_path))
196 return $ L pos $ pat { pat_rhs = rhs' }
198 -- Only internal stuff, not from source, uses VarBind, so we ignore it.
199 addTickLHsBind var_bind@(L _ (VarBind {})) = return var_bind
201 -- Add a tick to the expression no matter what it is. There is one exception:
202 -- for the debugger, if the expression is a 'let', then we don't want to add
203 -- a tick here because there will definititely be a tick on the body anyway.
204 addTickLHsExprAlways :: LHsExpr Id -> TM (LHsExpr Id)
205 addTickLHsExprAlways (L pos e0)
206 | not opt_Hpc, HsLet _ _ <- e0 = addTickLHsExprNever (L pos e0)
207 | otherwise = allocTickBox (ExpBox False) pos $ addTickHsExpr e0
209 addTickLHsExprNeverOrAlways :: LHsExpr Id -> TM (LHsExpr Id)
210 addTickLHsExprNeverOrAlways e
211 | opt_Hpc = addTickLHsExprNever e
212 | otherwise = addTickLHsExprAlways e
214 addTickLHsExprNeverOrMaybe :: LHsExpr Id -> TM (LHsExpr Id)
215 addTickLHsExprNeverOrMaybe e
216 | opt_Hpc = addTickLHsExprNever e
217 | otherwise = addTickLHsExpr e
219 -- version of addTick that does not actually add a tick,
220 -- because the scope of this tick is completely subsumed by
222 addTickLHsExprNever :: LHsExpr Id -> TM (LHsExpr Id)
223 addTickLHsExprNever (L pos e0) = do
224 e1 <- addTickHsExpr e0
227 -- selectively add ticks to interesting expressions
228 addTickLHsExpr :: LHsExpr Id -> TM (LHsExpr Id)
229 addTickLHsExpr (L pos e0) = do
230 if opt_Hpc || isGoodBreakExpr e0
232 allocTickBox (ExpBox False) pos $ addTickHsExpr e0
234 e1 <- addTickHsExpr e0
237 -- general heuristic: expressions which do not denote values are good break points
238 isGoodBreakExpr :: HsExpr Id -> Bool
239 isGoodBreakExpr (HsApp {}) = True
240 isGoodBreakExpr (OpApp {}) = True
241 isGoodBreakExpr (NegApp {}) = True
242 isGoodBreakExpr (HsCase {}) = True
243 isGoodBreakExpr (HsIf {}) = True
244 isGoodBreakExpr (RecordCon {}) = True
245 isGoodBreakExpr (RecordUpd {}) = True
246 isGoodBreakExpr (ArithSeq {}) = True
247 isGoodBreakExpr (PArrSeq {}) = True
248 isGoodBreakExpr other = False
250 addTickLHsExprOptAlt :: Bool -> LHsExpr Id -> TM (LHsExpr Id)
251 addTickLHsExprOptAlt oneOfMany (L pos e0)
252 | not opt_Hpc = addTickLHsExpr (L pos e0)
254 allocTickBox (ExpBox oneOfMany) pos $
257 addBinTickLHsExpr :: (Bool -> BoxLabel) -> LHsExpr Id -> TM (LHsExpr Id)
258 addBinTickLHsExpr boxLabel (L pos e0) = do
259 e1 <- addTickHsExpr e0
260 allocBinTickBox boxLabel $ L pos e1
262 addTickHsExpr :: HsExpr Id -> TM (HsExpr Id)
263 addTickHsExpr e@(HsVar id) = do freeVar id; return e
264 addTickHsExpr e@(HsIPVar _) = return e
265 addTickHsExpr e@(HsOverLit _) = return e
266 addTickHsExpr e@(HsLit _) = return e
267 addTickHsExpr e@(HsLam matchgroup) =
268 liftM HsLam (addTickMatchGroup matchgroup)
269 addTickHsExpr (HsApp e1 e2) =
270 liftM2 HsApp (addTickLHsExprNever e1) (addTickLHsExpr e2)
271 addTickHsExpr (OpApp e1 e2 fix e3) =
274 (addTickLHsExprNever e2)
277 addTickHsExpr (NegApp e neg) =
280 (addTickSyntaxExpr hpcSrcSpan neg)
281 addTickHsExpr (HsPar e) = liftM HsPar (addTickLHsExprNeverOrMaybe e)
282 addTickHsExpr (SectionL e1 e2) =
286 addTickHsExpr (SectionR e1 e2) =
290 addTickHsExpr (HsCase e mgs) =
293 (addTickMatchGroup mgs)
294 addTickHsExpr (HsIf e1 e2 e3) =
296 (addBinTickLHsExpr (BinBox CondBinBox) e1)
297 (addTickLHsExprOptAlt True e2)
298 (addTickLHsExprOptAlt True e3)
299 addTickHsExpr (HsLet binds e) =
300 bindLocals (map unLoc $ collectLocalBinders binds) $
302 (addTickHsLocalBinds binds) -- to think about: !patterns.
303 (addTickLHsExprNeverOrAlways e)
304 addTickHsExpr (HsDo cxt stmts last_exp srcloc) = do
305 (stmts', last_exp') <- addTickLStmts' forQual stmts
306 (addTickLHsExpr last_exp)
307 return (HsDo cxt stmts' last_exp' srcloc)
309 forQual = case cxt of
310 ListComp -> Just $ BinBox QualBinBox
312 addTickHsExpr (ExplicitList ty es) =
315 (mapM (addTickLHsExpr) es)
316 addTickHsExpr (ExplicitPArr ty es) =
319 (mapM (addTickLHsExpr) es)
320 addTickHsExpr (ExplicitTuple es box) =
322 (mapM (addTickLHsExpr) es)
324 addTickHsExpr (RecordCon id ty rec_binds) =
328 (addTickHsRecordBinds rec_binds)
329 addTickHsExpr (RecordUpd e rec_binds cons tys1 tys2) =
332 (addTickHsRecordBinds rec_binds)
333 (return cons) (return tys1) (return tys2)
335 addTickHsExpr (ExprWithTySigOut e ty) =
336 liftM2 ExprWithTySigOut
337 (addTickLHsExprNever e) -- No need to tick the inner expression
338 -- for expressions with signatures
340 addTickHsExpr (ArithSeq ty arith_seq) =
343 (addTickArithSeqInfo arith_seq)
344 addTickHsExpr (HsTickPragma (file,(l1,c1),(l2,c2)) (L pos e0)) = do
345 e2 <- allocTickBox (ExpBox False) pos $
348 addTickHsExpr (PArrSeq ty arith_seq) =
351 (addTickArithSeqInfo arith_seq)
352 addTickHsExpr (HsSCC nm e) =
356 addTickHsExpr (HsCoreAnn nm e) =
360 addTickHsExpr e@(HsBracket {}) = return e
361 addTickHsExpr e@(HsBracketOut {}) = return e
362 addTickHsExpr e@(HsSpliceE {}) = return e
363 addTickHsExpr (HsProc pat cmdtop) =
366 (liftL (addTickHsCmdTop) cmdtop)
367 addTickHsExpr (HsWrap w e) =
370 (addTickHsExpr e) -- explicitly no tick on inside
371 addTickHsExpr (HsArrApp e1 e2 ty1 arr_ty lr) =
378 addTickHsExpr (HsArrForm e fix cmdtop) =
382 (mapM (liftL (addTickHsCmdTop)) cmdtop)
384 addTickHsExpr e@(HsType ty) = return e
386 -- Others dhould never happen in expression content.
387 addTickHsExpr e@(ExprWithTySig {}) = pprPanic "addTickHsExpr" (ppr e)
388 addTickHsExpr e@(EAsPat _ _) = pprPanic "addTickHsExpr" (ppr e)
389 addTickHsExpr e@(ELazyPat _) = pprPanic "addTickHsExpr" (ppr e)
390 addTickHsExpr e@(EWildPat) = pprPanic "addTickHsExpr" (ppr e)
391 addTickHsExpr e@(HsBinTick _ _ _) = pprPanic "addTickHsExpr" (ppr e)
392 addTickHsExpr e@(HsTick _ _ _) = pprPanic "addTickHsExpr" (ppr e)
394 addTickMatchGroup (MatchGroup matches ty) = do
395 let isOneOfMany = matchesOneOfMany matches
396 matches' <- mapM (liftL (addTickMatch isOneOfMany)) matches
397 return $ MatchGroup matches' ty
399 addTickMatch :: Bool -> Match Id -> TM (Match Id)
400 addTickMatch isOneOfMany (Match pats opSig gRHSs) =
401 bindLocals (collectPatsBinders pats) $ do
402 gRHSs' <- addTickGRHSs isOneOfMany gRHSs
403 return $ Match pats opSig gRHSs'
405 addTickGRHSs :: Bool -> GRHSs Id -> TM (GRHSs Id)
406 addTickGRHSs isOneOfMany (GRHSs guarded local_binds) = do
407 bindLocals binders $ do
408 local_binds' <- addTickHsLocalBinds local_binds
409 guarded' <- mapM (liftL (addTickGRHS isOneOfMany)) guarded
410 return $ GRHSs guarded' local_binds'
412 binders = map unLoc (collectLocalBinders local_binds)
414 addTickGRHS :: Bool -> GRHS Id -> TM (GRHS Id)
415 addTickGRHS isOneOfMany (GRHS stmts expr) = do
416 (stmts',expr') <- addTickLStmts' (Just $ BinBox $ GuardBinBox) stmts
417 (if opt_Hpc then addTickLHsExprOptAlt isOneOfMany expr
418 else addTickLHsExprAlways expr)
419 return $ GRHS stmts' expr'
421 addTickLStmts :: (Maybe (Bool -> BoxLabel)) -> [LStmt Id] -> TM [LStmt Id]
422 addTickLStmts isGuard stmts = do
423 (stmts, _) <- addTickLStmts' isGuard stmts (return ())
426 addTickLStmts' :: (Maybe (Bool -> BoxLabel)) -> [LStmt Id] -> TM a
427 -> TM ([LStmt Id], a)
428 addTickLStmts' isGuard lstmts res
429 = bindLocals binders $ do
430 lstmts' <- mapM (liftL (addTickStmt isGuard)) lstmts
434 binders = map unLoc (collectLStmtsBinders lstmts)
436 addTickStmt :: (Maybe (Bool -> BoxLabel)) -> Stmt Id -> TM (Stmt Id)
437 addTickStmt isGuard (BindStmt pat e bind fail) = do
440 (addTickLHsExprAlways e)
441 (addTickSyntaxExpr hpcSrcSpan bind)
442 (addTickSyntaxExpr hpcSrcSpan fail)
443 addTickStmt isGuard (ExprStmt e bind' ty) = do
446 (addTickSyntaxExpr hpcSrcSpan bind')
449 addTick e | Just fn <- isGuard = addBinTickLHsExpr fn e
450 | otherwise = addTickLHsExprAlways e
452 addTickStmt isGuard (LetStmt binds) = do
454 (addTickHsLocalBinds binds)
455 addTickStmt isGuard (ParStmt pairs) = do
456 liftM ParStmt (mapM process pairs)
458 process (stmts,ids) =
460 (addTickLStmts isGuard stmts)
462 addTickStmt isGuard (RecStmt stmts ids1 ids2 tys dictbinds) = do
464 (addTickLStmts isGuard stmts)
468 (addTickDictBinds dictbinds)
470 addTickHsLocalBinds :: HsLocalBinds Id -> TM (HsLocalBinds Id)
471 addTickHsLocalBinds (HsValBinds binds) =
473 (addTickHsValBinds binds)
474 addTickHsLocalBinds (HsIPBinds binds) =
476 (addTickHsIPBinds binds)
477 addTickHsLocalBinds (EmptyLocalBinds) = return EmptyLocalBinds
479 addTickHsValBinds (ValBindsOut binds sigs) =
481 (mapM (\ (rec,binds') ->
484 (addTickLHsBinds binds'))
488 addTickHsIPBinds (IPBinds ipbinds dictbinds) =
490 (mapM (liftL (addTickIPBind)) ipbinds)
491 (addTickDictBinds dictbinds)
493 addTickIPBind :: IPBind Id -> TM (IPBind Id)
494 addTickIPBind (IPBind nm e) =
499 -- There is no location here, so we might need to use a context location??
500 addTickSyntaxExpr :: SrcSpan -> SyntaxExpr Id -> TM (SyntaxExpr Id)
501 addTickSyntaxExpr pos x = do
502 L _ x' <- addTickLHsExpr (L pos x)
504 -- we do not walk into patterns.
505 addTickLPat :: LPat Id -> TM (LPat Id)
506 addTickLPat pat = return pat
508 addTickHsCmdTop :: HsCmdTop Id -> TM (HsCmdTop Id)
509 addTickHsCmdTop (HsCmdTop cmd tys ty syntaxtable) =
516 addTickLHsCmd :: LHsCmd Id -> TM (LHsCmd Id)
517 addTickLHsCmd x = addTickLHsExpr x
519 addTickDictBinds :: DictBinds Id -> TM (DictBinds Id)
520 addTickDictBinds x = addTickLHsBinds x
522 addTickHsRecordBinds :: HsRecordBinds Id -> TM (HsRecordBinds Id)
523 addTickHsRecordBinds (HsRecFields fields dd)
524 = do { fields' <- mapM process fields
525 ; return (HsRecFields fields' dd) }
527 process (HsRecField ids expr doc)
528 = do { expr' <- addTickLHsExpr expr
529 ; return (HsRecField ids expr' doc) }
531 addTickArithSeqInfo :: ArithSeqInfo Id -> TM (ArithSeqInfo Id)
532 addTickArithSeqInfo (From e1) =
535 addTickArithSeqInfo (FromThen e1 e2) =
539 addTickArithSeqInfo (FromTo e1 e2) =
543 addTickArithSeqInfo (FromThenTo e1 e2 e3) =
551 data TickTransState = TT { tickBoxCount:: Int
552 , mixEntries :: [MixEntry_]
555 data TickTransEnv = TTE { fileName :: FastString
556 , declPath :: [String]
558 , blackList :: FiniteMap SrcSpan ()
563 type FreeVars = OccEnv Id
567 -- For breakpoints we want to collect the free variables of an
568 -- expression for pinning on the HsTick. We don't want to collect
569 -- *all* free variables though: in particular there's no point pinning
570 -- on free variables that are will otherwise be in scope at the GHCi
571 -- prompt, which means all top-level bindings. Unfortunately detecting
572 -- top-level bindings isn't easy (collectHsBindsBinders on the top-level
573 -- bindings doesn't do it), so we keep track of a set of "in-scope"
574 -- variables in addition to the free variables, and the former is used
575 -- to filter additions to the latter. This gives us complete control
576 -- over what free variables we track.
578 data TM a = TM { unTM :: TickTransEnv -> TickTransState -> (a,FreeVars,TickTransState) }
579 -- a combination of a state monad (TickTransState) and a writer
582 instance Monad TM where
583 return a = TM $ \ env st -> (a,noFVs,st)
584 (TM m) >>= k = TM $ \ env st ->
587 case unTM (k r1) env st1 of
589 (r2, fv1 `plusOccEnv` fv2, st2)
591 -- getState :: TM TickTransState
592 -- getState = TM $ \ env st -> (st, noFVs, st)
594 setState :: (TickTransState -> TickTransState) -> TM ()
595 setState f = TM $ \ env st -> ((), noFVs, f st)
597 getEnv :: TM TickTransEnv
598 getEnv = TM $ \ env st -> (env, noFVs, st)
600 withEnv :: (TickTransEnv -> TickTransEnv) -> TM a -> TM a
601 withEnv f (TM m) = TM $ \ env st ->
603 (a, fvs, st') -> (a, fvs, st')
605 getFreeVars :: TM a -> TM (FreeVars, a)
607 = TM $ \ env st -> case m env st of (a, fv, st') -> ((fv,a), fv, st')
609 freeVar :: Id -> TM ()
610 freeVar id = TM $ \ env st ->
611 if id `elemVarSet` inScope env
612 then ((), unitOccEnv (nameOccName (idName id)) id, st)
615 addPathEntry :: String -> TM a -> TM a
616 addPathEntry nm = withEnv (\ env -> env { declPath = declPath env ++ [nm] })
618 getPathEntry :: TM [String]
619 getPathEntry = declPath `liftM` getEnv
621 getFileName :: TM FastString
622 getFileName = fileName `liftM` getEnv
624 sameFileName :: SrcSpan -> TM a -> TM a -> TM a
625 sameFileName pos out_of_scope in_scope = do
626 file_name <- getFileName
627 case optSrcSpanFileName pos of
629 | file_name == file_name2 -> in_scope
632 bindLocals :: [Id] -> TM a -> TM a
633 bindLocals new_ids (TM m)
635 case m env{ inScope = inScope env `extendVarSetList` new_ids } st of
636 (r, fv, st') -> (r, fv `delListFromOccEnv` occs, st')
637 where occs = [ nameOccName (idName id) | id <- new_ids ]
639 isBlackListed :: SrcSpan -> TM Bool
640 isBlackListed pos = TM $ \ env st ->
641 case lookupFM (blackList env) pos of
642 Nothing -> (False,noFVs,st)
643 Just () -> (True,noFVs,st)
645 -- the tick application inherits the source position of its
646 -- expression argument to support nested box allocations
647 allocTickBox :: BoxLabel -> SrcSpan -> TM (HsExpr Id) -> TM (LHsExpr Id)
648 allocTickBox boxLabel pos m | isGoodSrcSpan' pos =
650 (do e <- m; return (L pos e)) $ do
651 (fvs, e) <- getFreeVars m
653 let c = tickBoxCount st
656 me = (pos, map (nameOccName.idName) ids, boxLabel)
658 ( L pos (HsTick c ids (L pos e))
660 , st {tickBoxCount=c+1,mixEntries=me:mes}
662 allocTickBox boxLabel pos m = do e <- m; return (L pos e)
664 -- the tick application inherits the source position of its
665 -- expression argument to support nested box allocations
666 allocATickBox :: BoxLabel -> SrcSpan -> FreeVars -> TM (Maybe (Int,[Id]))
667 allocATickBox boxLabel pos fvs | isGoodSrcSpan' pos =
669 (return Nothing) $ TM $ \ env st ->
670 let me = (pos, map (nameOccName.idName) ids, boxLabel)
676 , st {tickBoxCount=c+1, mixEntries=me:mes}
678 allocATickBox boxLabel pos fvs = return Nothing
680 allocBinTickBox :: (Bool -> BoxLabel) -> LHsExpr Id -> TM (LHsExpr Id)
681 allocBinTickBox boxLabel (L pos e) | isGoodSrcSpan' pos = TM $ \ env st ->
682 let meT = (pos,[],boxLabel True)
683 meF = (pos,[],boxLabel False)
684 meE = (pos,[],ExpBox False)
689 then ( L pos $ HsTick c [] $ L pos $ HsBinTick (c+1) (c+2) (L pos e)
690 -- notice that F and T are reversed,
691 -- because we are building the list in
694 , st {tickBoxCount=c+3 , mixEntries=meF:meT:meE:mes}
697 ( L pos $ HsTick c [] $ L pos e
699 , st {tickBoxCount=c+1,mixEntries=meE:mes}
702 allocBinTickBox boxLabel e = return e
705 | not (isGoodSrcSpan pos) = False
706 | start == end = False
709 start = srcSpanStart pos
712 mkHpcPos :: SrcSpan -> HpcPos
714 | not (isGoodSrcSpan' pos) = panic "bad source span; expected such spans to be filtered out"
717 start = srcSpanStart pos
719 hpcPos = toHpcPos ( srcLocLine start
720 , srcLocCol start + 1
725 noHpcPos = toHpcPos (0,0,0,0)
727 hpcSrcSpan = mkGeneralSrcSpan (FSLIT("Haskell Program Coverage internals"))
732 matchesOneOfMany :: [LMatch Id] -> Bool
733 matchesOneOfMany lmatches = sum (map matchCount lmatches) > 1
735 matchCount (L _ (Match _pats _ty (GRHSs grhss _binds))) = length grhss
740 type MixEntry_ = (SrcSpan, [OccName], BoxLabel)
742 -- For the hash value, we hash everything: the file name,
743 -- the timestamp of the original source file, the tab stop,
744 -- and the mix entries. We cheat, and hash the show'd string.
745 -- This hash only has to be hashed at Mix creation time,
746 -- and is for sanity checking only.
748 mixHash :: FilePath -> Integer -> Int -> [MixEntry] -> Int
749 mixHash file tm tabstop entries = fromIntegral $ hashString
750 (show $ Mix file tm 0 tabstop entries)