March 2026 - ghc-commits

[Git][ghc/ghc][master] hadrian: remove redundant library/rts ways definitions from stock flavours
by Marge Bot (＠marge-bot) 13 Mar '26

13 Mar '26

Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC Commits: 669d09f9 by Cheng Shao at 2026-03-13T15:06:07-04:00 hadrian: remove redundant library/rts ways definitions from stock flavours This patch removes redundant library/rts ways definitions from stock flavours in hadrian; they can be replaced by applying appropriate filters on `defaultFlavour`. - - - - - 5 changed files: - hadrian/src/Settings/Flavours/Development.hs - hadrian/src/Settings/Flavours/GhcInGhci.hs - hadrian/src/Settings/Flavours/Quick.hs - hadrian/src/Settings/Flavours/QuickCross.hs - hadrian/src/Settings/Flavours/Quickest.hs Changes: ===================================== hadrian/src/Settings/Flavours/Development.hs ===================================== @@ -1,21 +1,15 @@ module Settings.Flavours.Development (developmentFlavour) where -import qualified Data.Set as Set - import Expression import Flavour -import Oracles.Flag import Packages import {-# SOURCE #-} Settings.Default -- Please update doc/flavours.md when changing this file. developmentFlavour :: Stage -> Flavour -developmentFlavour ghcStage = defaultFlavour +developmentFlavour ghcStage = disableDynamicLibs $ disableProfiledLibs $ defaultFlavour { name = "devel" ++ stageString ghcStage , extraArgs = developmentArgs ghcStage <> defaultHaddockExtraArgs - , libraryWays = pure $ Set.fromList [vanilla] - , rtsWays = Set.fromList <$> mconcat [pure [vanilla, debug], targetSupportsThreadedRts ? pure [threaded, threadedDebug]] - , dynamicGhcPrograms = return False , ghcDebugAssertions = (== ghcStage) } where stageString Stage2 = "2" ===================================== hadrian/src/Settings/Flavours/GhcInGhci.hs ===================================== @@ -1,22 +1,14 @@ module Settings.Flavours.GhcInGhci (ghcInGhciFlavour) where -import qualified Data.Set as Set - import Expression import Flavour -import Oracles.Flag import {-# SOURCE #-} Settings.Default -- Please update doc/flavours.md when changing this file. ghcInGhciFlavour :: Flavour -ghcInGhciFlavour = defaultFlavour +ghcInGhciFlavour = disableProfiledLibs $ defaultFlavour { name = "ghc-in-ghci" , extraArgs = ghciArgs - -- We can't build DLLs on Windows (yet). Actually we should only - -- include the dynamic way when we have a dynamic host GHC, but just - -- checking for Windows seems simpler for now. - , libraryWays = pure (Set.fromList [vanilla]) <> pure (Set.fromList [ dynamic | not windowsHost ]) - , rtsWays = pure (Set.fromList [vanilla]) <> (targetSupportsThreadedRts ? pure (Set.fromList [threaded])) <> pure (Set.fromList [ dynamic | not windowsHost ]) } ghciArgs :: Args ===================================== hadrian/src/Settings/Flavours/Quick.hs ===================================== @@ -4,33 +4,16 @@ module Settings.Flavours.Quick ) where -import qualified Data.Set as Set - import Expression import Flavour -import Oracles.Flag import {-# SOURCE #-} Settings.Default -- Please update doc/flavours.md when changing this file. quickFlavour :: Flavour -quickFlavour = defaultFlavour +quickFlavour = disableProfiledLibs $ defaultFlavour { name = "quick" , extraArgs = quickArgs - , libraryWays = Set.fromList <$> - mconcat - [ pure [vanilla] - , notStage0 ? platformSupportsSharedLibs ? pure [dynamic] ] - , rtsWays = Set.fromList <$> - mconcat - [ pure - [ vanilla, debug ] - , targetSupportsThreadedRts ? pure [ threaded, threadedDebug ] - , notStage0 ? platformSupportsSharedLibs ? pure - [ dynamic, debugDynamic ] - , notStage0 ? platformSupportsSharedLibs ? targetSupportsThreadedRts ? pure [ - threadedDynamic, threadedDebugDynamic - ] - ] } + } quickArgs :: Args quickArgs = sourceArgs SourceArgs ===================================== hadrian/src/Settings/Flavours/QuickCross.hs ===================================== @@ -1,33 +1,16 @@ module Settings.Flavours.QuickCross (quickCrossFlavour) where -import qualified Data.Set as Set - import Expression import Flavour -import Oracles.Flag import {-# SOURCE #-} Settings.Default -- Please update doc/flavours.md when changing this file. quickCrossFlavour :: Flavour -quickCrossFlavour = defaultFlavour +quickCrossFlavour = disableProfiledLibs $ defaultFlavour { name = "quick-cross" , extraArgs = quickCrossArgs , dynamicGhcPrograms = pure False - , libraryWays = Set.fromList <$> - mconcat - [ pure [vanilla] - , notStage0 ? platformSupportsSharedLibs ? pure [dynamic] ] - , rtsWays = Set.fromList <$> - mconcat - [ pure - [ vanilla, debug ] - , targetSupportsThreadedRts ? pure [threaded, threadedDebug] - , notStage0 ? platformSupportsSharedLibs ? pure - [ dynamic, debugDynamic ] - , notStage0 ? platformSupportsSharedLibs ? targetSupportsThreadedRts ? pure [ - threadedDynamic, threadedDebugDynamic - ] - ] } + } quickCrossArgs :: Args quickCrossArgs = sourceArgs SourceArgs ===================================== hadrian/src/Settings/Flavours/Quickest.hs ===================================== @@ -1,20 +1,15 @@ module Settings.Flavours.Quickest (quickestFlavour) where -import qualified Data.Set as Set - import Expression import Flavour -import Oracles.Flag import {-# SOURCE #-} Settings.Default -- Please update doc/flavours.md when changing this file. quickestFlavour :: Flavour -quickestFlavour = defaultFlavour +quickestFlavour = disableDynamicLibs $ disableProfiledLibs $ defaultFlavour { name = "quickest" , extraArgs = quickestArgs - , libraryWays = pure (Set.fromList [vanilla]) - , rtsWays = pure (Set.fromList [vanilla]) <> (targetSupportsThreadedRts ? pure (Set.fromList [threaded])) - , dynamicGhcPrograms = return False } + } quickestArgs :: Args quickestArgs = sourceArgs SourceArgs View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/669d09f950a6e88b903d9fd8a757153… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/669d09f950a6e88b903d9fd8a757153… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][master] DmdAnal: Take stable unfoldings into account when determining argument demands
by Marge Bot (＠marge-bot) 13 Mar '26

13 Mar '26

Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC Commits: 870243e4 by Zubin Duggal at 2026-03-12T17:33:28+05:30 DmdAnal: Take stable unfoldings into account when determining argument demands Previously, demand analysis only looked at the RHS to compute argument demands. If the optimised RHS discarded uses of an argument that the stable unfolding still needed, it would be incorrectly marked absent. Worker/wrapper would then replace it with LitRubbish, and inlining the stable unfolding would use the rubbish value, causing a segfault. To fix, we introduce addUnfoldingDemands which analyses the stable unfolding with dmdAnal and combines its DmdType with the RHS's via the new `maxDmdType` which combines the demands of the stable unfolding with the rhs, so we can avoid any situation where we give an absent demand to something which is still used by the stable unfolding. Fixes #26416. - - - - - 8 changed files: - compiler/GHC/Core/Opt/DmdAnal.hs - compiler/GHC/Types/Demand.hs - testsuite/tests/dmdanal/should_compile/T18894.stderr - + testsuite/tests/dmdanal/should_run/M1.hs - + testsuite/tests/dmdanal/should_run/T26416.hs - + testsuite/tests/dmdanal/should_run/T26416.stdout - testsuite/tests/dmdanal/should_run/all.T - testsuite/tests/dmdanal/sigs/T21081.stderr Changes: ===================================== compiler/GHC/Core/Opt/DmdAnal.hs ===================================== @@ -23,7 +23,7 @@ import GHC.Core.DataCon import GHC.Core.Utils import GHC.Core.TyCon import GHC.Core.Type -import GHC.Core.FVs ( rulesRhsFreeIds, bndrRuleAndUnfoldingIds ) +import GHC.Core.FVs ( rulesRhsFreeIds, bndrRuleAndUnfoldingIds, idRuleVars ) import GHC.Core.Coercion ( Coercion ) import GHC.Core.TyCo.FVs ( coVarsOfCos ) import GHC.Core.TyCo.Compare ( eqType ) @@ -1106,9 +1106,22 @@ dmdAnalRhsSig top_lvl rec_flag env let_sd id rhs rhs_sd = mkCalledOnceDmds ww_arity adjusted_body_sd WithDmdType rhs_dmd_ty rhs' = dmdAnal env rhs_sd rhs - DmdType rhs_env rhs_dmds = rhs_dmd_ty - (final_rhs_dmds, final_rhs) = finaliseArgBoxities env id ww_arity - rhs_dmds (de_div rhs_env) rhs' + + -- See Note [Absence analysis for stable unfoldings and RULES], Wrinkle (W3) + full_dmd_ty = addUnfoldingDemands env rhs_sd id rhs_dmd_ty + DmdType full_rhs_env combined_rhs_dmds = full_dmd_ty + + final_rhs_dmds = finaliseArgBoxities env id ww_arity + combined_rhs_dmds (de_div full_rhs_env) rhs' + + -- Attach the final demands to the lambda binders of the RHS. + -- IMPORTANT: The lambda binders of final_rhs must carry the final demand + -- info, because worker/wrapper drives decisions from the idDemandInfo on + -- the lambdas (see mkWwstr_one), NOT from the strictness signature of the + -- function. So the demands must reflect both the unfolding combination + -- (from addUnfoldingDemands) and the boxity finalisation (from + -- finaliseArgBoxities). + final_rhs = setLamDmds final_rhs_dmds rhs' dmd_sig_arity = ww_arity + strictCallArity body_sd sig = mkDmdSigForArity dmd_sig_arity (DmdType sig_env final_rhs_dmds) @@ -1132,19 +1145,51 @@ dmdAnalRhsSig top_lvl rec_flag env let_sd id rhs -- we never get used-once info for FVs of recursive functions. -- See #14816 where we try to get rid of reuseEnv. rhs_env1 = case rec_flag of - Recursive -> reuseEnv rhs_env - NonRecursive -> rhs_env + Recursive -> reuseEnv full_rhs_env + NonRecursive -> full_rhs_env -- See Note [Absence analysis for stable unfoldings and RULES] - rhs_env2 = rhs_env1 `plusDmdEnv` demandRootSet env (bndrRuleAndUnfoldingIds id) + -- The unfolding FVs are already included in full_rhs_env via addUnfoldingDemands. + -- Here we only need demandRoots for RULES. + rhs_env2 = rhs_env1 `plusDmdEnv` demandRootSet env (filterVarSet isId (idRuleVars id)) -- See Note [Lazy and unleashable free variables] !(!sig_env, !weak_fvs) = splitWeakDmds rhs_env2 +setLamDmds :: [Demand] -> CoreExpr -> CoreExpr +-- Attach the demands to the outer lambdas of this expression +setLamDmds (dmd:dmds) (Lam v e) + | isTyVar v = Lam v (setLamDmds (dmd:dmds) e) + | otherwise = Lam (v `setIdDemandInfo` dmd) (setLamDmds dmds e) +setLamDmds dmds (Cast e co) = Cast (setLamDmds dmds e) co + -- This case happens for an OPAQUE function, which may look like + -- f = (\x y. blah) |> co + -- We give it strictness but no boxity (#22502) +setLamDmds _ e = e + -- In the OPAQUE case, the list of demands at this point might be + -- non-empty, e.g., when looking at a PAP. Hence don't panic (#22997). + splitWeakDmds :: DmdEnv -> (DmdEnv, WeakDmds) splitWeakDmds (DE fvs div) = (DE sig_fvs div, weak_fvs) where (!weak_fvs, !sig_fvs) = partitionVarEnv isWeakDmd fvs +-- | If there is a stable unfolding, combine argument demands and free variable +-- demands from the unfolding with those from the RHS. +-- See Note [Absence analysis for stable unfoldings and RULES], Wrinkle (W3). +-- See Note [Combining demands for stable unfoldings] in GHC.Types.Demand. +addUnfoldingDemands :: AnalEnv -> SubDemand -> Id -> DmdType -> DmdType +addUnfoldingDemands env rhs_sd id rhs_dmd_ty + | isStableUnfolding unf + , Just unf_body <- maybeUnfoldingTemplate unf + , let WithDmdType unf_dmd_ty _ = dmdAnal env rhs_sd unf_body + = -- pprTrace "addUnfoldingDemands" (ppr id $$ ppr rhs_dmd_ty $$ ppr unf_dmd_ty) $ + maxDmdType rhs_dmd_ty unf_dmd_ty + + | otherwise + = rhs_dmd_ty -- No stable unfolding, nothing to do + where + unf = realIdUnfolding id + -- | The result type after applying 'idArity' many arguments. Returns 'Nothing' -- when the type doesn't have exactly 'idArity' many arrows. resultType_maybe :: Id -> Maybe Type @@ -1482,10 +1527,21 @@ and transform to Now if f is subsequently inlined, we'll use 'g' and ... disaster. -SOLUTION: if f has a stable unfolding, treat every free variable as a -/demand root/, that is: Analyse it as if it was a variable occurring in a +SOLUTION for stable unfoldings: in `dmdAnalRhsSig`, if the function has a +stable unfolding, analyse it with `dmdAnal` and combine the resulting `DmdType` +with the RHS's `DmdType`. This is done by `addUnfoldingDemands`, which uses +`maxDmdType` to combine both argument demands and free variable demands. +See Note [Combining demands for stable unfoldings] in GHC.Types.Demand for +details of the combining operation. + +This handles both the free variables and arguments of stable unfoldings in one +go. For example, in the scenario above, the unfolding's `DmdType` will mention +`g` as a free variable, so `maxDmdType` will keep it alive. + +SOLUTION for RULES: treat every Id free in the RHS of a RULE as a +/demand root/, that is: analyse it as if it was a variable occurring in a 'topDmd' context. This is done in `demandRoot` (which we also use for exported -top-level ids). Do the same for Ids free in the RHS of any RULES for f. +top-level ids). Wrinkles: @@ -1502,7 +1558,7 @@ Wrinkles: this, that actually happened in practice. (W2) You might wonder why we don't simply take the free vars of the - unfolding/RULE and map them to topDmd. The reason is that any of the free vars + RULE and map them to topDmd. The reason is that any of the free vars might have demand signatures themselves that in turn demand transitive free variables and that we hence need to unleash! This came up in #23208. Consider @@ -1524,6 +1580,24 @@ Wrinkles: for `sg`, failing to unleash the signature and hence observed an absent error instead of the `really important message`. + (W3) The stable unfolding solution above handles /free variables/, but + what about /arguments/? Consider (#26416) + + fromVector :: (Storable a, KnownNat n) => Vector a -> Vector a + fromVector v = ... (uses Storable dictionary) ... + {-# INLINABLE fromVector #-} + + Suppose that the optimised RHS of `fromVector` somehow discards the use of + the Storable dictionary, but the stable unfolding still uses it. Then the + demand signature will say that the Storable dictionary argument is absent, + and worker/wrapper will replace it with `LitRubbish`. But when the + worker's unfolding is inlined, it will use that rubbish value as a real + dictionary, leading to a segfault! + + `addUnfoldingDemands` handles this too: since `maxDmdType` combines both + the argument demands and free variable demands from the unfolding's + `DmdType` with the RHS's, argument absence is correctly prevented. + Note [DmdAnal for DataCon wrappers] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We give DataCon wrappers a (necessarily flat) demand signature in @@ -2001,22 +2075,20 @@ positiveTopBudget (MkB n _) = n >= 0 finaliseArgBoxities :: AnalEnv -> Id -> Arity -> [Demand] -> Divergence - -> CoreExpr -> ([Demand], CoreExpr) + -> CoreExpr -> [Demand] -- POSTCONDITION: --- If: (dmds', rhs') = finaliseArgBoxitities ... dmds .. rhs +-- If: dmds' = finaliseArgBoxities ... dmds .. rhs -- Then: -- dmds' is the same as dmds (including length), except for boxity info --- rhs' is the same as rhs, except for dmd info on lambda binders -- NB: For join points, length dmds might be greater than ww_arity +-- NB: rhs is needed only to count visible binders. finaliseArgBoxities env fn ww_arity arg_dmds div rhs -- Check for an OPAQUE function: see Note [OPAQUE pragma] -- In that case, trim off all boxity info from argument demands - -- and demand info on lambda binders -- See Note [The OPAQUE pragma and avoiding the reboxing of arguments] | isOpaquePragma (idInlinePragma fn) - , let trimmed_arg_dmds = map trimBoxity arg_dmds - = (trimmed_arg_dmds, set_lam_dmds trimmed_arg_dmds rhs) + = map trimBoxity arg_dmds -- Check that we have enough visible binders to match the -- ww arity; if not, we won't do worker/wrapper @@ -2027,7 +2099,7 @@ finaliseArgBoxities env fn ww_arity arg_dmds div rhs -- It's a bit of a corner case. Anyway for now we pass on the -- unadulterated demands from the RHS, without any boxity trimming. | ww_arity > count isId bndrs - = (arg_dmds, rhs) + = arg_dmds -- The normal case | otherwise @@ -2036,10 +2108,7 @@ finaliseArgBoxities env fn ww_arity arg_dmds div rhs -- , text "max" <+> ppr max_wkr_args -- , text "dmds before:" <+> ppr (map idDemandInfo (filter isId bndrs)) -- , text "dmds after: " <+> ppr arg_dmds' ]) $ - (arg_dmds', set_lam_dmds arg_dmds' rhs) - -- set_lam_dmds: we must attach the final boxities to the lambda-binders - -- of the function, both because that's kosher, and because CPR analysis - -- uses the info on the binders directly. + arg_dmds' where opts = ae_opts env (bndrs, _body) = collectBinders rhs @@ -2047,8 +2116,11 @@ finaliseArgBoxities env fn ww_arity arg_dmds div rhs arg_triples :: [(Type, StrictnessMark, Demand)] arg_triples = take ww_arity $ - [ (idType bndr, NotMarkedStrict, get_dmd bndr) - | bndr <- bndrs, isRuntimeVar bndr ] + zipWith mk_triple + [ bndr | bndr <- bndrs, isRuntimeVar bndr ] + arg_dmds + where + mk_triple bndr arg_dmd = (idType bndr, NotMarkedStrict, get_dmd arg_dmd) arg_dmds' = ww_arg_dmds ++ map trimBoxity (drop ww_arity arg_dmds) -- If ww_arity < length arg_dmds, the leftover ones @@ -2064,12 +2136,10 @@ finaliseArgBoxities env fn ww_arity arg_dmds div rhs -- This is the budget initialisation step of -- Note [Worker argument budget] - get_dmd :: Id -> Demand - get_dmd bndr + get_dmd :: Demand -> Demand + get_dmd dmd | is_bot_fn = unboxDeeplyDmd dmd -- See Note [Boxity for bottoming functions], | otherwise = dmd -- case (B) - where - dmd = idDemandInfo bndr -- is_bot_fn: see Note [Boxity for bottoming functions] is_bot_fn = div == botDiv @@ -2126,19 +2196,6 @@ finaliseArgBoxities env fn ww_arity arg_dmds div rhs | positiveTopBudget bg_inner' = (bg_inner', dmd') | otherwise = (bg_inner, trimBoxity dmd) - set_lam_dmds :: [Demand] -> CoreExpr -> CoreExpr - -- Attach the demands to the outer lambdas of this expression - set_lam_dmds (dmd:dmds) (Lam v e) - | isTyVar v = Lam v (set_lam_dmds (dmd:dmds) e) - | otherwise = Lam (v `setIdDemandInfo` dmd) (set_lam_dmds dmds e) - set_lam_dmds dmds (Cast e co) = Cast (set_lam_dmds dmds e) co - -- This case happens for an OPAQUE function, which may look like - -- f = (\x y. blah) |> co - -- We give it strictness but no boxity (#22502) - set_lam_dmds _ e = e - -- In the OPAQUE case, the list of demands at this point might be - -- non-empty, e.g., when looking at a PAP. Hence don't panic (#22997). - finaliseLetBoxity :: AnalEnv -> Type -- ^ Type of the let-bound Id ===================================== compiler/GHC/Types/Demand.hs ===================================== @@ -23,6 +23,8 @@ module GHC.Types.Demand ( lubCard, lubDmd, lubSubDmd, -- *** Greatest lower bound glbCard, + -- *** Maximum (glb on strictness, lub on usage) + maxCard, maxDmd, -- *** Plus plusCard, plusDmd, plusSubDmd, -- *** Multiply @@ -49,13 +51,13 @@ module GHC.Types.Demand ( -- * Demand environments DmdEnv(..), addVarDmdEnv, mkTermDmdEnv, nopDmdEnv, plusDmdEnv, plusDmdEnvs, - multDmdEnv, reuseEnv, + lubDmdEnv, multDmdEnv, reuseEnv, -- * Demand types DmdType(..), dmdTypeDepth, -- ** Algebra nopDmdType, botDmdType, - lubDmdType, plusDmdType, multDmdType, discardArgDmds, + lubDmdType, maxDmdType, plusDmdType, multDmdType, discardArgDmds, -- ** Other operations peelFV, findIdDemand, addDemand, splitDmdTy, deferAfterPreciseException, @@ -864,6 +866,89 @@ lubSubDmd sd1@Poly{} sd2 = lubSubDmd sd2 sd1 -- Otherwise (Call `lub` Prod) return Top lubSubDmd _ _ = topSubDmd +{- Note [Combining demands for stable unfoldings] +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +When a function has a stable unfolding, the optimised RHS and the unfolding +may have different demand signatures for the same arguments. This can happen +because: + + * The optimised RHS may have had transformations applied that reveal + strictness (e.g., inlining exposes a case on an argument). + Example: + RHS: x + Unfolding: head [x] + It's clear that the RHS is strict in `x`, but the demand analyser won't + spot that when it analyses the unfolding. + + * The optimised RHS may have had transformations applied that drop usage + (e.g., a rewrite rule fires that doesn't use an argument, or a seq on + a dictionary is dropped because dictionaries are known to terminate). + Example: + RHS: a + Unfolding: fst g + where `g` is in scope as `g = (a,b)`. + +See Note [Absence analysis for stable unfoldings and RULES] in +GHC.Core.Opt.DmdAnal for the broader context. + +When we inline the stable unfolding at a call site, we get the unfolding's +behaviour, not the RHS's. So we must be conservative and combine the demands: + + * For strictness (lower bounds): we can take the MAXIMUM (glb). + If the RHS reveals that an argument is strict, that strictness was + always there semantically - the analysis just couldn't see it in the + unfolding. Sound optimisations never make lazy code strict. + + * For usage (upper bounds): we must take the MAXIMUM (lub). + If the unfolding uses an argument but the RHS doesn't, we must not + mark it absent, or we'll replace it with rubbish that the unfolding + will then try to use, causing a segfault. See #26416. + +So for cardinality bounds [l1..u1] from RHS and [l2..u2] from unfolding, +we compute [max(l1,l2)..max(u1,u2)]. +-} + +-- | Takes the maximum of both the lower and upper bound of two 'Card's. +-- Semantically, this is glb on lower (strictness) and lub on upper (usage). +-- See Note [Combining demands for stable unfoldings]. +maxCard :: Card -> Card -> Card +-- Given Note [Bit vector representation for Card]: +-- * bit 0 (strictness): take AND (glb) - 0 means strict, so 0 wins +-- * bits 1,2 (usage): take OR (lub) - if either uses, result uses +maxCard (Card a) (Card b) = Card ((a .&. b .&. 0b001) .|. ((a .|. b) .&. 0b110)) + +-- | Takes the maximum of both the lower and upper bounds of two 'Demand's. +-- Semantically, glb on lower (strictness) and lub on upper (usage). +-- See Note [Combining demands for stable unfoldings]. +maxDmd :: Demand -> Demand -> Demand +maxDmd BotDmd dmd2 = dmd2 +maxDmd dmd1 BotDmd = dmd1 +maxDmd (n1 :* sd1) (n2 :* sd2) = + maxCard n1 n2 :* maxSubDmd sd1 sd2 + +maxSubDmd :: SubDemand -> SubDemand -> SubDemand +-- Shortcuts for neutral and absorbing elements. +maxSubDmd (Poly Unboxed C_00) sd = sd +maxSubDmd sd (Poly Unboxed C_00) = sd +maxSubDmd sd@(Poly Boxed C_1N) _ = sd +maxSubDmd _ sd@(Poly Boxed C_1N) = sd +-- Prod +maxSubDmd (Prod b1 ds1) (Poly b2 n2) + | let !d = polyFieldDmd b2 n2 + = mkProd (lubBoxity b1 b2) (strictMap (maxDmd d) ds1) +maxSubDmd (Prod b1 ds1) (Prod b2 ds2) + | equalLength ds1 ds2 + = mkProd (lubBoxity b1 b2) (strictZipWith maxDmd ds1 ds2) +-- Handle Call +maxSubDmd (Call n1 sd1) (viewCall -> Just (n2, sd2)) = + mkCall (maxCard n1 n2) (maxSubDmd sd1 sd2) +-- Handle Poly +maxSubDmd (Poly b1 n1) (Poly b2 n2) = Poly (lubBoxity b1 b2) (maxCard n1 n2) +-- Other Poly case by commutativity +maxSubDmd sd1@Poly{} sd2 = maxSubDmd sd2 sd1 +-- Otherwise (Call `max` Prod) return Top +maxSubDmd _ _ = topSubDmd + -- | Denotes '+' on 'Demand'. plusDmd :: Demand -> Demand -> Demand plusDmd AbsDmd dmd2 = dmd2 @@ -1834,6 +1919,26 @@ lubDmdType d1 d2 = DmdType lub_fv lub_ds lub_ds = zipWithEqual lubDmd ds1 ds2 lub_fv = lubDmdEnv fv1 fv2 +-- | Combine two 'DmdType's for stable unfolding analysis. +-- See Note [Combining demands for stable unfoldings]. +maxDmdType :: DmdType -> DmdType -> DmdType +maxDmdType (DmdType fv1 ds1) (DmdType fv2 ds2) + = DmdType combined_fv combined_ds + where + combined_fv = maxDmdEnv fv1 fv2 + combined_ds = go ds1 ds2 + -- If lists have different lengths, keep remaining ds1 (from RHS) + go rhs [] = rhs + go [] _ = [] + go (r:rhs) (u:unfs) = maxDmd r u : go rhs unfs + +-- | See Note [Combining demands for stable unfoldings]. +maxDmdEnv :: DmdEnv -> DmdEnv -> DmdEnv +maxDmdEnv (DE fv1 d1) (DE fv2 d2) = DE combined_fv combined_div + where + combined_fv = plusVarEnv_CD maxDmd fv1 (defaultFvDmd d1) fv2 (defaultFvDmd d2) + combined_div = lubDivergence d1 d2 + discardArgDmds :: DmdType -> DmdEnv discardArgDmds (DmdType fv _) = fv ===================================== testsuite/tests/dmdanal/should_compile/T18894.stderr ===================================== @@ -399,7 +399,8 @@ lvl :: (Int, Int) lvl = case $wg1 2# of { (# ww, ww #) -> (GHC.Types.I# ww, ww) } -- RHS size: {terms: 22, types: 16, coercions: 0, joins: 0/0} -$wh1 [InlPrag=[2]] :: GHC.Prim.Int# -> Int +$wh1 [InlPrag=[2], Dmd=LC(S,!P(L))] + :: GHC.Prim.Int# -> Int [LclId[StrictWorker([])], Arity=1, Str=<1L>, ===================================== testsuite/tests/dmdanal/should_run/M1.hs ===================================== @@ -0,0 +1,17 @@ +-- Short module name is essential, or else f doesn't inline +module M1 where +{-# INLINABLE [2] f #-} +f :: Int -> Int -> Float +f !dummy x = if times dummy 0 x == 1 + then 3.0 else 4.0 + +{-# INLINE [0] times #-} +times :: Int -> Int -> Int -> Int +times dummy 0 x = x `seq` ( 0 + big dummy ) +times _ a b = a * b + +{-# RULES "times" [1] forall dummy x. times dummy 0 x = 0 + big dummy #-} + +big :: Int -> Int +big x = succ . succ . succ . succ . succ . succ . succ . succ . succ $ x +{-# INLINE big #-} ===================================== testsuite/tests/dmdanal/should_run/T26416.hs ===================================== @@ -0,0 +1,3 @@ +module Main where +import M1 ( f ) +main = print (f 19 12) ===================================== testsuite/tests/dmdanal/should_run/T26416.stdout ===================================== @@ -0,0 +1 @@ +4.0 ===================================== testsuite/tests/dmdanal/should_run/all.T ===================================== @@ -35,3 +35,4 @@ test('T22549', normal, compile_and_run, ['-fdicts-strict -fno-specialise']) test('T23208', exit_code(1), multimod_compile_and_run, ['T23208_Lib', 'T23208']) test('T25439', normal, compile_and_run, ['']) test('T26748', normal, compile_and_run, ['']) +test('T26416', [extra_files(['M1.hs'])], multimod_compile_and_run, ['T26416','M1.hs']) ===================================== testsuite/tests/dmdanal/sigs/T21081.stderr ===================================== @@ -62,7 +62,7 @@ T21081.g: <ML> T21081.h: <MP(ML,ML)><1!P(1L)> T21081.h2: <L><1!P(SL)> T21081.i: <1L><1L><MP(ML,ML)> -T21081.j: <1!P(1L,1L)> +T21081.j: <S!P(1L,1L)> T21081.myfoldl: <LC(S,C(1,L))><1L><1L> T21081.snd': <1!P(A,1L)> View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/870243e4f2a24730539f01ee8e3f394… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/870243e4f2a24730539f01ee8e3f394… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/spj-reinstallable-base] More WIP [skip ci]
by Simon Peyton Jones (＠simonpj) 13 Mar '26

13 Mar '26

Simon Peyton Jones pushed to branch wip/spj-reinstallable-base at Glasgow Haskell Compiler / GHC Commits: 13d7132f by Simon Peyton Jones at 2026-03-13T17:44:24+00:00 More WIP [skip ci] - - - - - 12 changed files: - compiler/GHC/Builtin/Names.hs - compiler/GHC/Builtin/Names/TH.hs - compiler/GHC/Builtin/Utils.hs - compiler/GHC/Hs/Type.hs - compiler/GHC/HsToCore/Monad.hs - compiler/GHC/HsToCore/Types.hs - compiler/GHC/Iface/Binary.hs - compiler/GHC/Iface/Load.hs - compiler/GHC/Iface/Type.hs - compiler/GHC/IfaceToCore.hs - compiler/GHC/Types/Name.hs - compiler/GHC/Unit/External.hs Changes: ===================================== compiler/GHC/Builtin/Names.hs ===================================== @@ -37,7 +37,8 @@ the big-num package or (for plugins) the ghc package. It's not necessary to know the uniques for these guys, only their names -Note [Known-key names] +Note [Overview of +Note [Known-key names] <---- OLD VERSION ~~~~~~~~~~~~~~~~~~~~~~ It is *very* important that the compiler gives wired-in things and things with "known-key" names the correct Uniques wherever they @@ -189,7 +190,7 @@ wired in ones are defined in GHC.Builtin.Types etc. basicKnownKeyOccs :: [(OccName, Unique)] basicKnownKeyOccs - = [ ("Rational", rationalTyConKey) ] + = [ (mkTcOcc "Rational", rationalTyConKey) ] basicKnownKeyNames :: [Name] -- See Note [Known-key names] basicKnownKeyNames ===================================== compiler/GHC/Builtin/Names/TH.hs ===================================== @@ -8,10 +8,10 @@ module GHC.Builtin.Names.TH where import GHC.Prelude () -oimport GHC.Builtin.Names( mk_known_key_name ) +import GHC.Builtin.Names( mk_known_key_name ) import GHC.Unit.Types import GHC.Types.Name( Name ) -import GHC.Types.Name.Occurrence( tcName, clsName, dataName, varName, fieldName ) +import GHC.Types.Name.Occurrence( OccName, tcName, clsName, dataName, varName, fieldName ) import GHC.Types.Name.Reader( RdrName, nameRdrName ) import GHC.Types.Unique ( Unique ) import GHC.Builtin.Uniques ===================================== compiler/GHC/Builtin/Utils.hs ===================================== @@ -1,4 +1,4 @@ -oo{- +{- (c) The GRASP/AQUA Project, Glasgow University, 1992-1998 -} @@ -28,7 +28,7 @@ module GHC.Builtin.Utils ( -- if you find yourself wanting to look at it you might consider using -- 'lookupKnownKeyName' or 'isKnownKeyName'. knownKeyNames, - knownKeyOccMap, + KnownKeyOccMap, knownKeyOccMap, -- * Miscellaneous wiredInIds, ghcPrimIds, @@ -54,7 +54,7 @@ import GHC.Builtin.PrimOps.Ids import GHC.Builtin.Types import GHC.Builtin.Types.Literals ( typeNatTyCons ) import GHC.Builtin.Types.Prim -import GHC.Builtin.Names.TH ( templateHaskellNames ) +import GHC.Builtin.Names.TH ( templateHaskellNames, templateHaskellOccs ) import GHC.Builtin.Names import GHC.Core.ConLike ( ConLike(..) ) @@ -205,6 +205,9 @@ isKnownKeyName :: Name -> Bool isKnownKeyName n = isJust (knownUniqueName $ nameUnique n) || elemUFM n knownKeysMap +type KnownKeyOccMap = OccEnv Name + -- See Note [Overview of known-key Names] + -- | `knownKeyOccMap` maps the OccName of a known-key to its Unique knownKeyOccMap :: OccEnv Unique knownKeyOccMap = mkOccEnv (basicKnownKeyOccs ++ templateHaskellOccs) ===================================== compiler/GHC/Hs/Type.hs ===================================== @@ -117,7 +117,6 @@ import GHC.Core.Ppr ( pprOccWithTick) import GHC.Core.Type import GHC.Core.Multiplicity( pprArrowWithMultiplicity ) import GHC.Hs.Doc -import GHC.Hs.Lit (pprHsStringLit) import GHC.Generics (Generic, Generically(..)) import GHC.Types.Basic import GHC.Types.SrcLoc ===================================== compiler/GHC/HsToCore/Monad.hs ===================================== @@ -427,8 +427,8 @@ mkDsEnvs unit_env mod rdr_env type_env fam_inst_env ptc msg_var cc_st_var dsToIfL :: IfL a -> DsM a -- Run an Iface action in the Ds monad dsToIfl iface_action - = { env <- getGblEnv - ; setEnvs (ds_if_env env) iface_action } + = do { env <- getGblEnv + ; setEnvs (ds_if_env env) iface_action } {- @@ -561,7 +561,17 @@ dsLookupKnownKey occ then dsToIfL $ lookupImportedKnownKey occ else - do { + lookupKnownKeyOcc occ + } + +dsLookupKnownKeyOcc :: OccName -> DsM TyThing +-- Look up the known-key OccName in the current top-level GlobalRdrEnv +-- If we get a unique hit, use it; if not, panic. +dsLookupKnownKeyOcc occ + = do { gbl_rdr_env <- dsGetGlobalRdrEnv + ; case lookupGRE gbl_rdr_env (lookupOccName occ SameNameSpace) of + [name] -> dsLookupGlobal name + gres -> pprPanic "lookupKnownKeyOcc" (ppr occ $$ ppr gres) } dsLookupKnownKeyTyCon :: Name -> DsM TyCon dsLookupKnownKeyTyCon name ===================================== compiler/GHC/HsToCore/Types.hs ===================================== @@ -60,9 +60,11 @@ data DsGblEnv = DsGblEnv { ds_mod :: Module -- For SCC profiling , ds_fam_inst_env :: FamInstEnv -- Like tcg_fam_inst_env - , ds_gbl_rdr_env :: GlobalRdrEnv -- needed only for the following reasons: - -- - to know what newtype constructors are in scope - -- - to check whether all members of a COMPLETE pragma are in scope + , ds_gbl_rdr_env :: GlobalRdrEnv + -- The GlobalRdrEnv is needed for the following reasons: + -- - to know what newtype constructors are in scope + -- - to check whether all members of a COMPLETE pragma are in scope + -- - when looking up know-key names , ds_name_ppr_ctx :: NamePprCtx , ds_msgs :: IORef (Messages DsMessage) -- Diagnostic messages , ds_if_env :: (IfGblEnv, IfLclEnv) -- Used for looking up global, ===================================== compiler/GHC/Iface/Binary.hs ===================================== @@ -32,23 +32,29 @@ module GHC.Iface.Binary ( import GHC.Prelude -import GHC.Builtin.Utils ( isKnownKeyName, lookupKnownKeyName ) -import GHC.Unit -import GHC.Unit.Module.ModIface -import GHC.Types.Name -import GHC.Platform.Profile -import GHC.Types.Unique.FM +import GHC.Builtin.Utils ( knownKeyOccMap, isKnownKeyName, lookupKnownKeyName ) + import GHC.Utils.Panic import GHC.Utils.Binary as Binary -import GHC.Data.FastMutInt -import GHC.Types.Unique import GHC.Utils.Outputable -import GHC.Types.Name.Cache + +import GHC.Types.Name +import GHC.Types.Unique.FM +import GHC.Types.Unique import GHC.Types.SrcLoc +import GHC.Types.Name.Cache + +import GHC.Unit +import GHC.Unit.Module.ModIface + +import GHC.Platform.Profile import GHC.Platform import GHC.Settings.Constants import GHC.Iface.Type (IfaceType(..), getIfaceType, putIfaceType, ifaceTypeSharedByte) +import GHC.Data.FastMutInt +import GHC.Data.Maybe( orElse ) + import Control.Monad import Data.Array import Data.Array.IO @@ -658,17 +664,18 @@ putSymbolTable bh name_count symtab = do getSymbolTable :: ReadBinHandle -> NameCache -> IO (SymbolTable Name) -- Create an array of Names for the symbols and add them to the NameCache -getSymbolTable bh name_cache = do +getSymbolTable bh name_cache = updateNameCache' name_cache $ \cache0 -> do { sz <- get bh :: IO Int ; mut_arr <- newArray_ (0, sz-1) :: IO (IOArray Int Name) - ; cache <- foldGet' (fromIntegral sz) bh cache0 deserialise_one + ; cache <- foldGet' (fromIntegral sz) bh cache0 (deserialise_one mut_arr) ; arr <- unsafeFreeze mut_arr - ; return (cache, arr) } + ; return (cache, arr) } where - deserialise_one :: Word -> (Unit, ModuleName, OccName, Bool) + deserialise_one :: (IOArray Int Name) + -> Word -> (Unit, ModuleName, OccName, Bool) -> OrigNameCache -> IO OrigNameCache - deserialise_one i (uid, mod_name, occ, is_known_key) cache + deserialise_one mut_arr i (uid, mod_name, occ, is_known_key) cache = case lookupOrigNameCache cache mod occ of Just name -> do { writeArray mut_arr (fromIntegral i) name @@ -692,15 +699,8 @@ getSymbolTable bh name_cache = do serialiseName :: WriteBinHandle -> Name -> UniqFM key (Int,Name) -> IO () serialiseName bh name _ - = assertPpr (isExternalName name) (ppr name) $ - put_ bh (moduleUnit mod, moduleName mod, nameOccName name, is_known_key) - where - (omod, is_known_key) - = case name of - WiredIn mod _ _ -> (mod,False) - External mod -> (mod,False) - KnownKey mod -> (mod,True) - _ -> pprPanic "serialiseName" (ppr name) + | (mod, occ, is_known_key) <- extNamePieces name + = put_ bh (moduleUnit mod, moduleName mod, occ, is_known_key) -- Note [Symbol table representation of names] -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ===================================== compiler/GHC/Iface/Load.hs ===================================== @@ -184,17 +184,23 @@ loadKnownKeyOccMap -- We don't have a KnownKeyOccMap yet, so created it -- from the interface file for KnownKeyName - do { iface <- loadSrcInterface (text "lookupImportedKnownKey") - kNOWN_KEY_NAMES - NotBoot NoPkgQual + do { hsc_env <- getTopEnv + ; mb_res <- liftIO $ findImportedModule hsc_env kNOWN_KEY_NAMES NoPkgQual + ; iface <- case mb_res of + Found _ mod -> loadInterfaceWithException doc mod ImportBySystem + _ -> panic "loadKnownKeyOccMap" -- ToDo tidy up + ; let occ_map :: KnownKeyOccMap occ_map = mkOccEnv [ (getOccName nm, nm) - | nm <- availNames (mi_exports iface) ] + | avail <- mi_exports iface + , nm <- availNames avail ] -- Record the KnownKeyOccMap in the EPS, so we will find it next time ; updateEps_ (\eps -> eps { eps_known_keys = Just occ_map }) ; return occ_map } } } + where + doc = text "Need interface for KnonwKeyNames" importDecl :: Name -> IfM lcl (MaybeErr IfaceMessage TyThing) -- Get the TyThing for this Name from an interface file ===================================== compiler/GHC/Iface/Type.hs ===================================== @@ -121,6 +121,21 @@ newtype IfLclName = IfLclName { getIfLclName :: LexicalFastString } deriving (Eq, Ord, Show) +data IfaceBndr -- Local (non-top-level) binders + = IfaceIdBndr {-# UNPACK #-} !IfaceIdBndr + | IfaceTvBndr {-# UNPACK #-} !IfaceTvBndr + deriving (Eq, Ord) + +type IfaceIdBndr = (IfaceType, IfLclName, IfaceType) -- (multiplicity, name, type) +type IfaceTvBndr = (IfLclName, IfaceKind) + +type IfaceLamBndr = (IfaceBndr, IfaceOneShot) + +data IfaceOneShot -- See Note [Preserve OneShotInfo] in "GHC.Core.Tidy" + = IfaceNoOneShot -- and Note [oneShot magic] in "GHC.Types.Id.Make" + | IfaceOneShot + + ifLclNameFS :: IfLclName -> FastString ifLclNameFS = getLexicalFastString . getIfLclName @@ -141,12 +156,6 @@ ifaceBndrType :: IfaceBndr -> IfaceType ifaceBndrType (IfaceIdBndr (_, _, t)) = t ifaceBndrType (IfaceTvBndr (_, t)) = t -type IfaceLamBndr = (IfaceBndr, IfaceOneShot) - -data IfaceOneShot -- See Note [Preserve OneShotInfo] in "GHC.Core.Tidy" - = IfaceNoOneShot -- and Note [oneShot magic] in "GHC.Types.Id.Make" - | IfaceOneShot - instance Outputable IfaceOneShot where ppr IfaceNoOneShot = text "NoOneShotInfo" ppr IfaceOneShot = text "OneShot" ===================================== compiler/GHC/IfaceToCore.hs ===================================== @@ -23,7 +23,6 @@ module GHC.IfaceToCore ( tcIfaceAnnotations, tcIfaceCompleteMatches, tcIfaceExpr, -- Desired by HERMIT (#7683) tcIfaceGlobal, - tcifaceKnownKey, tcIfaceOneShot, tcTopIfaceBindings, tcIfaceImport, hydrateCgBreakInfo @@ -2037,9 +2036,6 @@ tcIfaceOneShot IfaceOneShot = OneShotLam ************************************************************************ -} -tcIfaceKnownKey :: OcName -> IfL TyThing -tcIfaceKownKey - tcIfaceGlobal :: Name -> IfL TyThing tcIfaceGlobal name | Just thing <- wiredInNameTyThing_maybe name ===================================== compiler/GHC/Types/Name.hs ===================================== @@ -51,7 +51,7 @@ module GHC.Types.Name ( -- ** Manipulating and deconstructing 'Name's nameUnique, setNameUnique, - nameOccName, nameNameSpace, nameModule, nameModule_maybe, + nameOccName, nameNameSpace, nameModule, nameModule_maybe, extNamePieces, setNameLoc, tidyNameOcc, localiseName, @@ -317,10 +317,6 @@ isWiredIn = isWiredInName . getName isKnownKey :: NamedThing thing => thing -> Bool isKnownKey = isKnownKeyName' . getName -knownKeyTyThing_maybe :: Name -> Maybe TyThing -knownKeyTyThing_maybe (Name {n_sort = KnownKey m}) = Just m -knownKeyTyThing_maybe _ = Nothing - wiredInNameTyThing_maybe :: Name -> Maybe TyThing wiredInNameTyThing_maybe (Name {n_sort = WiredIn _ thing _}) = Just thing wiredInNameTyThing_maybe _ = Nothing @@ -390,10 +386,17 @@ nameModule name = nameModule_maybe :: Name -> Maybe Module nameModule_maybe (Name { n_sort = External mod}) = Just mod -nameModule_maybe (Name { n_nort = KnownKey mod}) = Just mod +nameModule_maybe (Name { n_sort = KnownKey mod}) = Just mod nameModule_maybe (Name { n_sort = WiredIn mod _ _}) = Just mod nameModule_maybe _ = Nothing +extNamePieces :: Name -> (Module, OccName, Bool) +-- Get the pieces of an external name, ready to serialise +extNamePieces (Name { n_occ = occ, n_sort = External mod}) = (mod, occ, False) +extNamePieces (Name { n_occ = occ, n_sort = WiredIn mod _ _}) = (mod, occ, False) +extNamePieces (Name { n_occ = occ, n_sort = KnownKey mod}) = (mod, occ, True) +extNamePieces name = pprPanic "extNamePieces" (ppr name) + is_interactive_or_from :: Module -> Module -> Bool is_interactive_or_from from mod = from == mod || isInteractiveModule mod @@ -558,17 +561,8 @@ mkExternalName uniq mod occ loc = Name { n_uniq = uniq, n_sort = External mod, n_occ = occ, n_loc = loc } -mkExternalName :: Unique -> Module -> OccName -> SrcSpan -> Name -{-# INLINE mkExternalName #-} --- WATCH OUT! External Names should be in the Name Cache --- (see Note [The Name Cache] in GHC.Iface.Env), so don't just call mkExternalName --- with some fresh unique without populating the Name Cache -mkExternalName uniq mod occ loc - = Name { n_uniq = uniq, n_sort = External mod, - n_occ = occ, n_loc = loc } - mkKnownKeyName :: Unique -> Module -> OccName -> SrcSpan -> Name -{-# INLINE mkKnonwKeyName #-} +{-# INLINE mkKnownKeyName #-} mkKnownKeyName uniq mod occ loc = Name { n_uniq = uniq, n_sort = KnownKey mod, n_occ = occ, n_loc = loc } @@ -647,7 +641,7 @@ stableNameCmp (Name { n_sort = s1, n_occ = occ1 }) sort_cmp (External {}) _ = LT sort_cmp (KnownKey {}) (External {}) = GT - sort_cmp (KnownKey m1) (External m2) = m1 `stableModuleCmp` m2 + sort_cmp (KnownKey m1) (KnownKey m2) = m1 `stableModuleCmp` m2 sort_cmp (KnownKey {}) _ = LT sort_cmp (WiredIn {}) (External {}) = GT ===================================== compiler/GHC/Unit/External.hs ===================================== @@ -21,6 +21,8 @@ import GHC.Prelude import GHC.Unit import GHC.Unit.Module.ModIface +import GHC.Builtin.Utils( KnownKeyOccMap) + import GHC.Core.FamInstEnv import GHC.Core.InstEnv ( InstEnv, emptyInstEnv ) import GHC.Core.Opt.ConstantFold @@ -48,9 +50,6 @@ type PackageCompleteMatches = CompleteMatches type PackageIfaceTable = ModuleEnv ModIface -- Domain = modules in the imported packages -type KnownKeyOccMap = OccEnv Name - -- See Note [Overview of KnownKeyNames] - -- | Constructs an empty PackageIfaceTable emptyPackageIfaceTable :: PackageIfaceTable emptyPackageIfaceTable = emptyModuleEnv @@ -80,6 +79,7 @@ initExternalPackageState = EPS , eps_rule_base = mkRuleBase builtinRules , -- Initialise the EPS rule pool with the built-in rules eps_mod_fam_inst_env = emptyModuleEnv + , eps_known_keys = Nothing , eps_complete_matches = [] , eps_ann_env = emptyAnnEnv , eps_stats = EpsStats View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/13d7132f7e424077af9bd90f8081cb1… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/13d7132f7e424077af9bd90f8081cb1… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc] Pushed new branch wip/mangoiv/fallback-nix-darwin
by Magnus (＠MangoIV) 13 Mar '26

13 Mar '26

Magnus pushed new branch wip/mangoiv/fallback-nix-darwin at Glasgow Haskell Compiler / GHC -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/mangoiv/fallback-nix-darwin You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/T26548] 91 commits: ci: remove unused hlint-ghc-and-base job definition
by Simon Peyton Jones (＠simonpj) 13 Mar '26

13 Mar '26

Simon Peyton Jones pushed to branch wip/T26548 at Glasgow Haskell Compiler / GHC Commits: 4157160f by Cheng Shao at 2026-02-13T06:27:04-05:00 ci: remove unused hlint-ghc-and-base job definition This patch removes the unused `hlint-ghc-and-base` job definition, it's never run since !9806. Note that hadrian lint rules still work locally, so anyone that wishes to run hlint on the codebase can continue to do so in their local worktree. - - - - - 039f1977 by Cheng Shao at 2026-02-13T06:27:47-05:00 wasm: use import.meta.main for proper distinction of nodejs main modules This patch uses `import.meta.main` for proper distinction of nodejs main modules, especially when the main module might be installed as a symlink. Fixes #26916. - - - - - 14f485ee by ARATA Mizuki at 2026-02-17T09:09:24+09:00 Support more x86 extensions: AVX-512 {BW,DQ,VL} and GFNI Also, mark AVX-512 ER and PF as deprecated. AVX-512 instructions can be used for certain 64-bit integer vector operations. GFNI can be used to implement bitReverse (currently not used by NCG, but LLVM may use it). Closes #26406 Addresses #26509 - - - - - 016f79d5 by fendor at 2026-02-17T09:16:16-05:00 Hide implementation details from base exception stack traces Ensure we hide the implementation details of the exception throwing mechanisms: * `undefined` * `throwSTM` * `throw` * `throwIO` * `error` The `HasCallStackBacktrace` should always have a length of exactly 1, not showing internal implementation details in the stack trace, as these are vastly distracting to end users. CLC proposal [#387](https://github.com/haskell/core-libraries-committee/issues/387) - - - - - 4f2840f2 by Brian J. Cardiff at 2026-02-17T17:04:08-05:00 configure: Accept happy-2.2 In Jan 2026 happy-2.2 was released. The most sensible change is https://github.com/haskell/happy/issues/335 which didn't trigger in a fresh build - - - - - 10b4d364 by Duncan Coutts at 2026-02-17T17:04:52-05:00 Fix errors in the documentation of the eventlog STOP_THREAD status codes Fix the code for BlockedOnMsgThrowTo. Document all the known historical warts. Fixes issue #26867 - - - - - c5e15b8b by Phil de Joux at 2026-02-18T05:07:36-05:00 haddock: use snippets for all list examples - generate snippet output for docs - reduce font size to better fit snippets - Use only directive to guard html snippets - Add latex snippets for lists - - - - - d388bac1 by Phil de Joux at 2026-02-18T05:07:36-05:00 haddock: Place the snippet input and output together - Put the output seemingly inside the example box - - - - - 016fa306 by Samuel Thibault at 2026-02-18T05:08:35-05:00 Fix linking against libm by moving the -lm option For those systems that need -lm for getting math functions, this is currently added on the link line very early, before the object files being linked together. Newer toolchains enable --as-needed by default, which means -lm is ignored at that point because no object requires a math function yet. With such toolchains, we thus have to add -lm after the objects, so the linker actually includes libm in the link. - - - - - 68bd0805 by Teo Camarasu at 2026-02-18T05:09:19-05:00 ghc-internal: Move GHC.Internal.Data.Bool to base This is a tiny module that only defines bool :: Bool -> a -> a -> a. We can just move this to base and delete it from ghc-internal. If we want this functionality there we can just use a case statement or if-then expression. Resolves 26865 - - - - - 4c40df3d by fendor at 2026-02-20T10:24:48-05:00 Add optional `SrcLoc` to `StackAnnotation` class `StackAnnotation`s give access to an optional `SrcLoc` field that user-added stack annotations can use to provide better backtraces in both error messages and when decoding the callstack. We update builtin stack annotations such as `StringAnnotation` and `ShowAnnotation` to also capture the `SrcLoc` of the current `CallStack` to improve backtraces by default (if stack annotations are used). This change is backwards compatible with GHC 9.14.1. - - - - - fd9aaa28 by Simon Hengel at 2026-02-20T10:25:33-05:00 docs: Fix grammar in explicit_namespaces.rst - - - - - 44354255 by Vo Minh Thu at 2026-02-20T18:53:06-05:00 GHCi: add a :version command. This looks like: ghci> :version GHCi, version 9.11.20240322 This closes #24576. Co-Author: Markus Läll <markus.l2ll(a)gmail.com> - - - - - eab3dbba by Andreas Klebinger at 2026-02-20T18:53:51-05:00 hadrian/build-cabal: Better respect and utilize -j * We now respect -j<n> for the cabal invocation to build hadrian rather than hardcoding -j * We use the --semaphore flag to ensure cabal/ghc build the hadrian executable in parallel using the -jsem mechanism. Saves 10-15s on fresh builds for me. Fixes #26876 - - - - - 17839248 by Teo Camarasu at 2026-02-24T08:36:03-05:00 ghc-internal: avoid depending on GHC.Internal.Control.Monad.Fix This module contains the definition of MonadFix, since we want an instance for IO, that instance requires a lot of machinery and we want to avoid an orphan instance, this will naturally be quite high up in the dependency graph. So we want to avoid other modules depending on it as far as possible. On Windows, the IO manager depends on the RTSFlags type, which transtively depends on MonadFix. We refactor things to avoid this dependency, which would have caused a regression. Resolves #26875 Metric Decrease: T12227 - - - - - fa88d09a by Wolfgang Jeltsch at 2026-02-24T08:36:47-05:00 Refine the imports of `System.IO.OS` Commit 68bd08055594b8cbf6148a72d108786deb6c12a1 replaced the `GHC.Internal.Data.Bool` import by a `GHC.Internal.Base` import. However, while the `GHC.Internal.Data.Bool` import was conditional and partial, the `GHC.Internal.Base` import is unconditional and total. As a result, the import list is not tuned to import only the necessary bits anymore, and furthermore GHC emits a lot of warnings about redundant imports. This commit makes the `GHC.Internal.Base` import conditional and partial in the same way that the `GHC.Internal.Data.Bool` import was. - - - - - c951fef1 by Cheng Shao at 2026-02-25T20:58:28+00:00 wasm: add /assets endpoint to serve user-specified assets This patch adds an `/assets` endpoint to the wasm dyld http server, so that users can also fetch assets from the same host with sensible default MIME types, without needing a separate http server for assets that also introduces CORS headaches: - A `-fghci-browser-assets-dir` driver flag is added to specify the assets root directory (defaults to `$PWD`) - The dyld http server fetches `mime-db` on demand and uses it as source of truth for mime types. Closes #26951. - - - - - dde22f97 by Sylvain Henry at 2026-02-26T13:14:03-05:00 Fix -fcheck-prim-bounds for non constant args (#26958) Previously we were only checking bounds for constant (literal) arguments! I've refactored the code to simplify the generation of out-of-line Cmm code for the primop composed of some inline code + some call to an external Cmm function. - - - - - bd3eba86 by Vladislav Zavialov at 2026-02-27T05:48:01-05:00 Check for negative type literals in the type checker (#26861) GHC disallows negative type literals (e.g., -1), as tested by T8306 and T8412. This check is currently performed in the renamer: rnHsTyLit tyLit@(HsNumTy x i) = do when (i < 0) $ addErr $ TcRnNegativeNumTypeLiteral tyLit However, this check can be bypassed using RequiredTypeArguments (see the new test case T26861). Prior to this patch, such programs caused the compiler to hang instead of reporting a proper error. This patch addresses the issue by adding an equivalent check in the type checker, namely in tcHsType. The diff is deliberately minimal to facilitate backporting. A more comprehensive rework of HsTyLit is planned for a separate commit. - - - - - faf14e0c by Vladislav Zavialov at 2026-02-27T05:48:45-05:00 Consistent pretty-printing of HsString, HsIsString, HsStrTy Factor out a helper to pretty-print string literals, thus fixing newline handling for overloaded string literals and type literals. Test cases: T26860ppr T26860ppr_overloaded T26860ppr_tylit Follow up to ddf1434ff9bb08cfef3c93f23de6b83ec698aa27 - - - - - f108a972 by Arnaud Spiwack at 2026-02-27T12:53:01-05:00 Make list comprehension completely non-linear Fixes #25081 From the note: The usefulness of list comprehension in conjunction with linear types is dubious. After all, statements are made to be run many times, for instance in ```haskell [u | y <- [0,1], stmts] ``` both `u` and `stmts` are going to be run several times. In principle, though, there are some position in a monad comprehension expression which could be considered linear. We could try and make it so that these positions are considered linear by the typechecker, but in practice the desugarer doesn't take enough care to ensure that these are indeed desugared to linear sites. We tried in the past, and it turned out that we'd miss a desugaring corner case (#25772). Until there's a demand for this very specific improvement, let's instead be conservative, and consider list comprehension to be completely non-linear. - - - - - ae799cab by Simon Jakobi at 2026-02-27T12:53:54-05:00 PmAltConSet: Use Data.Set instead of Data.Map ...to store `PmLit`s. The Map was only used to map keys to themselves. Changing the Map to a Set saves a Word of memory per entry. Resolves #26756. - - - - - dcd7819c by Vladislav Zavialov at 2026-02-27T18:46:03-05:00 Drop HsTyLit in favor of HsLit (#26862, #25121) This patch is a small step towards unification of HsExpr and HsType, taking care of literals (HsLit) and type literals (HsTyLit). Additionally, it improves error messages for unsupported type literals, such as unboxed or fractional literals (test cases: T26862, T26862_th). Changes to the AST: * Use HsLit where HsTyLit was previously used * Use HsChar where HsCharTy was previously used * Use HsString where HsStrTy was previously used * Use HsNatural (NEW) where HsNumTy was previously used * Use HsDouble (NEW) to represent unsupported fractional type literals Changes to logic: * Parse unboxed and fractional type literals (to be rejected later) * Drop the check for negative literals in the renamer (rnHsTyLit) in favor of checking in the type checker (tc_hs_lit_ty) * Check for invalid type literals in TH (repTyLit) and report unrepresentable literals with ThUnsupportedTyLit * Allow negative type literals in TH (numTyLit). This is fine as these will be taken care of at splice time (test case: T8306_th) - - - - - c927954f by Vladislav Zavialov at 2026-02-27T18:46:50-05:00 Increase test coverage of diagnostics Add test cases for the previously untested diagnostics: [GHC-01239] PsErrIfInFunAppExpr [GHC-04807] PsErrProcInFunAppExpr [GHC-08195] PsErrInvalidRecordCon [GHC-16863] PsErrUnsupportedBoxedSumPat [GHC-18910] PsErrSemiColonsInCondCmd [GHC-24737] PsErrInvalidWhereBindInPatSynDecl [GHC-25037] PsErrCaseInFunAppExpr [GHC-25078] PsErrPrecedenceOutOfRange [GHC-28021] PsErrRecordSyntaxInPatSynDecl [GHC-35827] TcRnNonOverloadedSpecialisePragma [GHC-40845] PsErrUnpackDataCon [GHC-45106] PsErrInvalidInfixHole [GHC-50396] PsErrInvalidRuleActivationMarker [GHC-63930] MultiWayIfWithoutAlts [GHC-65536] PsErrNoSingleWhereBindInPatSynDecl [GHC-67630] PsErrMDoInFunAppExpr [GHC-70526] PsErrLetCmdInFunAppCmd [GHC-77808] PsErrDoCmdInFunAppCmd [GHC-86934] ClassPE [GHC-90355] PsErrLetInFunAppExpr [GHC-91745] CasesExprWithoutAlts [GHC-92971] PsErrCaseCmdInFunAppCmd [GHC-95644] PsErrBangPatWithoutSpace [GHC-97005] PsErrIfCmdInFunAppCmd Remove unused error constructors: [GHC-44524] PsErrExpectedHyphen [GHC-91382] TcRnIllegalKindSignature - - - - - 3a9470fd by Torsten Schmits at 2026-02-27T18:47:34-05:00 Avoid expensive computation for debug logging in `mergeDatabases` when log level is low This computed and traversed a set intersection for every single dependency unconditionally. - - - - - ea4c2cbd by Brandon Chinn at 2026-02-27T16:22:38-08:00 Implement QualifiedStrings (#26503) See Note [Implementation of QualifiedStrings] - - - - - 08bc245b by sheaf at 2026-03-01T11:11:54-05:00 Clean up join points, casts & ticks This commit shores up the logic dealing with casts and ticks occurring in between a join point binding and a jump. Fixes #26642 #26929 #26693 Makes progress on #14610 #26157 #26422 Changes: - Remove 'GHC.Types.Tickish.TickishScoping' in favour of simpler predicates 'tickishHasNoScope'/'tickishHasSoftScope', as things were before commit 993975d3. This makes the code easier to read and document (fewer indirections). - Introduce 'canCollectArgsThroughTick' for consistent handling of ticks around PrimOps and other 'Id's that cannot be eta-reduced. See overhauled Note [Ticks and mandatory eta expansion]. - New Note [JoinId vs TailCallInfo] in GHC.Core.SimpleOpt that explains robustness of JoinId vs fragility of TailCallInfo. - Allow casts/non-soft-scoped ticks to occur in between a join point binder and a jump, but only in Core Prep. See Note [Join points, casts, and ticks] and Note [Join points, casts, and ticks... in Core Prep] in GHC.Core.Opt.Simplify.Iteration. Also update Core Lint to account for this. See Note [Linting join points with casts or ticks] in GHC.Core.Lint. - Update 'GHC.Core.Utils.mergeCaseAlts' to avoid pushing a cast in between a join point binding and its jumps. This fixes #26642. See the new (MC5) and (MC6) in Note [Merge Nested Cases]. - Update float out to properly handle source note ticks. They are now properly floated out instead of being discarded. This increases the number of ticks in certain tests with -g. Test cases: T26642 and TrickyJoins. Metric increase due to more source note ticks with -g: ------------------------- Metric Increase: libdir size_hello_artifact size_hello_unicode ------------------------- - - - - - 476c4cdf by Sean D. Gillespie at 2026-03-02T10:14:37-05:00 Add SIMD absolute value on x86 and LLVM On x86, absolute value of 32 bits or less is implemented with PABSB/PABSW/PABSD if SSSE3 is available. Otherwise, there is a fallback for SSE2. For 64 bit integers it uses VPABSQ, required by AVX-512VL, with fallbacks for SSE4.2 and SSE2. There is no dedicated instruction for floating point absolute value on x86, so it is simulated using bitwise AND. Absolute value for signed integers and floats are implemented by the "llvm.abs/llvm.fabs" standard library intrinsics. This implementation uses MachOps constructors, unlike non-vector floating point absolute value, which uses CallishMachOps. - - - - - 709448c0 by Sean D. Gillespie at 2026-03-02T10:14:46-05:00 Add SIMD floating point square root On x86, this is implemented with the SQRTPS and SQRTPD instructions. On LLVM, it uses the sqrt library intrinstic. - - - - - 0deadf66 by Sean D. Gillespie at 2026-03-02T10:14:47-05:00 Improve error message for SIMD on aarch64 When encountering vector literals on aarch64, previously it would throw: <no location info>: error: panic! (the 'impossible' happened) GHC version 9.15.20251219: getRegister' (CmmLit:CmmVec): Now it is more consistent with the other vector operations: <no location info>: error: sorry! (unimplemented feature or known bug) GHC version 9.15.20251219: SIMD operations on AArch64 currently require the LLVM backend - - - - - 7d64031b by Vladislav Zavialov at 2026-03-03T11:09:28-05:00 Replace maybeAddSpace with spaceIfSingleQuote Simplify pretty-printing of HsTypes by using spaceIfSingleQuote. This allows us to drop the unwieldy lhsTypeHasLeadingPromotionQuote helper function. Follow-up to 178c1fd830c78377ef5d338406a41e1d8eb5f0da - - - - - 598db847 by Wolfgang Jeltsch at 2026-03-06T06:25:25-05:00 Correct `hIsReadable` and `hIsWritable` for duplex handles This contribution implements CLC proposal #371. It changes `hIsReadable` and `hIsWritable` such that they always throw a respective exception when encountering a closed or semi-closed handle, not just in the case of a file handle. - - - - - b90201e5 by Wolfgang Jeltsch at 2026-03-06T06:25:25-05:00 Document `SemiClosedHandle` - - - - - c9df72b5 by Wolfgang Jeltsch at 2026-03-06T06:25:25-05:00 Tell users what “semi-closed” means for duplex handles - - - - - a8aa1868 by Ilias Tsitsimpis at 2026-03-06T06:26:29-05:00 Fix determinism of linker arguments The switch from Data.Map to UniqMap in 3b5be05ac29 introduced non-determinism in the order of packages passed to the linker. This resulted in non-reproducible builds where the DT_NEEDED entries in dynamic libraries were ordered differently across builds. Fix the regression by explicitly sorting the package list derived from UniqMap. Fixes #26838 - - - - - 9b64ad3a by Matthew Pickering at 2026-03-06T06:27:16-05:00 determinism: Use a deterministic renaming when writing bytecode files Now when writing the bytecode file, a counter and substitution are used to provide deterministic keys to local variables (rather than relying on uniques). This change ensures that `.gbc` are produced deterministically. Fixes #26499 - - - - - d29800e0 by Teo Camarasu at 2026-03-06T06:28:46-05:00 ghc-internal: delete Version hs-boot loop Version has a Read instance which needs Unicode but part of the Unicode interface is the unicode version. This is easy to resolve. We simply don't re-export the version from the Unicode module. Resolves #26940 - - - - - ad25af90 by Sylvain Henry at 2026-03-06T06:30:33-05:00 Linker: implement support for COMMON symbols (#6107) Add some support for COMMON symbols. We don't support common symbols having different sizes where the larger one is allocated after the smaller one. The linker will fail with an appropriate error message if it happens. - - - - - 3b59f158 by Cheng Shao at 2026-03-06T06:31:16-05:00 compiler: fix redundant import of GHC.Hs.Lit This patch removes a redundant import of `GHC.Hs.Lit` which causes a ghc build failure with validate flavours when bootstrapping from 9.14. Fixes #26972. - - - - - 148d36f3 by Cheng Shao at 2026-03-06T06:32:01-05:00 compiler: avoid unneeded traversals in GHC.Unit.State Following !15591, this patch avoids unneeded traversals in `reportCycles`/`reportUnusable` when log verbosity is below given threshold. Also applies `logVerbAtLeast` when appropriate. Co-authored-by: Codex <codex(a)openai.com> - - - - - 7e31367c by Cheng Shao at 2026-03-06T06:32:46-05:00 ghc-internal: fix redundant import in GHC.Internal.Event.Windows.ManagedThreadPool This patch fixes redundant import in `GHC.Internal.Event.Windows.ManagedThreadPool` that causes a compilation error when building windows target with validate flavours and bootstrapping from 9.14. Fixes #26976. - - - - - fc8b8e27 by sheaf at 2026-03-06T06:33:28-05:00 System.Info.fullCompilerVersion: add 'since' annot Fixes #26973 - - - - - c8238375 by Sylvain Henry at 2026-03-06T06:34:23-05:00 Hadrian: deprecate --bignum and automatically enable +native_bignum for JS Deprecate --bignum=... to select the bignum backend. It's only used to select the native backend, and this can be done with the +native_bignum flavour transformer. Additionally, we automatically enable +native_bignum for the JS target because the GMP backend isn't supported. - - - - - a3ac7074 by Sylvain Henry at 2026-03-06T06:35:17-05:00 JS: fix putEnum/fromEnum (#24593) Don't go through Word16 when serializing Enums. - - - - - 0b36e96c by Andreas Klebinger at 2026-03-06T06:35:58-05:00 Docs: Document -fworker-wrapper-cbv default setting. Fixes #26841 - - - - - eca445e7 by mangoiv at 2026-03-07T05:02:36-05:00 drop deb9/10 from CI, add deb13 debian 9 and 10 are end of life, hence we drop them from our CI, but we do add debian 13. Jobs that were previously run on 9 and 10 run on 13, too, jobs that were run on 10, are run on 11 now. Jobs that were previously run on debian 12 are run on debian 13 now. This MR also updates hadrian's bootstrap plans for that reason. Metric Decrease: T9872d - - - - - 12f8b829 by Luite Stegeman at 2026-03-07T05:03:33-05:00 Fix GHC.Internal.Prim haddock Haddock used to parse Haskell source to generate documentation, but switched to using interface files instead. This broke documentation of the GHC.Internal.Prim module, since it's a wired-in interface that didn't provide a document structure. This patch adds the missing document structure and updates genprimopcode to make the section headers and descriptions available. fixes #26954 - - - - - f87e5e57 by Luite Stegeman at 2026-03-07T05:03:33-05:00 Remove obsolete --make-haskell-source from genprimopcode Now that haddock uses the wired-in interface for GHC.Internal.Prim, the generated Haskell source file is no longer needed. Remove the --make-haskell-source code generator from genprimopcode and replace the generated GHC/Internal/Prim.hs with a minimal static source file. - - - - - 4a7ddc7b by Sylvain Henry at 2026-03-07T05:04:59-05:00 JS: fix linking of exposed but non-preload units (#24886) Units exposed in the unit database but not explicitly passed on the command-line were not considered by the JS linker. This isn't an issue for cabal which passes every unit explicitly but it is an issue when using GHC directly (cf T24886 test). - - - - - 689aafcd by mangoiv at 2026-03-07T05:05:52-05:00 testsuite: double foundation timeout multiplier The runtime timeout in the foundation test was regularly hit by code generated by the wasm backend - we increase the timout since the high runtime is expected on the wasm backend for this rather complex test. Resolves #26938 - - - - - a46a1bb1 by Cheng Shao at 2026-03-09T04:50:30-04:00 compiler: add myCapabilityExpr to GHC.Cmm.Utils This commit adds `myCapabilityExpr` to `GHC.Cmm.Utils` which is computed from `BaseReg`. It's convenient for codegen logic where one needs to pass the current Capability's pointer. - - - - - 4afc65b1 by Cheng Shao at 2026-03-09T04:50:30-04:00 compiler: lower tryPutMVar# into a ccall directly This patch addresses an old TODO of `stg_tryPutMVarzh` by removing it completely and making the compiler lower `tryPutMVar#` into a ccall to `performTryPutMVar` directly, without landing into an intermediate C or Cmm function. `performTryPutMVar` is promoted to a public RTS function with default visibility, and the compiler lowering logic takes into account the C ABI of `performTryPutMVar` and converts from C Bool to primop's `Int#` result properly. - - - - - 9e3d6a58 by Simon Hengel at 2026-03-09T04:51:15-04:00 Don't use #line in haddocks This confuses the parser. Haddock output is unaffected by this change. (read: this still produces the same documentation) - - - - - f4e8fec2 by Wolfgang Jeltsch at 2026-03-09T04:52:01-04:00 Remove in-package dependencies on `GHC.Internal.System.IO` This contribution eliminates all dependencies on `GHC.Internal.System.IO` from within `ghc-internal`. It comprises the following changes: * Make `GHC.Internal.Fingerprint` independent of I/O support * Tighten the dependencies of `GHC.Internal.Data.Version` * Tighten the dependencies of `GHC.Internal.TH.Monad` * Tighten the dependencies of `GHCi.Helpers` * Move some code that needs `System.IO` to `template-haskell` * Move the `GHC.ResponseFile` implementation into `base` * Move the `System.Exit` implementation into `base` * Move the `System.IO.OS` implementation into `base` Metric Decrease: size_hello_artifact size_hello_artifact_gzip size_hello_unicode size_hello_unicode_gzip - - - - - 91df4c82 by Sylvain Henry at 2026-03-09T04:53:20-04:00 T18832: fix Windows CI failure by dropping removeDirectoryRecursive On Windows, open file handles prevent deletion. After killThread, the closer thread may not have called hClose yet, causing removeDirectoryRecursive to fail with "permission denied". The test harness cleans up the run directory anyway, so the call is redundant. - - - - - d7fe9671 by Cheng Shao at 2026-03-09T04:54:04-04:00 compiler: fix redundant import in GHC.StgToJS.Object This patch fixes a redundant import in GHC.StgToJS.Object that causes a build failure when compiling head from 9.14 with validate flavours. Fixes #26991. - - - - - 0bfd29c3 by Cheng Shao at 2026-03-09T04:54:46-04:00 wasm: fix `Illegal foreign declaration` failure when ghci loads modules with JSFFI exports This patch fixes a wasm ghci error when loading modules with JSFFI exports; the `backendValidityOfCExport` check in `tcCheckFEType` should only makes sense and should be performed when not checking the JavaScript calling convention; otherwise, when the calling convention is JavaScript, the codegen logic should be trusted to backends that actually make use of it. Fixes #26998. - - - - - e659610c by Duncan Coutts at 2026-03-09T12:08:35-04:00 Apply NOINLINE pragmas to generated Typeable bindings For context, see the existing Note [Grand plan for Typeable] and the Note [NOINLINE on generated Typeable bindings] added in the subsequent commit. This is about reducing the number of exported top level names and unfoldings, which reduces interface file sizes and reduces the number of global/dynamic linker symbols. Also accept the changed test output and metric decreases. Tests that record the phase output for type checking or for simplifier end up with different output: the generated bindings now have an Inline [~] annotation, and many top level names are now local rather than module-prefixed for export. Also accept the numerous metric decreases in compile_time/bytes allocated, and a few in compile_time/max_bytes_used. There's also one instance of a decrease in runtime/max_bytes_used but it's a ghci-way test and so presumably the reason is that it loads smaller .hi files and/or links fewer symbols. ------------------------- Metric Decrease: CoOpt_Singletons MultiLayerModulesTH_OneShot MultilineStringsPerf T10421 T10547 T12150 T12227 T12234 T12425 T13035 T13056 T13253 T13253-spj T15304 T15703 T16875 T17836b T17977b T18140 T18223 T18282 T18304 T18698a T18698b T18730 T18923 T20049 T21839c T24471 T24582 T24984 T3064 T4029 T5030 T5642 T5837 T6048 T9020 T9198 T9961 TcPlugin_RewritePerf WWRec hard_hole_fits mhu-perf ------------------------- - - - - - 67df5161 by Duncan Coutts at 2026-03-09T12:08:35-04:00 Add documentation Note [NOINLINE on generated Typeable bindings] and refer to it from the code and existing documentation. - - - - - c4ad6167 by Duncan Coutts at 2026-03-09T12:08:35-04:00 Switch existing note to "named wrinkle" style, (GPT1)..(GPT7) GPT = Grand plan for Typeable - - - - - dc84f8e2 by Cheng Shao at 2026-03-09T12:09:21-04:00 ci: only build deb13 for validate pipeline aarch64-linux jobs This patch drops the redundant aarch64-linux deb12 job from validate pipelines and only keeps deb13; it's still built in nightly/release pipelines. Closes #27004. - - - - - 23a50772 by Rajkumar Natarajan at 2026-03-10T14:11:37-04:00 chore: Merge GHC.Internal.TH.Quote into GHC.Internal.TH.Monad Move the QuasiQuoter datatype from GHC.Internal.TH.Quote to GHC.Internal.TH.Monad and delete the Quote module. Update submodule template-haskell-quasiquoter to use the merged upstream version that imports from the correct module. Co-authored-by: Cursor <cursoragent(a)cursor.com> - - - - - a2bb6fc3 by Simon Jakobi at 2026-03-10T14:12:23-04:00 Add regression test for #16122 - - - - - 604e1180 by Cheng Shao at 2026-03-11T15:00:42-04:00 hadrian: remove the broken bench flavour This patch removes the bench flavour from hadrian which has been broken for years and not used for actual benchmarking (for which `perf`/`release` is used instead). Closes #26825. - - - - - c3e64915 by Simon Jakobi at 2026-03-11T15:01:31-04:00 Add regression test for #18186 The original TypeInType language extension is replaced with DataKinds+PolyKinds for compatibility. Closes #18186. - - - - - 664996c7 by Andreas Klebinger at 2026-03-11T15:02:16-04:00 Bump nofib submodule. We accrued a number of nofib fixes we want to have here. - - - - - 517cf64e by Simon Jakobi at 2026-03-11T15:03:03-04:00 Add regression test for #15907 Closes #15907. - - - - - fff362cf by Simon Jakobi at 2026-03-11T15:03:49-04:00 Ensure T14272 is run in optasm way Closes #16539. - - - - - ec81ec2c by Simon Jakobi at 2026-03-11T15:03:49-04:00 Add regression test for #24632 Closes #24632. - - - - - cefec47b by Simon Jakobi at 2026-03-11T15:03:50-04:00 Fix module name of T9675: T6975 -> T9675 - - - - - d3690ae8 by Andreas Klebinger at 2026-03-11T15:04:31-04:00 User guide: Clarify phase control on INLINEABLE[foo] pragmas. Fixes #26851 - - - - - e7054934 by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #12694 Closes #12694. - - - - - 4756d9f6 by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #16275 Closes #16275. - - - - - 34b7e2c1 by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #14908 Closes #14908. - - - - - 4243db3d by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #14151 Closes #14151. - - - - - 0e9f1453 by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #12640 Closes #12640. - - - - - ae606c7f by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #15588 Closes #15588. - - - - - 5a38ce4e by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #9445 Closes #9445. - - - - - d054b467 by Cheng Shao at 2026-03-11T15:05:59-04:00 compiler: implement string interning logic for BCONPtrFS This patch adds a `FastStringEnv`-based cache of `MallocStrings` requests to `Interp`, so that when we load bytecode with many breakpoints that share the same module names & unit ids, we reuse the allocated remote pointers instead of issuing duplicte `MallocStrings` requests and bloating the C heap. Closes #26995. - - - - - b85a0293 by Simon Jakobi at 2026-03-11T15:06:41-04:00 Add perf test for #1216 Closes #1216. - - - - - cd7f7420 by Sylvain Henry at 2026-03-11T15:07:58-04:00 JS: check that tuple constructors are linked (#23709) Test js-mk_tup was failing before because tuple constructors weren't linked in. It's no longer an issue after the linker fixes. - - - - - d57f01a4 by Matthew Pickering at 2026-03-11T15:08:40-04:00 testsuite: Add test for foreign import prim with unboxed tuple return This commit just adds a test that foreign import prim works with unboxed sums. - - - - - 23d111ce by Matthew Pickering at 2026-03-11T15:08:41-04:00 Return a valid pointer in advanceStackFrameLocationzh When there is no next stack chunk, `advanceStackFrameLocationzh` used to return NULL in the pointer-typed StackSnapshot# result slot. Even though the caller treats that case as "no next frame", the result is still materialized in a GC-visible pointer slot. If a GC observes the raw NULL there, stack decoding can crash. Fix this by ensuring the dead pointer slot contains a valid closure pointer. Also make the optional result explicit by returning an unboxed sum instead of a tuple with a separate tag. Fixes #27009 - - - - - 4c58a3ae by Cheng Shao at 2026-03-11T15:09:22-04:00 hadrian: build profiled dynamic objects with -dynamic-too This patch enables hadrian to build profiled dynamic objects with `-dynamic-too`, addressing a build parallelism bottleneck in release pipelines. Closes #27010. - - - - - 5a383cdd by Simon Peyton Jones at 2026-03-13T16:19:52+00:00 Fix evaluated-ness bug in Simplifier This fixes #26548, an error which meant that we were failing to attach evaluated-ness flags to case-alternative-bound variables - - - - - fbc77b0b by Simon Peyton Jones at 2026-03-13T16:19:52+00:00 Be a little less eager to inline ---> OtherCon [] = TrivArg OtherCon _ = NonTrivArg Make inlining a tiny bit more eager ---> OtherCon [] = NonTrivArg In particular x = mkSymMCo mco where mco is evaluated. We want that to inline, especially if the let is strict. Makes a significant difference in Rewrite.hs, Test case T9872b OtherCon [] arguments aren't interesting ---> OtherCon [] = TrivArg Remove white space Be a little less keen to inline This commit changes interestingArg to treat lambda as NonTrivArg rather than ValueArg. That makes parser combinators a bit less keen to inline. E.g. <|> p1 p2 = \x -> case p1 x of Yes -> ... No -> ... If we have a call (<|> arg1 arg2) where arg1 is a parser, and hence often visibly a lambda, it's no so great to inline <|>, because we are still stuck on x. This affects for example T17516 Just an experiment. - - - - - 8968ee87 by Simon Peyton Jones at 2026-03-13T16:19:52+00:00 Wibbles In particular, a lambda is a value argument in interestingArg For some reason I had changed this and it made many things worse This wibble puts it back! - - - - - 430ab719 by Simon Peyton Jones at 2026-03-13T16:19:52+00:00 Tracing in SpecConstr only - - - - - e4e39934 by Simon Peyton Jones at 2026-03-13T16:19:52+00:00 Lambda arguments are values in interestingArg This matters a lot!!! - - - - - 6903d070 by Simon Peyton Jones at 2026-03-13T16:19:52+00:00 Make OtherCon unfoldings more eager to inline (again) New code: OtherCon [] -> NonTrivArg -- It's evaluated, but that's all we know OtherCon _ -> ValueArg -- Evaluated and we know it isn't these constructors -- See (IA2) in Note [Interesting arguments] Reasons explained in (IA2), in `GHC.Internal.Bignum.Integer`. Also (for OtherCon []): in the compiler itself x = mkSymMCo mco where mco is evaluated. We want mkSymMCo to inline, especially if the let is strict. Makes a significant difference in Rewrite.hs, Test case T9872b - - - - - c2c26b21 by Simon Peyton Jones at 2026-03-13T16:19:53+00:00 Once again try OtherCon [] -> TrivArg -- It's evaluated, but that's all we know Reason: much fruitless inlining of maMB in T18140, pushes up compile times - - - - - 544 changed files: - .gitlab-ci.yml - .gitlab/generate-ci/gen_ci.hs - .gitlab/jobs.yaml - .gitlab/rel_eng/fetch-gitlab-artifacts/fetch_gitlab.py - .gitlab/rel_eng/mk-ghcup-metadata/mk_ghcup_metadata.py - compiler/GHC/Builtin/Names.hs - compiler/GHC/Builtin/Names/TH.hs - compiler/GHC/Builtin/PrimOps.hs - compiler/GHC/Builtin/Types.hs - compiler/GHC/Builtin/Utils.hs - compiler/GHC/Builtin/primops.txt.pp - compiler/GHC/ByteCode/Linker.hs - compiler/GHC/ByteCode/Serialize.hs - compiler/GHC/Cmm/MachOp.hs - compiler/GHC/Cmm/Node.hs - compiler/GHC/Cmm/Utils.hs - compiler/GHC/CmmToAsm/AArch64/CodeGen.hs - compiler/GHC/CmmToAsm/Config.hs - compiler/GHC/CmmToAsm/X86/CodeGen.hs - compiler/GHC/CmmToAsm/X86/Instr.hs - 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[Git][ghc/ghc][wip/torsten.schmits/mwb-26-01/mp-backports] 3 commits: Don't store boot locations in finder cache
by Torsten Schmits (＠torsten.schmits) 13 Mar '26

13 Mar '26

Torsten Schmits pushed to branch wip/torsten.schmits/mwb-26-01/mp-backports at Glasgow Haskell Compiler / GHC Commits: ff5e16b0 by Sjoerd Visscher at 2026-03-13T16:20:54+01:00 Don't store boot locations in finder cache Partially reverts commit fff55592a7b Amends add(Home)ModuleToFinder so that locations for boot files are not stored in the finder cache. Removes InstalledModule field from InstalledFound constructor since it's the same as the key that was searched for. - - - - - ffceb7e6 by Sjoerd Visscher at 2026-03-13T16:36:00+01:00 Concentrate boot extension logic in Finder With new mkHomeModLocation that takes an extra HscSource to add boot extensions if required. - - - - - 65d1ec83 by Torsten Schmits at 2026-03-13T16:39:40+01:00 Add a complete pragma for `ModLocation` - - - - - 10 changed files: - compiler/GHC/Driver/Backpack.hs - compiler/GHC/Driver/Make.hs - compiler/GHC/Driver/MakeFile.hs - compiler/GHC/Driver/Phases.hs - compiler/GHC/Driver/Pipeline/Execute.hs - compiler/GHC/Iface/Load.hs - compiler/GHC/Linker/Loader.hs - compiler/GHC/Unit/Finder.hs - compiler/GHC/Unit/Finder/Types.hs - compiler/GHC/Unit/Module/Location.hs Changes: ===================================== compiler/GHC/Driver/Backpack.hs ===================================== @@ -788,7 +788,7 @@ summariseRequirement pn mod_name = do let loc = srcLocSpan (mkSrcLoc (mkFastString (bkp_filename env)) 1 1) let fc = hsc_FC hsc_env - mod <- liftIO $ addHomeModuleToFinder fc home_unit mod_name location + mod <- liftIO $ addHomeModuleToFinder fc home_unit mod_name location HsigFile extra_sig_imports <- liftIO $ findExtraSigImports hsc_env HsigFile mod_name @@ -862,17 +862,14 @@ hsModuleToModSummary home_keys pn hsc_src modname -- To add insult to injury, we don't even actually use -- these filenames to figure out where the hi files go. -- A travesty! - let location0 = mkHomeModLocation2 fopts modname + let location = mkHomeModLocation fopts modname (unsafeEncodeUtf $ unpackFS unit_fs </> moduleNameSlashes modname) - (case hsc_src of + (case hsc_src of HsigFile -> os "hsig" HsBootFile -> os "hs-boot" HsSrcFile -> os "hs") - -- DANGEROUS: bootifying can POISON the module finder cache - let location = case hsc_src of - HsBootFile -> addBootSuffixLocnOut location0 - _ -> location0 + hsc_src -- This duplicates a pile of logic in GHC.Driver.Make hi_timestamp <- liftIO $ modificationTimeIfExists (ml_hi_file location) hie_timestamp <- liftIO $ modificationTimeIfExists (ml_hie_file location) @@ -903,7 +900,7 @@ hsModuleToModSummary home_keys pn hsc_src modname this_mod <- liftIO $ do let home_unit = hsc_home_unit hsc_env let fc = hsc_FC hsc_env - addHomeModuleToFinder fc home_unit modname location + addHomeModuleToFinder fc home_unit modname location hsc_src let ms = ModSummary { ms_mod = this_mod, ms_hsc_src = hsc_src, ===================================== compiler/GHC/Driver/Make.hs ===================================== @@ -2122,16 +2122,23 @@ summariseFile hsc_env' home_unit old_summaries src_fn mb_phase maybe_buf <- getPreprocessedImports hsc_env src_fn mb_phase maybe_buf let fopts = initFinderOpts (hsc_dflags hsc_env) + (basename, extension) = splitExtension src_fn - -- Make a ModLocation for this file - let location = mkHomeModLocation fopts pi_mod_name (unsafeEncodeUtf src_fn) + hsc_src + | isHaskellSigSuffix (drop 1 extension) = HsigFile + | isHaskellBootSuffix (drop 1 extension) = HsBootFile + | otherwise = HsSrcFile + + -- Make a ModLocation for this file, adding the @-boot@ suffix to + -- all paths if the original was a boot file. + location = mkHomeModLocation fopts pi_mod_name (unsafeEncodeUtf basename) (unsafeEncodeUtf extension) hsc_src -- Tell the Finder cache where it is, so that subsequent calls -- to findModule will find it, even if it's not on any search path mod <- liftIO $ do let home_unit = hsc_home_unit hsc_env let fc = hsc_FC hsc_env - addHomeModuleToFinder fc home_unit pi_mod_name location + addHomeModuleToFinder fc home_unit pi_mod_name location hsc_src liftIO $ makeNewModSummary hsc_env $ MakeNewModSummary { nms_src_fn = src_fn @@ -2166,13 +2173,10 @@ checkSummaryHash -- and it was likely flushed in depanal. This is not technically -- needed when we're called from sumariseModule but it shouldn't -- hurt. - -- Also, only add to finder cache for non-boot modules as the finder cache - -- makes sure to add a boot suffix for boot files. - _ <- do - let fc = hsc_FC hsc_env - case ms_hsc_src old_summary of - HsSrcFile -> addModuleToFinder fc (ms_mod old_summary) location - _ -> return () + let fc = hsc_FC hsc_env + mod = ms_mod old_summary + hsc_src = ms_hsc_src old_summary + addModuleToFinder fc mod location hsc_src hi_timestamp <- modificationTimeIfExists (ml_hi_file location) hie_timestamp <- modificationTimeIfExists (ml_hie_file location) @@ -2224,7 +2228,7 @@ summariseModule hsc_env' home_unit old_summary_map is_boot (L _ wanted_mod) mb_p find_it :: IO SummariseResult find_it = do - found <- findImportedModule hsc_env wanted_mod mb_pkg + found <- findImportedModuleWithIsBoot hsc_env wanted_mod is_boot mb_pkg case found of Found location mod | isJust (ml_hs_file location) -> @@ -2242,10 +2246,7 @@ summariseModule hsc_env' home_unit old_summary_map is_boot (L _ wanted_mod) mb_p just_found location mod = do -- Adjust location to point to the hs-boot source file, -- hi file, object file, when is_boot says so - let location' = case is_boot of - IsBoot -> addBootSuffixLocn location - NotBoot -> location - src_fn = expectJust "summarise2" (ml_hs_file location') + let src_fn = expectJust "summarise2" (ml_hs_file location) -- Check that it exists -- It might have been deleted since the Finder last found it @@ -2255,7 +2256,7 @@ summariseModule hsc_env' home_unit old_summary_map is_boot (L _ wanted_mod) mb_p -- .hs-boot file doesn't exist. Nothing -> return NotThere Just h -> do - fresult <- new_summary_cache_check location' mod src_fn h + fresult <- new_summary_cache_check location mod src_fn h return $ case fresult of Left err -> FoundHomeWithError (moduleUnitId mod, err) Right ms -> FoundHome ms ===================================== compiler/GHC/Driver/MakeFile.hs ===================================== @@ -307,7 +307,7 @@ findDependency :: HscEnv findDependency hsc_env srcloc pkg imp dep_boot = do -- Find the module; this will be fast because -- we've done it once during downsweep - findImportedModule hsc_env imp pkg >>= \case + findImportedModuleWithIsBoot hsc_env imp dep_boot pkg >>= \case Found loc dep_mod -> pure DepHi { dep_mod, @@ -356,10 +356,9 @@ writeDependencies include_pkgs root hdl suffixes node deps = -- e.g. A.o : B.hi -- A.x_o : B.x_hi import_dep = \case - DepHi {dep_path, dep_boot, dep_unit} + DepHi {dep_path, dep_unit} | isNothing dep_unit || include_pkgs - , let path = addBootSuffix_maybe dep_boot dep_path - -> [([obj], hi) | (obj, hi) <- zip obj_files (suffixed path)] + -> [([obj], hi) | (obj, hi) <- zip obj_files (suffixed dep_path)] | otherwise -> [] ===================================== compiler/GHC/Driver/Phases.hs ===================================== @@ -23,6 +23,7 @@ module GHC.Driver.Phases ( isDynLibSuffix, isHaskellUserSrcSuffix, isHaskellSigSuffix, + isHaskellBootSuffix, isSourceSuffix, isHaskellishTarget, @@ -234,7 +235,7 @@ phaseInputExt Js = "js" phaseInputExt StopLn = "o" haskellish_src_suffixes, backpackish_suffixes, haskellish_suffixes, cish_suffixes, - js_suffixes, haskellish_user_src_suffixes, haskellish_sig_suffixes + js_suffixes, haskellish_user_src_suffixes, haskellish_sig_suffixes, haskellish_boot_suffixes :: [String] -- When a file with an extension in the haskellish_src_suffixes group is -- loaded in --make mode, its imports will be loaded too. @@ -247,7 +248,8 @@ js_suffixes = [ "js" ] -- Will not be deleted as temp files: haskellish_user_src_suffixes = - haskellish_sig_suffixes ++ [ "hs", "lhs", "hs-boot", "lhs-boot" ] + haskellish_sig_suffixes ++ haskellish_boot_suffixes ++ [ "hs", "lhs" ] +haskellish_boot_suffixes = [ "hs-boot", "lhs-boot" ] haskellish_sig_suffixes = [ "hsig", "lhsig" ] backpackish_suffixes = [ "bkp" ] @@ -265,11 +267,12 @@ dynlib_suffixes platform = case platformOS platform of _ -> ["so"] isHaskellishSuffix, isBackpackishSuffix, isHaskellSrcSuffix, isCishSuffix, - isHaskellUserSrcSuffix, isJsSuffix, isHaskellSigSuffix + isHaskellUserSrcSuffix, isJsSuffix, isHaskellSigSuffix, isHaskellBootSuffix :: String -> Bool isHaskellishSuffix s = s `elem` haskellish_suffixes isBackpackishSuffix s = s `elem` backpackish_suffixes isHaskellSigSuffix s = s `elem` haskellish_sig_suffixes +isHaskellBootSuffix s = s `elem` haskellish_boot_suffixes isHaskellSrcSuffix s = s `elem` haskellish_src_suffixes isCishSuffix s = s `elem` cish_suffixes isJsSuffix s = s `elem` js_suffixes ===================================== compiler/GHC/Driver/Pipeline/Execute.hs ===================================== @@ -725,7 +725,7 @@ runHscPhase pipe_env hsc_env0 input_fn src_flavour = do mod <- do let home_unit = hsc_home_unit hsc_env let fc = hsc_FC hsc_env - addHomeModuleToFinder fc home_unit mod_name location + addHomeModuleToFinder fc home_unit mod_name location src_flavour -- Make the ModSummary to hand to hscMain let @@ -769,24 +769,18 @@ mkOneShotModLocation :: PipeEnv -> DynFlags -> HscSource -> ModuleName -> IO Mod mkOneShotModLocation pipe_env dflags src_flavour mod_name = do let PipeEnv{ src_basename=basename, src_suffix=suff } = pipe_env - let location1 = mkHomeModLocation2 fopts mod_name (unsafeEncodeUtf basename) (unsafeEncodeUtf suff) - - -- Boot-ify it if necessary - let location2 - | HsBootFile <- src_flavour = addBootSuffixLocnOut location1 - | otherwise = location1 - + let location1 = mkHomeModLocation fopts mod_name (unsafeEncodeUtf basename) (unsafeEncodeUtf suff) src_flavour -- Take -ohi into account if present -- This can't be done in mkHomeModuleLocation because -- it only applies to the module being compiles let ohi = outputHi dflags - location3 | Just fn <- ohi = location2{ ml_hi_file_ospath = unsafeEncodeUtf fn } - | otherwise = location2 + location2 | Just fn <- ohi = location1{ ml_hi_file_ospath = unsafeEncodeUtf fn } + | otherwise = location1 let dynohi = dynOutputHi dflags - location4 | Just fn <- dynohi = location3{ ml_dyn_hi_file_ospath = unsafeEncodeUtf fn } - | otherwise = location3 + location3 | Just fn <- dynohi = location2{ ml_dyn_hi_file_ospath = unsafeEncodeUtf fn } + | otherwise = location2 -- Take -o into account if present -- Very like -ohi, but we must *only* do this if we aren't linking @@ -799,11 +793,11 @@ mkOneShotModLocation pipe_env dflags src_flavour mod_name = do location5 | Just ofile <- expl_o_file , let dyn_ofile = fromMaybe (ofile -<.> dynObjectSuf_ dflags) expl_dyn_o_file , isNoLink (ghcLink dflags) - = location4 { ml_obj_file_ospath = unsafeEncodeUtf ofile + = location3 { ml_obj_file_ospath = unsafeEncodeUtf ofile , ml_dyn_obj_file_ospath = unsafeEncodeUtf dyn_ofile } | Just dyn_ofile <- expl_dyn_o_file - = location4 { ml_dyn_obj_file_ospath = unsafeEncodeUtf dyn_ofile } - | otherwise = location4 + = location3 { ml_dyn_obj_file_ospath = unsafeEncodeUtf dyn_ofile } + | otherwise = location3 return location5 where fopts = initFinderOpts dflags ===================================== compiler/GHC/Iface/Load.hs ===================================== @@ -928,9 +928,9 @@ findAndReadIface hsc_env doc_str mod wanted_mod hi_boot_file = do else do let fopts = initFinderOpts dflags -- Look for the file - mb_found <- liftIO (findExactModule fc fopts other_fopts unit_state mhome_unit mod) + mb_found <- liftIO (findExactModule fc fopts other_fopts unit_state mhome_unit mod hi_boot_file) case mb_found of - InstalledFound (addBootSuffixLocn_maybe hi_boot_file -> loc) mod -> do + InstalledFound loc -> do -- See Note [Home module load error] case mhome_unit of Just home_unit ===================================== compiler/GHC/Linker/Loader.hs ===================================== @@ -663,7 +663,7 @@ initLinkDepsOpts hsc_env = opts Maybe.Failed err -> pure (Maybe.Failed err) Maybe.Succeeded iface -> find_location mod <&> \case - InstalledFound loc _ -> Maybe.Succeeded (iface, loc) + InstalledFound loc -> Maybe.Succeeded (iface, loc) err -> Maybe.Failed $ cannotFindInterface unit_state home_unit (targetProfile dflags) (moduleName mod) err @@ -671,7 +671,7 @@ initLinkDepsOpts hsc_env = opts find_location mod = liftIO $ findExactModule (hsc_FC hsc_env) (initFinderOpts dflags) - other_fopts unit_state home_unit (toUnitId <$> mod) + other_fopts unit_state home_unit (toUnitId <$> mod) NotBoot other_fopts = initFinderOpts . homeUnitEnv_dflags <$> hsc_HUG hsc_env ===================================== compiler/GHC/Unit/Finder.hs ===================================== @@ -15,6 +15,7 @@ module GHC.Unit.Finder ( initFinderCache, flushFinderCaches, findImportedModule, + findImportedModuleWithIsBoot, findPluginModule, findExactModule, findHomeModule, @@ -62,6 +63,7 @@ import GHC.Utils.Panic import GHC.Linker.Types import GHC.Types.PkgQual +import GHC.Types.SourceFile import GHC.Fingerprint import Data.IORef @@ -171,6 +173,13 @@ findImportedModule hsc_env mod pkg_qual = query <- hscUnitIndexQuery hsc_env findImportedModuleNoHsc fc fopts (hsc_unit_env hsc_env) query home_module_map mhome_unit mod pkg_qual +findImportedModuleWithIsBoot :: HscEnv -> ModuleName -> IsBootInterface -> PkgQual -> IO FindResult +findImportedModuleWithIsBoot hsc_env mod is_boot pkg_qual = do + res <- findImportedModule hsc_env mod pkg_qual + case (res, is_boot) of + (Found loc mod, IsBoot) -> return (Found (addBootSuffixLocn loc) mod) + _ -> return res + findImportedModuleNoHsc :: FinderCache -> FinderOpts @@ -261,15 +270,19 @@ findPluginModule fc fopts units query Nothing mod_name = -- reading the interface for a module mentioned by another interface, -- for example (a "system import"). -findExactModule :: FinderCache -> FinderOpts -> UnitEnvGraph FinderOpts -> UnitState -> Maybe HomeUnit -> InstalledModule -> IO InstalledFindResult -findExactModule fc fopts other_fopts unit_state mhome_unit mod = do - case mhome_unit of +findExactModule :: FinderCache -> FinderOpts -> UnitEnvGraph FinderOpts -> UnitState -> Maybe HomeUnit -> InstalledModule -> IsBootInterface -> IO InstalledFindResult +findExactModule fc fopts other_fopts unit_state mhome_unit mod is_boot = do + res <- case mhome_unit of Just home_unit | isHomeInstalledModule home_unit mod -> findInstalledHomeModule fc fopts (homeUnitId home_unit) (moduleName mod) | Just home_fopts <- HUG.unitEnv_lookup_maybe (moduleUnit mod) other_fopts -> findInstalledHomeModule fc home_fopts (moduleUnit mod) (moduleName mod) _ -> findPackageModule fc unit_state fopts mod + case (res, is_boot) of + (InstalledFound loc, IsBoot) -> return (InstalledFound (addBootSuffixLocn loc)) + _ -> return res + -- ----------------------------------------------------------------------------- -- Helpers @@ -329,7 +342,7 @@ findLookupResult fc fopts r = case r of -- with just the location of the thing that was -- instantiated; you probably also need all of the -- implicit locations from the instances - InstalledFound loc _ -> return (Found loc m) + InstalledFound loc -> return (Found loc m) InstalledNoPackage _ -> return (NoPackage (moduleUnit m)) InstalledNotFound fp _ -> return (NotFound{ fr_paths = fmap unsafeDecodeUtf fp, fr_pkg = Just (moduleUnit m) , fr_pkgs_hidden = [] @@ -374,16 +387,18 @@ modLocationCache fc mod do_this = do addToFinderCache fc mod result return result -addModuleToFinder :: FinderCache -> Module -> ModLocation -> IO () -addModuleToFinder fc mod loc = do +addModuleToFinder :: FinderCache -> Module -> ModLocation -> HscSource -> IO () +addModuleToFinder fc mod loc src_flavour = do let imod = toUnitId <$> mod - addToFinderCache fc imod (InstalledFound loc imod) + unless (src_flavour == HsBootFile) $ + addToFinderCache fc imod (InstalledFound loc) -- This returns a module because it's more convenient for users -addHomeModuleToFinder :: FinderCache -> HomeUnit -> ModuleName -> ModLocation -> IO Module -addHomeModuleToFinder fc home_unit mod_name loc = do +addHomeModuleToFinder :: FinderCache -> HomeUnit -> ModuleName -> ModLocation -> HscSource -> IO Module +addHomeModuleToFinder fc home_unit mod_name loc src_flavour = do let mod = mkHomeInstalledModule home_unit mod_name - addToFinderCache fc mod (InstalledFound loc mod) + unless (src_flavour == HsBootFile) $ + addToFinderCache fc mod (InstalledFound loc) return (mkHomeModule home_unit mod_name) uncacheModule :: FinderCache -> HomeUnit -> ModuleName -> IO () @@ -399,7 +414,7 @@ findHomeModule fc fopts home_unit mod_name = do let uid = homeUnitAsUnit home_unit r <- findInstalledHomeModule fc fopts (homeUnitId home_unit) mod_name return $ case r of - InstalledFound loc _ -> Found loc (mkHomeModule home_unit mod_name) + InstalledFound loc -> Found loc (mkHomeModule home_unit mod_name) InstalledNoPackage _ -> NoPackage uid -- impossible InstalledNotFound fps _ -> NotFound { fr_paths = fmap unsafeDecodeUtf fps, @@ -424,7 +439,7 @@ findHomePackageModule fc fopts home_unit mod_name = do let uid = RealUnit (Definite home_unit) r <- findInstalledHomeModule fc fopts home_unit mod_name return $ case r of - InstalledFound loc _ -> Found loc (mkModule uid mod_name) + InstalledFound loc -> Found loc (mkModule uid mod_name) InstalledNoPackage _ -> NoPackage uid -- impossible InstalledNotFound fps _ -> NotFound { fr_paths = fmap unsafeDecodeUtf fps, @@ -494,7 +509,7 @@ findInstalledHomeModule fc fopts home_unit mod_name = do -- This is important only when compiling the base package (where GHC.Prim -- is a home module). if mod `installedModuleEq` gHC_PRIM - then return (InstalledFound (error "GHC.Prim ModLocation") mod) + then return (InstalledFound (error "GHC.Prim ModLocation")) else searchPathExts search_dirs mod exts -- | Prepend the working directory to the search path. @@ -527,7 +542,7 @@ findPackageModule_ fc fopts mod pkg_conf = do -- special case for GHC.Prim; we won't find it in the filesystem. if mod `installedModuleEq` gHC_PRIM - then return (InstalledFound (error "GHC.Prim ModLocation") mod) + then return (InstalledFound (error "GHC.Prim ModLocation")) else let @@ -551,7 +566,7 @@ findPackageModule_ fc fopts mod pkg_conf = do -- don't bother looking for it. let basename = unsafeEncodeUtf $ moduleNameSlashes (moduleName mod) loc = mk_hi_loc one basename - in return $ InstalledFound loc mod + in return $ InstalledFound loc _otherwise -> searchPathExts import_dirs mod [(package_hisuf, mk_hi_loc)] @@ -585,7 +600,7 @@ searchPathExts paths mod exts = search to_search search ((file, loc) : rest) = do b <- doesFileExist file if b - then return $ InstalledFound loc mod + then return $ InstalledFound loc else search rest mkHomeModLocationSearched :: FinderOpts -> ModuleName -> FileExt @@ -627,10 +642,12 @@ mkHomeModLocationSearched fopts mod suff path basename = -- ext -- The filename extension of the source file (usually "hs" or "lhs"). -mkHomeModLocation :: FinderOpts -> ModuleName -> OsPath -> ModLocation -mkHomeModLocation dflags mod src_filename = - let (basename,extension) = OsPath.splitExtension src_filename - in mkHomeModLocation2 dflags mod basename extension +mkHomeModLocation :: FinderOpts -> ModuleName -> OsPath -> FileExt -> HscSource -> ModLocation +mkHomeModLocation dflags mod src_basename ext hsc_src = + let loc = mkHomeModLocation2 dflags mod src_basename ext + in case hsc_src of + HsBootFile -> addBootSuffixLocnOut loc + _ -> loc mkHomeModLocation2 :: FinderOpts -> ModuleName ===================================== compiler/GHC/Unit/Finder/Types.hs ===================================== @@ -30,7 +30,7 @@ data FinderCache = FinderCache { fcModuleCache :: (IORef FinderCacheState) } data InstalledFindResult - = InstalledFound ModLocation InstalledModule + = InstalledFound ModLocation | InstalledNoPackage UnitId | InstalledNotFound [OsPath] (Maybe UnitId) ===================================== compiler/GHC/Unit/Module/Location.hs ===================================== @@ -13,8 +13,6 @@ module GHC.Unit.Module.Location ) , pattern ModLocation , addBootSuffix - , addBootSuffix_maybe - , addBootSuffixLocn_maybe , addBootSuffixLocn , addBootSuffixLocnOut , removeBootSuffix @@ -24,7 +22,6 @@ where import GHC.Prelude import GHC.Data.OsPath -import GHC.Unit.Types import GHC.Utils.Outputable import qualified System.OsString as OsString @@ -96,26 +93,10 @@ removeBootSuffix pathWithBootSuffix = Just path -> path Nothing -> error "removeBootSuffix: no -boot suffix" --- | Add the @-boot@ suffix if the @Bool@ argument is @True@ -addBootSuffix_maybe :: IsBootInterface -> OsPath -> OsPath -addBootSuffix_maybe is_boot path = case is_boot of - IsBoot -> addBootSuffix path - NotBoot -> path - -addBootSuffixLocn_maybe :: IsBootInterface -> ModLocation -> ModLocation -addBootSuffixLocn_maybe is_boot locn = case is_boot of - IsBoot -> addBootSuffixLocn locn - _ -> locn - -- | Add the @-boot@ suffix to all file paths associated with the module addBootSuffixLocn :: ModLocation -> ModLocation addBootSuffixLocn locn - = locn { ml_hs_file_ospath = fmap addBootSuffix (ml_hs_file_ospath locn) - , ml_hi_file_ospath = addBootSuffix (ml_hi_file_ospath locn) - , ml_dyn_hi_file_ospath = addBootSuffix (ml_dyn_hi_file_ospath locn) - , ml_obj_file_ospath = addBootSuffix (ml_obj_file_ospath locn) - , ml_dyn_obj_file_ospath = addBootSuffix (ml_dyn_obj_file_ospath locn) - , ml_hie_file_ospath = addBootSuffix (ml_hie_file_ospath locn) } + = addBootSuffixLocnOut locn { ml_hs_file_ospath = fmap addBootSuffix (ml_hs_file_ospath locn) } -- | Add the @-boot@ suffix to all output file paths associated with the -- module, not including the input file itself @@ -157,3 +138,5 @@ pattern ModLocation , ml_dyn_obj_file_ospath = unsafeEncodeUtf ml_dyn_obj_file , ml_hie_file_ospath = unsafeEncodeUtf ml_hie_file } + +{-# complete ModLocation #-} View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/b989904c813530b7f7c11da9de0ba6… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/b989904c813530b7f7c11da9de0ba6… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/T26831] 151 commits: ci: update darwin boot ghc to 9.10.3
by Simon Peyton Jones (＠simonpj) 13 Mar '26

13 Mar '26

Simon Peyton Jones pushed to branch wip/T26831 at Glasgow Haskell Compiler / GHC Commits: 50761451 by Cheng Shao at 2026-01-27T21:51:23-05:00 ci: update darwin boot ghc to 9.10.3 This patch updates darwin boot ghc to 9.10.3, along with other related updates, and pays off some technical debt here: - Update `nixpkgs` and use the `nixpkgs-25.05-darwin` channel. - Update the `niv` template. - Update LLVM to 21 and update `llvm-targets` to reflect LLVM 21 layout changes for arm64/x86_64 darwin targets. - Use `stdenvNoCC` to prevent nix packaged apple sdk from being used by boot ghc, and manually set `DEVELOPER_DIR`/`SDKROOT` to enforce the usage of system-wide command line sdk for macos. - When building nix derivation for boot ghc, run `configure` via the `arch` command so that `configure` and its subprocesses pick up the manually specified architecture. - Remove the previous horrible hack that obliterates `configure` to make autoconf test result in true. `configure` now properly does its job. - Remove the now obsolete configure args and post install settings file patching logic. - Use `scheme-small` for texlive to avoid build failures in certain unused texlive packages, especially on x86_64-darwin. - - - - - 94dcd15e by Matthew Pickering at 2026-01-27T21:52:05-05:00 Evaluate backtraces for "error" exceptions at the moment they are thrown See Note [Capturing the backtrace in throw] and Note [Hiding precise exception signature in throw] which explain the implementation. This commit makes `error` and `throw` behave the same with regard to backtraces. Previously, exceptions raised by `error` would not contain useful IPE backtraces. I did try and implement `error` in terms of `throw` but it started to involve putting diverging functions into hs-boot files, which seemed to risky if the compiler wouldn't be able to see if applying a function would diverge. CLC proposal: https://github.com/haskell/core-libraries-committee/issues/383 Fixes #26751 - - - - - ef35e3ea by Teo Camarasu at 2026-01-27T21:52:46-05:00 ghc-internal: move all Data instances to Data.Data Most instances of Data are defined in GHC.Internal.Data.Data. Let's move all remaining instance there. This moves other modules down in the dependency hierarchy allowing for more parallelism, and it decreases the likelihood that we would need to load this heavy .hi file if we don't actually need it. Resolves #26830 Metric Decrease: T12227 T16875 - - - - - 5e0ec555 by sheaf at 2026-01-28T06:56:38-05:00 Add test case for #25679 This commit adds the T25679 test case. The test now passes, thanks to commit 1e53277af36d3f0b6ad5491f70ffc5593a49dcfd. Fixes #25679 - - - - - f1cd1611 by sheaf at 2026-01-28T06:56:38-05:00 Improve defaulting of representational equalities This commit makes the defaulting of representational equalities, introduced in 1e53277a, a little bit more robust. Now, instead of calling the eager unifier, it calls the full-blown constraint solver, which means that it can handle some subtle situations, e.g. involving functional dependencies and type-family injectivity annotations, such as: type family F a = r | r -> a type instance F Int = Bool [W] F beta ~R Bool - - - - - 25edf516 by sheaf at 2026-01-28T06:56:38-05:00 Improve errors for unsolved representational equalities This commit adds a new field of CtLoc, CtExplanations, which allows the typechecker to leave some information about what it has done. For the moment, it is only used to improve error messages for unsolved representational equalities. The typechecker will now accumulate, when unifying at representational role: - out-of-scope newtype constructors, - type constructors that have nominal role in a certain argument, - over-saturated type constructors, - AppTys, e.g. `c a ~R# c b`, to report that we must assume that 'c' has nominal role in its parameters, - data family applications that do not reduce, potentially preventing newtype unwrapping. Now, instead of having to re-construct the possible errors after the fact, we simply consult the CtExplanations field. Additionally, this commit modifies the typechecker error messages that concern out-of-scope newtype constructors. The error message now depends on whether we have an import suggestion to provide to the user: - If we have an import suggestion for the newtype constructor, the message will be of the form: The data constructor MkN of the newtype N is out of scope Suggested fix: add 'MkN' to the import list in the import of 'M' - If we don't have any import suggestions, the message will be of the form: NB: The type 'N' is an opaque newtype, whose constructor is hidden Fixes #15850, #20289, #20468, #23731, #25949, #26137 - - - - - 4d0e6da1 by Simon Peyton Jones at 2026-01-28T06:57:19-05:00 Fix two bugs in short-cut constraint solving There are two main changes here: * Use `isSolvedWC` rather than `isEmptyWC` in `tryShortCutSolver` The residual constraint may have some fully-solved, but still-there implications, and we don't want them to abort short cut solving! That bug caused #26805. * In the short-cut solver, we abandon the fully-solved residual constraint; but we may thereby lose track of Givens that are needed, and either report them as redundant or prune evidence bindings that are in fact needed. This bug stopped the `constraints` package from compiling; see the trail in !15389. The second bug led me to (another) significant refactoring of the mechanism for tracking needed EvIds. See the new Note [Tracking needed EvIds] in GHC.Tc.Solver.Solve It's simpler and much less head-scratchy now. Some particulars: * An EvBindsVar now tracks NeededEvIds * We deal with NeededEvIds for an implication only when it is fully solved. Much simpler! * `tryShortCutTcS` now takes a `TcM WantedConstraints` rather than `TcM Bool`, so that is can plumb the needed EvIds correctly. * Remove `ic_need` and `ic_need_implic` from Implication (hooray), and add `ics_dm` and `ics_non_dm` to `IC_Solved`. Pure refactor * Shorten data constructor `CoercionHole` to `CH`, following general practice in GHC. * Rename `EvBindMap` to `EvBindsMap` for consistency - - - - - 662480b7 by Cheng Shao at 2026-01-28T06:58:00-05:00 ci: use debian validate bindists instead of fedora release bindists in testing stage This patch changes the `abi-test`, `hadrian-multi` and `perf` jobs in the full-ci pipeline testing stage to use debian validate bindists instead of fedora release bindists, to increase pipeline level parallelism and allow full-ci pipelines to complete earlier. Closes #26818. - - - - - 39581ec6 by Cheng Shao at 2026-01-28T06:58:40-05:00 ci: run perf test with -j$cores This patch makes the perf ci job compile Cabal with -j$cores to speed up the job. - - - - - 607b287b by Wolfgang Jeltsch at 2026-01-28T15:41:53+02:00 Remove `GHC.Desugar` from `base` `GHC.Desugar` was deprecated and should have been removed in GHC 9.14. However, the removal was forgotten, although there was a code block that was intended to trigger a compilation error when the GHC version in use was 9.14 or later. This code sadly didn’t work, because the `__GLASGOW_HASKELL__` macro was misspelled as `__GLASGOW_HASKELL`. - - - - - e8f5a45d by sterni at 2026-01-29T04:19:18-05:00 users_guide: fix runtime error during build with Sphinx 9.1.0 Appears that pathto is stricter about what it accepts now. Tested Sphinx 8.2.3 and 9.1.0 on the ghc-9.10 branch. Resolves #26810. Co-authored-by: Martin Weinelt <hexa(a)darmstadt.ccc.de> - - - - - ce2d62fb by Jessica Clarke at 2026-01-29T19:48:51-05:00 PPC NCG: Use libcall for 64-bit cmpxchg on 32-bit PowerPC There is no native instruction for this, and even if there were a register pair version we could use, the implementation here is assuming the values fit in a single register, and we end up only using / defining the low halves of the registers. Fixes: b4d39adbb5 ("PrimOps: Add CAS op for all int sizes") Fixes: #23969 - - - - - 43d97761 by Michael Karcher at 2026-01-29T19:49:43-05:00 NCG for PPC: add pattern for CmmRegOff to iselExpr64 Closes #26828 - - - - - aeeb4a20 by Matthew Pickering at 2026-01-30T11:42:47-05:00 determinism: Use deterministic map for Strings in TyLitMap When generating typeable evidence the types we need evidence for all cached in a TypeMap, the order terms are retrieved from a type map determines the order the bindings appear in the program. A TypeMap is quite diligent to use deterministic maps, apart from in the TyLitMap, which uses a UniqFM for storing strings, whose ordering depends on the Unique of the FastString. This can cause non-deterministic .hi and .o files. An unexpected side-effect is the error message but RecordDotSyntaxFail8 changing. I looked into this with Sam and this change caused the constraints to be solved in a different order which results in a slightly different error message. I have accepted the new test, since the output before was non-deterministic and the new output is consistent with the other messages in that file. Fixes #26846 - - - - - 9e4d70c2 by Andrew Lelechenko at 2026-01-30T11:43:29-05:00 Upgrade text submodule to 2.1.4 - - - - - 631fa5ae by Recursion Ninja at 2026-01-31T22:30:11+00:00 Decouple `L.S.H.Decls` from importing `GHC.Types.Basic` Data-types within `GHC.Types.Basic` which describe components of the AST are migrated to `Language.Haskell.Syntax.Basic`. Related function definitions are also moved. Types moved to L.H.S. because they are part of the AST: * TopLevelFlag * RuleName Types moved from L.H.S. to GHC.Hs. because they are not needed in the AST: * TyConFlavour * TypeOrData * NewOrData Migrated instances: * `Outputable` instances moved to in `GHC.Utils.Outputable` * `Binary` instance of `Boxity` moved to to `GHC.Utils.Binary` * Other `Binary` instances are orphans to be migrated later. The `OverlapMode` data-type is given a TTG extension point. The `OverlapFlag` data-type, which depends on `OverlapMode`, is updated to support `OverlapMode` with a GHC "pass" type paramerter. In order to avoid module import cycles, `OverlapMode` and `OverlapFlag` are migrated to new modules (no way around this). * Migrated `OverlapMode` to new module `Language.Haskell.Syntax.Overlap` * Migrated `OverlapFlag` to new module `GHC.Hs.Decls.Overlap` - - - - - 9769cc03 by Simon Hengel at 2026-02-01T04:21:03-05:00 Update the documentation for MultiWayIf (fixes #25376) (so that it matches the implementation) - - - - - 5fc9442a by Peter Trommler at 2026-02-01T04:21:44-05:00 hadrian: Fix dependency generation for assembler Assembler files allow # for comments unless in column 1. A modern cpp for C treats those a preprocessor directives. We tell gcc that a .S file is assembler with cpp and not C. Fixes #26819 - - - - - 269c4087 by Simon Peyton Jones at 2026-02-01T19:38:10-05:00 Include current phase in the range for rule/unfoldings This MR fixes a bad loop in the compiler: #26826. The fix is to add (WAR2) to Note [What is active in the RHS of a RULE or unfolding?] in GHC.Core.Opt.Simplify.Utils - - - - - ddf1434f by Vladislav Zavialov at 2026-02-01T19:38:52-05:00 Refactor: merge HsMultilineString into HsString (#26860) Before this patch, HsLit defined two separate constructors to represent single-line and multi-line strings: data HsLit x ... | HsString (XHsString x) FastString | HsMultilineString (XHsMultilineString x) FastString I found this to be an unnecessary complication and an obstacle to unifying HsLit with HsTyLit. Now we use HsString for both kinds of literals. One user-facing change here is `ppr (HsString st s)` behaving differently for single-line strings containing newlines: x = "first line \ \asdf\n\ \second line" Previously, the literal was fed to `ftext` with its newlines, producing an ill-formed SDoc. This issue is now addressed by using `split` for both single-line and multi-line strings: vcat $ map text $ split '\n' (unpackFS src) See the parser/should_fail/T26860ppr test. In addition (and unrelatedly to the main payload of this patch), drop the unused pmPprHsLit helper. - - - - - 2b4f463c by Simon Peyton Jones at 2026-02-02T17:32:32+00:00 Remove exprIsCheap from doFloatFromRhs See #26854 and Note [Float when expandable] This patch simplifies the code, by removing an extra unnecessary test. - - - - - 9db7f21f by Brandon Chinn at 2026-02-03T09:15:10-05:00 Refactor: make function patterns exhaustive Also added missing (==) logic for: * HsMultilineString * HsInt{8,16,32} * HsWord{8,16,32} - - - - - aa9c5e2c by Hécate Kleidukos at 2026-02-03T15:58:35-05:00 driver: Hide source paths at verbosity level 1 by default - - - - - c64cca1e by mangoiv at 2026-02-03T15:59:29-05:00 ExplicitLevelImports: check staging for types just like for values Previously, imported types were entirely exempted from staging checks as the implicit stage persistance assumed to be all imported types to be well staged. ExplicitLevelImports' change specification, however, does not do such an exemption. Thus we want to introduce such a check, just like we have for values. ExplicitLevelImports does not, however, talk about local names - from its perspective, we could theoretically keep treating locally introduced types specially - e.g. an ill-staged used in a quote would only emit a warning, not an error. To allow for a potential future migration away from such wrinkles as the staging check in notFound (see Note [Out of scope might be a staging error]) we consistently do the strict staging check that we also do for value if ExplicitLevelImports is on. Closes #26098 - - - - - 5f0dbeb6 by Simon Hengel at 2026-02-03T16:00:12-05:00 Use Haddock formatting in deprecation message of `initNameCache` - - - - - 01ecb612 by Andreas Klebinger at 2026-02-04T09:56:25-05:00 testsuite: Explicitly use utf-8 encoding in rts-includes linter. Not doing so caused failures on windows, as python failed to pick a reasonable encoding even with locale set. Fixes #26850 - - - - - ea0d1317 by Zubin Duggal at 2026-02-04T09:57:06-05:00 Bump transformers submodule to 0.6.3.0 Fixes #26790 - - - - - cbe4300e by Simon Peyton Jones at 2026-02-05T04:31:04-05:00 Fix subtle bug in GHC.Core.Utils.mkTick This patch fixes a decade-old bug in `mkTick`, which could generate type-incorrect code! See the diagnosis in #26772. The new code is simpler and easier to understand. (As #26772 says, I think it could be improved further.) - - - - - a193a8da by Simon Peyton Jones at 2026-02-05T04:31:04-05:00 Modify a debug-trace in the Simplifier ...just to show a bit more information. - - - - - b579dfdc by Simon Peyton Jones at 2026-02-05T04:31:04-05:00 Fix long-standing interaction between ticks and casts The code for Note [Eliminate Identity Cases] was simply wrong when ticks and casts interacted. This patch fixes the interaction. It was shown up when validating #26772, although it's not the exactly the bug that's reported by #26772. Nor is it easy to reproduce, hence no regression test. - - - - - fac0de1e by Cheng Shao at 2026-02-05T04:31:49-05:00 libraries: bump Cabal submodule to 3.16.1.0 - - - - - 00589122 by Cheng Shao at 2026-02-05T04:31:49-05:00 libraries: bump deepseq submodule to 1.5.2.0 Also: - Get rid of usage of deprecated `NFData` function instance in the compiler - `T21391` still relies on `NFData` function instance, add `-Wno-deprecations` for the time being. - - - - - 84474c71 by Cheng Shao at 2026-02-05T04:31:50-05:00 libraries: bump directory submodule to 1.3.10.1 - - - - - 1a9f4662 by Cheng Shao at 2026-02-05T04:31:50-05:00 libraries: bump exceptions submodule to 0.10.12 - - - - - 2e39a340 by Peng Fan at 2026-02-07T03:42:01-05:00 NCG/LA64: adjust register usage to avoid src-register being clobbered - - - - - 9faf1b35 by Teo Camarasu at 2026-02-07T03:42:43-05:00 ghc-internal: Delete unnecessary GHC.Internal.Data.Ix This module merely re-exports GHC.Internal.Ix. It was copied from `base` when `ghc-internal` was split, but there is no reason to have this now. So, let's delete it. Resolves #26848 - - - - - d112b440 by Sven Tennie at 2026-02-07T10:47:56-05:00 Add cabal.project file to generate-ci This fixes the HLS setup for our CI code generation script (generate-ci). The project file simply makes `generate-ci` of the cabal file discoverable. - - - - - 5339f6f0 by Andreas Klebinger at 2026-02-07T10:48:40-05:00 CI: Don't collapse test results. This puts test output back into the primary test log instead of a subsection removing the need to expand a section to see test results. While the intention was good in practice the old behaviour mostly wastes time by requiring expansion of the section. Fixes #26882 - - - - - 0e1cd2e0 by Evan Piro at 2026-02-08T10:35:16-08:00 Linker.MacOS reduce dynflags import - - - - - 1c79a4cd by Michael Alan Dorman at 2026-02-09T08:11:51-05:00 Remove `extra_src_files` variable from `testsuite/driver/testlib.py` While reading through the test harness code, I noticed this variable with a TODO attached that referenced #12223. Although that bug is closed, it strongly implied that this special-case variable that only affected a single test was expected to be removed at some point. I also looked at 3415bcaa0b1903b5e12dfaadb5b774718e406eab---where it was added---whose commit message suggested that it would have been desirable to remove it, but that there were special circumstances that meant it had to remain (though it doesn't elucidate what those special circumstances are). However, the special circumstances were mentioned as if the test was in a different location than is currently is, so I decided to try changing the test to use the standard `extra_files` mechanism, which works in local testing. This also seems like a reasonable time to remove the script that was originally used in the transition, since it doesn't really serve a purpose anymore. - - - - - 0020e38a by Matthew Pickering at 2026-02-09T17:29:14-05:00 determinism: Use a stable sort in WithHsDocIdentifiers binary instance `WithHsDocIdentifiers` is defined as ``` 71 data WithHsDocIdentifiers a pass = WithHsDocIdentifiers 72 { hsDocString :: !a 73 , hsDocIdentifiers :: ![Located (IdP pass)] 74 } ``` This list of names is populated from `rnHsDocIdentifiers`, which calls `lookupGRE`, which calls `lookupOccEnv_AllNameSpaces`, which calls `nonDetEltsUFM` and returns the results in an order depending on uniques. Sorting the list with a stable sort before returning the interface makes the output deterministic and follows the approach taken by other fields in `Docs`. Fixes #26858 - - - - - 89898ce6 by echoumcp1 at 2026-02-09T17:30:01-05:00 Replace putstrln with logMsg in handleSeqHValueStatus Fixes #26549 - - - - - 7c52c4f9 by John Paul Adrian Glaubitz at 2026-02-10T13:52:43-05:00 rts: Switch prim to use modern atomic compiler builtins The __sync_*() atomic compiler builtins have been deprecated in GCC for a while now and also don't provide variants for 64-bit values such as __sync_fetch_and_add_8(). Thus, replace them with the modern __atomic_*() compiler builtins and while we're at it, also drop the helper macro CAS_NAND() which is now no longer needed since we stopped using the __sync_*() compiler builtins altogether. Co-authored-by: Ilias Tsitsimpis <iliastsi(a)debian.org> Fixes #26729 - - - - - cf60850a by Recursion Ninja at 2026-02-10T13:53:27-05:00 Decoupling L.H.S.Decls from GHC.Types.ForeignCall - Adding TTG extension point for 'CCallTarget' - Adding TTG extension point for 'CType' - Adding TTG extension point for 'Header' - Moving ForeignCall types that do not need extension to new L.H.S.Decls.Foreign module - Replacing 'Bool' parameters with descriptive data-types to increase clairty and prevent "Boolean Blindness" - - - - - 11a04cbb by Eric Lee at 2026-02-11T09:20:46-05:00 Derive Semigroup/Monoid for instances believed could be derived in #25871 - - - - - 15d9ce44 by Eric Lee at 2026-02-11T09:20:46-05:00 add Ghc.Data.Pair deriving - - - - - c85dc170 by Evan Piro at 2026-02-11T09:21:45-05:00 Linker.MacOS reduce options import - - - - - a541dd83 by Chris Wendt at 2026-02-11T16:06:41-05:00 Initialize plugins for `:set +c` in GHCi Fixes #23110. - - - - - 0f5a73bc by Cheng Shao at 2026-02-11T16:07:27-05:00 compiler: add Binary Text instance This patch adds `Binary` instance for strict `Text`, in preparation of making `Text` usable in certain GHC API use cases (e.g. haddock). This also introduces `text` as a direct dependency of the `ghc` package. - - - - - 9e58b8a1 by Cheng Shao at 2026-02-11T16:08:10-05:00 ghc-toolchain: add C11 check This patch partially reverts commit b8307eab80c5809df5405d76c822bf86877f5960 that removed C99 check in autoconf/ghc-toolchain. Now we: - No longer re-implement `FP_SET_CFLAGS_C11` similar to `FP_SET_CFLAGS_C99` in the past, since autoconf doesn't provide a convenient `AC_PROG_CC_C11` function. ghc-toolchain will handle it anyway. - The Cmm CPP C99 check is relanded and repurposed for C11. - The C99 logic in ghc-toolchain is relanded and repurposed for C11. - The C99 check in Stg.h is corrected to check for C11. The obsolete _ISOC99_SOURCE trick is dropped. - Usages of `-std=gnu99` in the testsuite are corrected to use `-std=gnu11`. Closes #26908. - - - - - 4df0adf6 by Simon Peyton Jones at 2026-02-11T21:50:13-05:00 Simplify the treatment of static forms This MR implements GHC proposal 732: simplify static forms, https://github.com/ghc-proposals/ghc-proposals/pull/732 thereby addressing #26556. See `Note [Grand plan for static forms]` in GHC.Iface.Tidy.StaticPtrTable The main changes are: * There is a new, simple rule for (static e), namely that the free term variables of `e` must be bound at top level. The check is done in the `HsStatic` case of `GHC.Rename.Expr.rnExpr` * That in turn substantially simplifies the info that the typechecker carries around in its type environment. Hooray. * The desugarer emits static bindings to top level directly; see the `HsStatic` case of `dsExpr`. * There is no longer any special static-related magic in the FloatOut pass. And the main Simplifier pipeline no longer needs a special case to run FloatOut even with -O0. Hooray. All this forced an unexpected change to the pattern match checker. It recursively invokes the main Hs desugarer when it wants to take a look at a term to spot some special cases (notably constructor applications). We don't want to emit any nested (static e) bindings to top level a second time! Yikes. That forced a modest refactor in GHC.HsToCore.Pmc: * The `dsl_nablas` field of `DsLclEnv` now has a `NoPmc` case, which says "I'm desugaring just for pattern-match checking purposes". * When that flag is set we don't emit static binds. That in turn forces a cascade of refactoring, but the net effect is an improvement; less risk of duplicated (even exponential?) work. See Note [Desugaring HsExpr during pattern-match checking]. 10% metric decrease, on some architectures, of compile-time max-bytes-used on T15304. Metric Decrease: T15304 - - - - - 7922f728 by Teo Camarasu at 2026-02-11T21:50:58-05:00 ghc-internal: avoid depending on GHC.Internal.Exts This module is mostly just re-exports. It made sense as a user-facing module, but there's no good reason ghc-internal modules should depend on it and doing so linearises the module graph - move considerAccessible to GHC.Internal.Magic Previously it lived in GHC.Internal.Exts, but it really deserves to live along with the other magic function, which are already re-exported from .Exts - move maxTupleSize to GHC.Internal.Tuple This previously lived in GHC.Internal.Exts but a comment already said it should be moved to .Tuple Resolves #26832 - - - - - b6a4a29b by Eric Lee at 2026-02-11T21:51:55-05:00 Remove unused Semigroup imports to fix GHC 9.14 bootstrapping - - - - - 99d8c146 by Simon Peyton Jones at 2026-02-12T17:36:59+00:00 Fix subtle bug in cast worker/wrapper See (CWw4) in Note [Cast worker/wrapper]. The true payload is in the change to the definition of GHC.Types.Id.Info.hasInlineUnfolding Everthing else is just documentation. There is a 2% compile time decrease for T13056; I'll take the win! Metric Decrease: T13056 - - - - - 530e8e58 by Simon Peyton Jones at 2026-02-12T20:17:23-05:00 Add regression tests for four StaticPtr bugs Tickets #26545, #24464, #24773, #16981 are all solved by the recently-landed MR commit 318ee13bcffa6aa8df42ba442ccd92aa0f7e210c Author: Simon Peyton Jones <simon.peytonjones(a)gmail.com> Date: Mon Oct 20 23:07:20 2025 +0100 Simplify the treatment of static forms This MR just adds regression tests for them. - - - - - 4157160f by Cheng Shao at 2026-02-13T06:27:04-05:00 ci: remove unused hlint-ghc-and-base job definition This patch removes the unused `hlint-ghc-and-base` job definition, it's never run since !9806. Note that hadrian lint rules still work locally, so anyone that wishes to run hlint on the codebase can continue to do so in their local worktree. - - - - - 039f1977 by Cheng Shao at 2026-02-13T06:27:47-05:00 wasm: use import.meta.main for proper distinction of nodejs main modules This patch uses `import.meta.main` for proper distinction of nodejs main modules, especially when the main module might be installed as a symlink. Fixes #26916. - - - - - 14f485ee by ARATA Mizuki at 2026-02-17T09:09:24+09:00 Support more x86 extensions: AVX-512 {BW,DQ,VL} and GFNI Also, mark AVX-512 ER and PF as deprecated. AVX-512 instructions can be used for certain 64-bit integer vector operations. GFNI can be used to implement bitReverse (currently not used by NCG, but LLVM may use it). Closes #26406 Addresses #26509 - - - - - 016f79d5 by fendor at 2026-02-17T09:16:16-05:00 Hide implementation details from base exception stack traces Ensure we hide the implementation details of the exception throwing mechanisms: * `undefined` * `throwSTM` * `throw` * `throwIO` * `error` The `HasCallStackBacktrace` should always have a length of exactly 1, not showing internal implementation details in the stack trace, as these are vastly distracting to end users. CLC proposal [#387](https://github.com/haskell/core-libraries-committee/issues/387) - - - - - 4f2840f2 by Brian J. Cardiff at 2026-02-17T17:04:08-05:00 configure: Accept happy-2.2 In Jan 2026 happy-2.2 was released. The most sensible change is https://github.com/haskell/happy/issues/335 which didn't trigger in a fresh build - - - - - 10b4d364 by Duncan Coutts at 2026-02-17T17:04:52-05:00 Fix errors in the documentation of the eventlog STOP_THREAD status codes Fix the code for BlockedOnMsgThrowTo. Document all the known historical warts. Fixes issue #26867 - - - - - c5e15b8b by Phil de Joux at 2026-02-18T05:07:36-05:00 haddock: use snippets for all list examples - generate snippet output for docs - reduce font size to better fit snippets - Use only directive to guard html snippets - Add latex snippets for lists - - - - - d388bac1 by Phil de Joux at 2026-02-18T05:07:36-05:00 haddock: Place the snippet input and output together - Put the output seemingly inside the example box - - - - - 016fa306 by Samuel Thibault at 2026-02-18T05:08:35-05:00 Fix linking against libm by moving the -lm option For those systems that need -lm for getting math functions, this is currently added on the link line very early, before the object files being linked together. Newer toolchains enable --as-needed by default, which means -lm is ignored at that point because no object requires a math function yet. With such toolchains, we thus have to add -lm after the objects, so the linker actually includes libm in the link. - - - - - 68bd0805 by Teo Camarasu at 2026-02-18T05:09:19-05:00 ghc-internal: Move GHC.Internal.Data.Bool to base This is a tiny module that only defines bool :: Bool -> a -> a -> a. We can just move this to base and delete it from ghc-internal. If we want this functionality there we can just use a case statement or if-then expression. Resolves 26865 - - - - - 4c40df3d by fendor at 2026-02-20T10:24:48-05:00 Add optional `SrcLoc` to `StackAnnotation` class `StackAnnotation`s give access to an optional `SrcLoc` field that user-added stack annotations can use to provide better backtraces in both error messages and when decoding the callstack. We update builtin stack annotations such as `StringAnnotation` and `ShowAnnotation` to also capture the `SrcLoc` of the current `CallStack` to improve backtraces by default (if stack annotations are used). This change is backwards compatible with GHC 9.14.1. - - - - - fd9aaa28 by Simon Hengel at 2026-02-20T10:25:33-05:00 docs: Fix grammar in explicit_namespaces.rst - - - - - 44354255 by Vo Minh Thu at 2026-02-20T18:53:06-05:00 GHCi: add a :version command. This looks like: ghci> :version GHCi, version 9.11.20240322 This closes #24576. Co-Author: Markus Läll <markus.l2ll(a)gmail.com> - - - - - eab3dbba by Andreas Klebinger at 2026-02-20T18:53:51-05:00 hadrian/build-cabal: Better respect and utilize -j * We now respect -j<n> for the cabal invocation to build hadrian rather than hardcoding -j * We use the --semaphore flag to ensure cabal/ghc build the hadrian executable in parallel using the -jsem mechanism. Saves 10-15s on fresh builds for me. Fixes #26876 - - - - - 17839248 by Teo Camarasu at 2026-02-24T08:36:03-05:00 ghc-internal: avoid depending on GHC.Internal.Control.Monad.Fix This module contains the definition of MonadFix, since we want an instance for IO, that instance requires a lot of machinery and we want to avoid an orphan instance, this will naturally be quite high up in the dependency graph. So we want to avoid other modules depending on it as far as possible. On Windows, the IO manager depends on the RTSFlags type, which transtively depends on MonadFix. We refactor things to avoid this dependency, which would have caused a regression. Resolves #26875 Metric Decrease: T12227 - - - - - fa88d09a by Wolfgang Jeltsch at 2026-02-24T08:36:47-05:00 Refine the imports of `System.IO.OS` Commit 68bd08055594b8cbf6148a72d108786deb6c12a1 replaced the `GHC.Internal.Data.Bool` import by a `GHC.Internal.Base` import. However, while the `GHC.Internal.Data.Bool` import was conditional and partial, the `GHC.Internal.Base` import is unconditional and total. As a result, the import list is not tuned to import only the necessary bits anymore, and furthermore GHC emits a lot of warnings about redundant imports. This commit makes the `GHC.Internal.Base` import conditional and partial in the same way that the `GHC.Internal.Data.Bool` import was. - - - - - c951fef1 by Cheng Shao at 2026-02-25T20:58:28+00:00 wasm: add /assets endpoint to serve user-specified assets This patch adds an `/assets` endpoint to the wasm dyld http server, so that users can also fetch assets from the same host with sensible default MIME types, without needing a separate http server for assets that also introduces CORS headaches: - A `-fghci-browser-assets-dir` driver flag is added to specify the assets root directory (defaults to `$PWD`) - The dyld http server fetches `mime-db` on demand and uses it as source of truth for mime types. Closes #26951. - - - - - dde22f97 by Sylvain Henry at 2026-02-26T13:14:03-05:00 Fix -fcheck-prim-bounds for non constant args (#26958) Previously we were only checking bounds for constant (literal) arguments! I've refactored the code to simplify the generation of out-of-line Cmm code for the primop composed of some inline code + some call to an external Cmm function. - - - - - bd3eba86 by Vladislav Zavialov at 2026-02-27T05:48:01-05:00 Check for negative type literals in the type checker (#26861) GHC disallows negative type literals (e.g., -1), as tested by T8306 and T8412. This check is currently performed in the renamer: rnHsTyLit tyLit@(HsNumTy x i) = do when (i < 0) $ addErr $ TcRnNegativeNumTypeLiteral tyLit However, this check can be bypassed using RequiredTypeArguments (see the new test case T26861). Prior to this patch, such programs caused the compiler to hang instead of reporting a proper error. This patch addresses the issue by adding an equivalent check in the type checker, namely in tcHsType. The diff is deliberately minimal to facilitate backporting. A more comprehensive rework of HsTyLit is planned for a separate commit. - - - - - faf14e0c by Vladislav Zavialov at 2026-02-27T05:48:45-05:00 Consistent pretty-printing of HsString, HsIsString, HsStrTy Factor out a helper to pretty-print string literals, thus fixing newline handling for overloaded string literals and type literals. Test cases: T26860ppr T26860ppr_overloaded T26860ppr_tylit Follow up to ddf1434ff9bb08cfef3c93f23de6b83ec698aa27 - - - - - f108a972 by Arnaud Spiwack at 2026-02-27T12:53:01-05:00 Make list comprehension completely non-linear Fixes #25081 From the note: The usefulness of list comprehension in conjunction with linear types is dubious. After all, statements are made to be run many times, for instance in ```haskell [u | y <- [0,1], stmts] ``` both `u` and `stmts` are going to be run several times. In principle, though, there are some position in a monad comprehension expression which could be considered linear. We could try and make it so that these positions are considered linear by the typechecker, but in practice the desugarer doesn't take enough care to ensure that these are indeed desugared to linear sites. We tried in the past, and it turned out that we'd miss a desugaring corner case (#25772). Until there's a demand for this very specific improvement, let's instead be conservative, and consider list comprehension to be completely non-linear. - - - - - ae799cab by Simon Jakobi at 2026-02-27T12:53:54-05:00 PmAltConSet: Use Data.Set instead of Data.Map ...to store `PmLit`s. The Map was only used to map keys to themselves. Changing the Map to a Set saves a Word of memory per entry. Resolves #26756. - - - - - dcd7819c by Vladislav Zavialov at 2026-02-27T18:46:03-05:00 Drop HsTyLit in favor of HsLit (#26862, #25121) This patch is a small step towards unification of HsExpr and HsType, taking care of literals (HsLit) and type literals (HsTyLit). Additionally, it improves error messages for unsupported type literals, such as unboxed or fractional literals (test cases: T26862, T26862_th). Changes to the AST: * Use HsLit where HsTyLit was previously used * Use HsChar where HsCharTy was previously used * Use HsString where HsStrTy was previously used * Use HsNatural (NEW) where HsNumTy was previously used * Use HsDouble (NEW) to represent unsupported fractional type literals Changes to logic: * Parse unboxed and fractional type literals (to be rejected later) * Drop the check for negative literals in the renamer (rnHsTyLit) in favor of checking in the type checker (tc_hs_lit_ty) * Check for invalid type literals in TH (repTyLit) and report unrepresentable literals with ThUnsupportedTyLit * Allow negative type literals in TH (numTyLit). This is fine as these will be taken care of at splice time (test case: T8306_th) - - - - - c927954f by Vladislav Zavialov at 2026-02-27T18:46:50-05:00 Increase test coverage of diagnostics Add test cases for the previously untested diagnostics: [GHC-01239] PsErrIfInFunAppExpr [GHC-04807] PsErrProcInFunAppExpr [GHC-08195] PsErrInvalidRecordCon [GHC-16863] PsErrUnsupportedBoxedSumPat [GHC-18910] PsErrSemiColonsInCondCmd [GHC-24737] PsErrInvalidWhereBindInPatSynDecl [GHC-25037] PsErrCaseInFunAppExpr [GHC-25078] PsErrPrecedenceOutOfRange [GHC-28021] PsErrRecordSyntaxInPatSynDecl [GHC-35827] TcRnNonOverloadedSpecialisePragma [GHC-40845] PsErrUnpackDataCon [GHC-45106] PsErrInvalidInfixHole [GHC-50396] PsErrInvalidRuleActivationMarker [GHC-63930] MultiWayIfWithoutAlts [GHC-65536] PsErrNoSingleWhereBindInPatSynDecl [GHC-67630] PsErrMDoInFunAppExpr [GHC-70526] PsErrLetCmdInFunAppCmd [GHC-77808] PsErrDoCmdInFunAppCmd [GHC-86934] ClassPE [GHC-90355] PsErrLetInFunAppExpr [GHC-91745] CasesExprWithoutAlts [GHC-92971] PsErrCaseCmdInFunAppCmd [GHC-95644] PsErrBangPatWithoutSpace [GHC-97005] PsErrIfCmdInFunAppCmd Remove unused error constructors: [GHC-44524] PsErrExpectedHyphen [GHC-91382] TcRnIllegalKindSignature - - - - - 3a9470fd by Torsten Schmits at 2026-02-27T18:47:34-05:00 Avoid expensive computation for debug logging in `mergeDatabases` when log level is low This computed and traversed a set intersection for every single dependency unconditionally. - - - - - ea4c2cbd by Brandon Chinn at 2026-02-27T16:22:38-08:00 Implement QualifiedStrings (#26503) See Note [Implementation of QualifiedStrings] - - - - - 08bc245b by sheaf at 2026-03-01T11:11:54-05:00 Clean up join points, casts & ticks This commit shores up the logic dealing with casts and ticks occurring in between a join point binding and a jump. Fixes #26642 #26929 #26693 Makes progress on #14610 #26157 #26422 Changes: - Remove 'GHC.Types.Tickish.TickishScoping' in favour of simpler predicates 'tickishHasNoScope'/'tickishHasSoftScope', as things were before commit 993975d3. This makes the code easier to read and document (fewer indirections). - Introduce 'canCollectArgsThroughTick' for consistent handling of ticks around PrimOps and other 'Id's that cannot be eta-reduced. See overhauled Note [Ticks and mandatory eta expansion]. - New Note [JoinId vs TailCallInfo] in GHC.Core.SimpleOpt that explains robustness of JoinId vs fragility of TailCallInfo. - Allow casts/non-soft-scoped ticks to occur in between a join point binder and a jump, but only in Core Prep. See Note [Join points, casts, and ticks] and Note [Join points, casts, and ticks... in Core Prep] in GHC.Core.Opt.Simplify.Iteration. Also update Core Lint to account for this. See Note [Linting join points with casts or ticks] in GHC.Core.Lint. - Update 'GHC.Core.Utils.mergeCaseAlts' to avoid pushing a cast in between a join point binding and its jumps. This fixes #26642. See the new (MC5) and (MC6) in Note [Merge Nested Cases]. - Update float out to properly handle source note ticks. They are now properly floated out instead of being discarded. This increases the number of ticks in certain tests with -g. Test cases: T26642 and TrickyJoins. Metric increase due to more source note ticks with -g: ------------------------- Metric Increase: libdir size_hello_artifact size_hello_unicode ------------------------- - - - - - 476c4cdf by Sean D. Gillespie at 2026-03-02T10:14:37-05:00 Add SIMD absolute value on x86 and LLVM On x86, absolute value of 32 bits or less is implemented with PABSB/PABSW/PABSD if SSSE3 is available. Otherwise, there is a fallback for SSE2. For 64 bit integers it uses VPABSQ, required by AVX-512VL, with fallbacks for SSE4.2 and SSE2. There is no dedicated instruction for floating point absolute value on x86, so it is simulated using bitwise AND. Absolute value for signed integers and floats are implemented by the "llvm.abs/llvm.fabs" standard library intrinsics. This implementation uses MachOps constructors, unlike non-vector floating point absolute value, which uses CallishMachOps. - - - - - 709448c0 by Sean D. Gillespie at 2026-03-02T10:14:46-05:00 Add SIMD floating point square root On x86, this is implemented with the SQRTPS and SQRTPD instructions. On LLVM, it uses the sqrt library intrinstic. - - - - - 0deadf66 by Sean D. Gillespie at 2026-03-02T10:14:47-05:00 Improve error message for SIMD on aarch64 When encountering vector literals on aarch64, previously it would throw: <no location info>: error: panic! (the 'impossible' happened) GHC version 9.15.20251219: getRegister' (CmmLit:CmmVec): Now it is more consistent with the other vector operations: <no location info>: error: sorry! (unimplemented feature or known bug) GHC version 9.15.20251219: SIMD operations on AArch64 currently require the LLVM backend - - - - - 7d64031b by Vladislav Zavialov at 2026-03-03T11:09:28-05:00 Replace maybeAddSpace with spaceIfSingleQuote Simplify pretty-printing of HsTypes by using spaceIfSingleQuote. This allows us to drop the unwieldy lhsTypeHasLeadingPromotionQuote helper function. Follow-up to 178c1fd830c78377ef5d338406a41e1d8eb5f0da - - - - - 598db847 by Wolfgang Jeltsch at 2026-03-06T06:25:25-05:00 Correct `hIsReadable` and `hIsWritable` for duplex handles This contribution implements CLC proposal #371. It changes `hIsReadable` and `hIsWritable` such that they always throw a respective exception when encountering a closed or semi-closed handle, not just in the case of a file handle. - - - - - b90201e5 by Wolfgang Jeltsch at 2026-03-06T06:25:25-05:00 Document `SemiClosedHandle` - - - - - c9df72b5 by Wolfgang Jeltsch at 2026-03-06T06:25:25-05:00 Tell users what “semi-closed” means for duplex handles - - - - - a8aa1868 by Ilias Tsitsimpis at 2026-03-06T06:26:29-05:00 Fix determinism of linker arguments The switch from Data.Map to UniqMap in 3b5be05ac29 introduced non-determinism in the order of packages passed to the linker. This resulted in non-reproducible builds where the DT_NEEDED entries in dynamic libraries were ordered differently across builds. Fix the regression by explicitly sorting the package list derived from UniqMap. Fixes #26838 - - - - - 9b64ad3a by Matthew Pickering at 2026-03-06T06:27:16-05:00 determinism: Use a deterministic renaming when writing bytecode files Now when writing the bytecode file, a counter and substitution are used to provide deterministic keys to local variables (rather than relying on uniques). This change ensures that `.gbc` are produced deterministically. Fixes #26499 - - - - - d29800e0 by Teo Camarasu at 2026-03-06T06:28:46-05:00 ghc-internal: delete Version hs-boot loop Version has a Read instance which needs Unicode but part of the Unicode interface is the unicode version. This is easy to resolve. We simply don't re-export the version from the Unicode module. Resolves #26940 - - - - - ad25af90 by Sylvain Henry at 2026-03-06T06:30:33-05:00 Linker: implement support for COMMON symbols (#6107) Add some support for COMMON symbols. We don't support common symbols having different sizes where the larger one is allocated after the smaller one. The linker will fail with an appropriate error message if it happens. - - - - - 3b59f158 by Cheng Shao at 2026-03-06T06:31:16-05:00 compiler: fix redundant import of GHC.Hs.Lit This patch removes a redundant import of `GHC.Hs.Lit` which causes a ghc build failure with validate flavours when bootstrapping from 9.14. Fixes #26972. - - - - - 148d36f3 by Cheng Shao at 2026-03-06T06:32:01-05:00 compiler: avoid unneeded traversals in GHC.Unit.State Following !15591, this patch avoids unneeded traversals in `reportCycles`/`reportUnusable` when log verbosity is below given threshold. Also applies `logVerbAtLeast` when appropriate. Co-authored-by: Codex <codex(a)openai.com> - - - - - 7e31367c by Cheng Shao at 2026-03-06T06:32:46-05:00 ghc-internal: fix redundant import in GHC.Internal.Event.Windows.ManagedThreadPool This patch fixes redundant import in `GHC.Internal.Event.Windows.ManagedThreadPool` that causes a compilation error when building windows target with validate flavours and bootstrapping from 9.14. Fixes #26976. - - - - - fc8b8e27 by sheaf at 2026-03-06T06:33:28-05:00 System.Info.fullCompilerVersion: add 'since' annot Fixes #26973 - - - - - c8238375 by Sylvain Henry at 2026-03-06T06:34:23-05:00 Hadrian: deprecate --bignum and automatically enable +native_bignum for JS Deprecate --bignum=... to select the bignum backend. It's only used to select the native backend, and this can be done with the +native_bignum flavour transformer. Additionally, we automatically enable +native_bignum for the JS target because the GMP backend isn't supported. - - - - - a3ac7074 by Sylvain Henry at 2026-03-06T06:35:17-05:00 JS: fix putEnum/fromEnum (#24593) Don't go through Word16 when serializing Enums. - - - - - 0b36e96c by Andreas Klebinger at 2026-03-06T06:35:58-05:00 Docs: Document -fworker-wrapper-cbv default setting. Fixes #26841 - - - - - eca445e7 by mangoiv at 2026-03-07T05:02:36-05:00 drop deb9/10 from CI, add deb13 debian 9 and 10 are end of life, hence we drop them from our CI, but we do add debian 13. Jobs that were previously run on 9 and 10 run on 13, too, jobs that were run on 10, are run on 11 now. Jobs that were previously run on debian 12 are run on debian 13 now. This MR also updates hadrian's bootstrap plans for that reason. Metric Decrease: T9872d - - - - - 12f8b829 by Luite Stegeman at 2026-03-07T05:03:33-05:00 Fix GHC.Internal.Prim haddock Haddock used to parse Haskell source to generate documentation, but switched to using interface files instead. This broke documentation of the GHC.Internal.Prim module, since it's a wired-in interface that didn't provide a document structure. This patch adds the missing document structure and updates genprimopcode to make the section headers and descriptions available. fixes #26954 - - - - - f87e5e57 by Luite Stegeman at 2026-03-07T05:03:33-05:00 Remove obsolete --make-haskell-source from genprimopcode Now that haddock uses the wired-in interface for GHC.Internal.Prim, the generated Haskell source file is no longer needed. Remove the --make-haskell-source code generator from genprimopcode and replace the generated GHC/Internal/Prim.hs with a minimal static source file. - - - - - 4a7ddc7b by Sylvain Henry at 2026-03-07T05:04:59-05:00 JS: fix linking of exposed but non-preload units (#24886) Units exposed in the unit database but not explicitly passed on the command-line were not considered by the JS linker. This isn't an issue for cabal which passes every unit explicitly but it is an issue when using GHC directly (cf T24886 test). - - - - - 689aafcd by mangoiv at 2026-03-07T05:05:52-05:00 testsuite: double foundation timeout multiplier The runtime timeout in the foundation test was regularly hit by code generated by the wasm backend - we increase the timout since the high runtime is expected on the wasm backend for this rather complex test. Resolves #26938 - - - - - a46a1bb1 by Cheng Shao at 2026-03-09T04:50:30-04:00 compiler: add myCapabilityExpr to GHC.Cmm.Utils This commit adds `myCapabilityExpr` to `GHC.Cmm.Utils` which is computed from `BaseReg`. It's convenient for codegen logic where one needs to pass the current Capability's pointer. - - - - - 4afc65b1 by Cheng Shao at 2026-03-09T04:50:30-04:00 compiler: lower tryPutMVar# into a ccall directly This patch addresses an old TODO of `stg_tryPutMVarzh` by removing it completely and making the compiler lower `tryPutMVar#` into a ccall to `performTryPutMVar` directly, without landing into an intermediate C or Cmm function. `performTryPutMVar` is promoted to a public RTS function with default visibility, and the compiler lowering logic takes into account the C ABI of `performTryPutMVar` and converts from C Bool to primop's `Int#` result properly. - - - - - 9e3d6a58 by Simon Hengel at 2026-03-09T04:51:15-04:00 Don't use #line in haddocks This confuses the parser. Haddock output is unaffected by this change. (read: this still produces the same documentation) - - - - - f4e8fec2 by Wolfgang Jeltsch at 2026-03-09T04:52:01-04:00 Remove in-package dependencies on `GHC.Internal.System.IO` This contribution eliminates all dependencies on `GHC.Internal.System.IO` from within `ghc-internal`. It comprises the following changes: * Make `GHC.Internal.Fingerprint` independent of I/O support * Tighten the dependencies of `GHC.Internal.Data.Version` * Tighten the dependencies of `GHC.Internal.TH.Monad` * Tighten the dependencies of `GHCi.Helpers` * Move some code that needs `System.IO` to `template-haskell` * Move the `GHC.ResponseFile` implementation into `base` * Move the `System.Exit` implementation into `base` * Move the `System.IO.OS` implementation into `base` Metric Decrease: size_hello_artifact size_hello_artifact_gzip size_hello_unicode size_hello_unicode_gzip - - - - - 91df4c82 by Sylvain Henry at 2026-03-09T04:53:20-04:00 T18832: fix Windows CI failure by dropping removeDirectoryRecursive On Windows, open file handles prevent deletion. After killThread, the closer thread may not have called hClose yet, causing removeDirectoryRecursive to fail with "permission denied". The test harness cleans up the run directory anyway, so the call is redundant. - - - - - d7fe9671 by Cheng Shao at 2026-03-09T04:54:04-04:00 compiler: fix redundant import in GHC.StgToJS.Object This patch fixes a redundant import in GHC.StgToJS.Object that causes a build failure when compiling head from 9.14 with validate flavours. Fixes #26991. - - - - - 0bfd29c3 by Cheng Shao at 2026-03-09T04:54:46-04:00 wasm: fix `Illegal foreign declaration` failure when ghci loads modules with JSFFI exports This patch fixes a wasm ghci error when loading modules with JSFFI exports; the `backendValidityOfCExport` check in `tcCheckFEType` should only makes sense and should be performed when not checking the JavaScript calling convention; otherwise, when the calling convention is JavaScript, the codegen logic should be trusted to backends that actually make use of it. Fixes #26998. - - - - - e659610c by Duncan Coutts at 2026-03-09T12:08:35-04:00 Apply NOINLINE pragmas to generated Typeable bindings For context, see the existing Note [Grand plan for Typeable] and the Note [NOINLINE on generated Typeable bindings] added in the subsequent commit. This is about reducing the number of exported top level names and unfoldings, which reduces interface file sizes and reduces the number of global/dynamic linker symbols. Also accept the changed test output and metric decreases. Tests that record the phase output for type checking or for simplifier end up with different output: the generated bindings now have an Inline [~] annotation, and many top level names are now local rather than module-prefixed for export. Also accept the numerous metric decreases in compile_time/bytes allocated, and a few in compile_time/max_bytes_used. There's also one instance of a decrease in runtime/max_bytes_used but it's a ghci-way test and so presumably the reason is that it loads smaller .hi files and/or links fewer symbols. ------------------------- Metric Decrease: CoOpt_Singletons MultiLayerModulesTH_OneShot MultilineStringsPerf T10421 T10547 T12150 T12227 T12234 T12425 T13035 T13056 T13253 T13253-spj T15304 T15703 T16875 T17836b T17977b T18140 T18223 T18282 T18304 T18698a T18698b T18730 T18923 T20049 T21839c T24471 T24582 T24984 T3064 T4029 T5030 T5642 T5837 T6048 T9020 T9198 T9961 TcPlugin_RewritePerf WWRec hard_hole_fits mhu-perf ------------------------- - - - - - 67df5161 by Duncan Coutts at 2026-03-09T12:08:35-04:00 Add documentation Note [NOINLINE on generated Typeable bindings] and refer to it from the code and existing documentation. - - - - - c4ad6167 by Duncan Coutts at 2026-03-09T12:08:35-04:00 Switch existing note to "named wrinkle" style, (GPT1)..(GPT7) GPT = Grand plan for Typeable - - - - - dc84f8e2 by Cheng Shao at 2026-03-09T12:09:21-04:00 ci: only build deb13 for validate pipeline aarch64-linux jobs This patch drops the redundant aarch64-linux deb12 job from validate pipelines and only keeps deb13; it's still built in nightly/release pipelines. Closes #27004. - - - - - 23a50772 by Rajkumar Natarajan at 2026-03-10T14:11:37-04:00 chore: Merge GHC.Internal.TH.Quote into GHC.Internal.TH.Monad Move the QuasiQuoter datatype from GHC.Internal.TH.Quote to GHC.Internal.TH.Monad and delete the Quote module. Update submodule template-haskell-quasiquoter to use the merged upstream version that imports from the correct module. Co-authored-by: Cursor <cursoragent(a)cursor.com> - - - - - a2bb6fc3 by Simon Jakobi at 2026-03-10T14:12:23-04:00 Add regression test for #16122 - - - - - 604e1180 by Cheng Shao at 2026-03-11T15:00:42-04:00 hadrian: remove the broken bench flavour This patch removes the bench flavour from hadrian which has been broken for years and not used for actual benchmarking (for which `perf`/`release` is used instead). Closes #26825. - - - - - c3e64915 by Simon Jakobi at 2026-03-11T15:01:31-04:00 Add regression test for #18186 The original TypeInType language extension is replaced with DataKinds+PolyKinds for compatibility. Closes #18186. - - - - - 664996c7 by Andreas Klebinger at 2026-03-11T15:02:16-04:00 Bump nofib submodule. We accrued a number of nofib fixes we want to have here. - - - - - 517cf64e by Simon Jakobi at 2026-03-11T15:03:03-04:00 Add regression test for #15907 Closes #15907. - - - - - fff362cf by Simon Jakobi at 2026-03-11T15:03:49-04:00 Ensure T14272 is run in optasm way Closes #16539. - - - - - ec81ec2c by Simon Jakobi at 2026-03-11T15:03:49-04:00 Add regression test for #24632 Closes #24632. - - - - - cefec47b by Simon Jakobi at 2026-03-11T15:03:50-04:00 Fix module name of T9675: T6975 -> T9675 - - - - - d3690ae8 by Andreas Klebinger at 2026-03-11T15:04:31-04:00 User guide: Clarify phase control on INLINEABLE[foo] pragmas. Fixes #26851 - - - - - e7054934 by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #12694 Closes #12694. - - - - - 4756d9f6 by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #16275 Closes #16275. - - - - - 34b7e2c1 by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #14908 Closes #14908. - - - - - 4243db3d by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #14151 Closes #14151. - - - - - 0e9f1453 by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #12640 Closes #12640. - - - - - ae606c7f by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #15588 Closes #15588. - - - - - 5a38ce4e by Simon Jakobi at 2026-03-11T15:05:16-04:00 Add regression test for #9445 Closes #9445. - - - - - d054b467 by Cheng Shao at 2026-03-11T15:05:59-04:00 compiler: implement string interning logic for BCONPtrFS This patch adds a `FastStringEnv`-based cache of `MallocStrings` requests to `Interp`, so that when we load bytecode with many breakpoints that share the same module names & unit ids, we reuse the allocated remote pointers instead of issuing duplicte `MallocStrings` requests and bloating the C heap. Closes #26995. - - - - - b85a0293 by Simon Jakobi at 2026-03-11T15:06:41-04:00 Add perf test for #1216 Closes #1216. - - - - - cd7f7420 by Sylvain Henry at 2026-03-11T15:07:58-04:00 JS: check that tuple constructors are linked (#23709) Test js-mk_tup was failing before because tuple constructors weren't linked in. It's no longer an issue after the linker fixes. - - - - - d57f01a4 by Matthew Pickering at 2026-03-11T15:08:40-04:00 testsuite: Add test for foreign import prim with unboxed tuple return This commit just adds a test that foreign import prim works with unboxed sums. - - - - - 23d111ce by Matthew Pickering at 2026-03-11T15:08:41-04:00 Return a valid pointer in advanceStackFrameLocationzh When there is no next stack chunk, `advanceStackFrameLocationzh` used to return NULL in the pointer-typed StackSnapshot# result slot. Even though the caller treats that case as "no next frame", the result is still materialized in a GC-visible pointer slot. If a GC observes the raw NULL there, stack decoding can crash. Fix this by ensuring the dead pointer slot contains a valid closure pointer. Also make the optional result explicit by returning an unboxed sum instead of a tuple with a separate tag. Fixes #27009 - - - - - 4c58a3ae by Cheng Shao at 2026-03-11T15:09:22-04:00 hadrian: build profiled dynamic objects with -dynamic-too This patch enables hadrian to build profiled dynamic objects with `-dynamic-too`, addressing a build parallelism bottleneck in release pipelines. Closes #27010. - - - - - f661819d by Simon Peyton Jones at 2026-03-13T15:15:06+00:00 Better specialisation See #26831 Two changes: * Specialise on any visible dict even if it only contains coercions * Be more keen to inline functions that have class-ops - - - - - 1a60dc29 by Simon Peyton Jones at 2026-03-13T15:15:06+00:00 Remove unnecessary imports - - - - - b1e8b5e5 by Simon Peyton Jones at 2026-03-13T15:15:06+00:00 Revert the no-evidence specialiser changes - - - - - 69e21937 by Simon Peyton Jones at 2026-03-13T15:15:06+00:00 Do more eta expansion in Prep Needs documentation! - - - - - 06981488 by Simon Peyton Jones at 2026-03-13T15:15:06+00:00 Wibble - - - - - 19ba3d93 by Simon Peyton Jones at 2026-03-13T15:15:06+00:00 Comment out dead code - - - - - bcd61d44 by Simon Peyton Jones at 2026-03-13T15:15:06+00:00 Never eta-expand join points - - - - - d3447241 by Simon Peyton Jones at 2026-03-13T15:15:06+00:00 Never eta-expand a naked variable! - - - - - 935ee8f5 by Simon Peyton Jones at 2026-03-13T15:15:06+00:00 Immprove lambda handling in Prep All Lam in `body` rather than just `rhs`; indeed collapse the two. Then CoreToStg creates the lambda if needed - - - - - 0d8818bc by Simon Peyton Jones at 2026-03-13T15:15:06+00:00 Wibbles to eta expansion - - - - - e9c2c182 by Simon Peyton Jones at 2026-03-13T15:17:56+00:00 Wibbles - - - - - f26e0362 by Simon Peyton Jones at 2026-03-13T15:17:56+00:00 Remove dangling reference - - - - - 823 changed files: - .gitlab-ci.yml - .gitlab/ci.sh - .gitlab/darwin/nix/sources.json - .gitlab/darwin/toolchain.nix - + .gitlab/generate-ci/cabal.project - .gitlab/generate-ci/gen_ci.hs - .gitlab/jobs.yaml - .gitlab/rel_eng/fetch-gitlab-artifacts/fetch_gitlab.py - .gitlab/rel_eng/mk-ghcup-metadata/mk_ghcup_metadata.py - compiler/GHC/Builtin/Names.hs - compiler/GHC/Builtin/Names/TH.hs - compiler/GHC/Builtin/PrimOps.hs - compiler/GHC/Builtin/Types.hs - compiler/GHC/Builtin/Utils.hs - compiler/GHC/Builtin/primops.txt.pp - compiler/GHC/ByteCode/Linker.hs - compiler/GHC/ByteCode/Serialize.hs - compiler/GHC/Cmm/MachOp.hs - compiler/GHC/Cmm/Node.hs - compiler/GHC/Cmm/Utils.hs - compiler/GHC/CmmToAsm/AArch64/CodeGen.hs - compiler/GHC/CmmToAsm/Config.hs - compiler/GHC/CmmToAsm/LA64/CodeGen.hs - compiler/GHC/CmmToAsm/PPC/CodeGen.hs - compiler/GHC/CmmToAsm/X86/CodeGen.hs - compiler/GHC/CmmToAsm/X86/Instr.hs - compiler/GHC/CmmToAsm/X86/Ppr.hs - compiler/GHC/CmmToC.hs - compiler/GHC/CmmToLlvm/CodeGen.hs - compiler/GHC/Core.hs - compiler/GHC/Core/Coercion.hs - compiler/GHC/Core/FamInstEnv.hs - compiler/GHC/Core/InstEnv.hs - compiler/GHC/Core/Lint.hs - compiler/GHC/Core/Map/Type.hs - compiler/GHC/Core/Opt/Arity.hs - compiler/GHC/Core/Opt/FloatIn.hs - compiler/GHC/Core/Opt/FloatOut.hs - compiler/GHC/Core/Opt/OccurAnal.hs - compiler/GHC/Core/Opt/Pipeline.hs - compiler/GHC/Core/Opt/SetLevels.hs - compiler/GHC/Core/Opt/Simplify/Env.hs - compiler/GHC/Core/Opt/Simplify/Iteration.hs - compiler/GHC/Core/Opt/Simplify/Utils.hs - compiler/GHC/Core/Opt/WorkWrap.hs - compiler/GHC/Core/Predicate.hs - compiler/GHC/Core/SimpleOpt.hs - compiler/GHC/Core/TyCo/Rep.hs - compiler/GHC/Core/TyCo/Subst.hs - compiler/GHC/Core/TyCo/Tidy.hs - compiler/GHC/Core/TyCon.hs - compiler/GHC/Core/TyCon/RecWalk.hs - compiler/GHC/Core/Unfold.hs - compiler/GHC/Core/Utils.hs - compiler/GHC/CoreToStg.hs - compiler/GHC/CoreToStg/AddImplicitBinds.hs - compiler/GHC/CoreToStg/Prep.hs - compiler/GHC/Data/Maybe.hs - compiler/GHC/Data/Pair.hs - compiler/GHC/Driver/Config/CmmToAsm.hs - compiler/GHC/Driver/Config/Core/Lint.hs - compiler/GHC/Driver/Config/Interpreter.hs - compiler/GHC/Driver/DynFlags.hs - compiler/GHC/Driver/Flags.hs - compiler/GHC/Driver/Main.hs - compiler/GHC/Driver/Pipeline/Execute.hs - compiler/GHC/Driver/Session.hs - compiler/GHC/Hs/Binds.hs - compiler/GHC/Hs/Decls.hs - + compiler/GHC/Hs/Decls/Overlap.hs - compiler/GHC/Hs/Doc.hs - compiler/GHC/Hs/Expr.hs - compiler/GHC/Hs/Instances.hs - compiler/GHC/Hs/Lit.hs - compiler/GHC/Hs/Pat.hs - compiler/GHC/Hs/Syn/Type.hs - compiler/GHC/Hs/Type.hs - compiler/GHC/Hs/Utils.hs - compiler/GHC/HsToCore.hs - compiler/GHC/HsToCore/Docs.hs - compiler/GHC/HsToCore/Errors/Ppr.hs - 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utils/haddock/html-test/ref/FunArgs.html - utils/haddock/html-test/ref/Hash.html - utils/haddock/html-test/ref/Instances.html - utils/haddock/html-test/ref/LinearTypes.html - utils/haddock/html-test/ref/RedactTypeSynonyms.html - utils/haddock/html-test/ref/T23616.html - utils/haddock/html-test/ref/Test.html - utils/haddock/html-test/ref/TypeFamilies3.html - utils/jsffi/dyld.mjs - utils/jsffi/post-link.mjs The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/9ce260b384d681dd5b51e58cf5ea04… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/9ce260b384d681dd5b51e58cf5ea04… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/T26831] Remove dangling reference
by Simon Peyton Jones (＠simonpj) 13 Mar '26

13 Mar '26

Simon Peyton Jones pushed to branch wip/T26831 at Glasgow Haskell Compiler / GHC Commits: 9ce260b3 by Simon Peyton Jones at 2026-03-13T15:13:58+00:00 Remove dangling reference - - - - - 1 changed file: - compiler/GHC/Core/Opt/Arity.hs Changes: ===================================== compiler/GHC/Core/Opt/Arity.hs ===================================== @@ -2552,9 +2552,6 @@ This reduces clutter, sometimes a lot. See Note [Do not eta-expand PAPs] in GHC.Core.Opt.Simplify.Utils, where we are careful not to eta-expand a PAP. If eta-expanding is bad, then eta-reducing is good! -Also the code generator likes eta-reduced PAPs; see GHC.CoreToStg.Prep -Note [No eta reduction needed in rhsToBody]. - But note that we don't want to eta-reduce \x y. f <expensive> x y to View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/9ce260b384d681dd5b51e58cf5ea043… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/9ce260b384d681dd5b51e58cf5ea043… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/jeltsch/text-read-uncovering] 6 commits: Move the `System.IO` implementation into `base`
by Wolfgang Jeltsch (＠jeltsch) 13 Mar '26

13 Mar '26

Wolfgang Jeltsch pushed to branch wip/jeltsch/text-read-uncovering at Glasgow Haskell Compiler / GHC Commits: fca4d682 by Wolfgang Jeltsch at 2026-03-13T16:56:51+02:00 Move the `System.IO` implementation into `base` - - - - - 75594c7f by Wolfgang Jeltsch at 2026-03-13T16:58:44+02:00 Move I/O-related `Read` instances into `base` - - - - - 2c759ff3 by Wolfgang Jeltsch at 2026-03-13T16:58:44+02:00 Move most of the `Numeric` implementation into `base` The `showHex` operation and the `showIntAtBase` operation, which underlies it, are kept in `GHC.Internal.Numeric`, because `showHex` is used in a few places in `ghc-internal`; everything else is moved. - - - - - 18478fd1 by Wolfgang Jeltsch at 2026-03-13T16:58:44+02:00 Move the instance `Read ByteOrder` into `base` - - - - - 62c6a1ca by Wolfgang Jeltsch at 2026-03-13T16:58:44+02:00 Move the implementation of version parsing into `base` - - - - - 96892ac7 by Wolfgang Jeltsch at 2026-03-13T16:58:45+02:00 Move the implementation of `readConstr` into `base` - - - - - 20 changed files: - libraries/base/src/Data/Data.hs - libraries/base/src/Data/Version.hs - libraries/base/src/GHC/ByteOrder.hs - libraries/base/src/GHC/IO/Handle.hs - libraries/base/src/Numeric.hs - libraries/base/src/Prelude.hs - libraries/base/src/System/IO.hs - libraries/base/src/Text/Printf.hs - libraries/ghc-internal/src/GHC/Internal/ByteOrder.hs - libraries/ghc-internal/src/GHC/Internal/Data/Data.hs - libraries/ghc-internal/src/GHC/Internal/Data/Version.hs - libraries/ghc-internal/src/GHC/Internal/IO/Device.hs - libraries/ghc-internal/src/GHC/Internal/IO/Handle/Types.hs - libraries/ghc-internal/src/GHC/Internal/IO/IOMode.hs - libraries/ghc-internal/src/GHC/Internal/Numeric.hs - libraries/ghc-internal/src/GHC/Internal/System/IO.hs - testsuite/tests/interface-stability/base-exports.stdout - testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs - testsuite/tests/interface-stability/base-exports.stdout-mingw32 - testsuite/tests/interface-stability/base-exports.stdout-ws-32 Changes: ===================================== libraries/base/src/Data/Data.hs ===================================== @@ -99,3 +99,38 @@ module Data.Data ( import GHC.Internal.Data.Data import Data.Typeable + +import GHC.Real (toRational) +import GHC.Float (Double) +import Data.Eq ((==)) +import Data.Function ((.)) +import Data.Maybe (Maybe (Nothing, Just)) +import Data.List (filter) +import Data.String (String) +import Text.Read (Read, reads) + +-- | Lookup a constructor via a string +readConstr :: DataType -> String -> Maybe Constr +readConstr dt str = + case dataTypeRep dt of + AlgRep cons -> idx cons + IntRep -> mkReadCon (\i -> (mkPrimCon dt str (IntConstr i))) + FloatRep -> mkReadCon ffloat + CharRep -> mkReadCon (\c -> (mkPrimCon dt str (CharConstr c))) + NoRep -> Nothing + where + + -- Read a value and build a constructor + mkReadCon :: Read t => (t -> Constr) -> Maybe Constr + mkReadCon f = case (reads str) of + [(t,"")] -> Just (f t) + _ -> Nothing + + -- Traverse list of algebraic datatype constructors + idx :: [Constr] -> Maybe Constr + idx cons = case filter ((==) str . showConstr) cons of + [] -> Nothing + hd : _ -> Just hd + + ffloat :: Double -> Constr + ffloat = mkPrimCon dt str . FloatConstr . toRational ===================================== libraries/base/src/Data/Version.hs ===================================== @@ -1,5 +1,7 @@ {-# LANGUAGE Safe #-} +{-# LANGUAGE StandaloneDeriving #-} + -- | -- Module : Data.Version -- Copyright : (c) The University of Glasgow 2004 @@ -33,3 +35,25 @@ module Data.Version ( ) where import GHC.Internal.Data.Version + +import Control.Applicative (pure, (*>)) +import Data.Functor (fmap) +import Data.Char (isDigit, isAlphaNum) +import Text.ParserCombinators.ReadP (ReadP, char, munch1, sepBy1, many) +import Text.Read (Read, read) + +{-NOTE: + The following instance is technically an orphan, but practically it is not, + since ordinary users should not use @ghc-internal@ directly and thus get + 'Version' only through this module. +-} + +-- | @since base-2.01 +deriving instance Read Version + +-- | A parser for versions in the format produced by 'showVersion'. +-- +parseVersion :: ReadP Version +parseVersion = do branch <- sepBy1 (fmap read (munch1 isDigit)) (char '.') + tags <- many (char '-' *> munch1 isAlphaNum) + pure Version{versionBranch=branch, versionTags=tags} ===================================== libraries/base/src/GHC/ByteOrder.hs ===================================== @@ -1,5 +1,7 @@ {-# LANGUAGE Safe #-} +{-# LANGUAGE StandaloneDeriving #-} + -- | -- -- Module : GHC.ByteOrder @@ -19,4 +21,15 @@ module GHC.ByteOrder targetByteOrder ) where -import GHC.Internal.ByteOrder \ No newline at end of file +import GHC.Internal.ByteOrder + +import Text.Read + +{-NOTE: + The following instance is technically an orphan, but practically it is not, + since ordinary users should not use @ghc-internal@ directly and thus get + 'ByteOrder' only through this module. +-} + +-- | @since base-4.11.0.0 +deriving instance Read ByteOrder ===================================== libraries/base/src/GHC/IO/Handle.hs ===================================== @@ -53,6 +53,7 @@ module GHC.IO.Handle hGetEcho, hIsTerminalDevice, hSetNewlineMode, + hGetNewlineMode, Newline(..), NewlineMode(..), nativeNewline, ===================================== libraries/base/src/Numeric.hs ===================================== @@ -1,4 +1,6 @@ -{-# LANGUAGE Safe #-} +{-# LANGUAGE Trustworthy #-} +{-# LANGUAGE MagicHash #-} +{-# LANGUAGE ImportQualifiedPost #-} -- | -- @@ -48,3 +50,279 @@ module Numeric ) where import GHC.Internal.Numeric + +import GHC.Types (Char (C#)) +import GHC.Err (error, errorWithoutStackTrace) +import GHC.Base (unsafeChr) +import GHC.Num (Num, (+), (-), (*)) +import GHC.Real + ( + Integral, + Real, + RealFrac, + fromIntegral, + fromRational, + quotRem, + showSigned + ) +import GHC.Float + ( + Floating (..), + RealFloat, + Float, + Double, + isNegativeZero, + isInfinite, + isNaN, + fromRat, + floatToDigits, + FFFormat (FFExponent, FFFixed, FFGeneric), + formatRealFloat, + formatRealFloatAlt, + showFloat + ) +import GHC.Read (lexDigits) +import Control.Monad (return) +import Data.Eq (Eq, (==)) +import Data.Ord ((<)) +import Data.Function (($), (.)) +import Data.Bool (Bool (False, True), otherwise, (||), (&&)) +import Data.Maybe (Maybe) +import Data.List ((++)) +import Data.Char (ord, intToDigit) +import Data.Int (Int) +import Text.ParserCombinators.ReadP (ReadP, pfail, readP_to_S) +import Text.Read (ReadS, readParen, lex) +import Text.Read.Lex qualified as L + ( + Lexeme (Number), + lex, + numberToRational, + readIntP, + readBinP, + readOctP, + readDecP, + readHexP + ) +import Text.Show (ShowS, show, showString) + +-- $setup +-- >>> import Prelude + +-- ----------------------------------------------------------------------------- +-- Reading + +-- | Reads an /unsigned/ integral value in an arbitrary base. +readInt :: Num a + => a -- ^ the base + -> (Char -> Bool) -- ^ a predicate distinguishing valid digits in this base + -> (Char -> Int) -- ^ a function converting a valid digit character to an 'Int' + -> ReadS a +readInt base isDigit valDigit = readP_to_S (L.readIntP base isDigit valDigit) + +-- | Read an unsigned number in binary notation. +-- +-- >>> readBin "10011" +-- [(19,"")] +readBin :: (Eq a, Num a) => ReadS a +readBin = readP_to_S L.readBinP + +-- | Read an unsigned number in octal notation. +-- +-- >>> readOct "0644" +-- [(420,"")] +readOct :: (Eq a, Num a) => ReadS a +readOct = readP_to_S L.readOctP + +-- | Read an unsigned number in decimal notation. +-- +-- >>> readDec "0644" +-- [(644,"")] +readDec :: (Eq a, Num a) => ReadS a +readDec = readP_to_S L.readDecP + +-- | Read an unsigned number in hexadecimal notation. +-- Both upper or lower case letters are allowed. +-- +-- >>> readHex "deadbeef" +-- [(3735928559,"")] +readHex :: (Eq a, Num a) => ReadS a +readHex = readP_to_S L.readHexP + +-- | Reads an /unsigned/ 'RealFrac' value, +-- expressed in decimal scientific notation. +-- +-- Note that this function takes time linear in the magnitude of its input +-- which can scale exponentially with input size (e.g. @"1e100000000"@ is a +-- very large number while having a very small textual form). +-- For this reason, users should take care to avoid using this function on +-- untrusted input. Users needing to parse floating point values +-- (e.g. 'Float') are encouraged to instead use 'read', which does +-- not suffer from this issue. +readFloat :: RealFrac a => ReadS a +readFloat = readP_to_S readFloatP + +readFloatP :: RealFrac a => ReadP a +readFloatP = + do tok <- L.lex + case tok of + L.Number n -> return $ fromRational $ L.numberToRational n + _ -> pfail + +-- It's turgid to have readSigned work using list comprehensions, +-- but it's specified as a ReadS to ReadS transformer +-- With a bit of luck no one will use it. + +-- | Reads a /signed/ 'Real' value, given a reader for an unsigned value. +readSigned :: (Real a) => ReadS a -> ReadS a +readSigned readPos = readParen False read' + where read' r = read'' r ++ + (do + ("-",s) <- lex r + (x,t) <- read'' s + return (-x,t)) + read'' r = do + (str,s) <- lex r + (n,"") <- readPos str + return (n,s) + +-- ----------------------------------------------------------------------------- +-- Showing + +-- | Show /non-negative/ 'Integral' numbers in base 10. +showInt :: Integral a => a -> ShowS +showInt n0 cs0 + | n0 < 0 = errorWithoutStackTrace "GHC.Internal.Numeric.showInt: can't show negative numbers" + | otherwise = go n0 cs0 + where + go n cs + | n < 10 = case unsafeChr (ord '0' + fromIntegral n) of + c@(C# _) -> c:cs + | otherwise = case unsafeChr (ord '0' + fromIntegral r) of + c@(C# _) -> go q (c:cs) + where + (q,r) = n `quotRem` 10 + +-- Controlling the format and precision of floats. The code that +-- implements the formatting itself is in @PrelNum@ to avoid +-- mutual module deps. + +{-# SPECIALIZE showEFloat :: + Maybe Int -> Float -> ShowS #-} +{-# SPECIALIZE showEFloat :: + Maybe Int -> Double -> ShowS #-} +{-# SPECIALIZE showFFloat :: + Maybe Int -> Float -> ShowS #-} +{-# SPECIALIZE showFFloat :: + Maybe Int -> Double -> ShowS #-} +{-# SPECIALIZE showGFloat :: + Maybe Int -> Float -> ShowS #-} +{-# SPECIALIZE showGFloat :: + Maybe Int -> Double -> ShowS #-} + +-- | Show a signed 'RealFloat' value +-- using scientific (exponential) notation (e.g. @2.45e2@, @1.5e-3@). +-- +-- In the call @'showEFloat' digs val@, if @digs@ is 'Nothing', +-- the value is shown to full precision; if @digs@ is @'Just' d@, +-- then at most @d@ digits after the decimal point are shown. +showEFloat :: (RealFloat a) => Maybe Int -> a -> ShowS + +-- | Show a signed 'RealFloat' value +-- using standard decimal notation (e.g. @245000@, @0.0015@). +-- +-- In the call @'showFFloat' digs val@, if @digs@ is 'Nothing', +-- the value is shown to full precision; if @digs@ is @'Just' d@, +-- then at most @d@ digits after the decimal point are shown. +showFFloat :: (RealFloat a) => Maybe Int -> a -> ShowS + +-- | Show a signed 'RealFloat' value +-- using standard decimal notation for arguments whose absolute value lies +-- between @0.1@ and @9,999,999@, and scientific notation otherwise. +-- +-- In the call @'showGFloat' digs val@, if @digs@ is 'Nothing', +-- the value is shown to full precision; if @digs@ is @'Just' d@, +-- then at most @d@ digits after the decimal point are shown. +showGFloat :: (RealFloat a) => Maybe Int -> a -> ShowS + +showEFloat d x = showString (formatRealFloat FFExponent d x) +showFFloat d x = showString (formatRealFloat FFFixed d x) +showGFloat d x = showString (formatRealFloat FFGeneric d x) + +-- | Show a signed 'RealFloat' value +-- using standard decimal notation (e.g. @245000@, @0.0015@). +-- +-- This behaves as 'showFFloat', except that a decimal point +-- is always guaranteed, even if not needed. +-- +-- @since base-4.7.0.0 +showFFloatAlt :: (RealFloat a) => Maybe Int -> a -> ShowS + +-- | Show a signed 'RealFloat' value +-- using standard decimal notation for arguments whose absolute value lies +-- between @0.1@ and @9,999,999@, and scientific notation otherwise. +-- +-- This behaves as 'showFFloat', except that a decimal point +-- is always guaranteed, even if not needed. +-- +-- @since base-4.7.0.0 +showGFloatAlt :: (RealFloat a) => Maybe Int -> a -> ShowS + +showFFloatAlt d x = showString (formatRealFloatAlt FFFixed d True x) +showGFloatAlt d x = showString (formatRealFloatAlt FFGeneric d True x) + +{- | Show a floating-point value in the hexadecimal format, +similar to the @%a@ specifier in C's printf. + + >>> showHFloat (212.21 :: Double) "" + "0x1.a86b851eb851fp7" + >>> showHFloat (-12.76 :: Float) "" + "-0x1.9851ecp3" + >>> showHFloat (-0 :: Double) "" + "-0x0p+0" + +@since base-4.11.0.0 +-} +showHFloat :: RealFloat a => a -> ShowS +showHFloat = showString . fmt + where + fmt x + | isNaN x = "NaN" + | isInfinite x = (if x < 0 then "-" else "") ++ "Infinity" + | x < 0 || isNegativeZero x = '-' : cvt (-x) + | otherwise = cvt x + + cvt x + | x == 0 = "0x0p+0" + | otherwise = + case floatToDigits 2 x of + r@([], _) -> error $ "Impossible happened: showHFloat: " ++ show r + (d:ds, e) -> "0x" ++ show d ++ frac ds ++ "p" ++ show (e-1) + + -- Given binary digits, convert them to hex in blocks of 4 + -- Special case: If all 0's, just drop it. + frac digits + | allZ digits = "" + | otherwise = "." ++ hex digits + where + hex ds = + case ds of + [] -> "" + [a] -> hexDigit a 0 0 0 "" + [a,b] -> hexDigit a b 0 0 "" + [a,b,c] -> hexDigit a b c 0 "" + a : b : c : d : r -> hexDigit a b c d (hex r) + + hexDigit a b c d = showHex (8*a + 4*b + 2*c + d) + + allZ xs = case xs of + x : more -> x == 0 && allZ more + [] -> True + +-- | Show /non-negative/ 'Integral' numbers in base 8. +showOct :: Integral a => a -> ShowS +showOct = showIntAtBase 8 intToDigit + +-- | Show /non-negative/ 'Integral' numbers in base 2. +showBin :: Integral a => a -> ShowS +showBin = showIntAtBase 2 intToDigit ===================================== libraries/base/src/Prelude.hs ===================================== @@ -165,7 +165,7 @@ module Prelude ( ) where import GHC.Internal.Control.Monad -import GHC.Internal.System.IO +import System.IO import GHC.Internal.System.IO.Error import qualified GHC.Internal.Data.List as List import GHC.Internal.Data.Either ===================================== libraries/base/src/System/IO.hs ===================================== @@ -1,4 +1,6 @@ -{-# LANGUAGE Safe #-} +{-# LANGUAGE Trustworthy #-} +{-# LANGUAGE CPP #-} +{-# LANGUAGE StandaloneDeriving #-} -- | -- @@ -184,8 +186,666 @@ module System.IO nativeNewlineMode ) where -import GHC.Internal.System.IO +import GHC.Internal.System.IO (putStrLn, print) + +import GHC.Base (Bool (False, True), otherwise, failIO) +import GHC.Err (errorWithoutStackTrace) +import GHC.List (null, elem, last, (++), reverse, break) +import GHC.Num ((+)) +import GHC.IO (IO, FilePath) +import GHC.IO.IOMode (IOMode (ReadMode, WriteMode, ReadWriteMode, AppendMode)) +import qualified GHC.Internal.IO.FD as FD +import GHC.IO.Encoding + ( + TextEncoding, + mkTextEncoding, + getLocaleEncoding, + initLocaleEncoding, + utf8, + utf8_bom, + utf16, + utf16be, + utf16le, + utf32, + utf32be, + utf32le, + latin1, + char8 + ) +import GHC.IO.Handle + ( + Handle, + hLookAhead, + hFlush, + hClose, + hSetBinaryMode, + hSetEncoding, + hSetNewlineMode, + hSetEcho, + hSetFileSize, + hGetEncoding, + hGetNewlineMode, + hGetEcho, + hFileSize, + hIsOpen, + hIsReadable, + hIsSeekable, + hIsWritable, + hIsTerminalDevice, + hIsEOF, + hIsClosed, + hShow, + BufferMode (NoBuffering, LineBuffering, BlockBuffering), + hSetBuffering, + hGetBuffering, + HandlePosn, + hSetPosn, + hGetPosn, + SeekMode (AbsoluteSeek, RelativeSeek, SeekFromEnd), + hSeek, + hTell, + Newline (LF, CRLF), + nativeNewline, + NewlineMode (NewlineMode, inputNL, outputNL), + noNewlineTranslation, + nativeNewlineMode, + universalNewlineMode, + isEOF + ) +import GHC.IO.Handle.Text + ( + hPutChar, + hPutStr, + hPutStrLn, + hPutBuf, + hPutBufNonBlocking, + hGetChar, + hGetContents, + hGetContents', + hGetLine, + hGetBuf, + hGetBufNonBlocking, + hGetBufSome, + hWaitForInput + ) +import qualified GHC.Internal.IO.Handle.FD as POSIX +import GHC.IO.StdHandles + ( + openBinaryFile, + withBinaryFile, + openFile, + withFile, + stdin, + stdout, + stderr + ) +import GHC.IORef (atomicModifyIORef'_) import GHC.Internal.Control.Monad.Fix (fixIO) +import Control.Monad (return, (>>=)) +import Control.Exception (ioError) +import Data.Eq ((==)) +import Data.Ord ((<)) +import Data.Bits ((.|.)) +import Data.Function (($), (.)) +import Data.Maybe (Maybe (Nothing, Just)) +import Data.Char (Char) +import Data.String (String) +import Data.Int (Int) +import Data.IORef (IORef, newIORef) +import System.IO.Error (userError) +import System.IO.Unsafe (unsafePerformIO) +import System.Posix.Internals + ( + c_getpid, + c_open, + o_CREAT, + o_EXCL, + o_BINARY, + o_NONBLOCK, + o_RDWR, + o_NOCTTY, + withFilePath + ) +import System.Posix.Types (CMode) +import Text.Read (lex, Read, reads) +import Text.Show (Show, show) +import Foreign.C.Types (CInt) +import Foreign.C.Error (Errno, eEXIST, getErrno, errnoToIOError) + +#if defined(mingw32_HOST_OS) +import GHC.IO.SubSystem +import GHC.IO.Windows.Handle (openFileAsTemp) +import GHC.IO.Handle.Windows (mkHandleFromHANDLE) +import GHC.IO.Device as IODevice +import GHC.Internal.Real (fromIntegral) +import Foreign.C.String +import Foreign.Ptr +import Foreign.Marshal.Alloc +import Foreign.Marshal.Utils (with) +import Foreign.Storable +#endif + +----------------------------------------------------------------------------- +-- Standard IO + +-- | Write a character to the standard output device +-- +-- 'putChar' is implemented as @'hPutChar' 'stdout'@. +-- +-- This operation may fail with the same errors as 'hPutChar'. +-- +-- ==== __Examples__ +-- +-- Note that the following do not put a newline. +-- +-- >>> putChar 'x' +-- x +-- +-- >>> putChar '\0042' +-- * +putChar :: Char -> IO () +putChar c = hPutChar stdout c + +-- | Write a string to the standard output device +-- +-- 'putStr' is implemented as @'hPutStr' 'stdout'@. +-- +-- This operation may fail with the same errors, and has the same issues with concurrency, as 'hPutStr'! +-- +-- ==== __Examples__ +-- +-- Note that the following do not put a newline. +-- +-- >>> putStr "Hello, World!" +-- Hello, World! +-- +-- >>> putStr "\0052\0042\0050" +-- 4*2 +-- +putStr :: String -> IO () +putStr s = hPutStr stdout s + +-- | Read a single character from the standard input device. +-- +-- 'getChar' is implemented as @'hGetChar' 'stdin'@. +-- +-- This operation may fail with the same errors as 'hGetChar'. +-- +-- ==== __Examples__ +-- +-- >>> getChar +-- a'a' +-- +-- >>> getChar +-- > +-- '\n' +getChar :: IO Char +getChar = hGetChar stdin + +-- | Read a line from the standard input device. +-- +-- 'getLine' is implemented as @'hGetLine' 'stdin'@. +-- +-- This operation may fail with the same errors as 'hGetLine'. +-- +-- ==== __Examples__ +-- +-- >>> getLine +-- > Hello World! +-- "Hello World!" +-- +-- >>> getLine +-- > +-- "" +getLine :: IO String +getLine = hGetLine stdin + +-- | The 'getContents' operation returns all user input as a single string, +-- which is read lazily as it is needed. +-- +-- 'getContents' is implemented as @'hGetContents' 'stdin'@. +-- +-- This operation may fail with the same errors as 'hGetContents'. +-- +-- ==== __Examples__ +-- +-- >>> getContents >>= putStr +-- > aaabbbccc :D +-- aaabbbccc :D +-- > I hope you have a great day +-- I hope you have a great day +-- > ^D +-- +-- >>> getContents >>= print . length +-- > abc +-- > <3 +-- > def ^D +-- 11 +getContents :: IO String +getContents = hGetContents stdin + +-- | The 'getContents'' operation returns all user input as a single string, +-- which is fully read before being returned +-- +-- 'getContents'' is implemented as @'hGetContents'' 'stdin'@. +-- +-- This operation may fail with the same errors as 'hGetContents''. +-- +-- ==== __Examples__ +-- +-- >>> getContents' >>= putStr +-- > aaabbbccc :D +-- > I hope you have a great day +-- aaabbbccc :D +-- I hope you have a great day +-- +-- >>> getContents' >>= print . length +-- > abc +-- > <3 +-- > def ^D +-- 11 +-- +-- @since base-4.15.0.0 +getContents' :: IO String +getContents' = hGetContents' stdin + +-- | @'interact' f@ takes the entire input from 'stdin' and applies @f@ to it. +-- The resulting string is written to the 'stdout' device. +-- +-- Note that this operation is lazy, which allows to produce output +-- even before all input has been consumed. +-- +-- This operation may fail with the same errors as 'getContents' and 'putStr'. +-- +-- If it doesn't produce output the buffering settings may not be +-- correct, use ^D (ctrl+D) to close stdin which forces +-- the buffer to be consumed. +-- +-- You may wish to set the buffering style appropriate to your program's +-- needs before using this function, for example: +-- +-- @ +-- main :: IO () +-- main = do +-- hSetBuffering stdin LineBuffering +-- hSetBuffering stdout NoBuffering +-- interact (concatMap (\str -> str ++ str) . L.lines) +-- @ +-- +-- ==== __Examples__ +-- +-- >>> interact (\str -> str ++ str) +-- > hi :) +-- hi :) +-- > ^D +-- hi :) +-- +-- >>> interact (const ":D") +-- :D +-- +-- >>> interact (show . words) +-- > hello world! +-- > I hope you have a great day +-- > ^D +-- ["hello","world!","I","hope","you","have","a","great","day"] +interact :: (String -> String) -> IO () +interact f = do s <- getContents + putStr (f s) + +-- | The 'readFile' function reads a file and +-- returns the contents of the file as a string. +-- +-- The file is read lazily, on demand, as with 'getContents'. +-- +-- This operation may fail with the same errors as 'hGetContents' and 'openFile'. +-- +-- ==== __Examples__ +-- +-- >>> readFile "~/hello_world" +-- "Greetings!" +-- +-- >>> take 5 <$> readFile "/dev/zero" +-- "\NUL\NUL\NUL\NUL\NUL" +readFile :: FilePath -> IO String +readFile name = openFile name ReadMode >>= hGetContents + +-- | The 'readFile'' function reads a file and +-- returns the contents of the file as a string. +-- +-- This is identical to 'readFile', but the file is fully read before being returned, +-- as with 'getContents''. +-- +-- @since base-4.15.0.0 +readFile' :: FilePath -> IO String +-- There's a bit of overkill here—both withFile and +-- hGetContents' will close the file in the end. +readFile' name = withFile name ReadMode hGetContents' + +-- | The computation @'writeFile' file str@ function writes the string @str@, +-- to the file @file@. +-- +-- This operation may fail with the same errors as 'hPutStr' and 'withFile'. +-- +-- ==== __Examples__ +-- +-- >>> writeFile "hello" "world" >> readFile "hello" +-- "world" +-- +-- >>> writeFile "~/" "D:" +-- *** Exception: ~/: withFile: inappropriate type (Is a directory) +writeFile :: FilePath -> String -> IO () +writeFile f txt = withFile f WriteMode (\ hdl -> hPutStr hdl txt) + +-- | The computation @'appendFile' file str@ function appends the string @str@, +-- to the file @file@. +-- +-- Note that 'writeFile' and 'appendFile' write a literal string +-- to a file. To write a value of any printable type, as with 'print', +-- use the 'show' function to convert the value to a string first. +-- +-- This operation may fail with the same errors as 'hPutStr' and 'withFile'. +-- +-- ==== __Examples__ +-- +-- The following example could be more efficently written by acquiring a handle +-- instead with 'openFile' and using the computations capable of writing to handles +-- such as 'hPutStr'. +-- +-- >>> let fn = "hello_world" +-- >>> in writeFile fn "hello" >> appendFile fn " world!" >> (readFile fn >>= putStrLn) +-- "hello world!" +-- +-- >>> let fn = "foo"; output = readFile' fn >>= putStrLn +-- >>> in output >> appendFile fn (show [1,2,3]) >> output +-- this is what's in the file +-- this is what's in the file[1,2,3] +appendFile :: FilePath -> String -> IO () +appendFile f txt = withFile f AppendMode (\ hdl -> hPutStr hdl txt) + +-- | The 'readLn' function combines 'getLine' and 'readIO'. +-- +-- This operation may fail with the same errors as 'getLine' and 'readIO'. +-- +-- ==== __Examples__ +-- +-- >>> fmap (+ 5) readLn +-- > 25 +-- 30 +-- +-- >>> readLn :: IO String +-- > this is not a string literal +-- *** Exception: user error (Prelude.readIO: no parse) +readLn :: Read a => IO a +readLn = getLine >>= readIO + +-- | The 'readIO' function is similar to 'read' except that it signals +-- parse failure to the 'IO' monad instead of terminating the program. +-- +-- This operation may fail with: +-- +-- * 'GHC.Internal.System.IO.Error.isUserError' if there is no unambiguous parse. +-- +-- ==== __Examples__ +-- +-- >>> fmap (+ 1) (readIO "1") +-- 2 +-- +-- >>> readIO "not quite ()" :: IO () +-- *** Exception: user error (Prelude.readIO: no parse) +readIO :: Read a => String -> IO a +readIO s = case (do { (x,t) <- reads s ; + ("","") <- lex t ; + return x }) of + [x] -> return x + [] -> ioError (userError "Prelude.readIO: no parse") + _ -> ioError (userError "Prelude.readIO: ambiguous parse") + +-- | The encoding of the current locale. +-- +-- This is the initial locale encoding: if it has been subsequently changed by +-- 'GHC.Internal.IO.Encoding.setLocaleEncoding' this value will not reflect that change. +localeEncoding :: TextEncoding +localeEncoding = initLocaleEncoding + +-- | Computation 'hReady' @hdl@ indicates whether at least one item is +-- available for input from handle @hdl@. +-- +-- This operation may fail with: +-- +-- * 'GHC.Internal.System.IO.Error.isEOFError' if the end of file has been reached. +hReady :: Handle -> IO Bool +hReady h = hWaitForInput h 0 + +-- | Computation 'hPrint' @hdl t@ writes the string representation of @t@ +-- given by the 'show' function to the file or channel managed by @hdl@ +-- and appends a newline. +-- +-- This operation may fail with the same errors as 'hPutStrLn' +-- +-- ==== __Examples__ +-- +-- >>> hPrint stdout [1,2,3] +-- [1,2,3] +-- +-- >>> hPrint stdin [4,5,6] +-- *** Exception: <stdin>: hPutStr: illegal operation (handle is not open for writing) +hPrint :: Show a => Handle -> a -> IO () +hPrint hdl = hPutStrLn hdl . show + +-- | The function creates a temporary file in ReadWrite mode. +-- The created file isn\'t deleted automatically, so you need to delete it manually. +-- +-- The file is created with permissions such that only the current +-- user can read\/write it. +-- +-- With some exceptions (see below), the file will be created securely +-- in the sense that an attacker should not be able to cause +-- openTempFile to overwrite another file on the filesystem using your +-- credentials, by putting symbolic links (on Unix) in the place where +-- the temporary file is to be created. On Unix the @O_CREAT@ and +-- @O_EXCL@ flags are used to prevent this attack, but note that +-- @O_EXCL@ is sometimes not supported on NFS filesystems, so if you +-- rely on this behaviour it is best to use local filesystems only. +openTempFile :: FilePath -- ^ Directory in which to create the file + -> String -- ^ File name template. If the template is \"foo.ext\" then + -- the created file will be \"fooXXX.ext\" where XXX is some + -- random number. Note that this should not contain any path + -- separator characters. On Windows, the template prefix may + -- be truncated to 3 chars, e.g. \"foobar.ext\" will be + -- \"fooXXX.ext\". + -> IO (FilePath, Handle) +openTempFile tmp_dir template + = openTempFile' "openTempFile" tmp_dir template False 0o600 + +-- | Like 'openTempFile', but opens the file in binary mode. See 'openBinaryFile' for more comments. +openBinaryTempFile :: FilePath -> String -> IO (FilePath, Handle) +openBinaryTempFile tmp_dir template + = openTempFile' "openBinaryTempFile" tmp_dir template True 0o600 + +-- | Like 'openTempFile', but uses the default file permissions +openTempFileWithDefaultPermissions :: FilePath -> String + -> IO (FilePath, Handle) +openTempFileWithDefaultPermissions tmp_dir template + = openTempFile' "openTempFileWithDefaultPermissions" tmp_dir template False 0o666 + +-- | Like 'openBinaryTempFile', but uses the default file permissions +openBinaryTempFileWithDefaultPermissions :: FilePath -> String + -> IO (FilePath, Handle) +openBinaryTempFileWithDefaultPermissions tmp_dir template + = openTempFile' "openBinaryTempFileWithDefaultPermissions" tmp_dir template True 0o666 + +openTempFile' :: String -> FilePath -> String -> Bool -> CMode + -> IO (FilePath, Handle) +openTempFile' loc tmp_dir template binary mode + | pathSeparator template + = failIO $ "openTempFile': Template string must not contain path separator characters: "++template + | otherwise = findTempName + where + -- We split off the last extension, so we can use .foo.ext files + -- for temporary files (hidden on Unix OSes). Unfortunately we're + -- below filepath in the hierarchy here. + (prefix, suffix) = + case break (== '.') $ reverse template of + -- First case: template contains no '.'s. Just re-reverse it. + (rev_suffix, "") -> (reverse rev_suffix, "") + -- Second case: template contains at least one '.'. Strip the + -- dot from the prefix and prepend it to the suffix (if we don't + -- do this, the unique number will get added after the '.' and + -- thus be part of the extension, which is wrong.) + (rev_suffix, '.':rest) -> (reverse rest, '.':reverse rev_suffix) + -- Otherwise, something is wrong, because (break (== '.')) should + -- always return a pair with either the empty string or a string + -- beginning with '.' as the second component. + _ -> errorWithoutStackTrace "bug in GHC.Internal.System.IO.openTempFile" +#if defined(mingw32_HOST_OS) + findTempName = findTempNamePosix <!> findTempNameWinIO + + findTempNameWinIO = do + let label = if null prefix then "ghc" else prefix + withCWString tmp_dir $ \c_tmp_dir -> + withCWString label $ \c_template -> + withCWString suffix $ \c_suffix -> + with nullPtr $ \c_ptr -> do + res <- c_createUUIDTempFileErrNo c_tmp_dir c_template c_suffix c_ptr + if not res + then do errno <- getErrno + ioError (errnoToIOError loc errno Nothing (Just tmp_dir)) + else do c_p <- peek c_ptr + filename <- peekCWString c_p + free c_p + let flags = fromIntegral mode .&. o_EXCL + handleResultsWinIO filename (flags == o_EXCL) + + findTempNamePosix = do + let label = if null prefix then "ghc" else prefix + withCWString tmp_dir $ \c_tmp_dir -> + withCWString label $ \c_template -> + withCWString suffix $ \c_suffix -> + allocaBytes (sizeOf (undefined :: CWchar) * 260) $ \c_str -> do + res <- c_getTempFileNameErrorNo c_tmp_dir c_template c_suffix 0 + c_str + if not res + then do errno <- getErrno + ioError (errnoToIOError loc errno Nothing (Just tmp_dir)) + else do filename <- peekCWString c_str + handleResultsPosix filename + + handleResultsPosix filename = do + let oflags1 = rw_flags .|. o_EXCL + binary_flags + | binary = o_BINARY + | otherwise = 0 + oflags = oflags1 .|. binary_flags + fd <- withFilePath filename $ \ f -> c_open f oflags mode + case fd < 0 of + True -> do errno <- getErrno + ioError (errnoToIOError loc errno Nothing (Just tmp_dir)) + False -> + do (fD,fd_type) <- FD.mkFD fd ReadWriteMode Nothing{-no stat-} + False{-is_socket-} + True{-is_nonblock-} + + enc <- getLocaleEncoding + h <- POSIX.mkHandleFromFD fD fd_type filename ReadWriteMode + False{-set non-block-} (Just enc) + + return (filename, h) + + handleResultsWinIO filename excl = do + (hwnd, hwnd_type) <- openFileAsTemp filename True excl + mb_codec <- if binary then return Nothing else fmap Just getLocaleEncoding + + -- then use it to make a Handle + h <- mkHandleFromHANDLE hwnd hwnd_type filename ReadWriteMode mb_codec + `onException` IODevice.close hwnd + return (filename, h) + +foreign import ccall "getTempFileNameErrorNo" c_getTempFileNameErrorNo + :: CWString -> CWString -> CWString -> CUInt -> Ptr CWchar -> IO Bool + +foreign import ccall "__createUUIDTempFileErrNo" c_createUUIDTempFileErrNo + :: CWString -> CWString -> CWString -> Ptr CWString -> IO Bool + +pathSeparator :: String -> Bool +pathSeparator template = any (\x-> x == '/' || x == '\\') template + +output_flags = std_flags +#else /* else mingw32_HOST_OS */ + findTempName = do + rs <- rand_string + let filename = prefix ++ rs ++ suffix + filepath = tmp_dir `combine` filename + r <- openNewFile filepath binary mode + case r of + FileExists -> findTempName + OpenNewError errno -> ioError (errnoToIOError loc errno Nothing (Just tmp_dir)) + NewFileCreated fd -> do + (fD,fd_type) <- FD.mkFD fd ReadWriteMode Nothing{-no stat-} + False{-is_socket-} + True{-is_nonblock-} + + enc <- getLocaleEncoding + h <- POSIX.mkHandleFromFD fD fd_type filepath ReadWriteMode False{-set non-block-} (Just enc) + + return (filepath, h) + + where + -- XXX bits copied from System.FilePath, since that's not available here + combine a b + | null b = a + | null a = b + | pathSeparator [last a] = a ++ b + | otherwise = a ++ [pathSeparatorChar] ++ b + +tempCounter :: IORef Int +tempCounter = unsafePerformIO $ newIORef 0 +{-# NOINLINE tempCounter #-} + +-- build large digit-alike number +rand_string :: IO String +rand_string = do + r1 <- c_getpid + (r2, _) <- atomicModifyIORef'_ tempCounter (+1) + return $ show r1 ++ "-" ++ show r2 + +data OpenNewFileResult + = NewFileCreated CInt + | FileExists + | OpenNewError Errno + +openNewFile :: FilePath -> Bool -> CMode -> IO OpenNewFileResult +openNewFile filepath binary mode = do + let oflags1 = rw_flags .|. o_EXCL + + binary_flags + | binary = o_BINARY + | otherwise = 0 + + oflags = oflags1 .|. binary_flags + fd <- withFilePath filepath $ \ f -> + c_open f oflags mode + if fd < 0 + then do + errno <- getErrno + case errno of + _ | errno == eEXIST -> return FileExists + _ -> return (OpenNewError errno) + else return (NewFileCreated fd) + +-- XXX Should use filepath library +pathSeparatorChar :: Char +pathSeparatorChar = '/' + +pathSeparator :: String -> Bool +pathSeparator template = pathSeparatorChar `elem` template + +output_flags = std_flags .|. o_CREAT +#endif /* mingw32_HOST_OS */ + +-- XXX Copied from GHC.Handle +std_flags, output_flags, rw_flags :: CInt +std_flags = o_NONBLOCK .|. o_NOCTTY +rw_flags = output_flags .|. o_RDWR -- $locking -- Implementations should enforce as far as possible, at least locally to the @@ -219,3 +879,24 @@ import GHC.Internal.Control.Monad.Fix (fixIO) -- output -- > input^D -- output + +{-NOTE: + The following instances are technically orphans, but practically they are + not, since ordinary users should not use @ghc-internal@ directly and thus + get the instantiated types only through this module. +-} + +-- | @since base-4.2.0.0 +deriving instance Read IOMode + +-- | @since base-4.2.0.0 +deriving instance Read BufferMode + +-- | @since base-4.2.0.0 +deriving instance Read SeekMode + +-- | @since base-4.3.0.0 +deriving instance Read Newline + +-- | @since base-4.3.0.0 +deriving instance Read NewlineMode ===================================== libraries/base/src/Text/Printf.hs ===================================== @@ -97,9 +97,9 @@ import Data.Char import GHC.Internal.Int import GHC.Internal.Data.List (stripPrefix) import GHC.Internal.Word -import GHC.Internal.Numeric import GHC.Internal.Numeric.Natural -import GHC.Internal.System.IO +import Numeric +import System.IO -- $setup -- >>> import Prelude ===================================== libraries/ghc-internal/src/GHC/Internal/ByteOrder.hs ===================================== @@ -28,7 +28,6 @@ module GHC.Internal.ByteOrder import GHC.Internal.Base import GHC.Internal.Enum import GHC.Internal.Generics (Generic) -import GHC.Internal.Text.Read import GHC.Internal.Text.Show -- | Byte ordering. @@ -39,7 +38,6 @@ data ByteOrder , Ord -- ^ @since base-4.11.0.0 , Bounded -- ^ @since base-4.11.0.0 , Enum -- ^ @since base-4.11.0.0 - , Read -- ^ @since base-4.11.0.0 , Show -- ^ @since base-4.11.0.0 , Generic -- ^ @since base-4.15.0.0 ) ===================================== libraries/ghc-internal/src/GHC/Internal/Data/Data.hs ===================================== @@ -61,6 +61,7 @@ module GHC.Internal.Data.Data ( mkIntType, mkFloatType, mkCharType, + mkPrimCon, mkNoRepType, -- ** Observers dataTypeName, @@ -94,7 +95,6 @@ module GHC.Internal.Data.Data ( constrIndex, -- ** From strings to constructors and vice versa: all data types showConstr, - readConstr, -- * Convenience functions: take type constructors apart tyconUQname, @@ -123,10 +123,8 @@ import GHC.Internal.Data.Version( Version(..) ) import GHC.Internal.Base hiding (Any, IntRep, FloatRep, NonEmpty(..)) import GHC.Internal.List import GHC.Internal.Num -import GHC.Internal.Read import GHC.Internal.Show import GHC.Internal.Tuple (Solo (..)) -import GHC.Internal.Text.Read( reads ) -- Imports for the instances import GHC.Internal.Data.Functor.Identity -- So we can give Data instance for Identity @@ -682,32 +680,6 @@ showConstr :: Constr -> String showConstr = constring --- | Lookup a constructor via a string -readConstr :: DataType -> String -> Maybe Constr -readConstr dt str = - case dataTypeRep dt of - AlgRep cons -> idx cons - IntRep -> mkReadCon (\i -> (mkPrimCon dt str (IntConstr i))) - FloatRep -> mkReadCon ffloat - CharRep -> mkReadCon (\c -> (mkPrimCon dt str (CharConstr c))) - NoRep -> Nothing - where - - -- Read a value and build a constructor - mkReadCon :: Read t => (t -> Constr) -> Maybe Constr - mkReadCon f = case (reads str) of - [(t,"")] -> Just (f t) - _ -> Nothing - - -- Traverse list of algebraic datatype constructors - idx :: [Constr] -> Maybe Constr - idx cons = case filter ((==) str . showConstr) cons of - [] -> Nothing - hd : _ -> Just hd - - ffloat :: Double -> Constr - ffloat = mkPrimCon dt str . FloatConstr . toRational - ------------------------------------------------------------------------------ -- -- Convenience functions: algebraic data types ===================================== libraries/ghc-internal/src/GHC/Internal/Data/Version.hs ===================================== @@ -10,7 +10,7 @@ -- -- Maintainer : libraries(a)haskell.org -- Stability : stable --- Portability : non-portable (local universal quantification in ReadP) +-- Portability : non-portable -- -- A general library for representation and manipulation of versions. -- @@ -31,23 +31,18 @@ module GHC.Internal.Data.Version ( -- * The @Version@ type Version(..), -- * A concrete representation of @Version@ - showVersion, parseVersion, + showVersion, -- * Constructor function makeVersion ) where -import GHC.Internal.Data.Functor ( Functor(..) ) import GHC.Internal.Data.Eq import GHC.Internal.Int ( Int ) import GHC.Internal.Data.List ( map, sort, concat, concatMap, intersperse, (++) ) import GHC.Internal.Data.Ord -import GHC.Internal.Base ( Applicative(..), (&&), String ) +import GHC.Internal.Base ( (&&), String ) import GHC.Internal.Generics -import GHC.Internal.Unicode ( isDigit, isAlphaNum ) -import GHC.Internal.Read import GHC.Internal.Show -import GHC.Internal.Text.ParserCombinators.ReadP -import GHC.Internal.Text.Read ( read ) {- | A 'Version' represents the version of a software entity. @@ -69,8 +64,8 @@ operations are the right thing for every 'Version'. Similarly, concrete representations of versions may differ. One possible concrete representation is provided (see 'showVersion' and -'parseVersion'), but depending on the application a different concrete -representation may be more appropriate. +'Data.Version.parseVersion'), but depending on the application a +different concrete representation may be more appropriate. -} data Version = Version { versionBranch :: [Int], @@ -92,8 +87,7 @@ data Version = -- The interpretation of the list of tags is entirely dependent -- on the entity that this version applies to. } - deriving ( Read -- ^ @since base-2.01 - , Show -- ^ @since base-2.01 + deriving ( Show -- ^ @since base-2.01 , Generic -- ^ @since base-4.9.0.0 ) {-# DEPRECATED versionTags "See GHC ticket #2496" #-} @@ -121,13 +115,6 @@ showVersion (Version branch tags) = concat (intersperse "." (map show branch)) ++ concatMap ('-':) tags --- | A parser for versions in the format produced by 'showVersion'. --- -parseVersion :: ReadP Version -parseVersion = do branch <- sepBy1 (fmap read (munch1 isDigit)) (char '.') - tags <- many (char '-' *> munch1 isAlphaNum) - pure Version{versionBranch=branch, versionTags=tags} - -- | Construct tag-less 'Version' -- -- @since base-4.8.0.0 ===================================== libraries/ghc-internal/src/GHC/Internal/IO/Device.hs ===================================== @@ -31,7 +31,6 @@ import GHC.Internal.Base import GHC.Internal.Word import GHC.Internal.Arr import GHC.Internal.Enum -import GHC.Internal.Read import GHC.Internal.Show import GHC.Internal.Ptr import GHC.Internal.Num @@ -179,7 +178,6 @@ data SeekMode , Ord -- ^ @since base-4.2.0.0 , Ix -- ^ @since base-4.2.0.0 , Enum -- ^ @since base-4.2.0.0 - , Read -- ^ @since base-4.2.0.0 , Show -- ^ @since base-4.2.0.0 ) ===================================== libraries/ghc-internal/src/GHC/Internal/IO/Handle/Types.hs ===================================== @@ -48,7 +48,6 @@ import GHC.Internal.IO.BufferedIO import GHC.Internal.IO.Encoding.Types import GHC.Internal.IORef import GHC.Internal.Show -import GHC.Internal.Read import GHC.Internal.Word import GHC.Internal.IO.Device import GHC.Internal.Data.Typeable @@ -270,7 +269,6 @@ data BufferMode -- is 'Just' @n@ and is otherwise implementation-dependent. deriving ( Eq -- ^ @since base-4.2.0.0 , Ord -- ^ @since base-4.2.0.0 - , Read -- ^ @since base-4.2.0.0 , Show -- ^ @since base-4.2.0.0 ) @@ -376,7 +374,6 @@ data Newline = LF -- ^ @\'\\n\'@ | CRLF -- ^ @\'\\r\\n\'@ deriving ( Eq -- ^ @since base-4.2.0.0 , Ord -- ^ @since base-4.3.0.0 - , Read -- ^ @since base-4.3.0.0 , Show -- ^ @since base-4.3.0.0 ) @@ -393,7 +390,6 @@ data NewlineMode } deriving ( Eq -- ^ @since base-4.2.0.0 , Ord -- ^ @since base-4.3.0.0 - , Read -- ^ @since base-4.3.0.0 , Show -- ^ @since base-4.3.0.0 ) ===================================== libraries/ghc-internal/src/GHC/Internal/IO/IOMode.hs ===================================== @@ -20,7 +20,6 @@ module GHC.Internal.IO.IOMode (IOMode(..)) where import GHC.Internal.Base import GHC.Internal.Show -import GHC.Internal.Read import GHC.Internal.Arr import GHC.Internal.Enum @@ -30,7 +29,6 @@ data IOMode = ReadMode | WriteMode | AppendMode | ReadWriteMode , Ord -- ^ @since base-4.2.0.0 , Ix -- ^ @since base-4.2.0.0 , Enum -- ^ @since base-4.2.0.0 - , Read -- ^ @since base-4.2.0.0 , Show -- ^ @since base-4.2.0.0 ) ===================================== libraries/ghc-internal/src/GHC/Internal/Numeric.hs ===================================== @@ -1,5 +1,4 @@ {-# LANGUAGE Trustworthy #-} -{-# LANGUAGE NoImplicitPrelude, MagicHash #-} ----------------------------------------------------------------------------- -- | @@ -16,274 +15,22 @@ -- ----------------------------------------------------------------------------- -module GHC.Internal.Numeric ( - - -- * Showing - - showSigned, - - showIntAtBase, - showInt, - showBin, - showHex, - showOct, - - showEFloat, - showFFloat, - showGFloat, - showFFloatAlt, - showGFloatAlt, - showFloat, - showHFloat, - - floatToDigits, - - -- * Reading - - -- | /NB:/ 'readInt' is the \'dual\' of 'showIntAtBase', - -- and 'readDec' is the \`dual\' of 'showInt'. - -- The inconsistent naming is a historical accident. - - readSigned, - - readInt, - readBin, - readDec, - readOct, - readHex, - - readFloat, - - lexDigits, - - -- * Miscellaneous - - fromRat, - Floating(..) - - ) where +module GHC.Internal.Numeric (showIntAtBase, showHex) where import GHC.Internal.Base -import GHC.Internal.Read -import GHC.Internal.Real -import GHC.Internal.Float -import GHC.Internal.Num -import GHC.Internal.Show -import GHC.Internal.Text.ParserCombinators.ReadP( ReadP, readP_to_S, pfail ) -import qualified GHC.Internal.Text.Read.Lex as L - --- $setup --- >>> import Prelude - --- ----------------------------------------------------------------------------- --- Reading - --- | Reads an /unsigned/ integral value in an arbitrary base. -readInt :: Num a - => a -- ^ the base - -> (Char -> Bool) -- ^ a predicate distinguishing valid digits in this base - -> (Char -> Int) -- ^ a function converting a valid digit character to an 'Int' - -> ReadS a -readInt base isDigit valDigit = readP_to_S (L.readIntP base isDigit valDigit) - --- | Read an unsigned number in binary notation. --- --- >>> readBin "10011" --- [(19,"")] -readBin :: (Eq a, Num a) => ReadS a -readBin = readP_to_S L.readBinP - --- | Read an unsigned number in octal notation. --- --- >>> readOct "0644" --- [(420,"")] -readOct :: (Eq a, Num a) => ReadS a -readOct = readP_to_S L.readOctP - --- | Read an unsigned number in decimal notation. --- --- >>> readDec "0644" --- [(644,"")] -readDec :: (Eq a, Num a) => ReadS a -readDec = readP_to_S L.readDecP - --- | Read an unsigned number in hexadecimal notation. --- Both upper or lower case letters are allowed. --- --- >>> readHex "deadbeef" --- [(3735928559,"")] -readHex :: (Eq a, Num a) => ReadS a -readHex = readP_to_S L.readHexP - --- | Reads an /unsigned/ 'RealFrac' value, --- expressed in decimal scientific notation. --- --- Note that this function takes time linear in the magnitude of its input --- which can scale exponentially with input size (e.g. @"1e100000000"@ is a --- very large number while having a very small textual form). --- For this reason, users should take care to avoid using this function on --- untrusted input. Users needing to parse floating point values --- (e.g. 'Float') are encouraged to instead use 'read', which does --- not suffer from this issue. -readFloat :: RealFrac a => ReadS a -readFloat = readP_to_S readFloatP - -readFloatP :: RealFrac a => ReadP a -readFloatP = - do tok <- L.lex - case tok of - L.Number n -> return $ fromRational $ L.numberToRational n - _ -> pfail - --- It's turgid to have readSigned work using list comprehensions, --- but it's specified as a ReadS to ReadS transformer --- With a bit of luck no one will use it. - --- | Reads a /signed/ 'Real' value, given a reader for an unsigned value. -readSigned :: (Real a) => ReadS a -> ReadS a -readSigned readPos = readParen False read' - where read' r = read'' r ++ - (do - ("-",s) <- lex r - (x,t) <- read'' s - return (-x,t)) - read'' r = do - (str,s) <- lex r - (n,"") <- readPos str - return (n,s) - --- ----------------------------------------------------------------------------- --- Showing - --- | Show /non-negative/ 'Integral' numbers in base 10. -showInt :: Integral a => a -> ShowS -showInt n0 cs0 - | n0 < 0 = errorWithoutStackTrace "GHC.Internal.Numeric.showInt: can't show negative numbers" - | otherwise = go n0 cs0 - where - go n cs - | n < 10 = case unsafeChr (ord '0' + fromIntegral n) of - c@(C# _) -> c:cs - | otherwise = case unsafeChr (ord '0' + fromIntegral r) of - c@(C# _) -> go q (c:cs) - where - (q,r) = n `quotRem` 10 - --- Controlling the format and precision of floats. The code that --- implements the formatting itself is in @PrelNum@ to avoid --- mutual module deps. - -{-# SPECIALIZE showEFloat :: - Maybe Int -> Float -> ShowS #-} -{-# SPECIALIZE showEFloat :: - Maybe Int -> Double -> ShowS #-} -{-# SPECIALIZE showFFloat :: - Maybe Int -> Float -> ShowS #-} -{-# SPECIALIZE showFFloat :: - Maybe Int -> Double -> ShowS #-} -{-# SPECIALIZE showGFloat :: - Maybe Int -> Float -> ShowS #-} -{-# SPECIALIZE showGFloat :: - Maybe Int -> Double -> ShowS #-} - --- | Show a signed 'RealFloat' value --- using scientific (exponential) notation (e.g. @2.45e2@, @1.5e-3@). --- --- In the call @'showEFloat' digs val@, if @digs@ is 'Nothing', --- the value is shown to full precision; if @digs@ is @'Just' d@, --- then at most @d@ digits after the decimal point are shown. -showEFloat :: (RealFloat a) => Maybe Int -> a -> ShowS - --- | Show a signed 'RealFloat' value --- using standard decimal notation (e.g. @245000@, @0.0015@). --- --- In the call @'showFFloat' digs val@, if @digs@ is 'Nothing', --- the value is shown to full precision; if @digs@ is @'Just' d@, --- then at most @d@ digits after the decimal point are shown. -showFFloat :: (RealFloat a) => Maybe Int -> a -> ShowS - --- | Show a signed 'RealFloat' value --- using standard decimal notation for arguments whose absolute value lies --- between @0.1@ and @9,999,999@, and scientific notation otherwise. --- --- In the call @'showGFloat' digs val@, if @digs@ is 'Nothing', --- the value is shown to full precision; if @digs@ is @'Just' d@, --- then at most @d@ digits after the decimal point are shown. -showGFloat :: (RealFloat a) => Maybe Int -> a -> ShowS - -showEFloat d x = showString (formatRealFloat FFExponent d x) -showFFloat d x = showString (formatRealFloat FFFixed d x) -showGFloat d x = showString (formatRealFloat FFGeneric d x) - --- | Show a signed 'RealFloat' value --- using standard decimal notation (e.g. @245000@, @0.0015@). --- --- This behaves as 'showFFloat', except that a decimal point --- is always guaranteed, even if not needed. --- --- @since base-4.7.0.0 -showFFloatAlt :: (RealFloat a) => Maybe Int -> a -> ShowS - --- | Show a signed 'RealFloat' value --- using standard decimal notation for arguments whose absolute value lies --- between @0.1@ and @9,999,999@, and scientific notation otherwise. --- --- This behaves as 'showFFloat', except that a decimal point --- is always guaranteed, even if not needed. --- --- @since base-4.7.0.0 -showGFloatAlt :: (RealFloat a) => Maybe Int -> a -> ShowS - -showFFloatAlt d x = showString (formatRealFloatAlt FFFixed d True x) -showGFloatAlt d x = showString (formatRealFloatAlt FFGeneric d True x) - -{- | Show a floating-point value in the hexadecimal format, -similar to the @%a@ specifier in C's printf. - - >>> showHFloat (212.21 :: Double) "" - "0x1.a86b851eb851fp7" - >>> showHFloat (-12.76 :: Float) "" - "-0x1.9851ecp3" - >>> showHFloat (-0 :: Double) "" - "-0x0p+0" - -@since base-4.11.0.0 --} -showHFloat :: RealFloat a => a -> ShowS -showHFloat = showString . fmt - where - fmt x - | isNaN x = "NaN" - | isInfinite x = (if x < 0 then "-" else "") ++ "Infinity" - | x < 0 || isNegativeZero x = '-' : cvt (-x) - | otherwise = cvt x - - cvt x - | x == 0 = "0x0p+0" - | otherwise = - case floatToDigits 2 x of - r@([], _) -> error $ "Impossible happened: showHFloat: " ++ show r - (d:ds, e) -> "0x" ++ show d ++ frac ds ++ "p" ++ show (e-1) - - -- Given binary digits, convert them to hex in blocks of 4 - -- Special case: If all 0's, just drop it. - frac digits - | allZ digits = "" - | otherwise = "." ++ hex digits - where - hex ds = - case ds of - [] -> "" - [a] -> hexDigit a 0 0 0 "" - [a,b] -> hexDigit a b 0 0 "" - [a,b,c] -> hexDigit a b c 0 "" - a : b : c : d : r -> hexDigit a b c d (hex r) - - hexDigit a b c d = showHex (8*a + 4*b + 2*c + d) - - allZ xs = case xs of - x : more -> x == 0 && allZ more - [] -> True + ( + seq, + ($), + otherwise, + Char, + Int, + (<), + (<=), + errorWithoutStackTrace + ) +import GHC.Internal.List ((++)) +import GHC.Internal.Real (Integral, toInteger, fromIntegral, quotRem) +import GHC.Internal.Show (ShowS, show, intToDigit) -- --------------------------------------------------------------------------- -- Integer printing functions @@ -307,11 +54,3 @@ showIntAtBase base toChr n0 r0 -- | Show /non-negative/ 'Integral' numbers in base 16. showHex :: Integral a => a -> ShowS showHex = showIntAtBase 16 intToDigit - --- | Show /non-negative/ 'Integral' numbers in base 8. -showOct :: Integral a => a -> ShowS -showOct = showIntAtBase 8 intToDigit - --- | Show /non-negative/ 'Integral' numbers in base 2. -showBin :: Integral a => a -> ShowS -showBin = showIntAtBase 2 intToDigit ===================================== libraries/ghc-internal/src/GHC/Internal/System/IO.hs ===================================== @@ -1,6 +1,4 @@ {-# LANGUAGE Trustworthy #-} -{-# LANGUAGE CPP, NoImplicitPrelude, CApiFFI #-} -{-# OPTIONS_GHC -Wno-x-partial #-} ----------------------------------------------------------------------------- -- | @@ -16,286 +14,13 @@ -- ----------------------------------------------------------------------------- -module GHC.Internal.System.IO ( - -- * The IO monad +module GHC.Internal.System.IO (putStrLn, print) where - IO, - - -- * Files and handles - - FilePath, - - Handle, -- abstract, instance of: Eq, Show. - - -- | GHC note: a 'Handle' will be automatically closed when the garbage - -- collector detects that it has become unreferenced by the program. - -- However, relying on this behaviour is not generally recommended: - -- the garbage collector is unpredictable. If possible, use - -- an explicit 'hClose' to close 'Handle's when they are no longer - -- required. GHC does not currently attempt to free up file - -- descriptors when they have run out, it is your responsibility to - -- ensure that this doesn't happen. - - -- ** Standard handles - - -- | Three handles are allocated during program initialisation, - -- and are initially open. - - stdin, stdout, stderr, - - -- * Opening and closing files - - -- ** Opening files - - withFile, - openFile, - IOMode(ReadMode,WriteMode,AppendMode,ReadWriteMode), - - -- ** Closing files - - hClose, - - -- ** Special cases - - -- | These functions are also exported by the "Prelude". - - readFile, - readFile', - writeFile, - appendFile, - - -- * Operations on handles - - -- ** Determining and changing the size of a file - - hFileSize, - hSetFileSize, - - -- ** Detecting the end of input - - hIsEOF, - isEOF, - - -- ** Buffering operations - - BufferMode(NoBuffering,LineBuffering,BlockBuffering), - hSetBuffering, - hGetBuffering, - hFlush, - - -- ** Repositioning handles - - hGetPosn, - hSetPosn, - HandlePosn, -- abstract, instance of: Eq, Show. - - hSeek, - SeekMode(AbsoluteSeek,RelativeSeek,SeekFromEnd), - hTell, - - -- ** Handle properties - - hIsOpen, hIsClosed, - hIsReadable, hIsWritable, - hIsSeekable, - - -- ** Terminal operations (not portable: GHC only) - - hIsTerminalDevice, - - hSetEcho, - hGetEcho, - - -- ** Showing handle state (not portable: GHC only) - - hShow, - - -- * Text input and output - - -- ** Text input - - hWaitForInput, - hReady, - hGetChar, - hGetLine, - hLookAhead, - hGetContents, - hGetContents', - - -- ** Text output - - hPutChar, - hPutStr, - hPutStrLn, - hPrint, - - -- ** Special cases for standard input and output - - -- | These functions are also exported by the "Prelude". - - interact, - putChar, - putStr, - putStrLn, - print, - getChar, - getLine, - getContents, - getContents', - readIO, - readLn, - - -- * Binary input and output - - withBinaryFile, - openBinaryFile, - hSetBinaryMode, - hPutBuf, - hGetBuf, - hGetBufSome, - hPutBufNonBlocking, - hGetBufNonBlocking, - - -- * Temporary files - - openTempFile, - openBinaryTempFile, - openTempFileWithDefaultPermissions, - openBinaryTempFileWithDefaultPermissions, - - -- * Unicode encoding\/decoding - - -- | A text-mode 'Handle' has an associated 'TextEncoding', which - -- is used to decode bytes into Unicode characters when reading, - -- and encode Unicode characters into bytes when writing. - -- - -- The default 'TextEncoding' is the same as the default encoding - -- on your system, which is also available as 'localeEncoding'. - -- (GHC note: on Windows, we currently do not support double-byte - -- encodings; if the console\'s code page is unsupported, then - -- 'localeEncoding' will be 'latin1'.) - -- - -- Encoding and decoding errors are always detected and reported, - -- except during lazy I/O ('hGetContents', 'getContents', and - -- 'readFile'), where a decoding error merely results in - -- termination of the character stream, as with other I/O errors. - - hSetEncoding, - hGetEncoding, - - -- ** Unicode encodings - TextEncoding, - latin1, - utf8, utf8_bom, - utf16, utf16le, utf16be, - utf32, utf32le, utf32be, - localeEncoding, - char8, - mkTextEncoding, - - -- * Newline conversion - - -- | In Haskell, a newline is always represented by the character - -- @\'\\n\'@. However, in files and external character streams, a - -- newline may be represented by another character sequence, such - -- as @\'\\r\\n\'@. - -- - -- A text-mode 'Handle' has an associated 'NewlineMode' that - -- specifies how to translate newline characters. The - -- 'NewlineMode' specifies the input and output translation - -- separately, so that for instance you can translate @\'\\r\\n\'@ - -- to @\'\\n\'@ on input, but leave newlines as @\'\\n\'@ on output. - -- - -- The default 'NewlineMode' for a 'Handle' is - -- 'nativeNewlineMode', which does no translation on Unix systems, - -- but translates @\'\\r\\n\'@ to @\'\\n\'@ and back on Windows. - -- - -- Binary-mode 'Handle's do no newline translation at all. - -- - hSetNewlineMode, - hGetNewlineMode, - Newline(..), nativeNewline, - NewlineMode(..), - noNewlineTranslation, universalNewlineMode, nativeNewlineMode, - ) where - -import GHC.Internal.Control.Exception.Base - -import GHC.Internal.Data.Bits -import GHC.Internal.Data.Maybe -import GHC.Internal.Foreign.C.Error -#if defined(mingw32_HOST_OS) -import GHC.Internal.Foreign.C.String -import GHC.Internal.Foreign.Ptr -import GHC.Internal.Foreign.Marshal.Alloc -import GHC.Internal.Foreign.Marshal.Utils (with) -import GHC.Internal.Foreign.Storable -import GHC.Internal.IO.SubSystem -import GHC.Internal.IO.Windows.Handle (openFileAsTemp) -import GHC.Internal.IO.Handle.Windows (mkHandleFromHANDLE) -import GHC.Internal.IO.Device as IODevice -import GHC.Internal.Real (fromIntegral) -#endif -import GHC.Internal.Foreign.C.Types -import GHC.Internal.System.Posix.Internals -import GHC.Internal.System.Posix.Types - -import GHC.Internal.Base -import GHC.Internal.List -#if !defined(mingw32_HOST_OS) -import GHC.Internal.IORef -#endif -import GHC.Internal.Num -import GHC.Internal.IO hiding ( bracket, onException ) -import GHC.Internal.IO.IOMode -import qualified GHC.Internal.IO.FD as FD -import GHC.Internal.IO.Handle -import qualified GHC.Internal.IO.Handle.FD as POSIX -import GHC.Internal.IO.Handle.Text ( hGetBufSome, hPutStrLn ) -import GHC.Internal.IO.Exception ( userError ) -import GHC.Internal.IO.Encoding -import GHC.Internal.Text.Read -import GHC.Internal.IO.StdHandles -import GHC.Internal.Show ------------------------------------------------------------------------------ --- Standard IO - --- | Write a character to the standard output device --- --- 'putChar' is implemented as @'hPutChar' 'stdout'@. --- --- This operation may fail with the same errors as 'hPutChar'. --- --- ==== __Examples__ --- --- Note that the following do not put a newline. --- --- >>> putChar 'x' --- x --- --- >>> putChar '\0042' --- * -putChar :: Char -> IO () -putChar c = hPutChar stdout c - --- | Write a string to the standard output device --- --- 'putStr' is implemented as @'hPutStr' 'stdout'@. --- --- This operation may fail with the same errors, and has the same issues with concurrency, as 'hPutStr'! --- --- ==== __Examples__ --- --- Note that the following do not put a newline. --- --- >>> putStr "Hello, World!" --- Hello, World! --- --- >>> putStr "\0052\0042\0050" --- 4*2 --- -putStr :: String -> IO () -putStr s = hPutStr stdout s +import GHC.Internal.Base (String) +import GHC.Internal.IO (IO) +import GHC.Internal.IO.Handle.Text (hPutStrLn) +import GHC.Internal.IO.StdHandles (stdout) +import GHC.Internal.Show (Show, show) -- | The same as 'putStr', but adds a newline character. -- @@ -332,485 +57,3 @@ putStrLn s = hPutStrLn stdout s -- [(0,1),(1,2),(2,4),(3,8),(4,16),(5,32),(6,64),(7,128),(8,256)] print :: Show a => a -> IO () print x = putStrLn (show x) - --- | Read a single character from the standard input device. --- --- 'getChar' is implemented as @'hGetChar' 'stdin'@. --- --- This operation may fail with the same errors as 'hGetChar'. --- --- ==== __Examples__ --- --- >>> getChar --- a'a' --- --- >>> getChar --- > --- '\n' -getChar :: IO Char -getChar = hGetChar stdin - --- | Read a line from the standard input device. --- --- 'getLine' is implemented as @'hGetLine' 'stdin'@. --- --- This operation may fail with the same errors as 'hGetLine'. --- --- ==== __Examples__ --- --- >>> getLine --- > Hello World! --- "Hello World!" --- --- >>> getLine --- > --- "" -getLine :: IO String -getLine = hGetLine stdin - --- | The 'getContents' operation returns all user input as a single string, --- which is read lazily as it is needed. --- --- 'getContents' is implemented as @'hGetContents' 'stdin'@. --- --- This operation may fail with the same errors as 'hGetContents'. --- --- ==== __Examples__ --- --- >>> getContents >>= putStr --- > aaabbbccc :D --- aaabbbccc :D --- > I hope you have a great day --- I hope you have a great day --- > ^D --- --- >>> getContents >>= print . length --- > abc --- > <3 --- > def ^D --- 11 -getContents :: IO String -getContents = hGetContents stdin - --- | The 'getContents'' operation returns all user input as a single string, --- which is fully read before being returned --- --- 'getContents'' is implemented as @'hGetContents'' 'stdin'@. --- --- This operation may fail with the same errors as 'hGetContents''. --- --- ==== __Examples__ --- --- >>> getContents' >>= putStr --- > aaabbbccc :D --- > I hope you have a great day --- aaabbbccc :D --- I hope you have a great day --- --- >>> getContents' >>= print . length --- > abc --- > <3 --- > def ^D --- 11 --- --- @since base-4.15.0.0 -getContents' :: IO String -getContents' = hGetContents' stdin - --- | @'interact' f@ takes the entire input from 'stdin' and applies @f@ to it. --- The resulting string is written to the 'stdout' device. --- --- Note that this operation is lazy, which allows to produce output --- even before all input has been consumed. --- --- This operation may fail with the same errors as 'getContents' and 'putStr'. --- --- If it doesn't produce output the buffering settings may not be --- correct, use ^D (ctrl+D) to close stdin which forces --- the buffer to be consumed. --- --- You may wish to set the buffering style appropriate to your program's --- needs before using this function, for example: --- --- @ --- main :: IO () --- main = do --- hSetBuffering stdin LineBuffering --- hSetBuffering stdout NoBuffering --- interact (concatMap (\str -> str ++ str) . L.lines) --- @ --- --- ==== __Examples__ --- --- >>> interact (\str -> str ++ str) --- > hi :) --- hi :) --- > ^D --- hi :) --- --- >>> interact (const ":D") --- :D --- --- >>> interact (show . words) --- > hello world! --- > I hope you have a great day --- > ^D --- ["hello","world!","I","hope","you","have","a","great","day"] -interact :: (String -> String) -> IO () -interact f = do s <- getContents - putStr (f s) - --- | The 'readFile' function reads a file and --- returns the contents of the file as a string. --- --- The file is read lazily, on demand, as with 'getContents'. --- --- This operation may fail with the same errors as 'hGetContents' and 'openFile'. --- --- ==== __Examples__ --- --- >>> readFile "~/hello_world" --- "Greetings!" --- --- >>> take 5 <$> readFile "/dev/zero" --- "\NUL\NUL\NUL\NUL\NUL" -readFile :: FilePath -> IO String -readFile name = openFile name ReadMode >>= hGetContents - --- | The 'readFile'' function reads a file and --- returns the contents of the file as a string. --- --- This is identical to 'readFile', but the file is fully read before being returned, --- as with 'getContents''. --- --- @since base-4.15.0.0 -readFile' :: FilePath -> IO String --- There's a bit of overkill here—both withFile and --- hGetContents' will close the file in the end. -readFile' name = withFile name ReadMode hGetContents' - --- | The computation @'writeFile' file str@ function writes the string @str@, --- to the file @file@. --- --- This operation may fail with the same errors as 'hPutStr' and 'withFile'. --- --- ==== __Examples__ --- --- >>> writeFile "hello" "world" >> readFile "hello" --- "world" --- --- >>> writeFile "~/" "D:" --- *** Exception: ~/: withFile: inappropriate type (Is a directory) -writeFile :: FilePath -> String -> IO () -writeFile f txt = withFile f WriteMode (\ hdl -> hPutStr hdl txt) - --- | The computation @'appendFile' file str@ function appends the string @str@, --- to the file @file@. --- --- Note that 'writeFile' and 'appendFile' write a literal string --- to a file. To write a value of any printable type, as with 'print', --- use the 'show' function to convert the value to a string first. --- --- This operation may fail with the same errors as 'hPutStr' and 'withFile'. --- --- ==== __Examples__ --- --- The following example could be more efficently written by acquiring a handle --- instead with 'openFile' and using the computations capable of writing to handles --- such as 'hPutStr'. --- --- >>> let fn = "hello_world" --- >>> in writeFile fn "hello" >> appendFile fn " world!" >> (readFile fn >>= putStrLn) --- "hello world!" --- --- >>> let fn = "foo"; output = readFile' fn >>= putStrLn --- >>> in output >> appendFile fn (show [1,2,3]) >> output --- this is what's in the file --- this is what's in the file[1,2,3] -appendFile :: FilePath -> String -> IO () -appendFile f txt = withFile f AppendMode (\ hdl -> hPutStr hdl txt) - --- | The 'readLn' function combines 'getLine' and 'readIO'. --- --- This operation may fail with the same errors as 'getLine' and 'readIO'. --- --- ==== __Examples__ --- --- >>> fmap (+ 5) readLn --- > 25 --- 30 --- --- >>> readLn :: IO String --- > this is not a string literal --- *** Exception: user error (Prelude.readIO: no parse) -readLn :: Read a => IO a -readLn = getLine >>= readIO - --- | The 'readIO' function is similar to 'read' except that it signals --- parse failure to the 'IO' monad instead of terminating the program. --- --- This operation may fail with: --- --- * 'GHC.Internal.System.IO.Error.isUserError' if there is no unambiguous parse. --- --- ==== __Examples__ --- --- >>> fmap (+ 1) (readIO "1") --- 2 --- --- >>> readIO "not quite ()" :: IO () --- *** Exception: user error (Prelude.readIO: no parse) -readIO :: Read a => String -> IO a -readIO s = case (do { (x,t) <- reads s ; - ("","") <- lex t ; - return x }) of - [x] -> return x - [] -> ioError (userError "Prelude.readIO: no parse") - _ -> ioError (userError "Prelude.readIO: ambiguous parse") - --- | The encoding of the current locale. --- --- This is the initial locale encoding: if it has been subsequently changed by --- 'GHC.Internal.IO.Encoding.setLocaleEncoding' this value will not reflect that change. -localeEncoding :: TextEncoding -localeEncoding = initLocaleEncoding - --- | Computation 'hReady' @hdl@ indicates whether at least one item is --- available for input from handle @hdl@. --- --- This operation may fail with: --- --- * 'GHC.Internal.System.IO.Error.isEOFError' if the end of file has been reached. -hReady :: Handle -> IO Bool -hReady h = hWaitForInput h 0 - --- | Computation 'hPrint' @hdl t@ writes the string representation of @t@ --- given by the 'show' function to the file or channel managed by @hdl@ --- and appends a newline. --- --- This operation may fail with the same errors as 'hPutStrLn' --- --- ==== __Examples__ --- --- >>> hPrint stdout [1,2,3] --- [1,2,3] --- --- >>> hPrint stdin [4,5,6] --- *** Exception: <stdin>: hPutStr: illegal operation (handle is not open for writing) -hPrint :: Show a => Handle -> a -> IO () -hPrint hdl = hPutStrLn hdl . show - --- | The function creates a temporary file in ReadWrite mode. --- The created file isn\'t deleted automatically, so you need to delete it manually. --- --- The file is created with permissions such that only the current --- user can read\/write it. --- --- With some exceptions (see below), the file will be created securely --- in the sense that an attacker should not be able to cause --- openTempFile to overwrite another file on the filesystem using your --- credentials, by putting symbolic links (on Unix) in the place where --- the temporary file is to be created. On Unix the @O_CREAT@ and --- @O_EXCL@ flags are used to prevent this attack, but note that --- @O_EXCL@ is sometimes not supported on NFS filesystems, so if you --- rely on this behaviour it is best to use local filesystems only. -openTempFile :: FilePath -- ^ Directory in which to create the file - -> String -- ^ File name template. If the template is \"foo.ext\" then - -- the created file will be \"fooXXX.ext\" where XXX is some - -- random number. Note that this should not contain any path - -- separator characters. On Windows, the template prefix may - -- be truncated to 3 chars, e.g. \"foobar.ext\" will be - -- \"fooXXX.ext\". - -> IO (FilePath, Handle) -openTempFile tmp_dir template - = openTempFile' "openTempFile" tmp_dir template False 0o600 - --- | Like 'openTempFile', but opens the file in binary mode. See 'openBinaryFile' for more comments. -openBinaryTempFile :: FilePath -> String -> IO (FilePath, Handle) -openBinaryTempFile tmp_dir template - = openTempFile' "openBinaryTempFile" tmp_dir template True 0o600 - --- | Like 'openTempFile', but uses the default file permissions -openTempFileWithDefaultPermissions :: FilePath -> String - -> IO (FilePath, Handle) -openTempFileWithDefaultPermissions tmp_dir template - = openTempFile' "openTempFileWithDefaultPermissions" tmp_dir template False 0o666 - --- | Like 'openBinaryTempFile', but uses the default file permissions -openBinaryTempFileWithDefaultPermissions :: FilePath -> String - -> IO (FilePath, Handle) -openBinaryTempFileWithDefaultPermissions tmp_dir template - = openTempFile' "openBinaryTempFileWithDefaultPermissions" tmp_dir template True 0o666 - -openTempFile' :: String -> FilePath -> String -> Bool -> CMode - -> IO (FilePath, Handle) -openTempFile' loc tmp_dir template binary mode - | pathSeparator template - = failIO $ "openTempFile': Template string must not contain path separator characters: "++template - | otherwise = findTempName - where - -- We split off the last extension, so we can use .foo.ext files - -- for temporary files (hidden on Unix OSes). Unfortunately we're - -- below filepath in the hierarchy here. - (prefix, suffix) = - case break (== '.') $ reverse template of - -- First case: template contains no '.'s. Just re-reverse it. - (rev_suffix, "") -> (reverse rev_suffix, "") - -- Second case: template contains at least one '.'. Strip the - -- dot from the prefix and prepend it to the suffix (if we don't - -- do this, the unique number will get added after the '.' and - -- thus be part of the extension, which is wrong.) - (rev_suffix, '.':rest) -> (reverse rest, '.':reverse rev_suffix) - -- Otherwise, something is wrong, because (break (== '.')) should - -- always return a pair with either the empty string or a string - -- beginning with '.' as the second component. - _ -> errorWithoutStackTrace "bug in GHC.Internal.System.IO.openTempFile" -#if defined(mingw32_HOST_OS) - findTempName = findTempNamePosix <!> findTempNameWinIO - - findTempNameWinIO = do - let label = if null prefix then "ghc" else prefix - withCWString tmp_dir $ \c_tmp_dir -> - withCWString label $ \c_template -> - withCWString suffix $ \c_suffix -> - with nullPtr $ \c_ptr -> do - res <- c_createUUIDTempFileErrNo c_tmp_dir c_template c_suffix c_ptr - if not res - then do errno <- getErrno - ioError (errnoToIOError loc errno Nothing (Just tmp_dir)) - else do c_p <- peek c_ptr - filename <- peekCWString c_p - free c_p - let flags = fromIntegral mode .&. o_EXCL - handleResultsWinIO filename (flags == o_EXCL) - - findTempNamePosix = do - let label = if null prefix then "ghc" else prefix - withCWString tmp_dir $ \c_tmp_dir -> - withCWString label $ \c_template -> - withCWString suffix $ \c_suffix -> - allocaBytes (sizeOf (undefined :: CWchar) * 260) $ \c_str -> do - res <- c_getTempFileNameErrorNo c_tmp_dir c_template c_suffix 0 - c_str - if not res - then do errno <- getErrno - ioError (errnoToIOError loc errno Nothing (Just tmp_dir)) - else do filename <- peekCWString c_str - handleResultsPosix filename - - handleResultsPosix filename = do - let oflags1 = rw_flags .|. o_EXCL - binary_flags - | binary = o_BINARY - | otherwise = 0 - oflags = oflags1 .|. binary_flags - fd <- withFilePath filename $ \ f -> c_open f oflags mode - case fd < 0 of - True -> do errno <- getErrno - ioError (errnoToIOError loc errno Nothing (Just tmp_dir)) - False -> - do (fD,fd_type) <- FD.mkFD fd ReadWriteMode Nothing{-no stat-} - False{-is_socket-} - True{-is_nonblock-} - - enc <- getLocaleEncoding - h <- POSIX.mkHandleFromFD fD fd_type filename ReadWriteMode - False{-set non-block-} (Just enc) - - return (filename, h) - - handleResultsWinIO filename excl = do - (hwnd, hwnd_type) <- openFileAsTemp filename True excl - mb_codec <- if binary then return Nothing else fmap Just getLocaleEncoding - - -- then use it to make a Handle - h <- mkHandleFromHANDLE hwnd hwnd_type filename ReadWriteMode mb_codec - `onException` IODevice.close hwnd - return (filename, h) - -foreign import ccall "getTempFileNameErrorNo" c_getTempFileNameErrorNo - :: CWString -> CWString -> CWString -> CUInt -> Ptr CWchar -> IO Bool - -foreign import ccall "__createUUIDTempFileErrNo" c_createUUIDTempFileErrNo - :: CWString -> CWString -> CWString -> Ptr CWString -> IO Bool - -pathSeparator :: String -> Bool -pathSeparator template = any (\x-> x == '/' || x == '\\') template - -output_flags = std_flags -#else /* else mingw32_HOST_OS */ - findTempName = do - rs <- rand_string - let filename = prefix ++ rs ++ suffix - filepath = tmp_dir `combine` filename - r <- openNewFile filepath binary mode - case r of - FileExists -> findTempName - OpenNewError errno -> ioError (errnoToIOError loc errno Nothing (Just tmp_dir)) - NewFileCreated fd -> do - (fD,fd_type) <- FD.mkFD fd ReadWriteMode Nothing{-no stat-} - False{-is_socket-} - True{-is_nonblock-} - - enc <- getLocaleEncoding - h <- POSIX.mkHandleFromFD fD fd_type filepath ReadWriteMode False{-set non-block-} (Just enc) - - return (filepath, h) - - where - -- XXX bits copied from System.FilePath, since that's not available here - combine a b - | null b = a - | null a = b - | pathSeparator [last a] = a ++ b - | otherwise = a ++ [pathSeparatorChar] ++ b - -tempCounter :: IORef Int -tempCounter = unsafePerformIO $ newIORef 0 -{-# NOINLINE tempCounter #-} - --- build large digit-alike number -rand_string :: IO String -rand_string = do - r1 <- c_getpid - (r2, _) <- atomicModifyIORef'_ tempCounter (+1) - return $ show r1 ++ "-" ++ show r2 - -data OpenNewFileResult - = NewFileCreated CInt - | FileExists - | OpenNewError Errno - -openNewFile :: FilePath -> Bool -> CMode -> IO OpenNewFileResult -openNewFile filepath binary mode = do - let oflags1 = rw_flags .|. o_EXCL - - binary_flags - | binary = o_BINARY - | otherwise = 0 - - oflags = oflags1 .|. binary_flags - fd <- withFilePath filepath $ \ f -> - c_open f oflags mode - if fd < 0 - then do - errno <- getErrno - case errno of - _ | errno == eEXIST -> return FileExists - _ -> return (OpenNewError errno) - else return (NewFileCreated fd) - --- XXX Should use filepath library -pathSeparatorChar :: Char -pathSeparatorChar = '/' - -pathSeparator :: String -> Bool -pathSeparator template = pathSeparatorChar `elem` template - -output_flags = std_flags .|. o_CREAT -#endif /* mingw32_HOST_OS */ - --- XXX Copied from GHC.Handle -std_flags, output_flags, rw_flags :: CInt -std_flags = o_NONBLOCK .|. o_NOCTTY -rw_flags = output_flags .|. o_RDWR ===================================== testsuite/tests/interface-stability/base-exports.stdout ===================================== @@ -7848,6 +7848,7 @@ module GHC.IO.Handle where hGetEcho :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool hGetEncoding :: Handle -> GHC.Internal.Types.IO (GHC.Internal.Maybe.Maybe GHC.Internal.IO.Encoding.Types.TextEncoding) hGetLine :: Handle -> GHC.Internal.Types.IO GHC.Internal.Base.String + hGetNewlineMode :: Handle -> GHC.Internal.Types.IO NewlineMode hGetPosn :: Handle -> GHC.Internal.Types.IO HandlePosn hIsClosed :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool hIsEOF :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool @@ -9452,7 +9453,7 @@ module GHC.Word where uncheckedShiftRL64# :: GHC.Internal.Prim.Word64# -> GHC.Internal.Prim.Int# -> GHC.Internal.Prim.Word64# module Numeric where - -- Safety: Safe + -- Safety: Trustworthy type Floating :: * -> Constraint class GHC.Internal.Real.Fractional a => Floating a where pi :: a @@ -9883,7 +9884,7 @@ module System.Exit where exitWith :: forall a. ExitCode -> GHC.Internal.Types.IO a module System.IO where - -- Safety: Safe + -- Safety: Trustworthy type BufferMode :: * data BufferMode = NoBuffering | LineBuffering | BlockBuffering (GHC.Internal.Maybe.Maybe GHC.Internal.Types.Int) type FilePath :: * @@ -12495,7 +12496,7 @@ instance forall a. GHC.Internal.Read.Read a => GHC.Internal.Read.Read (Data.Semi instance forall a. GHC.Internal.Read.Read a => GHC.Internal.Read.Read (Data.Semigroup.Min a) -- Defined in ‘Data.Semigroup’ instance forall m. GHC.Internal.Read.Read m => GHC.Internal.Read.Read (Data.Semigroup.WrappedMonoid m) -- Defined in ‘Data.Semigroup’ instance forall k (a :: k) (b :: k). Coercible a b => GHC.Internal.Read.Read (GHC.Internal.Data.Type.Coercion.Coercion a b) -- Defined in ‘GHC.Internal.Data.Type.Coercion’ -instance GHC.Internal.Read.Read GHC.Internal.Data.Version.Version -- Defined in ‘GHC.Internal.Data.Version’ +instance [safe] GHC.Internal.Read.Read GHC.Internal.Data.Version.Version -- Defined in ‘Data.Version’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.Ptr.IntPtr -- Defined in ‘GHC.Internal.Foreign.Ptr’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.Ptr.WordPtr -- Defined in ‘GHC.Internal.Foreign.Ptr’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CBool -- Defined in ‘GHC.Internal.Foreign.C.Types’ @@ -12524,7 +12525,7 @@ instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CULong -- Defined i instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CUSeconds -- Defined in ‘GHC.Internal.Foreign.C.Types’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CUShort -- Defined in ‘GHC.Internal.Foreign.C.Types’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CWchar -- Defined in ‘GHC.Internal.Foreign.C.Types’ -instance GHC.Internal.Read.Read GHC.Internal.ByteOrder.ByteOrder -- Defined in ‘GHC.Internal.ByteOrder’ +instance [safe] GHC.Internal.Read.Read GHC.Internal.ByteOrder.ByteOrder -- Defined in ‘GHC.ByteOrder’ instance forall k (f :: k -> *) (g :: k -> *) (p :: k). (GHC.Internal.Read.Read (f p), GHC.Internal.Read.Read (g p)) => GHC.Internal.Read.Read ((GHC.Internal.Generics.:*:) f g p) -- Defined in ‘GHC.Internal.Generics’ instance forall k (f :: k -> *) (g :: k -> *) (p :: k). (GHC.Internal.Read.Read (f p), GHC.Internal.Read.Read (g p)) => GHC.Internal.Read.Read ((GHC.Internal.Generics.:+:) f g p) -- Defined in ‘GHC.Internal.Generics’ instance forall k2 (f :: k2 -> *) k1 (g :: k1 -> k2) (p :: k1). GHC.Internal.Read.Read (f (g p)) => GHC.Internal.Read.Read ((GHC.Internal.Generics.:.:) f g p) -- Defined in ‘GHC.Internal.Generics’ @@ -12539,16 +12540,16 @@ instance GHC.Internal.Read.Read GHC.Internal.Generics.SourceStrictness -- Define instance GHC.Internal.Read.Read GHC.Internal.Generics.SourceUnpackedness -- Defined in ‘GHC.Internal.Generics’ instance forall k (p :: k). GHC.Internal.Read.Read (GHC.Internal.Generics.U1 p) -- Defined in ‘GHC.Internal.Generics’ instance forall k (p :: k). GHC.Internal.Read.Read (GHC.Internal.Generics.V1 p) -- Defined in ‘GHC.Internal.Generics’ -instance GHC.Internal.Read.Read GHC.Internal.IO.Device.SeekMode -- Defined in ‘GHC.Internal.IO.Device’ -instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.BufferMode -- Defined in ‘GHC.Internal.IO.Handle.Types’ -instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.Newline -- Defined in ‘GHC.Internal.IO.Handle.Types’ -instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.NewlineMode -- Defined in ‘GHC.Internal.IO.Handle.Types’ -instance GHC.Internal.Read.Read GHC.Internal.IO.IOMode.IOMode -- Defined in ‘GHC.Internal.IO.IOMode’ instance [safe] GHC.Internal.Read.Read GHC.Stats.GCDetails -- Defined in ‘GHC.Stats’ instance [safe] GHC.Internal.Read.Read GHC.Stats.RTSStats -- Defined in ‘GHC.Stats’ instance GHC.Internal.Read.Read GHC.Internal.TypeNats.SomeNat -- Defined in ‘GHC.Internal.TypeNats’ instance GHC.Internal.Read.Read GHC.Internal.TypeLits.SomeChar -- Defined in ‘GHC.Internal.TypeLits’ instance GHC.Internal.Read.Read GHC.Internal.TypeLits.SomeSymbol -- Defined in ‘GHC.Internal.TypeLits’ +instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.BufferMode -- Defined in ‘System.IO’ +instance GHC.Internal.Read.Read GHC.Internal.IO.IOMode.IOMode -- Defined in ‘System.IO’ +instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.Newline -- Defined in ‘System.IO’ +instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.NewlineMode -- Defined in ‘System.IO’ +instance GHC.Internal.Read.Read GHC.Internal.IO.Device.SeekMode -- Defined in ‘System.IO’ instance forall a k (b :: k). GHC.Internal.Real.Fractional a => GHC.Internal.Real.Fractional (GHC.Internal.Data.Functor.Const.Const a b) -- Defined in ‘GHC.Internal.Data.Functor.Const’ instance forall a. GHC.Internal.Float.RealFloat a => GHC.Internal.Real.Fractional (Data.Complex.Complex a) -- Defined in ‘Data.Complex’ instance forall k (a :: k). Data.Fixed.HasResolution a => GHC.Internal.Real.Fractional (Data.Fixed.Fixed a) -- Defined in ‘Data.Fixed’ ===================================== testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs ===================================== @@ -7820,6 +7820,7 @@ module GHC.IO.Handle where hGetEcho :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool hGetEncoding :: Handle -> GHC.Internal.Types.IO (GHC.Internal.Maybe.Maybe GHC.Internal.IO.Encoding.Types.TextEncoding) hGetLine :: Handle -> GHC.Internal.Types.IO GHC.Internal.Base.String + hGetNewlineMode :: Handle -> GHC.Internal.Types.IO NewlineMode hGetPosn :: Handle -> GHC.Internal.Types.IO HandlePosn hIsClosed :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool hIsEOF :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool @@ -9490,7 +9491,7 @@ module GHC.Word where uncheckedShiftRL64# :: GHC.Internal.Prim.Word64# -> GHC.Internal.Prim.Int# -> GHC.Internal.Prim.Word64# module Numeric where - -- Safety: Safe + -- Safety: Trustworthy type Floating :: * -> Constraint class GHC.Internal.Real.Fractional a => Floating a where pi :: a @@ -9921,7 +9922,7 @@ module System.Exit where exitWith :: forall a. ExitCode -> GHC.Internal.Types.IO a module System.IO where - -- Safety: Safe + -- Safety: Trustworthy type BufferMode :: * data BufferMode = NoBuffering | LineBuffering | BlockBuffering (GHC.Internal.Maybe.Maybe GHC.Internal.Types.Int) type FilePath :: * @@ -12524,7 +12525,7 @@ instance forall a. GHC.Internal.Read.Read a => GHC.Internal.Read.Read (Data.Semi instance forall a. GHC.Internal.Read.Read a => GHC.Internal.Read.Read (Data.Semigroup.Min a) -- Defined in ‘Data.Semigroup’ instance forall m. GHC.Internal.Read.Read m => GHC.Internal.Read.Read (Data.Semigroup.WrappedMonoid m) -- Defined in ‘Data.Semigroup’ instance forall k (a :: k) (b :: k). Coercible a b => GHC.Internal.Read.Read (GHC.Internal.Data.Type.Coercion.Coercion a b) -- Defined in ‘GHC.Internal.Data.Type.Coercion’ -instance GHC.Internal.Read.Read GHC.Internal.Data.Version.Version -- Defined in ‘GHC.Internal.Data.Version’ +instance [safe] GHC.Internal.Read.Read GHC.Internal.Data.Version.Version -- Defined in ‘Data.Version’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.Ptr.IntPtr -- Defined in ‘GHC.Internal.Foreign.Ptr’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.Ptr.WordPtr -- Defined in ‘GHC.Internal.Foreign.Ptr’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CBool -- Defined in ‘GHC.Internal.Foreign.C.Types’ @@ -12553,7 +12554,7 @@ instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CULong -- Defined i instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CUSeconds -- Defined in ‘GHC.Internal.Foreign.C.Types’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CUShort -- Defined in ‘GHC.Internal.Foreign.C.Types’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CWchar -- Defined in ‘GHC.Internal.Foreign.C.Types’ -instance GHC.Internal.Read.Read GHC.Internal.ByteOrder.ByteOrder -- Defined in ‘GHC.Internal.ByteOrder’ +instance [safe] GHC.Internal.Read.Read GHC.Internal.ByteOrder.ByteOrder -- Defined in ‘GHC.ByteOrder’ instance forall k (f :: k -> *) (g :: k -> *) (p :: k). (GHC.Internal.Read.Read (f p), GHC.Internal.Read.Read (g p)) => GHC.Internal.Read.Read ((GHC.Internal.Generics.:*:) f g p) -- Defined in ‘GHC.Internal.Generics’ instance forall k (f :: k -> *) (g :: k -> *) (p :: k). (GHC.Internal.Read.Read (f p), GHC.Internal.Read.Read (g p)) => GHC.Internal.Read.Read ((GHC.Internal.Generics.:+:) f g p) -- Defined in ‘GHC.Internal.Generics’ instance forall k2 (f :: k2 -> *) k1 (g :: k1 -> k2) (p :: k1). GHC.Internal.Read.Read (f (g p)) => GHC.Internal.Read.Read ((GHC.Internal.Generics.:.:) f g p) -- Defined in ‘GHC.Internal.Generics’ @@ -12568,16 +12569,16 @@ instance GHC.Internal.Read.Read GHC.Internal.Generics.SourceStrictness -- Define instance GHC.Internal.Read.Read GHC.Internal.Generics.SourceUnpackedness -- Defined in ‘GHC.Internal.Generics’ instance forall k (p :: k). GHC.Internal.Read.Read (GHC.Internal.Generics.U1 p) -- Defined in ‘GHC.Internal.Generics’ instance forall k (p :: k). GHC.Internal.Read.Read (GHC.Internal.Generics.V1 p) -- Defined in ‘GHC.Internal.Generics’ -instance GHC.Internal.Read.Read GHC.Internal.IO.Device.SeekMode -- Defined in ‘GHC.Internal.IO.Device’ -instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.BufferMode -- Defined in ‘GHC.Internal.IO.Handle.Types’ -instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.Newline -- Defined in ‘GHC.Internal.IO.Handle.Types’ -instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.NewlineMode -- Defined in ‘GHC.Internal.IO.Handle.Types’ -instance GHC.Internal.Read.Read GHC.Internal.IO.IOMode.IOMode -- Defined in ‘GHC.Internal.IO.IOMode’ instance [safe] GHC.Internal.Read.Read GHC.Stats.GCDetails -- Defined in ‘GHC.Stats’ instance [safe] GHC.Internal.Read.Read GHC.Stats.RTSStats -- Defined in ‘GHC.Stats’ instance GHC.Internal.Read.Read GHC.Internal.TypeNats.SomeNat -- Defined in ‘GHC.Internal.TypeNats’ instance GHC.Internal.Read.Read GHC.Internal.TypeLits.SomeChar -- Defined in ‘GHC.Internal.TypeLits’ instance GHC.Internal.Read.Read GHC.Internal.TypeLits.SomeSymbol -- Defined in ‘GHC.Internal.TypeLits’ +instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.BufferMode -- Defined in ‘System.IO’ +instance GHC.Internal.Read.Read GHC.Internal.IO.IOMode.IOMode -- Defined in ‘System.IO’ +instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.Newline -- Defined in ‘System.IO’ +instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.NewlineMode -- Defined in ‘System.IO’ +instance GHC.Internal.Read.Read GHC.Internal.IO.Device.SeekMode -- Defined in ‘System.IO’ instance forall a k (b :: k). GHC.Internal.Real.Fractional a => GHC.Internal.Real.Fractional (GHC.Internal.Data.Functor.Const.Const a b) -- Defined in ‘GHC.Internal.Data.Functor.Const’ instance forall a. GHC.Internal.Float.RealFloat a => GHC.Internal.Real.Fractional (Data.Complex.Complex a) -- Defined in ‘Data.Complex’ instance forall k (a :: k). Data.Fixed.HasResolution a => GHC.Internal.Real.Fractional (Data.Fixed.Fixed a) -- Defined in ‘Data.Fixed’ ===================================== testsuite/tests/interface-stability/base-exports.stdout-mingw32 ===================================== @@ -8012,6 +8012,7 @@ module GHC.IO.Handle where hGetEcho :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool hGetEncoding :: Handle -> GHC.Internal.Types.IO (GHC.Internal.Maybe.Maybe GHC.Internal.IO.Encoding.Types.TextEncoding) hGetLine :: Handle -> GHC.Internal.Types.IO GHC.Internal.Base.String + hGetNewlineMode :: Handle -> GHC.Internal.Types.IO NewlineMode hGetPosn :: Handle -> GHC.Internal.Types.IO HandlePosn hIsClosed :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool hIsEOF :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool @@ -9732,7 +9733,7 @@ module GHC.Word where uncheckedShiftRL64# :: GHC.Internal.Prim.Word64# -> GHC.Internal.Prim.Int# -> GHC.Internal.Prim.Word64# module Numeric where - -- Safety: Safe + -- Safety: Trustworthy type Floating :: * -> Constraint class GHC.Internal.Real.Fractional a => Floating a where pi :: a @@ -10163,7 +10164,7 @@ module System.Exit where exitWith :: forall a. ExitCode -> GHC.Internal.Types.IO a module System.IO where - -- Safety: Safe + -- Safety: Trustworthy type BufferMode :: * data BufferMode = NoBuffering | LineBuffering | BlockBuffering (GHC.Internal.Maybe.Maybe GHC.Internal.Types.Int) type FilePath :: * @@ -12766,7 +12767,7 @@ instance forall a. GHC.Internal.Read.Read a => GHC.Internal.Read.Read (Data.Semi instance forall a. GHC.Internal.Read.Read a => GHC.Internal.Read.Read (Data.Semigroup.Min a) -- Defined in ‘Data.Semigroup’ instance forall m. GHC.Internal.Read.Read m => GHC.Internal.Read.Read (Data.Semigroup.WrappedMonoid m) -- Defined in ‘Data.Semigroup’ instance forall k (a :: k) (b :: k). Coercible a b => GHC.Internal.Read.Read (GHC.Internal.Data.Type.Coercion.Coercion a b) -- Defined in ‘GHC.Internal.Data.Type.Coercion’ -instance GHC.Internal.Read.Read GHC.Internal.Data.Version.Version -- Defined in ‘GHC.Internal.Data.Version’ +instance [safe] GHC.Internal.Read.Read GHC.Internal.Data.Version.Version -- Defined in ‘Data.Version’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.Ptr.IntPtr -- Defined in ‘GHC.Internal.Foreign.Ptr’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.Ptr.WordPtr -- Defined in ‘GHC.Internal.Foreign.Ptr’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CBool -- Defined in ‘GHC.Internal.Foreign.C.Types’ @@ -12795,7 +12796,7 @@ instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CULong -- Defined i instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CUSeconds -- Defined in ‘GHC.Internal.Foreign.C.Types’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CUShort -- Defined in ‘GHC.Internal.Foreign.C.Types’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CWchar -- Defined in ‘GHC.Internal.Foreign.C.Types’ -instance GHC.Internal.Read.Read GHC.Internal.ByteOrder.ByteOrder -- Defined in ‘GHC.Internal.ByteOrder’ +instance [safe] GHC.Internal.Read.Read GHC.Internal.ByteOrder.ByteOrder -- Defined in ‘GHC.ByteOrder’ instance GHC.Internal.Read.Read GHC.Internal.Event.Windows.ConsoleEvent.ConsoleEvent -- Defined in ‘GHC.Internal.Event.Windows.ConsoleEvent’ instance forall k (f :: k -> *) (g :: k -> *) (p :: k). (GHC.Internal.Read.Read (f p), GHC.Internal.Read.Read (g p)) => GHC.Internal.Read.Read ((GHC.Internal.Generics.:*:) f g p) -- Defined in ‘GHC.Internal.Generics’ instance forall k (f :: k -> *) (g :: k -> *) (p :: k). (GHC.Internal.Read.Read (f p), GHC.Internal.Read.Read (g p)) => GHC.Internal.Read.Read ((GHC.Internal.Generics.:+:) f g p) -- Defined in ‘GHC.Internal.Generics’ @@ -12811,16 +12812,16 @@ instance GHC.Internal.Read.Read GHC.Internal.Generics.SourceStrictness -- Define instance GHC.Internal.Read.Read GHC.Internal.Generics.SourceUnpackedness -- Defined in ‘GHC.Internal.Generics’ instance forall k (p :: k). GHC.Internal.Read.Read (GHC.Internal.Generics.U1 p) -- Defined in ‘GHC.Internal.Generics’ instance forall k (p :: k). GHC.Internal.Read.Read (GHC.Internal.Generics.V1 p) -- Defined in ‘GHC.Internal.Generics’ -instance GHC.Internal.Read.Read GHC.Internal.IO.Device.SeekMode -- Defined in ‘GHC.Internal.IO.Device’ -instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.BufferMode -- Defined in ‘GHC.Internal.IO.Handle.Types’ -instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.Newline -- Defined in ‘GHC.Internal.IO.Handle.Types’ -instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.NewlineMode -- Defined in ‘GHC.Internal.IO.Handle.Types’ -instance GHC.Internal.Read.Read GHC.Internal.IO.IOMode.IOMode -- Defined in ‘GHC.Internal.IO.IOMode’ instance [safe] GHC.Internal.Read.Read GHC.Stats.GCDetails -- Defined in ‘GHC.Stats’ instance [safe] GHC.Internal.Read.Read GHC.Stats.RTSStats -- Defined in ‘GHC.Stats’ instance GHC.Internal.Read.Read GHC.Internal.TypeNats.SomeNat -- Defined in ‘GHC.Internal.TypeNats’ instance GHC.Internal.Read.Read GHC.Internal.TypeLits.SomeChar -- Defined in ‘GHC.Internal.TypeLits’ instance GHC.Internal.Read.Read GHC.Internal.TypeLits.SomeSymbol -- Defined in ‘GHC.Internal.TypeLits’ +instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.BufferMode -- Defined in ‘System.IO’ +instance GHC.Internal.Read.Read GHC.Internal.IO.IOMode.IOMode -- Defined in ‘System.IO’ +instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.Newline -- Defined in ‘System.IO’ +instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.NewlineMode -- Defined in ‘System.IO’ +instance GHC.Internal.Read.Read GHC.Internal.IO.Device.SeekMode -- Defined in ‘System.IO’ instance forall a k (b :: k). GHC.Internal.Real.Fractional a => GHC.Internal.Real.Fractional (GHC.Internal.Data.Functor.Const.Const a b) -- Defined in ‘GHC.Internal.Data.Functor.Const’ instance forall a. GHC.Internal.Float.RealFloat a => GHC.Internal.Real.Fractional (Data.Complex.Complex a) -- Defined in ‘Data.Complex’ instance forall k (a :: k). Data.Fixed.HasResolution a => GHC.Internal.Real.Fractional (Data.Fixed.Fixed a) -- Defined in ‘Data.Fixed’ ===================================== testsuite/tests/interface-stability/base-exports.stdout-ws-32 ===================================== @@ -7848,6 +7848,7 @@ module GHC.IO.Handle where hGetEcho :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool hGetEncoding :: Handle -> GHC.Internal.Types.IO (GHC.Internal.Maybe.Maybe GHC.Internal.IO.Encoding.Types.TextEncoding) hGetLine :: Handle -> GHC.Internal.Types.IO GHC.Internal.Base.String + hGetNewlineMode :: Handle -> GHC.Internal.Types.IO NewlineMode hGetPosn :: Handle -> GHC.Internal.Types.IO HandlePosn hIsClosed :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool hIsEOF :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool @@ -9452,7 +9453,7 @@ module GHC.Word where uncheckedShiftRL64# :: GHC.Internal.Prim.Word64# -> GHC.Internal.Prim.Int# -> GHC.Internal.Prim.Word64# module Numeric where - -- Safety: Safe + -- Safety: Trustworthy type Floating :: * -> Constraint class GHC.Internal.Real.Fractional a => Floating a where pi :: a @@ -9883,7 +9884,7 @@ module System.Exit where exitWith :: forall a. ExitCode -> GHC.Internal.Types.IO a module System.IO where - -- Safety: Safe + -- Safety: Trustworthy type BufferMode :: * data BufferMode = NoBuffering | LineBuffering | BlockBuffering (GHC.Internal.Maybe.Maybe GHC.Internal.Types.Int) type FilePath :: * @@ -12495,7 +12496,7 @@ instance forall a. GHC.Internal.Read.Read a => GHC.Internal.Read.Read (Data.Semi instance forall a. GHC.Internal.Read.Read a => GHC.Internal.Read.Read (Data.Semigroup.Min a) -- Defined in ‘Data.Semigroup’ instance forall m. GHC.Internal.Read.Read m => GHC.Internal.Read.Read (Data.Semigroup.WrappedMonoid m) -- Defined in ‘Data.Semigroup’ instance forall k (a :: k) (b :: k). Coercible a b => GHC.Internal.Read.Read (GHC.Internal.Data.Type.Coercion.Coercion a b) -- Defined in ‘GHC.Internal.Data.Type.Coercion’ -instance GHC.Internal.Read.Read GHC.Internal.Data.Version.Version -- Defined in ‘GHC.Internal.Data.Version’ +instance [safe] GHC.Internal.Read.Read GHC.Internal.Data.Version.Version -- Defined in ‘Data.Version’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.Ptr.IntPtr -- Defined in ‘GHC.Internal.Foreign.Ptr’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.Ptr.WordPtr -- Defined in ‘GHC.Internal.Foreign.Ptr’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CBool -- Defined in ‘GHC.Internal.Foreign.C.Types’ @@ -12524,7 +12525,7 @@ instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CULong -- Defined i instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CUSeconds -- Defined in ‘GHC.Internal.Foreign.C.Types’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CUShort -- Defined in ‘GHC.Internal.Foreign.C.Types’ instance GHC.Internal.Read.Read GHC.Internal.Foreign.C.Types.CWchar -- Defined in ‘GHC.Internal.Foreign.C.Types’ -instance GHC.Internal.Read.Read GHC.Internal.ByteOrder.ByteOrder -- Defined in ‘GHC.Internal.ByteOrder’ +instance [safe] GHC.Internal.Read.Read GHC.Internal.ByteOrder.ByteOrder -- Defined in ‘GHC.ByteOrder’ instance forall k (f :: k -> *) (g :: k -> *) (p :: k). (GHC.Internal.Read.Read (f p), GHC.Internal.Read.Read (g p)) => GHC.Internal.Read.Read ((GHC.Internal.Generics.:*:) f g p) -- Defined in ‘GHC.Internal.Generics’ instance forall k (f :: k -> *) (g :: k -> *) (p :: k). (GHC.Internal.Read.Read (f p), GHC.Internal.Read.Read (g p)) => GHC.Internal.Read.Read ((GHC.Internal.Generics.:+:) f g p) -- Defined in ‘GHC.Internal.Generics’ instance forall k2 (f :: k2 -> *) k1 (g :: k1 -> k2) (p :: k1). GHC.Internal.Read.Read (f (g p)) => GHC.Internal.Read.Read ((GHC.Internal.Generics.:.:) f g p) -- Defined in ‘GHC.Internal.Generics’ @@ -12539,16 +12540,16 @@ instance GHC.Internal.Read.Read GHC.Internal.Generics.SourceStrictness -- Define instance GHC.Internal.Read.Read GHC.Internal.Generics.SourceUnpackedness -- Defined in ‘GHC.Internal.Generics’ instance forall k (p :: k). GHC.Internal.Read.Read (GHC.Internal.Generics.U1 p) -- Defined in ‘GHC.Internal.Generics’ instance forall k (p :: k). GHC.Internal.Read.Read (GHC.Internal.Generics.V1 p) -- Defined in ‘GHC.Internal.Generics’ -instance GHC.Internal.Read.Read GHC.Internal.IO.Device.SeekMode -- Defined in ‘GHC.Internal.IO.Device’ -instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.BufferMode -- Defined in ‘GHC.Internal.IO.Handle.Types’ -instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.Newline -- Defined in ‘GHC.Internal.IO.Handle.Types’ -instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.NewlineMode -- Defined in ‘GHC.Internal.IO.Handle.Types’ -instance GHC.Internal.Read.Read GHC.Internal.IO.IOMode.IOMode -- Defined in ‘GHC.Internal.IO.IOMode’ instance [safe] GHC.Internal.Read.Read GHC.Stats.GCDetails -- Defined in ‘GHC.Stats’ instance [safe] GHC.Internal.Read.Read GHC.Stats.RTSStats -- Defined in ‘GHC.Stats’ instance GHC.Internal.Read.Read GHC.Internal.TypeNats.SomeNat -- Defined in ‘GHC.Internal.TypeNats’ instance GHC.Internal.Read.Read GHC.Internal.TypeLits.SomeChar -- Defined in ‘GHC.Internal.TypeLits’ instance GHC.Internal.Read.Read GHC.Internal.TypeLits.SomeSymbol -- Defined in ‘GHC.Internal.TypeLits’ +instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.BufferMode -- Defined in ‘System.IO’ +instance GHC.Internal.Read.Read GHC.Internal.IO.IOMode.IOMode -- Defined in ‘System.IO’ +instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.Newline -- Defined in ‘System.IO’ +instance GHC.Internal.Read.Read GHC.Internal.IO.Handle.Types.NewlineMode -- Defined in ‘System.IO’ +instance GHC.Internal.Read.Read GHC.Internal.IO.Device.SeekMode -- Defined in ‘System.IO’ instance forall a k (b :: k). GHC.Internal.Real.Fractional a => GHC.Internal.Real.Fractional (GHC.Internal.Data.Functor.Const.Const a b) -- Defined in ‘GHC.Internal.Data.Functor.Const’ instance forall a. GHC.Internal.Float.RealFloat a => GHC.Internal.Real.Fractional (Data.Complex.Complex a) -- Defined in ‘Data.Complex’ instance forall k (a :: k). Data.Fixed.HasResolution a => GHC.Internal.Real.Fractional (Data.Fixed.Fixed a) -- Defined in ‘Data.Fixed’ View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/2543e91b140ab550e40da5e7024a08… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/2543e91b140ab550e40da5e7024a08… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/jeltsch/system-io-implementation-into-base] Move the `System.IO` implementation into `base`
by Wolfgang Jeltsch (＠jeltsch) 13 Mar '26

13 Mar '26

Wolfgang Jeltsch pushed to branch wip/jeltsch/system-io-implementation-into-base at Glasgow Haskell Compiler / GHC Commits: fca4d682 by Wolfgang Jeltsch at 2026-03-13T16:56:51+02:00 Move the `System.IO` implementation into `base` - - - - - 9 changed files: - libraries/base/src/GHC/IO/Handle.hs - libraries/base/src/Prelude.hs - libraries/base/src/System/IO.hs - libraries/base/src/Text/Printf.hs - libraries/ghc-internal/src/GHC/Internal/System/IO.hs - testsuite/tests/interface-stability/base-exports.stdout - testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs - testsuite/tests/interface-stability/base-exports.stdout-mingw32 - testsuite/tests/interface-stability/base-exports.stdout-ws-32 Changes: ===================================== libraries/base/src/GHC/IO/Handle.hs ===================================== @@ -53,6 +53,7 @@ module GHC.IO.Handle hGetEcho, hIsTerminalDevice, hSetNewlineMode, + hGetNewlineMode, Newline(..), NewlineMode(..), nativeNewline, ===================================== libraries/base/src/Prelude.hs ===================================== @@ -165,7 +165,7 @@ module Prelude ( ) where import GHC.Internal.Control.Monad -import GHC.Internal.System.IO +import System.IO import GHC.Internal.System.IO.Error import qualified GHC.Internal.Data.List as List import GHC.Internal.Data.Either ===================================== libraries/base/src/System/IO.hs ===================================== @@ -1,4 +1,5 @@ -{-# LANGUAGE Safe #-} +{-# LANGUAGE Trustworthy #-} +{-# LANGUAGE CPP #-} -- | -- @@ -184,8 +185,666 @@ module System.IO nativeNewlineMode ) where -import GHC.Internal.System.IO +import GHC.Internal.System.IO (putStrLn, print) + +import GHC.Base (Bool (False, True), otherwise, failIO) +import GHC.Err (errorWithoutStackTrace) +import GHC.List (null, elem, last, (++), reverse, break) +import GHC.Num ((+)) +import GHC.IO (IO, FilePath) +import GHC.IO.IOMode (IOMode (ReadMode, WriteMode, ReadWriteMode, AppendMode)) +import qualified GHC.Internal.IO.FD as FD +import GHC.IO.Encoding + ( + TextEncoding, + mkTextEncoding, + getLocaleEncoding, + initLocaleEncoding, + utf8, + utf8_bom, + utf16, + utf16be, + utf16le, + utf32, + utf32be, + utf32le, + latin1, + char8 + ) +import GHC.IO.Handle + ( + Handle, + hLookAhead, + hFlush, + hClose, + hSetBinaryMode, + hSetEncoding, + hSetNewlineMode, + hSetEcho, + hSetFileSize, + hGetEncoding, + hGetNewlineMode, + hGetEcho, + hFileSize, + hIsOpen, + hIsReadable, + hIsSeekable, + hIsWritable, + hIsTerminalDevice, + hIsEOF, + hIsClosed, + hShow, + BufferMode (NoBuffering, LineBuffering, BlockBuffering), + hSetBuffering, + hGetBuffering, + HandlePosn, + hSetPosn, + hGetPosn, + SeekMode (AbsoluteSeek, RelativeSeek, SeekFromEnd), + hSeek, + hTell, + Newline (LF, CRLF), + nativeNewline, + NewlineMode (NewlineMode, inputNL, outputNL), + noNewlineTranslation, + nativeNewlineMode, + universalNewlineMode, + isEOF + ) +import GHC.IO.Handle.Text + ( + hPutChar, + hPutStr, + hPutStrLn, + hPutBuf, + hPutBufNonBlocking, + hGetChar, + hGetContents, + hGetContents', + hGetLine, + hGetBuf, + hGetBufNonBlocking, + hGetBufSome, + hWaitForInput + ) +import qualified GHC.Internal.IO.Handle.FD as POSIX +import GHC.IO.StdHandles + ( + openBinaryFile, + withBinaryFile, + openFile, + withFile, + stdin, + stdout, + stderr + ) +import GHC.IORef (atomicModifyIORef'_) import GHC.Internal.Control.Monad.Fix (fixIO) +import Control.Monad (return, (>>=)) +import Control.Exception (ioError) +import Data.Eq ((==)) +import Data.Ord ((<)) +import Data.Bits ((.|.)) +import Data.Function (($), (.)) +import Data.Maybe (Maybe (Nothing, Just)) +import Data.Char (Char) +import Data.String (String) +import Data.Int (Int) +import Data.IORef (IORef, newIORef) +import System.IO.Error (userError) +import System.IO.Unsafe (unsafePerformIO) +import System.Posix.Internals + ( + c_getpid, + c_open, + o_CREAT, + o_EXCL, + o_BINARY, + o_NONBLOCK, + o_RDWR, + o_NOCTTY, + withFilePath + ) +import System.Posix.Types (CMode) +import Text.Read (lex, Read, reads) +import Text.Show (Show, show) +import Foreign.C.Types (CInt) +import Foreign.C.Error (Errno, eEXIST, getErrno, errnoToIOError) + +#if defined(mingw32_HOST_OS) +import GHC.IO.SubSystem +import GHC.IO.Windows.Handle (openFileAsTemp) +import GHC.IO.Handle.Windows (mkHandleFromHANDLE) +import GHC.IO.Device as IODevice +import GHC.Internal.Real (fromIntegral) +import Foreign.C.String +import Foreign.Ptr +import Foreign.Marshal.Alloc +import Foreign.Marshal.Utils (with) +import Foreign.Storable +#endif + +----------------------------------------------------------------------------- +-- Standard IO + +-- | Write a character to the standard output device +-- +-- 'putChar' is implemented as @'hPutChar' 'stdout'@. +-- +-- This operation may fail with the same errors as 'hPutChar'. +-- +-- ==== __Examples__ +-- +-- Note that the following do not put a newline. +-- +-- >>> putChar 'x' +-- x +-- +-- >>> putChar '\0042' +-- * +putChar :: Char -> IO () +putChar c = hPutChar stdout c + +-- | Write a string to the standard output device +-- +-- 'putStr' is implemented as @'hPutStr' 'stdout'@. +-- +-- This operation may fail with the same errors, and has the same issues with concurrency, as 'hPutStr'! +-- +-- ==== __Examples__ +-- +-- Note that the following do not put a newline. +-- +-- >>> putStr "Hello, World!" +-- Hello, World! +-- +-- >>> putStr "\0052\0042\0050" +-- 4*2 +-- +putStr :: String -> IO () +putStr s = hPutStr stdout s + +-- | Read a single character from the standard input device. +-- +-- 'getChar' is implemented as @'hGetChar' 'stdin'@. +-- +-- This operation may fail with the same errors as 'hGetChar'. +-- +-- ==== __Examples__ +-- +-- >>> getChar +-- a'a' +-- +-- >>> getChar +-- > +-- '\n' +getChar :: IO Char +getChar = hGetChar stdin + +-- | Read a line from the standard input device. +-- +-- 'getLine' is implemented as @'hGetLine' 'stdin'@. +-- +-- This operation may fail with the same errors as 'hGetLine'. +-- +-- ==== __Examples__ +-- +-- >>> getLine +-- > Hello World! +-- "Hello World!" +-- +-- >>> getLine +-- > +-- "" +getLine :: IO String +getLine = hGetLine stdin + +-- | The 'getContents' operation returns all user input as a single string, +-- which is read lazily as it is needed. +-- +-- 'getContents' is implemented as @'hGetContents' 'stdin'@. +-- +-- This operation may fail with the same errors as 'hGetContents'. +-- +-- ==== __Examples__ +-- +-- >>> getContents >>= putStr +-- > aaabbbccc :D +-- aaabbbccc :D +-- > I hope you have a great day +-- I hope you have a great day +-- > ^D +-- +-- >>> getContents >>= print . length +-- > abc +-- > <3 +-- > def ^D +-- 11 +getContents :: IO String +getContents = hGetContents stdin + +-- | The 'getContents'' operation returns all user input as a single string, +-- which is fully read before being returned +-- +-- 'getContents'' is implemented as @'hGetContents'' 'stdin'@. +-- +-- This operation may fail with the same errors as 'hGetContents''. +-- +-- ==== __Examples__ +-- +-- >>> getContents' >>= putStr +-- > aaabbbccc :D +-- > I hope you have a great day +-- aaabbbccc :D +-- I hope you have a great day +-- +-- >>> getContents' >>= print . length +-- > abc +-- > <3 +-- > def ^D +-- 11 +-- +-- @since base-4.15.0.0 +getContents' :: IO String +getContents' = hGetContents' stdin + +-- | @'interact' f@ takes the entire input from 'stdin' and applies @f@ to it. +-- The resulting string is written to the 'stdout' device. +-- +-- Note that this operation is lazy, which allows to produce output +-- even before all input has been consumed. +-- +-- This operation may fail with the same errors as 'getContents' and 'putStr'. +-- +-- If it doesn't produce output the buffering settings may not be +-- correct, use ^D (ctrl+D) to close stdin which forces +-- the buffer to be consumed. +-- +-- You may wish to set the buffering style appropriate to your program's +-- needs before using this function, for example: +-- +-- @ +-- main :: IO () +-- main = do +-- hSetBuffering stdin LineBuffering +-- hSetBuffering stdout NoBuffering +-- interact (concatMap (\str -> str ++ str) . L.lines) +-- @ +-- +-- ==== __Examples__ +-- +-- >>> interact (\str -> str ++ str) +-- > hi :) +-- hi :) +-- > ^D +-- hi :) +-- +-- >>> interact (const ":D") +-- :D +-- +-- >>> interact (show . words) +-- > hello world! +-- > I hope you have a great day +-- > ^D +-- ["hello","world!","I","hope","you","have","a","great","day"] +interact :: (String -> String) -> IO () +interact f = do s <- getContents + putStr (f s) + +-- | The 'readFile' function reads a file and +-- returns the contents of the file as a string. +-- +-- The file is read lazily, on demand, as with 'getContents'. +-- +-- This operation may fail with the same errors as 'hGetContents' and 'openFile'. +-- +-- ==== __Examples__ +-- +-- >>> readFile "~/hello_world" +-- "Greetings!" +-- +-- >>> take 5 <$> readFile "/dev/zero" +-- "\NUL\NUL\NUL\NUL\NUL" +readFile :: FilePath -> IO String +readFile name = openFile name ReadMode >>= hGetContents + +-- | The 'readFile'' function reads a file and +-- returns the contents of the file as a string. +-- +-- This is identical to 'readFile', but the file is fully read before being returned, +-- as with 'getContents''. +-- +-- @since base-4.15.0.0 +readFile' :: FilePath -> IO String +-- There's a bit of overkill here—both withFile and +-- hGetContents' will close the file in the end. +readFile' name = withFile name ReadMode hGetContents' + +-- | The computation @'writeFile' file str@ function writes the string @str@, +-- to the file @file@. +-- +-- This operation may fail with the same errors as 'hPutStr' and 'withFile'. +-- +-- ==== __Examples__ +-- +-- >>> writeFile "hello" "world" >> readFile "hello" +-- "world" +-- +-- >>> writeFile "~/" "D:" +-- *** Exception: ~/: withFile: inappropriate type (Is a directory) +writeFile :: FilePath -> String -> IO () +writeFile f txt = withFile f WriteMode (\ hdl -> hPutStr hdl txt) + +-- | The computation @'appendFile' file str@ function appends the string @str@, +-- to the file @file@. +-- +-- Note that 'writeFile' and 'appendFile' write a literal string +-- to a file. To write a value of any printable type, as with 'print', +-- use the 'show' function to convert the value to a string first. +-- +-- This operation may fail with the same errors as 'hPutStr' and 'withFile'. +-- +-- ==== __Examples__ +-- +-- The following example could be more efficently written by acquiring a handle +-- instead with 'openFile' and using the computations capable of writing to handles +-- such as 'hPutStr'. +-- +-- >>> let fn = "hello_world" +-- >>> in writeFile fn "hello" >> appendFile fn " world!" >> (readFile fn >>= putStrLn) +-- "hello world!" +-- +-- >>> let fn = "foo"; output = readFile' fn >>= putStrLn +-- >>> in output >> appendFile fn (show [1,2,3]) >> output +-- this is what's in the file +-- this is what's in the file[1,2,3] +appendFile :: FilePath -> String -> IO () +appendFile f txt = withFile f AppendMode (\ hdl -> hPutStr hdl txt) + +-- | The 'readLn' function combines 'getLine' and 'readIO'. +-- +-- This operation may fail with the same errors as 'getLine' and 'readIO'. +-- +-- ==== __Examples__ +-- +-- >>> fmap (+ 5) readLn +-- > 25 +-- 30 +-- +-- >>> readLn :: IO String +-- > this is not a string literal +-- *** Exception: user error (Prelude.readIO: no parse) +readLn :: Read a => IO a +readLn = getLine >>= readIO + +-- | The 'readIO' function is similar to 'read' except that it signals +-- parse failure to the 'IO' monad instead of terminating the program. +-- +-- This operation may fail with: +-- +-- * 'GHC.Internal.System.IO.Error.isUserError' if there is no unambiguous parse. +-- +-- ==== __Examples__ +-- +-- >>> fmap (+ 1) (readIO "1") +-- 2 +-- +-- >>> readIO "not quite ()" :: IO () +-- *** Exception: user error (Prelude.readIO: no parse) +readIO :: Read a => String -> IO a +readIO s = case (do { (x,t) <- reads s ; + ("","") <- lex t ; + return x }) of + [x] -> return x + [] -> ioError (userError "Prelude.readIO: no parse") + _ -> ioError (userError "Prelude.readIO: ambiguous parse") + +-- | The encoding of the current locale. +-- +-- This is the initial locale encoding: if it has been subsequently changed by +-- 'GHC.Internal.IO.Encoding.setLocaleEncoding' this value will not reflect that change. +localeEncoding :: TextEncoding +localeEncoding = initLocaleEncoding + +-- | Computation 'hReady' @hdl@ indicates whether at least one item is +-- available for input from handle @hdl@. +-- +-- This operation may fail with: +-- +-- * 'GHC.Internal.System.IO.Error.isEOFError' if the end of file has been reached. +hReady :: Handle -> IO Bool +hReady h = hWaitForInput h 0 + +-- | Computation 'hPrint' @hdl t@ writes the string representation of @t@ +-- given by the 'show' function to the file or channel managed by @hdl@ +-- and appends a newline. +-- +-- This operation may fail with the same errors as 'hPutStrLn' +-- +-- ==== __Examples__ +-- +-- >>> hPrint stdout [1,2,3] +-- [1,2,3] +-- +-- >>> hPrint stdin [4,5,6] +-- *** Exception: <stdin>: hPutStr: illegal operation (handle is not open for writing) +hPrint :: Show a => Handle -> a -> IO () +hPrint hdl = hPutStrLn hdl . show + +-- | The function creates a temporary file in ReadWrite mode. +-- The created file isn\'t deleted automatically, so you need to delete it manually. +-- +-- The file is created with permissions such that only the current +-- user can read\/write it. +-- +-- With some exceptions (see below), the file will be created securely +-- in the sense that an attacker should not be able to cause +-- openTempFile to overwrite another file on the filesystem using your +-- credentials, by putting symbolic links (on Unix) in the place where +-- the temporary file is to be created. On Unix the @O_CREAT@ and +-- @O_EXCL@ flags are used to prevent this attack, but note that +-- @O_EXCL@ is sometimes not supported on NFS filesystems, so if you +-- rely on this behaviour it is best to use local filesystems only. +openTempFile :: FilePath -- ^ Directory in which to create the file + -> String -- ^ File name template. If the template is \"foo.ext\" then + -- the created file will be \"fooXXX.ext\" where XXX is some + -- random number. Note that this should not contain any path + -- separator characters. On Windows, the template prefix may + -- be truncated to 3 chars, e.g. \"foobar.ext\" will be + -- \"fooXXX.ext\". + -> IO (FilePath, Handle) +openTempFile tmp_dir template + = openTempFile' "openTempFile" tmp_dir template False 0o600 + +-- | Like 'openTempFile', but opens the file in binary mode. See 'openBinaryFile' for more comments. +openBinaryTempFile :: FilePath -> String -> IO (FilePath, Handle) +openBinaryTempFile tmp_dir template + = openTempFile' "openBinaryTempFile" tmp_dir template True 0o600 + +-- | Like 'openTempFile', but uses the default file permissions +openTempFileWithDefaultPermissions :: FilePath -> String + -> IO (FilePath, Handle) +openTempFileWithDefaultPermissions tmp_dir template + = openTempFile' "openTempFileWithDefaultPermissions" tmp_dir template False 0o666 + +-- | Like 'openBinaryTempFile', but uses the default file permissions +openBinaryTempFileWithDefaultPermissions :: FilePath -> String + -> IO (FilePath, Handle) +openBinaryTempFileWithDefaultPermissions tmp_dir template + = openTempFile' "openBinaryTempFileWithDefaultPermissions" tmp_dir template True 0o666 + +openTempFile' :: String -> FilePath -> String -> Bool -> CMode + -> IO (FilePath, Handle) +openTempFile' loc tmp_dir template binary mode + | pathSeparator template + = failIO $ "openTempFile': Template string must not contain path separator characters: "++template + | otherwise = findTempName + where + -- We split off the last extension, so we can use .foo.ext files + -- for temporary files (hidden on Unix OSes). Unfortunately we're + -- below filepath in the hierarchy here. + (prefix, suffix) = + case break (== '.') $ reverse template of + -- First case: template contains no '.'s. Just re-reverse it. + (rev_suffix, "") -> (reverse rev_suffix, "") + -- Second case: template contains at least one '.'. Strip the + -- dot from the prefix and prepend it to the suffix (if we don't + -- do this, the unique number will get added after the '.' and + -- thus be part of the extension, which is wrong.) + (rev_suffix, '.':rest) -> (reverse rest, '.':reverse rev_suffix) + -- Otherwise, something is wrong, because (break (== '.')) should + -- always return a pair with either the empty string or a string + -- beginning with '.' as the second component. + _ -> errorWithoutStackTrace "bug in GHC.Internal.System.IO.openTempFile" +#if defined(mingw32_HOST_OS) + findTempName = findTempNamePosix <!> findTempNameWinIO + + findTempNameWinIO = do + let label = if null prefix then "ghc" else prefix + withCWString tmp_dir $ \c_tmp_dir -> + withCWString label $ \c_template -> + withCWString suffix $ \c_suffix -> + with nullPtr $ \c_ptr -> do + res <- c_createUUIDTempFileErrNo c_tmp_dir c_template c_suffix c_ptr + if not res + then do errno <- getErrno + ioError (errnoToIOError loc errno Nothing (Just tmp_dir)) + else do c_p <- peek c_ptr + filename <- peekCWString c_p + free c_p + let flags = fromIntegral mode .&. o_EXCL + handleResultsWinIO filename (flags == o_EXCL) + + findTempNamePosix = do + let label = if null prefix then "ghc" else prefix + withCWString tmp_dir $ \c_tmp_dir -> + withCWString label $ \c_template -> + withCWString suffix $ \c_suffix -> + allocaBytes (sizeOf (undefined :: CWchar) * 260) $ \c_str -> do + res <- c_getTempFileNameErrorNo c_tmp_dir c_template c_suffix 0 + c_str + if not res + then do errno <- getErrno + ioError (errnoToIOError loc errno Nothing (Just tmp_dir)) + else do filename <- peekCWString c_str + handleResultsPosix filename + + handleResultsPosix filename = do + let oflags1 = rw_flags .|. o_EXCL + binary_flags + | binary = o_BINARY + | otherwise = 0 + oflags = oflags1 .|. binary_flags + fd <- withFilePath filename $ \ f -> c_open f oflags mode + case fd < 0 of + True -> do errno <- getErrno + ioError (errnoToIOError loc errno Nothing (Just tmp_dir)) + False -> + do (fD,fd_type) <- FD.mkFD fd ReadWriteMode Nothing{-no stat-} + False{-is_socket-} + True{-is_nonblock-} + + enc <- getLocaleEncoding + h <- POSIX.mkHandleFromFD fD fd_type filename ReadWriteMode + False{-set non-block-} (Just enc) + + return (filename, h) + + handleResultsWinIO filename excl = do + (hwnd, hwnd_type) <- openFileAsTemp filename True excl + mb_codec <- if binary then return Nothing else fmap Just getLocaleEncoding + + -- then use it to make a Handle + h <- mkHandleFromHANDLE hwnd hwnd_type filename ReadWriteMode mb_codec + `onException` IODevice.close hwnd + return (filename, h) + +foreign import ccall "getTempFileNameErrorNo" c_getTempFileNameErrorNo + :: CWString -> CWString -> CWString -> CUInt -> Ptr CWchar -> IO Bool + +foreign import ccall "__createUUIDTempFileErrNo" c_createUUIDTempFileErrNo + :: CWString -> CWString -> CWString -> Ptr CWString -> IO Bool + +pathSeparator :: String -> Bool +pathSeparator template = any (\x-> x == '/' || x == '\\') template + +output_flags = std_flags +#else /* else mingw32_HOST_OS */ + findTempName = do + rs <- rand_string + let filename = prefix ++ rs ++ suffix + filepath = tmp_dir `combine` filename + r <- openNewFile filepath binary mode + case r of + FileExists -> findTempName + OpenNewError errno -> ioError (errnoToIOError loc errno Nothing (Just tmp_dir)) + NewFileCreated fd -> do + (fD,fd_type) <- FD.mkFD fd ReadWriteMode Nothing{-no stat-} + False{-is_socket-} + True{-is_nonblock-} + + enc <- getLocaleEncoding + h <- POSIX.mkHandleFromFD fD fd_type filepath ReadWriteMode False{-set non-block-} (Just enc) + + return (filepath, h) + + where + -- XXX bits copied from System.FilePath, since that's not available here + combine a b + | null b = a + | null a = b + | pathSeparator [last a] = a ++ b + | otherwise = a ++ [pathSeparatorChar] ++ b + +tempCounter :: IORef Int +tempCounter = unsafePerformIO $ newIORef 0 +{-# NOINLINE tempCounter #-} + +-- build large digit-alike number +rand_string :: IO String +rand_string = do + r1 <- c_getpid + (r2, _) <- atomicModifyIORef'_ tempCounter (+1) + return $ show r1 ++ "-" ++ show r2 + +data OpenNewFileResult + = NewFileCreated CInt + | FileExists + | OpenNewError Errno + +openNewFile :: FilePath -> Bool -> CMode -> IO OpenNewFileResult +openNewFile filepath binary mode = do + let oflags1 = rw_flags .|. o_EXCL + + binary_flags + | binary = o_BINARY + | otherwise = 0 + + oflags = oflags1 .|. binary_flags + fd <- withFilePath filepath $ \ f -> + c_open f oflags mode + if fd < 0 + then do + errno <- getErrno + case errno of + _ | errno == eEXIST -> return FileExists + _ -> return (OpenNewError errno) + else return (NewFileCreated fd) + +-- XXX Should use filepath library +pathSeparatorChar :: Char +pathSeparatorChar = '/' + +pathSeparator :: String -> Bool +pathSeparator template = pathSeparatorChar `elem` template + +output_flags = std_flags .|. o_CREAT +#endif /* mingw32_HOST_OS */ + +-- XXX Copied from GHC.Handle +std_flags, output_flags, rw_flags :: CInt +std_flags = o_NONBLOCK .|. o_NOCTTY +rw_flags = output_flags .|. o_RDWR -- $locking -- Implementations should enforce as far as possible, at least locally to the ===================================== libraries/base/src/Text/Printf.hs ===================================== @@ -99,7 +99,7 @@ import GHC.Internal.Data.List (stripPrefix) import GHC.Internal.Word import GHC.Internal.Numeric import GHC.Internal.Numeric.Natural -import GHC.Internal.System.IO +import System.IO -- $setup -- >>> import Prelude ===================================== libraries/ghc-internal/src/GHC/Internal/System/IO.hs ===================================== @@ -1,6 +1,4 @@ {-# LANGUAGE Trustworthy #-} -{-# LANGUAGE CPP, NoImplicitPrelude, CApiFFI #-} -{-# OPTIONS_GHC -Wno-x-partial #-} ----------------------------------------------------------------------------- -- | @@ -16,286 +14,13 @@ -- ----------------------------------------------------------------------------- -module GHC.Internal.System.IO ( - -- * The IO monad +module GHC.Internal.System.IO (putStrLn, print) where - IO, - - -- * Files and handles - - FilePath, - - Handle, -- abstract, instance of: Eq, Show. - - -- | GHC note: a 'Handle' will be automatically closed when the garbage - -- collector detects that it has become unreferenced by the program. - -- However, relying on this behaviour is not generally recommended: - -- the garbage collector is unpredictable. If possible, use - -- an explicit 'hClose' to close 'Handle's when they are no longer - -- required. GHC does not currently attempt to free up file - -- descriptors when they have run out, it is your responsibility to - -- ensure that this doesn't happen. - - -- ** Standard handles - - -- | Three handles are allocated during program initialisation, - -- and are initially open. - - stdin, stdout, stderr, - - -- * Opening and closing files - - -- ** Opening files - - withFile, - openFile, - IOMode(ReadMode,WriteMode,AppendMode,ReadWriteMode), - - -- ** Closing files - - hClose, - - -- ** Special cases - - -- | These functions are also exported by the "Prelude". - - readFile, - readFile', - writeFile, - appendFile, - - -- * Operations on handles - - -- ** Determining and changing the size of a file - - hFileSize, - hSetFileSize, - - -- ** Detecting the end of input - - hIsEOF, - isEOF, - - -- ** Buffering operations - - BufferMode(NoBuffering,LineBuffering,BlockBuffering), - hSetBuffering, - hGetBuffering, - hFlush, - - -- ** Repositioning handles - - hGetPosn, - hSetPosn, - HandlePosn, -- abstract, instance of: Eq, Show. - - hSeek, - SeekMode(AbsoluteSeek,RelativeSeek,SeekFromEnd), - hTell, - - -- ** Handle properties - - hIsOpen, hIsClosed, - hIsReadable, hIsWritable, - hIsSeekable, - - -- ** Terminal operations (not portable: GHC only) - - hIsTerminalDevice, - - hSetEcho, - hGetEcho, - - -- ** Showing handle state (not portable: GHC only) - - hShow, - - -- * Text input and output - - -- ** Text input - - hWaitForInput, - hReady, - hGetChar, - hGetLine, - hLookAhead, - hGetContents, - hGetContents', - - -- ** Text output - - hPutChar, - hPutStr, - hPutStrLn, - hPrint, - - -- ** Special cases for standard input and output - - -- | These functions are also exported by the "Prelude". - - interact, - putChar, - putStr, - putStrLn, - print, - getChar, - getLine, - getContents, - getContents', - readIO, - readLn, - - -- * Binary input and output - - withBinaryFile, - openBinaryFile, - hSetBinaryMode, - hPutBuf, - hGetBuf, - hGetBufSome, - hPutBufNonBlocking, - hGetBufNonBlocking, - - -- * Temporary files - - openTempFile, - openBinaryTempFile, - openTempFileWithDefaultPermissions, - openBinaryTempFileWithDefaultPermissions, - - -- * Unicode encoding\/decoding - - -- | A text-mode 'Handle' has an associated 'TextEncoding', which - -- is used to decode bytes into Unicode characters when reading, - -- and encode Unicode characters into bytes when writing. - -- - -- The default 'TextEncoding' is the same as the default encoding - -- on your system, which is also available as 'localeEncoding'. - -- (GHC note: on Windows, we currently do not support double-byte - -- encodings; if the console\'s code page is unsupported, then - -- 'localeEncoding' will be 'latin1'.) - -- - -- Encoding and decoding errors are always detected and reported, - -- except during lazy I/O ('hGetContents', 'getContents', and - -- 'readFile'), where a decoding error merely results in - -- termination of the character stream, as with other I/O errors. - - hSetEncoding, - hGetEncoding, - - -- ** Unicode encodings - TextEncoding, - latin1, - utf8, utf8_bom, - utf16, utf16le, utf16be, - utf32, utf32le, utf32be, - localeEncoding, - char8, - mkTextEncoding, - - -- * Newline conversion - - -- | In Haskell, a newline is always represented by the character - -- @\'\\n\'@. However, in files and external character streams, a - -- newline may be represented by another character sequence, such - -- as @\'\\r\\n\'@. - -- - -- A text-mode 'Handle' has an associated 'NewlineMode' that - -- specifies how to translate newline characters. The - -- 'NewlineMode' specifies the input and output translation - -- separately, so that for instance you can translate @\'\\r\\n\'@ - -- to @\'\\n\'@ on input, but leave newlines as @\'\\n\'@ on output. - -- - -- The default 'NewlineMode' for a 'Handle' is - -- 'nativeNewlineMode', which does no translation on Unix systems, - -- but translates @\'\\r\\n\'@ to @\'\\n\'@ and back on Windows. - -- - -- Binary-mode 'Handle's do no newline translation at all. - -- - hSetNewlineMode, - hGetNewlineMode, - Newline(..), nativeNewline, - NewlineMode(..), - noNewlineTranslation, universalNewlineMode, nativeNewlineMode, - ) where - -import GHC.Internal.Control.Exception.Base - -import GHC.Internal.Data.Bits -import GHC.Internal.Data.Maybe -import GHC.Internal.Foreign.C.Error -#if defined(mingw32_HOST_OS) -import GHC.Internal.Foreign.C.String -import GHC.Internal.Foreign.Ptr -import GHC.Internal.Foreign.Marshal.Alloc -import GHC.Internal.Foreign.Marshal.Utils (with) -import GHC.Internal.Foreign.Storable -import GHC.Internal.IO.SubSystem -import GHC.Internal.IO.Windows.Handle (openFileAsTemp) -import GHC.Internal.IO.Handle.Windows (mkHandleFromHANDLE) -import GHC.Internal.IO.Device as IODevice -import GHC.Internal.Real (fromIntegral) -#endif -import GHC.Internal.Foreign.C.Types -import GHC.Internal.System.Posix.Internals -import GHC.Internal.System.Posix.Types - -import GHC.Internal.Base -import GHC.Internal.List -#if !defined(mingw32_HOST_OS) -import GHC.Internal.IORef -#endif -import GHC.Internal.Num -import GHC.Internal.IO hiding ( bracket, onException ) -import GHC.Internal.IO.IOMode -import qualified GHC.Internal.IO.FD as FD -import GHC.Internal.IO.Handle -import qualified GHC.Internal.IO.Handle.FD as POSIX -import GHC.Internal.IO.Handle.Text ( hGetBufSome, hPutStrLn ) -import GHC.Internal.IO.Exception ( userError ) -import GHC.Internal.IO.Encoding -import GHC.Internal.Text.Read -import GHC.Internal.IO.StdHandles -import GHC.Internal.Show ------------------------------------------------------------------------------ --- Standard IO - --- | Write a character to the standard output device --- --- 'putChar' is implemented as @'hPutChar' 'stdout'@. --- --- This operation may fail with the same errors as 'hPutChar'. --- --- ==== __Examples__ --- --- Note that the following do not put a newline. --- --- >>> putChar 'x' --- x --- --- >>> putChar '\0042' --- * -putChar :: Char -> IO () -putChar c = hPutChar stdout c - --- | Write a string to the standard output device --- --- 'putStr' is implemented as @'hPutStr' 'stdout'@. --- --- This operation may fail with the same errors, and has the same issues with concurrency, as 'hPutStr'! --- --- ==== __Examples__ --- --- Note that the following do not put a newline. --- --- >>> putStr "Hello, World!" --- Hello, World! --- --- >>> putStr "\0052\0042\0050" --- 4*2 --- -putStr :: String -> IO () -putStr s = hPutStr stdout s +import GHC.Internal.Base (String) +import GHC.Internal.IO (IO) +import GHC.Internal.IO.Handle.Text (hPutStrLn) +import GHC.Internal.IO.StdHandles (stdout) +import GHC.Internal.Show (Show, show) -- | The same as 'putStr', but adds a newline character. -- @@ -332,485 +57,3 @@ putStrLn s = hPutStrLn stdout s -- [(0,1),(1,2),(2,4),(3,8),(4,16),(5,32),(6,64),(7,128),(8,256)] print :: Show a => a -> IO () print x = putStrLn (show x) - --- | Read a single character from the standard input device. --- --- 'getChar' is implemented as @'hGetChar' 'stdin'@. --- --- This operation may fail with the same errors as 'hGetChar'. --- --- ==== __Examples__ --- --- >>> getChar --- a'a' --- --- >>> getChar --- > --- '\n' -getChar :: IO Char -getChar = hGetChar stdin - --- | Read a line from the standard input device. --- --- 'getLine' is implemented as @'hGetLine' 'stdin'@. --- --- This operation may fail with the same errors as 'hGetLine'. --- --- ==== __Examples__ --- --- >>> getLine --- > Hello World! --- "Hello World!" --- --- >>> getLine --- > --- "" -getLine :: IO String -getLine = hGetLine stdin - --- | The 'getContents' operation returns all user input as a single string, --- which is read lazily as it is needed. --- --- 'getContents' is implemented as @'hGetContents' 'stdin'@. --- --- This operation may fail with the same errors as 'hGetContents'. --- --- ==== __Examples__ --- --- >>> getContents >>= putStr --- > aaabbbccc :D --- aaabbbccc :D --- > I hope you have a great day --- I hope you have a great day --- > ^D --- --- >>> getContents >>= print . length --- > abc --- > <3 --- > def ^D --- 11 -getContents :: IO String -getContents = hGetContents stdin - --- | The 'getContents'' operation returns all user input as a single string, --- which is fully read before being returned --- --- 'getContents'' is implemented as @'hGetContents'' 'stdin'@. --- --- This operation may fail with the same errors as 'hGetContents''. --- --- ==== __Examples__ --- --- >>> getContents' >>= putStr --- > aaabbbccc :D --- > I hope you have a great day --- aaabbbccc :D --- I hope you have a great day --- --- >>> getContents' >>= print . length --- > abc --- > <3 --- > def ^D --- 11 --- --- @since base-4.15.0.0 -getContents' :: IO String -getContents' = hGetContents' stdin - --- | @'interact' f@ takes the entire input from 'stdin' and applies @f@ to it. --- The resulting string is written to the 'stdout' device. --- --- Note that this operation is lazy, which allows to produce output --- even before all input has been consumed. --- --- This operation may fail with the same errors as 'getContents' and 'putStr'. --- --- If it doesn't produce output the buffering settings may not be --- correct, use ^D (ctrl+D) to close stdin which forces --- the buffer to be consumed. --- --- You may wish to set the buffering style appropriate to your program's --- needs before using this function, for example: --- --- @ --- main :: IO () --- main = do --- hSetBuffering stdin LineBuffering --- hSetBuffering stdout NoBuffering --- interact (concatMap (\str -> str ++ str) . L.lines) --- @ --- --- ==== __Examples__ --- --- >>> interact (\str -> str ++ str) --- > hi :) --- hi :) --- > ^D --- hi :) --- --- >>> interact (const ":D") --- :D --- --- >>> interact (show . words) --- > hello world! --- > I hope you have a great day --- > ^D --- ["hello","world!","I","hope","you","have","a","great","day"] -interact :: (String -> String) -> IO () -interact f = do s <- getContents - putStr (f s) - --- | The 'readFile' function reads a file and --- returns the contents of the file as a string. --- --- The file is read lazily, on demand, as with 'getContents'. --- --- This operation may fail with the same errors as 'hGetContents' and 'openFile'. --- --- ==== __Examples__ --- --- >>> readFile "~/hello_world" --- "Greetings!" --- --- >>> take 5 <$> readFile "/dev/zero" --- "\NUL\NUL\NUL\NUL\NUL" -readFile :: FilePath -> IO String -readFile name = openFile name ReadMode >>= hGetContents - --- | The 'readFile'' function reads a file and --- returns the contents of the file as a string. --- --- This is identical to 'readFile', but the file is fully read before being returned, --- as with 'getContents''. --- --- @since base-4.15.0.0 -readFile' :: FilePath -> IO String --- There's a bit of overkill here—both withFile and --- hGetContents' will close the file in the end. -readFile' name = withFile name ReadMode hGetContents' - --- | The computation @'writeFile' file str@ function writes the string @str@, --- to the file @file@. --- --- This operation may fail with the same errors as 'hPutStr' and 'withFile'. --- --- ==== __Examples__ --- --- >>> writeFile "hello" "world" >> readFile "hello" --- "world" --- --- >>> writeFile "~/" "D:" --- *** Exception: ~/: withFile: inappropriate type (Is a directory) -writeFile :: FilePath -> String -> IO () -writeFile f txt = withFile f WriteMode (\ hdl -> hPutStr hdl txt) - --- | The computation @'appendFile' file str@ function appends the string @str@, --- to the file @file@. --- --- Note that 'writeFile' and 'appendFile' write a literal string --- to a file. To write a value of any printable type, as with 'print', --- use the 'show' function to convert the value to a string first. --- --- This operation may fail with the same errors as 'hPutStr' and 'withFile'. --- --- ==== __Examples__ --- --- The following example could be more efficently written by acquiring a handle --- instead with 'openFile' and using the computations capable of writing to handles --- such as 'hPutStr'. --- --- >>> let fn = "hello_world" --- >>> in writeFile fn "hello" >> appendFile fn " world!" >> (readFile fn >>= putStrLn) --- "hello world!" --- --- >>> let fn = "foo"; output = readFile' fn >>= putStrLn --- >>> in output >> appendFile fn (show [1,2,3]) >> output --- this is what's in the file --- this is what's in the file[1,2,3] -appendFile :: FilePath -> String -> IO () -appendFile f txt = withFile f AppendMode (\ hdl -> hPutStr hdl txt) - --- | The 'readLn' function combines 'getLine' and 'readIO'. --- --- This operation may fail with the same errors as 'getLine' and 'readIO'. --- --- ==== __Examples__ --- --- >>> fmap (+ 5) readLn --- > 25 --- 30 --- --- >>> readLn :: IO String --- > this is not a string literal --- *** Exception: user error (Prelude.readIO: no parse) -readLn :: Read a => IO a -readLn = getLine >>= readIO - --- | The 'readIO' function is similar to 'read' except that it signals --- parse failure to the 'IO' monad instead of terminating the program. --- --- This operation may fail with: --- --- * 'GHC.Internal.System.IO.Error.isUserError' if there is no unambiguous parse. --- --- ==== __Examples__ --- --- >>> fmap (+ 1) (readIO "1") --- 2 --- --- >>> readIO "not quite ()" :: IO () --- *** Exception: user error (Prelude.readIO: no parse) -readIO :: Read a => String -> IO a -readIO s = case (do { (x,t) <- reads s ; - ("","") <- lex t ; - return x }) of - [x] -> return x - [] -> ioError (userError "Prelude.readIO: no parse") - _ -> ioError (userError "Prelude.readIO: ambiguous parse") - --- | The encoding of the current locale. --- --- This is the initial locale encoding: if it has been subsequently changed by --- 'GHC.Internal.IO.Encoding.setLocaleEncoding' this value will not reflect that change. -localeEncoding :: TextEncoding -localeEncoding = initLocaleEncoding - --- | Computation 'hReady' @hdl@ indicates whether at least one item is --- available for input from handle @hdl@. --- --- This operation may fail with: --- --- * 'GHC.Internal.System.IO.Error.isEOFError' if the end of file has been reached. -hReady :: Handle -> IO Bool -hReady h = hWaitForInput h 0 - --- | Computation 'hPrint' @hdl t@ writes the string representation of @t@ --- given by the 'show' function to the file or channel managed by @hdl@ --- and appends a newline. --- --- This operation may fail with the same errors as 'hPutStrLn' --- --- ==== __Examples__ --- --- >>> hPrint stdout [1,2,3] --- [1,2,3] --- --- >>> hPrint stdin [4,5,6] --- *** Exception: <stdin>: hPutStr: illegal operation (handle is not open for writing) -hPrint :: Show a => Handle -> a -> IO () -hPrint hdl = hPutStrLn hdl . show - --- | The function creates a temporary file in ReadWrite mode. --- The created file isn\'t deleted automatically, so you need to delete it manually. --- --- The file is created with permissions such that only the current --- user can read\/write it. --- --- With some exceptions (see below), the file will be created securely --- in the sense that an attacker should not be able to cause --- openTempFile to overwrite another file on the filesystem using your --- credentials, by putting symbolic links (on Unix) in the place where --- the temporary file is to be created. On Unix the @O_CREAT@ and --- @O_EXCL@ flags are used to prevent this attack, but note that --- @O_EXCL@ is sometimes not supported on NFS filesystems, so if you --- rely on this behaviour it is best to use local filesystems only. -openTempFile :: FilePath -- ^ Directory in which to create the file - -> String -- ^ File name template. If the template is \"foo.ext\" then - -- the created file will be \"fooXXX.ext\" where XXX is some - -- random number. Note that this should not contain any path - -- separator characters. On Windows, the template prefix may - -- be truncated to 3 chars, e.g. \"foobar.ext\" will be - -- \"fooXXX.ext\". - -> IO (FilePath, Handle) -openTempFile tmp_dir template - = openTempFile' "openTempFile" tmp_dir template False 0o600 - --- | Like 'openTempFile', but opens the file in binary mode. See 'openBinaryFile' for more comments. -openBinaryTempFile :: FilePath -> String -> IO (FilePath, Handle) -openBinaryTempFile tmp_dir template - = openTempFile' "openBinaryTempFile" tmp_dir template True 0o600 - --- | Like 'openTempFile', but uses the default file permissions -openTempFileWithDefaultPermissions :: FilePath -> String - -> IO (FilePath, Handle) -openTempFileWithDefaultPermissions tmp_dir template - = openTempFile' "openTempFileWithDefaultPermissions" tmp_dir template False 0o666 - --- | Like 'openBinaryTempFile', but uses the default file permissions -openBinaryTempFileWithDefaultPermissions :: FilePath -> String - -> IO (FilePath, Handle) -openBinaryTempFileWithDefaultPermissions tmp_dir template - = openTempFile' "openBinaryTempFileWithDefaultPermissions" tmp_dir template True 0o666 - -openTempFile' :: String -> FilePath -> String -> Bool -> CMode - -> IO (FilePath, Handle) -openTempFile' loc tmp_dir template binary mode - | pathSeparator template - = failIO $ "openTempFile': Template string must not contain path separator characters: "++template - | otherwise = findTempName - where - -- We split off the last extension, so we can use .foo.ext files - -- for temporary files (hidden on Unix OSes). Unfortunately we're - -- below filepath in the hierarchy here. - (prefix, suffix) = - case break (== '.') $ reverse template of - -- First case: template contains no '.'s. Just re-reverse it. - (rev_suffix, "") -> (reverse rev_suffix, "") - -- Second case: template contains at least one '.'. Strip the - -- dot from the prefix and prepend it to the suffix (if we don't - -- do this, the unique number will get added after the '.' and - -- thus be part of the extension, which is wrong.) - (rev_suffix, '.':rest) -> (reverse rest, '.':reverse rev_suffix) - -- Otherwise, something is wrong, because (break (== '.')) should - -- always return a pair with either the empty string or a string - -- beginning with '.' as the second component. - _ -> errorWithoutStackTrace "bug in GHC.Internal.System.IO.openTempFile" -#if defined(mingw32_HOST_OS) - findTempName = findTempNamePosix <!> findTempNameWinIO - - findTempNameWinIO = do - let label = if null prefix then "ghc" else prefix - withCWString tmp_dir $ \c_tmp_dir -> - withCWString label $ \c_template -> - withCWString suffix $ \c_suffix -> - with nullPtr $ \c_ptr -> do - res <- c_createUUIDTempFileErrNo c_tmp_dir c_template c_suffix c_ptr - if not res - then do errno <- getErrno - ioError (errnoToIOError loc errno Nothing (Just tmp_dir)) - else do c_p <- peek c_ptr - filename <- peekCWString c_p - free c_p - let flags = fromIntegral mode .&. o_EXCL - handleResultsWinIO filename (flags == o_EXCL) - - findTempNamePosix = do - let label = if null prefix then "ghc" else prefix - withCWString tmp_dir $ \c_tmp_dir -> - withCWString label $ \c_template -> - withCWString suffix $ \c_suffix -> - allocaBytes (sizeOf (undefined :: CWchar) * 260) $ \c_str -> do - res <- c_getTempFileNameErrorNo c_tmp_dir c_template c_suffix 0 - c_str - if not res - then do errno <- getErrno - ioError (errnoToIOError loc errno Nothing (Just tmp_dir)) - else do filename <- peekCWString c_str - handleResultsPosix filename - - handleResultsPosix filename = do - let oflags1 = rw_flags .|. o_EXCL - binary_flags - | binary = o_BINARY - | otherwise = 0 - oflags = oflags1 .|. binary_flags - fd <- withFilePath filename $ \ f -> c_open f oflags mode - case fd < 0 of - True -> do errno <- getErrno - ioError (errnoToIOError loc errno Nothing (Just tmp_dir)) - False -> - do (fD,fd_type) <- FD.mkFD fd ReadWriteMode Nothing{-no stat-} - False{-is_socket-} - True{-is_nonblock-} - - enc <- getLocaleEncoding - h <- POSIX.mkHandleFromFD fD fd_type filename ReadWriteMode - False{-set non-block-} (Just enc) - - return (filename, h) - - handleResultsWinIO filename excl = do - (hwnd, hwnd_type) <- openFileAsTemp filename True excl - mb_codec <- if binary then return Nothing else fmap Just getLocaleEncoding - - -- then use it to make a Handle - h <- mkHandleFromHANDLE hwnd hwnd_type filename ReadWriteMode mb_codec - `onException` IODevice.close hwnd - return (filename, h) - -foreign import ccall "getTempFileNameErrorNo" c_getTempFileNameErrorNo - :: CWString -> CWString -> CWString -> CUInt -> Ptr CWchar -> IO Bool - -foreign import ccall "__createUUIDTempFileErrNo" c_createUUIDTempFileErrNo - :: CWString -> CWString -> CWString -> Ptr CWString -> IO Bool - -pathSeparator :: String -> Bool -pathSeparator template = any (\x-> x == '/' || x == '\\') template - -output_flags = std_flags -#else /* else mingw32_HOST_OS */ - findTempName = do - rs <- rand_string - let filename = prefix ++ rs ++ suffix - filepath = tmp_dir `combine` filename - r <- openNewFile filepath binary mode - case r of - FileExists -> findTempName - OpenNewError errno -> ioError (errnoToIOError loc errno Nothing (Just tmp_dir)) - NewFileCreated fd -> do - (fD,fd_type) <- FD.mkFD fd ReadWriteMode Nothing{-no stat-} - False{-is_socket-} - True{-is_nonblock-} - - enc <- getLocaleEncoding - h <- POSIX.mkHandleFromFD fD fd_type filepath ReadWriteMode False{-set non-block-} (Just enc) - - return (filepath, h) - - where - -- XXX bits copied from System.FilePath, since that's not available here - combine a b - | null b = a - | null a = b - | pathSeparator [last a] = a ++ b - | otherwise = a ++ [pathSeparatorChar] ++ b - -tempCounter :: IORef Int -tempCounter = unsafePerformIO $ newIORef 0 -{-# NOINLINE tempCounter #-} - --- build large digit-alike number -rand_string :: IO String -rand_string = do - r1 <- c_getpid - (r2, _) <- atomicModifyIORef'_ tempCounter (+1) - return $ show r1 ++ "-" ++ show r2 - -data OpenNewFileResult - = NewFileCreated CInt - | FileExists - | OpenNewError Errno - -openNewFile :: FilePath -> Bool -> CMode -> IO OpenNewFileResult -openNewFile filepath binary mode = do - let oflags1 = rw_flags .|. o_EXCL - - binary_flags - | binary = o_BINARY - | otherwise = 0 - - oflags = oflags1 .|. binary_flags - fd <- withFilePath filepath $ \ f -> - c_open f oflags mode - if fd < 0 - then do - errno <- getErrno - case errno of - _ | errno == eEXIST -> return FileExists - _ -> return (OpenNewError errno) - else return (NewFileCreated fd) - --- XXX Should use filepath library -pathSeparatorChar :: Char -pathSeparatorChar = '/' - -pathSeparator :: String -> Bool -pathSeparator template = pathSeparatorChar `elem` template - -output_flags = std_flags .|. o_CREAT -#endif /* mingw32_HOST_OS */ - --- XXX Copied from GHC.Handle -std_flags, output_flags, rw_flags :: CInt -std_flags = o_NONBLOCK .|. o_NOCTTY -rw_flags = output_flags .|. o_RDWR ===================================== testsuite/tests/interface-stability/base-exports.stdout ===================================== @@ -7848,6 +7848,7 @@ module GHC.IO.Handle where hGetEcho :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool hGetEncoding :: Handle -> GHC.Internal.Types.IO (GHC.Internal.Maybe.Maybe GHC.Internal.IO.Encoding.Types.TextEncoding) hGetLine :: Handle -> GHC.Internal.Types.IO GHC.Internal.Base.String + hGetNewlineMode :: Handle -> GHC.Internal.Types.IO NewlineMode hGetPosn :: Handle -> GHC.Internal.Types.IO HandlePosn hIsClosed :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool hIsEOF :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool @@ -9883,7 +9884,7 @@ module System.Exit where exitWith :: forall a. ExitCode -> GHC.Internal.Types.IO a module System.IO where - -- Safety: Safe + -- Safety: Trustworthy type BufferMode :: * data BufferMode = NoBuffering | LineBuffering | BlockBuffering (GHC.Internal.Maybe.Maybe GHC.Internal.Types.Int) type FilePath :: * ===================================== testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs ===================================== @@ -7820,6 +7820,7 @@ module GHC.IO.Handle where hGetEcho :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool hGetEncoding :: Handle -> GHC.Internal.Types.IO (GHC.Internal.Maybe.Maybe GHC.Internal.IO.Encoding.Types.TextEncoding) hGetLine :: Handle -> GHC.Internal.Types.IO GHC.Internal.Base.String + hGetNewlineMode :: Handle -> GHC.Internal.Types.IO NewlineMode hGetPosn :: Handle -> GHC.Internal.Types.IO HandlePosn hIsClosed :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool hIsEOF :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool @@ -9921,7 +9922,7 @@ module System.Exit where exitWith :: forall a. ExitCode -> GHC.Internal.Types.IO a module System.IO where - -- Safety: Safe + -- Safety: Trustworthy type BufferMode :: * data BufferMode = NoBuffering | LineBuffering | BlockBuffering (GHC.Internal.Maybe.Maybe GHC.Internal.Types.Int) type FilePath :: * ===================================== testsuite/tests/interface-stability/base-exports.stdout-mingw32 ===================================== @@ -8012,6 +8012,7 @@ module GHC.IO.Handle where hGetEcho :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool hGetEncoding :: Handle -> GHC.Internal.Types.IO (GHC.Internal.Maybe.Maybe GHC.Internal.IO.Encoding.Types.TextEncoding) hGetLine :: Handle -> GHC.Internal.Types.IO GHC.Internal.Base.String + hGetNewlineMode :: Handle -> GHC.Internal.Types.IO NewlineMode hGetPosn :: Handle -> GHC.Internal.Types.IO HandlePosn hIsClosed :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool hIsEOF :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool @@ -10163,7 +10164,7 @@ module System.Exit where exitWith :: forall a. ExitCode -> GHC.Internal.Types.IO a module System.IO where - -- Safety: Safe + -- Safety: Trustworthy type BufferMode :: * data BufferMode = NoBuffering | LineBuffering | BlockBuffering (GHC.Internal.Maybe.Maybe GHC.Internal.Types.Int) type FilePath :: * ===================================== testsuite/tests/interface-stability/base-exports.stdout-ws-32 ===================================== @@ -7848,6 +7848,7 @@ module GHC.IO.Handle where hGetEcho :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool hGetEncoding :: Handle -> GHC.Internal.Types.IO (GHC.Internal.Maybe.Maybe GHC.Internal.IO.Encoding.Types.TextEncoding) hGetLine :: Handle -> GHC.Internal.Types.IO GHC.Internal.Base.String + hGetNewlineMode :: Handle -> GHC.Internal.Types.IO NewlineMode hGetPosn :: Handle -> GHC.Internal.Types.IO HandlePosn hIsClosed :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool hIsEOF :: Handle -> GHC.Internal.Types.IO GHC.Internal.Types.Bool @@ -9883,7 +9884,7 @@ module System.Exit where exitWith :: forall a. ExitCode -> GHC.Internal.Types.IO a module System.IO where - -- Safety: Safe + -- Safety: Trustworthy type BufferMode :: * data BufferMode = NoBuffering | LineBuffering | BlockBuffering (GHC.Internal.Maybe.Maybe GHC.Internal.Types.Int) type FilePath :: * View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/fca4d682b38dbff23fca8b200df64f6… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/fca4d682b38dbff23fca8b200df64f6… You're receiving this email because of your account on gitlab.haskell.org.

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