June 2026 - ghc-commits

[Git][ghc/ghc][wip/reduce-type-in-stg] Fix two remaining issues
by Jaro Reinders (＠jaro) 06 Jun '26

06 Jun '26

Jaro Reinders pushed to branch wip/reduce-type-in-stg at Glasgow Haskell Compiler / GHC Commits: 38a30a91 by Jaro Reinders at 2026-06-06T13:01:19+02:00 Fix two remaining issues - - - - - 2 changed files: - compiler/GHC/Stg/Syntax.hs - compiler/GHC/StgToJS/FFI.hs Changes: ===================================== compiler/GHC/Stg/Syntax.hs ===================================== @@ -993,8 +993,7 @@ pprStgOp :: StgOp -> SDoc pprStgOp (StgPrimOp op) = ppr op pprStgOp (StgPrimCallOp op _)= ppr op pprStgOp (StgFCallOp op _ _) = ppr op --- TODO: how do we want to pretty print this? -pprStgOp (StgTagToEnumOp tyc) = text "TagToEnumOp" <+> ppr tyc +pprStgOp (StgTagToEnumOp _tyc) = text "tagToEnum#" instance Outputable StgOp where ppr = pprStgOp ===================================== compiler/GHC/StgToJS/FFI.hs ===================================== @@ -184,7 +184,7 @@ genForeignCall _ctx (CCall (CCallSpec (StaticTarget ext tgt ForeignFunction) JavaScriptCallConv PlayRisky)) - _t + _ki [obj] args | tgt == hdBuildObjectStr @@ -195,12 +195,9 @@ genForeignCall _ctx , ExprInline ) -genForeignCall ctx (CCall (CCallSpec ccTarget cconv safety)) k tgt args = do - -- TODO: the 'unknown' here was originally the type constructor shown by 'showType' - -- but now we don't have access to that any more. I'm not sure if this is necessary - -- for the JS back end. - emitForeign (ctxSrcSpan ctx) lbl safety cconv (map showArgType args) unknown - (,exprResult) <$> parseFFIPattern catchExcep async isJsCc (unpackFS lbl) k tgt' args +genForeignCall ctx (CCall (CCallSpec ccTarget cconv safety)) ki tgt args = do + emitForeign (ctxSrcSpan ctx) lbl safety cconv (map showArgType args) (showType (getStgKind ki)) + (,exprResult) <$> parseFFIPattern catchExcep async isJsCc (unpackFS lbl) ki tgt' args where isJsCc = cconv == JavaScriptCallConv View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/38a30a911b4d52665e5d9c782e41049… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/38a30a911b4d52665e5d9c782e41049… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/romes/hadrian-cross-stage2-rebase_SVEN_FINAL] 8 commits: hadrian: Build stage 2 cross compilers
by Sven Tennie (＠supersven) 06 Jun '26

06 Jun '26

Sven Tennie pushed to branch wip/romes/hadrian-cross-stage2-rebase_SVEN_FINAL at Glasgow Haskell Compiler / GHC Commits: 5f930e38 by Matthew Pickering at 2026-06-06T12:12:59+02:00 hadrian: Build stage 2 cross compilers * Most of hadrian is abstracted over the stage in order to remove the assumption that the target of all stages is the same platform. This allows the RTS to be built for two different targets for example. * Abstracts the bindist creation logic to allow building either normal or cross bindists. Normal bindists use stage 1 libraries and a stage 2 compiler. Cross bindists use stage 2 libararies and a stage 2 compiler. * hadrian: Make binary-dist-dir the default build target. This allows us to have the logic in one place about which libraries/stages to build with cross compilers. Fixes #24192 New hadrian target: * `binary-dist-dir-cross`: Build a cross compiler bindist (compiler = stage 1, libraries = stage 2) This commit also contains various changes to make stage2 compilers feasible. ------------------------- Metric Decrease: LinkableUsage02 ManyAlternatives ManyConstructors MultiComponentModulesRecomp MultiLayerModulesRecomp RecordUpdPerf T10421 T12150 T12227 T12425 T12707 T13035 T13379 T13820 T15703 T16577 T18140 T18282 T18698a T18698b T18923 T1969 T20049 T21839c T3294 T4801 T5030 T5321FD T5321Fun T5631 T5642 T6048 T783 T9020 T9198 T9233 T9630 T9872d T9961 parsing001 Metric Increase: T26989 hard_hole_fits ------------------------- Co-authored-by: Sven Tennie <sven.tennie(a)gmail.com> - - - - - 93f869d0 by Matthew Pickering at 2026-06-06T12:12:59+02:00 ci: Test cross bindists We remove the special logic for testing in-tree cross compilers and instead test cross compiler bindists, like we do for all other platforms. - - - - - fa1fecbd by Matthew Pickering at 2026-06-06T12:12:59+02:00 ci: Introduce CROSS_STAGE variable In preparation for building and testing stage3 bindists we introduce the CROSS_STAGE variable which is used by a CI job to determine what kind of bindist the CI job should produce. At the moment we are only using CROSS_STAGE=2 but in the future we will have some jobs which set CROSS_STAGE=3 to produce native bindists for a target, but produced by a cross compiler, which can be tested on by another CI job on the native platform. CROSS_STAGE=2: Build a normal cross compiler bindist CROSS_STAGE=3: Build a stage 3 bindist, one which is a native compiler and library for the target - - - - - 2bda2311 by Sven Tennie at 2026-06-06T12:12:59+02:00 ci: Increase timeout for emulators Test runs with emulators naturally take longer than on native machines. Generate jobs.yml - - - - - 49e245c8 by Matthew Pickering at 2026-06-06T12:12:59+02:00 ci: Javascript don't set CROSS_EMULATOR There is no CROSS_EMULATOR needed to run javascript binaries, so we don't set the CROSS_EMULATOR to some dummy value. - - - - - 8e9719f8 by Sven Tennie at 2026-06-06T12:12:59+02:00 Javascript skip T23697 See #22355 about how HSC2HS and the Javascript target don't play well together. - - - - - eb51eb4e by Sven Tennie at 2026-06-06T12:12:59+02:00 Mark T24602 as fragile It was skipped before (due to CROSS_EMULATOR being set, which changed for JS), so we don't make things worse by marking it as fragile. - - - - - 92cda9bc by Sven Tennie at 2026-06-06T12:12:59+02:00 Fix T22744 for GHCJS In fact, this test needs Template Haskell, not necessarily an interpreter. - - - - - 61 changed files: - .gitlab/ci.sh - .gitlab/generate-ci/gen_ci.hs - .gitlab/jobs.yaml - + changelog.d/stage2-cross-compilers - configure.ac - distrib/configure.ac.in - hadrian/README.md - hadrian/bindist/config.mk.in - + hadrian/cfg/system.config.host.in - hadrian/cfg/system.config.in - + hadrian/cfg/system.config.target.in - hadrian/hadrian.cabal - hadrian/src/Base.hs - + hadrian/src/BindistConfig.hs - hadrian/src/Builder.hs - hadrian/src/Context.hs - hadrian/src/Expression.hs - hadrian/src/Flavour.hs - hadrian/src/Flavour/Type.hs - hadrian/src/Hadrian/Builder.hs - hadrian/src/Hadrian/Haskell/Hash.hs - hadrian/src/Hadrian/Oracles/TextFile.hs - hadrian/src/Oracles/Flag.hs - hadrian/src/Oracles/Flavour.hs - hadrian/src/Oracles/Setting.hs - hadrian/src/Oracles/TestSettings.hs - hadrian/src/Packages.hs - hadrian/src/Rules.hs - hadrian/src/Rules/BinaryDist.hs - hadrian/src/Rules/CabalReinstall.hs - hadrian/src/Rules/Changelog.hs - hadrian/src/Rules/Compile.hs - hadrian/src/Rules/Documentation.hs - hadrian/src/Rules/Generate.hs - hadrian/src/Rules/Gmp.hs - hadrian/src/Rules/Library.hs - hadrian/src/Rules/Program.hs - hadrian/src/Rules/Register.hs - hadrian/src/Rules/Rts.hs - hadrian/src/Rules/Test.hs - hadrian/src/Settings.hs - hadrian/src/Settings/Builders/Cabal.hs - hadrian/src/Settings/Builders/Common.hs - hadrian/src/Settings/Builders/Configure.hs - hadrian/src/Settings/Builders/DeriveConstants.hs - hadrian/src/Settings/Builders/Ghc.hs - hadrian/src/Settings/Builders/Hsc2Hs.hs - hadrian/src/Settings/Builders/RunTest.hs - hadrian/src/Settings/Builders/SplitSections.hs - hadrian/src/Settings/Default.hs - hadrian/src/Settings/Flavours/GhcInGhci.hs - hadrian/src/Settings/Flavours/Performance.hs - hadrian/src/Settings/Flavours/QuickCross.hs - hadrian/src/Settings/Flavours/Validate.hs - hadrian/src/Settings/Packages.hs - hadrian/src/Settings/Program.hs - hadrian/src/Settings/Warnings.hs - libraries/base/tests/all.T - testsuite/ghc-config/ghc-config.hs - testsuite/tests/javascript/closure/all.T - testsuite/tests/perf/compiler/all.T The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/91fa476ffac1bd3abf44c8bf4b71ab… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/91fa476ffac1bd3abf44c8bf4b71ab… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][ghc-9.12] release 9.12.5: bump base version
by Magnus (＠MangoIV) 06 Jun '26

06 Jun '26

Magnus pushed to branch ghc-9.12 at Glasgow Haskell Compiler / GHC Commits: be19b814 by mangoiv at 2026-06-06T10:18:52+02:00 release 9.12.5: bump base version - - - - - 2 changed files: - libraries/base/base.cabal.in - libraries/base/changelog.md Changes: ===================================== libraries/base/base.cabal.in ===================================== @@ -4,7 +4,7 @@ cabal-version: 3.0 -- Make sure you are editing ghc-experimental.cabal.in, not ghc-experimental.cabal name: base -version: 4.21.2.0 +version: 4.21.3.0 -- NOTE: Don't forget to update ./changelog.md license: BSD-3-Clause ===================================== libraries/base/changelog.md ===================================== @@ -1,5 +1,8 @@ # Changelog for [`base` package](http://hackage.haskell.org/package/base) +## 4.21.2.0 *June 2026* + * System.Info.fullCompilerVersion: add 'since' annotation + ## 4.21.2.0 *March 2026* * Expose `Backtraces` constructor and fields ([CLC proposal #199](https://github.com/haskell/core-libraries-committee/issues/199), [#26049](https://gitlab.haskell.org/ghc/ghc/-/issues/26049)) * Store `StackTrace` and `StackSnapshot` in `Backtraces`, deferring decoding until display View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/be19b814a91e6a6a4baed442a275b4d… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/be19b814a91e6a6a4baed442a275b4d… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/amg/T27329] Mark various language extension flags as deprecated (see #27329)
by Adam Gundry (＠adamgundry) 06 Jun '26

06 Jun '26

Adam Gundry pushed to branch wip/amg/T27329 at Glasgow Haskell Compiler / GHC Commits: a14ec2a3 by Adam Gundry at 2026-06-06T07:15:57+02:00 Mark various language extension flags as deprecated (see #27329) The following language extensions are now deprecated: - AlternativeLayoutRule - AlternativeLayoutRuleTransitional - ParallelArrays - PolymorphicComponents - Rank2Types In addition, the warning `-Walternative-layout-rule-transitional` has been marked as deprecated, as it is emitted only under the deprecated extension `XAlternativeLayoutRuleTransitional`. - - - - - 49 changed files: - + changelog.d/T27329 - compiler/GHC/Driver/Flags.hs - compiler/GHC/Driver/Session.hs - compiler/GHC/Tc/Types/Rank.hs - docs/users_guide/expected-undocumented-flags.txt - docs/users_guide/exts/rank_polymorphism.rst - docs/users_guide/exts/static_pointers.rst - libraries/ghc-internal/ghc-internal.cabal.in - testsuite/tests/backpack/should_compile/T13149.bkp - testsuite/tests/determinism/determ017/A.hs - testsuite/tests/ghci/scripts/T12005.script - testsuite/tests/haddock/perf/Fold.hs - testsuite/tests/indexed-types/should_fail/T7354.hs - testsuite/tests/layout/layout001.stdout - testsuite/tests/layout/layout002.stdout - testsuite/tests/layout/layout003.stdout - testsuite/tests/layout/layout004.stdout - testsuite/tests/layout/layout005.stdout - testsuite/tests/layout/layout006.stdout - testsuite/tests/layout/layout007.stdout - testsuite/tests/layout/layout008.stdout - testsuite/tests/layout/layout009.stdout - testsuite/tests/linear/should_compile/T1735Min.hs - + testsuite/tests/parser/should_compile/T13087.stderr - testsuite/tests/parser/should_fail/T8431.stderr - testsuite/tests/parser/should_fail/readFail038.stderr - testsuite/tests/perf/compiler/T3064.hs - testsuite/tests/polykinds/T7594.hs - testsuite/tests/programs/thurston-modular-arith/Main.hs - testsuite/tests/rts/ipe/IpeStats/Fold.hs - testsuite/tests/simplCore/should_compile/T11562.hs - testsuite/tests/simplCore/should_run/T3591.hs - testsuite/tests/typecheck/should_compile/DeepSubsumption02.hs - testsuite/tests/typecheck/should_compile/T12507.hs - testsuite/tests/typecheck/should_compile/T13951.hs - testsuite/tests/typecheck/should_compile/T18920.hs - testsuite/tests/typecheck/should_compile/T2595.hs - testsuite/tests/typecheck/should_compile/T7541.hs - testsuite/tests/typecheck/should_fail/T6069.stderr - testsuite/tests/typecheck/should_fail/T7368a.hs - testsuite/tests/typecheck/should_run/T1735_Help/Basics.hs - testsuite/tests/typecheck/should_run/T3731-short.hs - testsuite/tests/typecheck/should_run/T3731.hs - testsuite/tests/typecheck/should_run/church.hs - testsuite/tests/typecheck/should_run/tcrun008.hs - testsuite/tests/typecheck/should_run/tcrun017.hs - testsuite/tests/typecheck/should_run/tcrun026.hs - testsuite/tests/typecheck/should_run/tcrun035.hs - testsuite/tests/typecheck/should_run/tcrun036.hs The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/a14ec2a3b462df28886edc1232d3e73… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/a14ec2a3b462df28886edc1232d3e73… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc] Pushed new branch wip/sjakobi/testsuite-bignum-detection
by Simon Jakobi (＠sjakobi2) 06 Jun '26

06 Jun '26

Simon Jakobi pushed new branch wip/sjakobi/testsuite-bignum-detection at Glasgow Haskell Compiler / GHC -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/sjakobi/testsuite-bignum-dete… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc] Pushed new branch wip/sol/haddock-list-indices-bug
by Simon Hengel (＠sol) 06 Jun '26

06 Jun '26

Simon Hengel pushed new branch wip/sol/haddock-list-indices-bug at Glasgow Haskell Compiler / GHC -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/sol/haddock-list-indices-bug You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/amg/castz] 2 commits: Revert "THOU SHALT NOT leak space in substTy"
by Adam Gundry (＠adamgundry) 06 Jun '26

06 Jun '26

Adam Gundry pushed to branch wip/amg/castz at Glasgow Haskell Compiler / GHC Commits: d2fbba48 by Adam Gundry at 2026-06-05T22:32:14+02:00 Revert "THOU SHALT NOT leak space in substTy" This reverts commit bc458a0cada87075d63ab5161231430bc8497671. - - - - - f4032051 by Adam Gundry at 2026-06-05T22:32:23+02:00 Revert "WIP: use CCoercion for CastTy" This reverts commit 66622162564ae06a840ea9ebafe3476e83901e12. - - - - - 29 changed files: - compiler/GHC/Core/Coercion.hs - compiler/GHC/Core/Coercion.hs-boot - compiler/GHC/Core/Coercion/Opt.hs - compiler/GHC/Core/FamInstEnv.hs - compiler/GHC/Core/Lint.hs - compiler/GHC/Core/Opt/Arity.hs - compiler/GHC/Core/Reduction.hs - compiler/GHC/Core/TyCo/FVs.hs - compiler/GHC/Core/TyCo/Rep.hs - compiler/GHC/Core/TyCo/Subst.hs - compiler/GHC/Core/TyCo/Tidy.hs - compiler/GHC/Core/Type.hs - compiler/GHC/Core/Type.hs-boot - compiler/GHC/Core/Unify.hs - compiler/GHC/CoreToIface.hs - compiler/GHC/HsToCore.hs - compiler/GHC/Iface/Rename.hs - compiler/GHC/Iface/Syntax.hs - compiler/GHC/Iface/Type.hs - compiler/GHC/IfaceToCore.hs - compiler/GHC/Tc/Gen/App.hs - compiler/GHC/Tc/Gen/Bind.hs - compiler/GHC/Tc/Gen/HsType.hs - compiler/GHC/Tc/Solver/Equality.hs - compiler/GHC/Tc/Solver/Rewrite.hs - compiler/GHC/Tc/TyCl/Utils.hs - compiler/GHC/Tc/Utils/Instantiate.hs - compiler/GHC/Tc/Utils/TcMType.hs - compiler/GHC/Tc/Utils/Unify.hs Changes: ===================================== compiler/GHC/Core/Coercion.hs ===================================== @@ -64,8 +64,6 @@ module GHC.Core.Coercion ( mkForAllCastCo, mkFunResCastCo, mkFunCastCoNoFTF, - mkGReflLeftCastCo, - mkGReflRightCastCo, applyForAllTy, decomposeFunCastCo, @@ -399,7 +397,7 @@ mkSymMCo (MCo co) = MCo (mkSymCo co) -- | Cast a type by an 'MCoercion' mkCastTyMCo :: Type -> MCoercion -> Type mkCastTyMCo ty MRefl = ty -mkCastTyMCo ty (MCo co) = ty `mkCastTy` CCoercion co +mkCastTyMCo ty (MCo co) = ty `mkCastTy` co mkFunResMCo :: Id -> CastCoercion -> CastCoercion mkFunResMCo _ ReflCastCo = ReflCastCo @@ -414,17 +412,6 @@ mkGReflRightMCo :: Role -> Type -> MCoercionN -> Coercion mkGReflRightMCo r ty MRefl = mkReflCo r ty mkGReflRightMCo r ty (MCo co) = mkGReflRightCo r ty co -mkGReflLeftCastCo :: Role -> Type -> CastCoercion -> Coercion -mkGReflLeftCastCo r ty ReflCastCo = mkReflCo r ty -mkGReflLeftCastCo r ty (CCoercion co) = mkGReflLeftCo r ty co -mkGReflLeftCastCo _r _ty (ZCoercion _ki _cos) = error "AMG TODO mkGReflLeftCastCo" - -mkGReflRightCastCo :: Role -> Type -> CastCoercion -> Coercion -mkGReflRightCastCo r ty ReflCastCo = mkReflCo r ty -mkGReflRightCastCo r ty (CCoercion co) = mkGReflRightCo r ty co -mkGReflRightCastCo _r _ty (ZCoercion _ki _cos) = error "AMG TODO mkGReflRightCastCo" - - -- | Like 'mkCoherenceRightCo', but with an 'MCoercion' mkCoherenceRightMCo :: Role -> Type -> MCoercionN -> Coercion -> Coercion mkCoherenceRightMCo _ _ MRefl co2 = co2 @@ -539,7 +526,7 @@ decomposePiCos orig_co (Pair orig_k1 orig_k2) orig_args -- res_co :: t1[ty |> arg_co / a] ~ t2[ty / b] = let arg_co = mkSelCo SelForAll (mkSymCo co) res_co = mkInstCo co (mkGReflLeftCo Nominal ty arg_co) - subst1' = extendTCvSubst subst1 a (ty `CastTy` CCoercion arg_co) + subst1' = extendTCvSubst subst1 a (ty `CastTy` arg_co) subst2' = extendTCvSubst subst2 b ty in go (arg_co : acc_arg_cos) (subst1', t1) res_co (subst2', t2) tys @@ -1810,10 +1797,10 @@ castCoercionKind1 :: Coercion -> Role -> Type -> Type castCoercionKind1 g r t1 t2 h = case g of Refl {} -> assert (r == Nominal) $ -- Refl is always Nominal - mkNomReflCo (mkCastTy t2 (CCoercion h)) + mkNomReflCo (mkCastTy t2 h) GRefl _ _ mco -> case mco of - MRefl -> mkReflCo r (mkCastTy t2 (CCoercion h)) - MCo kind_co -> mkGReflMCo r (mkCastTy t1 (CCoercion h)) + MRefl -> mkReflCo r (mkCastTy t2 h) + MCo kind_co -> mkGReflMCo r (mkCastTy t1 h) (mkSymCo h `mkTransCo` kind_co `mkTransCo` h) _ -> castCoercionKind2 g r t1 t2 h h @@ -2306,10 +2293,8 @@ ty_co_subst !lc role ty else pprPanic "ty_co_subst: covar is not almost devoid" (ppr t) go r ty@(LitTy {}) = assert (r == Nominal) $ mkNomReflCo ty - go r (CastTy ty cco) = castCoercionKind (go r ty) (substLeftCo lc co) + go r (CastTy ty co) = castCoercionKind (go r ty) (substLeftCo lc co) (substRightCo lc co) - where - co = castCoToCo (typeKind ty) cco go r (CoercionTy co) = mkProofIrrelCo r kco (substLeftCo lc co) (substRightCo lc co) where kco = go Nominal (coercionType co) @@ -2632,7 +2617,7 @@ coercion_lr_kind which orig_co where go (Refl ty) = ty go (GRefl _ ty MRefl) = ty - go (GRefl _ ty (MCo co1)) = pickLR which (ty, mkCastTy ty (CCoercion co1)) + go (GRefl _ ty (MCo co1)) = pickLR which (ty, mkCastTy ty co1) go (TyConAppCo _ tc cos) = mkTyConApp tc (map go cos) go (AppCo co1 co2) = mkAppTy (go co1) (go co2) go (CoVarCo cv) = go_covar cv @@ -2725,7 +2710,7 @@ coercion_lr_kind which orig_co k2 = coercionRKind k_co tv2 = setTyVarKind tv1 (substTy subst k2) subst' = extendTvSubst (extendSubstInScope subst tv2) tv1 $ - TyVarTy tv2 `mkCastTy` CCoercion (mkSymCo k_co) + TyVarTy tv2 `mkCastTy` mkSymCo k_co go_forall_right subst (ForAllCo { fco_tcv = cv1, fco_visR = visR , fco_kind = k_mco, fco_body = co }) @@ -2830,15 +2815,13 @@ buildCoercion orig_ty1 orig_ty2 = go orig_ty1 orig_ty2 go ty1 ty2 | Just ty1' <- coreView ty1 = go ty1' ty2 | Just ty2' <- coreView ty2 = go ty1 ty2' - go (CastTy ty1 cco) ty2 - = let co = castCoToCo (typeKind ty1) cco - co' = go ty1 ty2 + go (CastTy ty1 co) ty2 + = let co' = go ty1 ty2 r = coercionRole co' in mkCoherenceLeftCo r ty1 co co' - go ty1 (CastTy ty2 cco) - = let co = castCoToCo (typeKind ty2) cco - co' = go ty1 ty2 + go ty1 (CastTy ty2 co) + = let co' = go ty1 ty2 r = coercionRole co' in mkCoherenceRightCo r ty2 co co' @@ -2875,7 +2858,7 @@ buildCoercion orig_ty1 orig_ty2 = go orig_ty1 orig_ty2 where kind_co = go (tyVarKind tv1) (tyVarKind tv2) in_scope = mkInScopeSet $ tyCoVarsOfType ty2 `unionVarSet` tyCoVarsOfCo kind_co ty2' = substTyWithInScope in_scope [tv2] - [mkTyVarTy tv1 `mkCastTy` CCoercion kind_co] + [mkTyVarTy tv1 `mkCastTy` kind_co] ty2 go (ForAllTy (Bndr cv1 flag1) ty1) (ForAllTy (Bndr cv2 flag2) ty2) @@ -2989,7 +2972,7 @@ eqCastCoercionX env ty1 co1 ty2 co2 = eqTypeX env ty1 ty2 -- | Convert a 'CastCoercion' back into a 'Coercion', using a 'UnivCo' if we -- have discarded the original 'Coercion'. -castCoToCo :: Type -> CastCoercion -> Coercion +castCoToCo :: Type -> CastCoercion -> CoercionR castCoToCo _ (CCoercion co) = co castCoToCo lhs_ty (ZCoercion rhs_ty cos) = mkUnivCo ZCoercionProv (map CoVarCo (nonDetEltsUniqSet cos)) Representational lhs_ty rhs_ty castCoToCo lhs_ty ReflCastCo = mkRepReflCo lhs_ty ===================================== compiler/GHC/Core/Coercion.hs-boot ===================================== @@ -55,9 +55,3 @@ coercionType :: Coercion -> Type topNormaliseNewType_maybe :: Type -> Maybe (Coercion, Type) -- used to look through newtypes to the right of -- function arrows, in 'GHC.Core.Type.getRuntimeArgTys' - -castCoToCo :: Type -> CastCoercion -> Coercion -isReflexiveCastCo :: Type -> CastCoercion -> Bool -mkTransCastCo :: HasDebugCallStack => CastCoercion -> CastCoercion -> CastCoercion -seqCastCoercion :: CastCoercion -> () -castCoercionRKind :: HasDebugCallStack => Type -> CastCoercion -> Type ===================================== compiler/GHC/Core/Coercion/Opt.hs ===================================== @@ -884,7 +884,7 @@ opt_trans_rule is co1 co2 (opt_trans is' r1 r2') where is' = is `extendInScopeSet` tv1 - r2' = substCoWithInScope is' [tv2] [mkCastTyCo (TyVarTy tv1) kco1] r2 + r2' = substCoWithInScope is' [tv2] [mkCastTy (TyVarTy tv1) kco1] r2 -- Push transitivity inside forall -- forall over coercions. @@ -1481,7 +1481,7 @@ optForAllCoBndr env sym tcv k_mco -- override the substitution for the original variable to the -- re-kinded one, suitably casted tv2 = tv1 `setTyVarKind` coercionLKind k_co' - subst2 = (extendTvSubst subst1 tcv (mkTyVarTy tv2 `CastTy` CCoercion k_co')) + subst2 = (extendTvSubst subst1 tcv (mkTyVarTy tv2 `CastTy` k_co')) `extendSubstInScope` tv2 _ -> (subst1, tv1) ===================================== compiler/GHC/Core/FamInstEnv.hs ===================================== @@ -1485,10 +1485,9 @@ normalise_type ty ; redn <- withLC lc' $ normalise_type ty ; return $ mkForAllRedn vis tv' k_redn redn } go (TyVarTy tv) = normalise_tyvar tv - go (CastTy ty cco) + go (CastTy ty co) = do { redn <- go ty ; lc <- getLC - ; let co = castCoToCo (typeKind ty) cco ; let co' = substRightCo lc co ; return $ mkCastRedn2 Nominal ty co redn co' -- ^^^^^^^^^^^ uses castCoercionKind2 ===================================== compiler/GHC/Core/Lint.hs ===================================== @@ -1990,10 +1990,9 @@ lintType ty@(ForAllTy {}) = do { lintType body_ty ; lintForAllBody tcvs body_ty } -lintType (CastTy ty cco) +lintType (CastTy ty co) = do { lintType ty ; ty_kind <- substTyM (typeKind ty) - ; let co = castCoToCo (typeKind ty) cco -- TODO: maybe show the actual cco in mkCastTyErr/mkCastErr? ; co_lk <- lintStarCoercion co ; ensureEqTys ty_kind co_lk (mkCastTyErr ty co ty_kind co_lk) } ===================================== compiler/GHC/Core/Opt/Arity.hs ===================================== @@ -2925,7 +2925,7 @@ pushCoTyArg co ty | isForAllTy_ty tyL = assertPpr (isForAllTy_ty tyR) (ppr co $$ ppr ty) $ - Just (ty `mkCastTyCo` co1, coercionLKind co2, CCoercion co2) + Just (ty `mkCastTy` co1, coercionLKind co2, CCoercion co2) | otherwise = Nothing ===================================== compiler/GHC/Core/Reduction.hs ===================================== @@ -227,7 +227,7 @@ mkGReflRightRedn :: Role -> Type -> CoercionN -> Reduction mkGReflRightRedn role ty co = mkReduction (mkGReflRightCo role ty co) - (mkCastTyCo ty co) + (mkCastTy ty co) {-# INLINE mkGReflRightRedn #-} -- | Create a 'Reduction' from a kind cast, in which @@ -236,11 +236,11 @@ mkGReflRightRedn role ty co -- Given @ty :: k1@, @mco :: k1 ~ k2@, -- produces the 'Reduction' @ty ~res_co~> (ty |> mco)@ -- at the given 'Role'. -mkGReflRightMRedn :: Role -> Type -> CastCoercion -> Reduction +mkGReflRightMRedn :: Role -> Type -> MCoercionN -> Reduction mkGReflRightMRedn role ty mco = mkReduction - (mkGReflRightCastCo role ty mco) - (mkCastTy ty mco) + (mkGReflRightMCo role ty mco) + (mkCastTyMCo ty mco) {-# INLINE mkGReflRightMRedn #-} -- | Create a 'Reduction' from a kind cast, in which @@ -262,10 +262,10 @@ mkGReflLeftRedn role ty co -- Given @ty :: k1@, @mco :: k1 ~ k2@, -- produces the 'Reduction' @(ty |> mco) ~res_co~> ty@ -- at the given 'Role'. -mkGReflLeftMRedn :: Role -> Type -> CastCoercion -> Reduction +mkGReflLeftMRedn :: Role -> Type -> MCoercionN -> Reduction mkGReflLeftMRedn role ty mco = mkReduction - (mkGReflLeftCastCo role ty mco) + (mkGReflLeftMCo role ty mco) ty {-# INLINE mkGReflLeftMRedn #-} @@ -279,7 +279,7 @@ mkCoherenceRightRedn :: Role -> Reduction -> CoercionN -> Reduction mkCoherenceRightRedn r (Reduction co1 ty2) kco = mkReduction (mkCoherenceRightCo r ty2 kco co1) - (mkCastTyCo ty2 kco) + (mkCastTy ty2 kco) {-# INLINE mkCoherenceRightRedn #-} -- | Apply a cast to the result of a 'Reduction', using an 'MCoercionN'. @@ -314,7 +314,7 @@ mkCastRedn1 r ty cast_co (Reduction co xi) -- return_co :: (ty |> cast_co) ~r (ty' |> cast_co) = mkReduction (castCoercionKind1 co r ty xi cast_co) - (mkCastTyCo xi cast_co) + (mkCastTy xi cast_co) {-# INLINE mkCastRedn1 #-} -- | Apply casts on both sides of a 'Reduction' (of the given 'Role'). @@ -333,7 +333,7 @@ mkCastRedn2 :: Role mkCastRedn2 r ty cast_co (Reduction nco nty) cast_co' = mkReduction (castCoercionKind2 nco r ty nty cast_co cast_co') - (mkCastTyCo nty cast_co') + (mkCastTy nty cast_co') {-# INLINE mkCastRedn2 #-} -- | Apply one 'Reduction' to another. ===================================== compiler/GHC/Core/TyCo/FVs.hs ===================================== @@ -76,7 +76,6 @@ import GHC.Utils.EndoOS import GHC.Data.Pair -import Data.Maybe import Data.Semigroup {- @@ -668,7 +667,7 @@ tyCoFVsOfType (LitTy {}) f bound_vars acc = emptyFV f bound_vars acc tyCoFVsOfType (AppTy fun arg) f bound_vars acc = (tyCoFVsOfType fun `unionFV` tyCoFVsOfType arg) f bound_vars acc tyCoFVsOfType (FunTy _ w arg res) f bound_vars acc = (tyCoFVsOfType w `unionFV` tyCoFVsOfType arg `unionFV` tyCoFVsOfType res) f bound_vars acc tyCoFVsOfType (ForAllTy bndr ty) f bound_vars acc = tyCoFVsBndr bndr (tyCoFVsOfType ty) f bound_vars acc -tyCoFVsOfType (CastTy ty co) f bound_vars acc = (tyCoFVsOfType ty `unionFV` tyCoFVsOfCastCoercion co) f bound_vars acc +tyCoFVsOfType (CastTy ty co) f bound_vars acc = (tyCoFVsOfType ty `unionFV` tyCoFVsOfCo co) f bound_vars acc tyCoFVsOfType (CoercionTy co) f bound_vars acc = tyCoFVsOfCo co f bound_vars acc tyCoFVsBndr :: ForAllTyBinder -> FV -> FV @@ -766,11 +765,6 @@ almost_devoid_co_var_of_mco :: MCoercion -> CoVar -> Bool almost_devoid_co_var_of_mco MRefl _ = True almost_devoid_co_var_of_mco (MCo co) cv = almost_devoid_co_var_of_co co cv -almost_devoid_co_var_of_cast_co :: CastCoercion -> CoVar -> Bool -almost_devoid_co_var_of_cast_co ReflCastCo _ = True -almost_devoid_co_var_of_cast_co (CCoercion co) cv = almost_devoid_co_var_of_co co cv -almost_devoid_co_var_of_cast_co (ZCoercion ty cos) cv = almost_devoid_co_var_of_type ty cv && not (elemVarSet cv cos) - almost_devoid_co_var_of_co :: Coercion -> CoVar -> Bool almost_devoid_co_var_of_co (Refl {}) _ = True -- covar is allowed in Refl and almost_devoid_co_var_of_co (GRefl {}) _ = True -- GRefl, so we don't look into @@ -835,7 +829,7 @@ almost_devoid_co_var_of_type (ForAllTy (Bndr v _) ty) cv && (v == cv || almost_devoid_co_var_of_type ty cv) almost_devoid_co_var_of_type (CastTy ty co) cv = almost_devoid_co_var_of_type ty cv - && almost_devoid_co_var_of_cast_co co cv + && almost_devoid_co_var_of_co co cv almost_devoid_co_var_of_type (CoercionTy co) cv = almost_devoid_co_var_of_co co cv @@ -872,7 +866,7 @@ visVarsOfType orig_ty = Pair invis_vars vis_vars = ((`delVarSet` tv) <$> go ty) `mappend` (invisible (tyCoVarsOfType $ varType tv)) go (LitTy {}) = mempty - go (CastTy ty co) = go ty `mappend` invisible (tyCoVarsOfCastCo co) + go (CastTy ty co) = go ty `mappend` invisible (tyCoVarsOfCo co) go (CoercionTy co) = invisible $ tyCoVarsOfCo co invisible vs = Pair vs emptyVarSet @@ -1011,7 +1005,7 @@ invisibleVarsOfType = go where (invisibles, visibles) = partitionInvisibleTypes tc tys go (ForAllTy tvb ty) = tyCoFVsBndr tvb $ go ty go LitTy{} = emptyFV - go (CastTy ty co) = tyCoFVsOfCastCoercion co `unionFV` go ty + go (CastTy ty co) = tyCoFVsOfCo co `unionFV` go ty go (CoercionTy co) = tyCoFVsOfCo co -- | Like 'invisibleVarsOfType', but for many types. @@ -1102,7 +1096,7 @@ tyConsOfType ty go a `unionUniqSets` go b `unionUniqSets` go_tc (funTyFlagTyCon af) go (ForAllTy (Bndr tv _) ty) = go ty `unionUniqSets` go (varType tv) - go (CastTy ty co) = go ty `unionUniqSets` go_cast_co co + go (CastTy ty co) = go ty `unionUniqSets` go_co co go (CoercionTy co) = go_co co go_co (Refl ty) = go ty @@ -1129,10 +1123,6 @@ tyConsOfType ty go_mco MRefl = emptyUniqSet go_mco (MCo co) = go_co co - go_cast_co ReflCastCo = emptyUniqSet - go_cast_co (CCoercion co) = go_co co - go_cast_co (ZCoercion ty _cos) = go ty - go_cos cos = foldr (unionUniqSets . go_co) emptyUniqSet cos go_tc tc = unitUniqSet tc @@ -1266,7 +1256,7 @@ occCheckExpand vs_to_avoid ty -- Failing that, try to expand a synonym go cxt (CastTy ty co) = do { ty' <- go cxt ty - ; co' <- go_cast_co cxt co + ; co' <- go_co cxt co ; return (CastTy ty' co') } go cxt (CoercionTy co) = do { co' <- go_co cxt co ; return (CoercionTy co') } @@ -1283,14 +1273,6 @@ occCheckExpand vs_to_avoid ty go_mco _ MRefl = return MRefl go_mco ctx (MCo co) = MCo <$> go_co ctx co - go_cast_co _ ReflCastCo = return ReflCastCo - go_cast_co ctx (CCoercion co) = CCoercion <$> go_co ctx co - go_cast_co ctx (ZCoercion ty cos) = ZCoercion <$> go ctx ty <*> go_covars ctx cos - - go_covars (as, env) cos - | anyVarSet (bad_var_occ as) cos = Nothing - | otherwise = return $ mapVarSet (\cv -> fromMaybe cv (lookupVarEnv env cv)) cos - ------------------ go_co cxt (Refl ty) = do { ty' <- go cxt ty ; return (Refl ty') } ===================================== compiler/GHC/Core/TyCo/Rep.hs ===================================== @@ -186,7 +186,7 @@ data Type | CastTy Type - CastCoercion -- ^ A kind cast. The coercion is always nominal. + KindCoercion -- ^ A kind cast. The coercion is always nominal. -- INVARIANT: The cast is never reflexive \(EQ2) -- INVARIANT: The Type is not a CastTy (use TransCo instead) \(EQ3) -- INVARIANT: The Type is not a ForAllTy over a tyvar \(EQ4) @@ -2055,7 +2055,7 @@ foldTyCo (TyCoFolder { tcf_view = view go_ty env (TyVarTy tv) = tyvar env tv go_ty env (AppTy t1 t2) = go_ty env t1 `mappend` go_ty env t2 go_ty _ (LitTy {}) = mempty - go_ty env (CastTy ty co) = go_ty env ty `mappend` go_cast_co env co + go_ty env (CastTy ty co) = go_ty env ty `mappend` go_co env co go_ty env (CoercionTy co) = go_co env co go_ty env (FunTy _ w arg res) = go_ty env w `mappend` go_ty env arg `mappend` go_ty env res go_ty env (TyConApp _ tys) = go_tys env tys @@ -2071,10 +2071,6 @@ foldTyCo (TyCoFolder { tcf_view = view go_cos _ [] = mempty go_cos env (c:cs) = go_co env c `mappend` go_cos env cs - go_cast_co _ ReflCastCo = mempty - go_cast_co env (CCoercion co) = go_co env co - go_cast_co env (ZCoercion ty cos) = go_ty env ty `mappend` nonDetStrictFoldVarSet (mappend . covar env) mempty cos - go_co env (Refl ty) = go_ty env ty go_co env (GRefl _ ty MRefl) = go_ty env ty go_co env (GRefl _ ty (MCo co)) = go_ty env ty `mappend` go_co env co @@ -2138,7 +2134,7 @@ typeSize (AppTy t1 t2) = typeSize t1 + typeSize t2 typeSize (FunTy _ _ t1 t2) = typeSize t1 + typeSize t2 typeSize (ForAllTy (Bndr tv _) t) = typeSize (varType tv) + typeSize t typeSize (TyConApp _ ts) = 1 + typesSize ts -typeSize (CastTy ty co) = typeSize ty + castCoercionSize co +typeSize (CastTy ty co) = typeSize ty + coercionSize co typeSize (CoercionTy co) = coercionSize co typesSize :: [Type] -> Int ===================================== compiler/GHC/Core/TyCo/Subst.hs ===================================== @@ -797,7 +797,7 @@ subst_ty subst ty !(subst',tv') = substVarBndrUnchecked subst tv -- Unchecked because subst_ty is used from substTyUnchecked go (LitTy n) = LitTy $! n - go (CastTy ty co) = (mkCastTy $! (go ty)) $! (subst_cast_co subst co) + go (CastTy ty co) = (mkCastTy $! (go ty)) $! (subst_co subst co) go (CoercionTy co) = CoercionTy $! (subst_co subst co) substTyVar :: Subst -> TyVar -> Type @@ -835,14 +835,9 @@ lookupTyVar (Subst _ _ tenv _) tv lookupVarEnv tenv tv substCastCo :: HasDebugCallStack => Subst -> CastCoercion -> CastCoercion -substCastCo subst co - | isEmptyTCvSubst subst = co - | otherwise = {- checkValidSubst subst [] [co] $ -} subst_cast_co subst co -- TODO - -subst_cast_co :: HasDebugCallStack => Subst -> CastCoercion -> CastCoercion -subst_cast_co subst (CCoercion co) = CCoercion $! subst_co subst co -subst_cast_co subst (ZCoercion ty cos) = (ZCoercion $! subst_ty subst ty) $! substCoVarSet subst cos -subst_cast_co _ ReflCastCo = ReflCastCo +substCastCo subst (CCoercion co) = CCoercion (substCo subst co) +substCastCo subst (ZCoercion ty cos) = ZCoercion (substTy subst ty) (substCoVarSet subst cos) +substCastCo _ ReflCastCo = ReflCastCo substCoVarSet :: HasDebugCallStack => Subst -> CoVarSet -> CoVarSet substCoVarSet subst = nonDetStrictFoldVarSet (unionVarSet . shallowCoVarsOfCo . substCoVar subst) emptyVarSet -- TODO better impl; determinism? ===================================== compiler/GHC/Core/TyCo/Tidy.hs ===================================== @@ -235,7 +235,7 @@ tidyType env (TyVarTy tv) = TyVarTy $! tidyTyCoVarOcc env tv tidyType _ t@(TyConApp _ []) = t -- Preserve sharing if possible tidyType env (TyConApp tycon tys) = TyConApp tycon $! tidyTypes env tys tidyType env (AppTy fun arg) = (AppTy $! (tidyType env fun)) $! (tidyType env arg) -tidyType env (CastTy ty co) = (CastTy $! tidyType env ty) $! (tidyCastCo env co) +tidyType env (CastTy ty co) = (CastTy $! tidyType env ty) $! (tidyCo env co) tidyType env (CoercionTy co) = CoercionTy $! (tidyCo env co) tidyType env ty@(FunTy _ w arg res) = let { !w' = tidyType env w ; !arg' = tidyType env arg ===================================== compiler/GHC/Core/Type.hs ===================================== @@ -73,7 +73,6 @@ module GHC.Core.Type ( getLevity, levityType_maybe, mkCastTy, mkCoercionTy, splitCastTy_maybe, - mkCastTyCo, ErrorMsgType, pprUserTypeErrorTy, @@ -237,7 +236,6 @@ import GHC.Core.TyCo.FVs import GHC.Types.Var import GHC.Types.Var.Env import GHC.Types.Var.Set -import GHC.Types.Unique.Set import GHC.Core.TyCon import GHC.Builtin.Types.Prim @@ -260,12 +258,9 @@ import {-# SOURCE #-} GHC.Core.Coercion , mkSymCo, mkTransCo, mkSelCo, mkLRCo, mkInstCo , mkKindCo, mkSubCo, mkFunCo, funRole , decomposePiCos, coercionKind - , coercionType - , isReflexiveCastCo, seqCo + , coercionRKind, coercionType + , isReflexiveCo, seqCo , topNormaliseNewType_maybe - , mkTransCastCo - , seqCastCoercion, castCoercionRKind - , castCoToCo ) import {-# SOURCE #-} GHC.Tc.Utils.TcType ( isConcreteTyVar ) @@ -519,16 +514,12 @@ expandTypeSynonyms ty go subst (ForAllTy (Bndr tv vis) t) = let (subst', tv') = substVarBndrUsing go subst tv in ForAllTy (Bndr tv' vis) (go subst' t) - go subst (CastTy ty co) = mkCastTy (go subst ty) (go_cast_co subst co) + go subst (CastTy ty co) = mkCastTy (go subst ty) (go_co subst co) go subst (CoercionTy co) = mkCoercionTy (go_co subst co) go_mco _ MRefl = MRefl go_mco subst (MCo co) = MCo (go_co subst co) - go_cast_co _ ReflCastCo = ReflCastCo - go_cast_co subst (CCoercion co) = CCoercion (go_co subst co) - go_cast_co subst (ZCoercion ty cos) = ZCoercion (go subst ty) (substCoVarSet subst cos) - go_co subst (Refl ty) = mkNomReflCo (go subst ty) go_co subst (GRefl r ty mco) @@ -914,7 +905,7 @@ mapTyCoX (TyCoMapper { tcm_tyvar = tyvar go_ty !env (TyVarTy tv) = tyvar env tv go_ty !env (AppTy t1 t2) = mkAppTy <$> go_ty env t1 <*> go_ty env t2 go_ty !_ ty@(LitTy {}) = return ty - go_ty !env (CastTy ty co) = mkCastTy <$> go_ty env ty <*> go_cast_co env co + go_ty !env (CastTy ty co) = mkCastTy <$> go_ty env ty <*> go_co env co go_ty !env (CoercionTy co) = CoercionTy <$> go_co env co go_ty !env ty@(FunTy _ w arg res) @@ -945,10 +936,6 @@ mapTyCoX (TyCoMapper { tcm_tyvar = tyvar go_mco !_ MRefl = return MRefl go_mco !env (MCo co) = MCo <$> (go_co env co) - go_cast_co !_ ReflCastCo = return ReflCastCo - go_cast_co !env (CCoercion co) = CCoercion <$> (go_co env co) - go_cast_co !env (ZCoercion ty cos) = ZCoercion <$> go_ty env ty <*> (coVarsOfCos <$> mapM (covar env) (nonDetEltsUniqSet cos)) -- TODO - go_co :: env -> Coercion -> m Coercion go_co !env (Refl ty) = Refl <$> go_ty env ty go_co !env (GRefl r ty mco) = mkGReflCo r <$> go_ty env ty <*> go_mco env mco @@ -1033,10 +1020,10 @@ isTyVarTy ty = isJust (getTyVar_maybe ty) -- | If the type is a tyvar, possibly under a cast, returns it, along -- with the coercion. Thus, the co is :: kind tv ~N kind ty -getCastedTyVar_maybe :: Type -> Maybe (TyVar, CastCoercion) +getCastedTyVar_maybe :: Type -> Maybe (TyVar, CoercionN) getCastedTyVar_maybe ty = case coreFullView ty of CastTy (TyVarTy tv) co -> Just (tv, co) - TyVarTy tv -> Just (tv, ReflCastCo) + TyVarTy tv -> Just (tv, mkReflCo Nominal (tyVarKind tv)) _ -> Nothing @@ -1076,10 +1063,9 @@ type checker (e.g. when matching type-function equations). -- | Applies a type to another, as in e.g. @k a@ mkAppTy :: Type -> Type -> Type -- See Note [Respecting definitional equality], invariant (EQ1). -mkAppTy (CastTy fun_ty cco) arg_ty - | let co = castCoToCo (typeKind fun_ty) cco -- TOOD: can we get rid of this? - , ([arg_co], res_co) <- decomposePiCos co (coercionKind co) [arg_ty] - = (fun_ty `mkAppTy` (arg_ty `mkCastTy` CCoercion arg_co)) `mkCastTy` CCoercion res_co +mkAppTy (CastTy fun_ty co) arg_ty + | ([arg_co], res_co) <- decomposePiCos co (coercionKind co) [arg_ty] + = (fun_ty `mkAppTy` (arg_ty `mkCastTy` arg_co)) `mkCastTy` res_co mkAppTy (TyConApp tc tys) ty2 = mkTyConApp tc (tys ++ [ty2]) mkAppTy ty1 ty2 = AppTy ty1 ty2 @@ -1098,16 +1084,15 @@ mkAppTy ty1 ty2 = AppTy ty1 ty2 mkAppTys :: Type -> [Type] -> Type mkAppTys ty1 [] = ty1 -mkAppTys (CastTy fun_ty cco) arg_tys -- much more efficient then nested mkAppTy +mkAppTys (CastTy fun_ty co) arg_tys -- much more efficient then nested mkAppTy -- Why do this? See (EQ1) of -- Note [Respecting definitional equality] -- in GHC.Core.TyCo.Rep - = foldl' AppTy ((mkAppTys fun_ty casted_arg_tys) `mkCastTy` CCoercion res_co) leftovers + = foldl' AppTy ((mkAppTys fun_ty casted_arg_tys) `mkCastTy` res_co) leftovers where - co = castCoToCo (typeKind fun_ty) cco (arg_cos, res_co) = decomposePiCos co (coercionKind co) arg_tys (args_to_cast, leftovers) = splitAtList arg_cos arg_tys - casted_arg_tys = zipWith (\ ty co -> mkCastTy ty (CCoercion co)) args_to_cast arg_cos + casted_arg_tys = zipWith mkCastTy args_to_cast arg_cos mkAppTys (TyConApp tc tys1) tys2 = mkTyConApp tc (tys1 ++ tys2) mkAppTys ty1 tys2 = foldl' AppTy ty1 tys2 @@ -1662,19 +1647,16 @@ newTyConInstRhs tycon tys * * ********************************************************************* -} -splitCastTy_maybe :: Type -> Maybe (Type, CastCoercion) +splitCastTy_maybe :: Type -> Maybe (Type, Coercion) splitCastTy_maybe ty | CastTy ty' co <- coreFullView ty = Just (ty', co) | otherwise = Nothing -mkCastTyCo :: Type -> Coercion -> Type -mkCastTyCo ty co = mkCastTy ty (CCoercion co) - -- | Make a 'CastTy'. The Coercion must be nominal. Checks the -- Coercion for reflexivity, dropping it if it's reflexive. -- See @Note [Respecting definitional equality]@ in "GHC.Core.TyCo.Rep" -mkCastTy :: Type -> CastCoercion -> Type -mkCastTy orig_ty co | isReflexiveCastCo (typeKind orig_ty) co = orig_ty -- (EQ2) from the Note +mkCastTy :: Type -> Coercion -> Type +mkCastTy orig_ty co | isReflexiveCo co = orig_ty -- (EQ2) from the Note -- NB: Do the slow check here. This is important to keep the splitXXX -- functions working properly. Otherwise, we may end up with something -- like (((->) |> something_reflexive_but_not_obviously_so) biz baz) @@ -1684,7 +1666,7 @@ mkCastTy orig_ty co = mk_cast_ty orig_ty co -- | Like 'mkCastTy', but avoids checking the coercion for reflexivity, -- as that can be expensive. -mk_cast_ty :: Type -> CastCoercion -> Type +mk_cast_ty :: Type -> Coercion -> Type mk_cast_ty orig_ty co = go orig_ty where go :: Type -> Type @@ -1693,14 +1675,14 @@ mk_cast_ty orig_ty co = go orig_ty go (CastTy ty co1) -- (EQ3) from the Note - = mkCastTy ty (co1 `mkTransCastCo` co) + = mkCastTy ty (co1 `mkTransCo` co) -- call mkCastTy again for the reflexivity check go (ForAllTy (Bndr tv vis) inner_ty) -- (EQ4) from the Note -- See Note [Weird typing rule for ForAllTy] in GHC.Core.TyCo.Rep. | isTyVar tv - , let fvs = tyCoVarsOfCastCo co + , let fvs = tyCoVarsOfCo co = -- have to make sure that pushing the co in doesn't capture the bound var! if tv `elemVarSet` fvs then let empty_subst = mkEmptySubst (mkInScopeSet fvs) @@ -2564,7 +2546,7 @@ seqType (AppTy t1 t2) = seqType t1 `seq` seqType t2 seqType (FunTy _ w t1 t2) = seqType w `seq` seqType t1 `seq` seqType t2 seqType (TyConApp tc tys) = tc `seq` seqTypes tys seqType (ForAllTy (Bndr tv _) ty) = seqType (varType tv) `seq` seqType ty -seqType (CastTy ty co) = seqType ty `seq` seqCastCoercion co +seqType (CastTy ty co) = seqType ty `seq` seqCo co seqType (CoercionTy co) = seqCo co seqTypes :: [Type] -> () @@ -2658,7 +2640,7 @@ typeKind (TyConApp tc tys) = piResultTys (tyConKind tc) tys typeKind (LitTy l) = typeLiteralKind l typeKind (FunTy { ft_af = af }) = liftedTypeOrConstraintKind (funTyFlagResultTypeOrConstraint af) typeKind (TyVarTy tyvar) = tyVarKind tyvar -typeKind (CastTy ty co) = castCoercionRKind (typeKind ty) co +typeKind (CastTy _ty co) = coercionRKind co typeKind (CoercionTy co) = coercionType co typeKind (AppTy fun arg) ===================================== compiler/GHC/Core/Type.hs-boot ===================================== @@ -4,7 +4,7 @@ module GHC.Core.Type where import GHC.Prelude import {-# SOURCE #-} GHC.Core.TyCon -import {-# SOURCE #-} GHC.Core.TyCo.Rep( Type, CastCoercion ) +import {-# SOURCE #-} GHC.Core.TyCo.Rep( Type, Coercion ) import GHC.Utils.Misc import GHC.Types.Var( FunTyFlag, TyVar ) import GHC.Types.Basic( TypeOrConstraint ) @@ -16,7 +16,7 @@ chooseFunTyFlag :: HasDebugCallStack => Type -> Type -> FunTyFlag typeKind :: HasDebugCallStack => Type -> Type isCoercionTy :: Type -> Bool mkAppTy :: Type -> Type -> Type -mkCastTy :: Type -> CastCoercion -> Type +mkCastTy :: Type -> Coercion -> Type mkTyConApp :: TyCon -> [Type] -> Type getLevity :: HasDebugCallStack => Type -> Type getTyVar_maybe :: Type -> Maybe TyVar ===================================== compiler/GHC/Core/Unify.hs ===================================== @@ -1582,13 +1582,12 @@ type AmIUnifying = Bool -- True <=> Unifying -- False <=> Matching type InType = Type -- Before applying the RnEnv2 -type OutCastCoercion = CastCoercion -- After applying the RnEnv2 - +type OutCoercion = Coercion -- After applying the RnEnv2 unify_ty :: UMEnv -> InType -> InType -- Types to be unified - -> OutCastCoercion -- A nominal coercion between their kinds + -> OutCoercion -- A nominal coercion between their kinds -- OutCoercion: the RnEnv has already been applied -- When matching, the coercion is in "target space", -- not "template space" @@ -1610,28 +1609,28 @@ unify_ty env ty1 ty2 kco | Just ty2' <- coreView ty2 = unify_ty env ty1 ty2' kco unify_ty env (CastTy ty1 co1) ty2 kco - | mentionsForAllBoundTyVarsL env (tyCoVarsOfCastCo co1) + | mentionsForAllBoundTyVarsL env (tyCoVarsOfCo co1) -- See (KCU1) in Note [Kind coercions in Unify] = maybeApart MARCast -- See (KCU2) | um_unif env - = unify_ty env ty1 ty2 (co1 `mkTransCastCo` kco) + = unify_ty env ty1 ty2 (co1 `mkTransCo` kco) | otherwise -- We are matching, not unifying = do { subst <- getSubst env - ; let co' = substCastCo subst co1 + ; let co' = substCo subst co1 -- We match left-to-right, so the free template vars of the -- coercion should already have been matched. -- See Note [Matching in the presence of casts (1)] -- NB: co1 does not mention forall-bound vars, so no need to rename - ; unify_ty env ty1 ty2 (co' `mkTransCastCo` kco) } + ; unify_ty env ty1 ty2 (co' `mkTransCo` kco) } unify_ty env ty1 (CastTy ty2 co2) kco - | mentionsForAllBoundTyVarsR env (tyCoVarsOfCastCo co2) + | mentionsForAllBoundTyVarsR env (tyCoVarsOfCo co2) -- See (KCU1) in Note [Kind coercions in Unify] = maybeApart MARCast -- See (KCU2) | otherwise - = unify_ty env ty1 ty2 (kco `mkTransCastCo` mkSymCastCo (typeKind ty2) co2) + = unify_ty env ty1 ty2 (kco `mkTransCo` mkSymCo co2) -- NB: co2 does not mention forall-bound variables -- Applications need a bit of care! @@ -1648,7 +1647,7 @@ unify_ty _ (LitTy x) (LitTy y) _kco | x == y = return () unify_ty env (ForAllTy (Bndr tv1 _) ty1) (ForAllTy (Bndr tv2 _) ty2) kco -- ToDo: See Note [Unifying coercion-foralls] - = do { unify_ty env (varType tv1) (varType tv2) ReflCastCo + = do { unify_ty env (varType tv1) (varType tv2) (mkNomReflCo liftedTypeKind) ; let env' = umRnBndr2 env tv1 tv2 ; unify_ty env' ty1 ty2 kco } @@ -1659,7 +1658,7 @@ unify_ty env (CoercionTy co1) (CoercionTy co2) kco CoVarCo cv | not (um_unif env) , not (cv `elemVarEnv` c_subst) -- Not forall-bound - , let (_mult_co, co_l, co_r) = decomposeFunCo (castCoToCo (typeKind (CoercionTy co1)) kco) + , let (_mult_co, co_l, co_r) = decomposeFunCo kco -- Because the coercion is used in a type, it should be safe to -- ignore the multiplicity coercion, _mult_co -- cv :: t1 ~ t2 @@ -1679,7 +1678,7 @@ unify_ty env (TyVarTy tv1) ty2 kco unify_ty env ty1 (TyVarTy tv2) kco | um_unif env -- If unifying, can swap args; but not when matching - = uVarOrFam (umSwapRn env) (TyVarLHS tv2) ty1 (mkSymCastCo (typeKind ty1) kco) + = uVarOrFam (umSwapRn env) (TyVarLHS tv2) ty1 (mkSymCo kco) -- Deal with TyConApps unify_ty env ty1 ty2 kco @@ -1690,7 +1689,7 @@ unify_ty env ty1 ty2 kco | um_unif env , Just (tc,tys) <- mb_sat_fam_app2 - = uVarOrFam (umSwapRn env) (TyFamLHS tc tys) ty1 (mkSymCastCo (typeKind ty1) kco) + = uVarOrFam (umSwapRn env) (TyFamLHS tc tys) ty1 (mkSymCo kco) -- Handle oversaturated type families. Suppose we have -- (F a b) ~ (c d) where F has arity 1 @@ -1761,8 +1760,8 @@ unify_ty_app env ty1 ty1args ty2 ty2args = do { let ki1 = typeKind ty1 ki2 = typeKind ty2 -- See Note [Kind coercions in Unify] - ; unify_ty env ki1 ki2 ReflCastCo - ; unify_ty env ty1 ty2 ReflCastCo -- TODO: simplify following comment? + ; unify_ty env ki1 ki2 (mkNomReflCo liftedTypeKind) + ; unify_ty env ty1 ty2 (mkNomReflCo ki2) -- Very important: 'ki2' not 'ki1' -- See Note [Matching in the presence of casts (2)] ; unify_tys env ty1args ty2args } @@ -1776,7 +1775,7 @@ unify_tys env orig_xs orig_ys go [] [] = return () go (x:xs) (y:ys) -- See Note [Kind coercions in Unify] - = do { unify_ty env x y ReflCastCo -- TODO: simplify following comment? + = do { unify_ty env x y (mkNomReflCo $ typeKind y) -- Very important: 'y' not 'x' -- See Note [Matching in the presence of casts (2)] ; go xs ys } @@ -1785,7 +1784,7 @@ unify_tys env orig_xs orig_ys -- See Note [Polykinded tycon applications] --------------------------------- -uVarOrFam :: UMEnv -> CanEqLHS -> InType -> OutCastCoercion -> UM () +uVarOrFam :: UMEnv -> CanEqLHS -> InType -> OutCoercion -> UM () -- Invariants: (a) If ty1 is a TyFamLHS, then ty2 is NOT a TyVarTy -- (b) both args have had coreView already applied -- Why saturated? See (ATF4) in Note [Apartness and type families] @@ -1812,7 +1811,7 @@ uVarOrFam env ty1 ty2 kco ----------------------------- -- LHS is a type variable -- The sequence of tests is very similar to go_tv - go :: SwapFlag -> UMState -> CanEqLHS -> InType -> OutCastCoercion -> UM () + go :: SwapFlag -> UMState -> CanEqLHS -> InType -> OutCoercion -> UM () go swapped substs lhs@(TyVarLHS tv1) ty2 kco | Just ty1' <- lookupVarEnv (um_tv_env substs) tv1' = -- We already have a substitution for tv1 @@ -1857,7 +1856,7 @@ uVarOrFam env ty1 ty2 kco | um_unif env , NotSwapped <- swapped -- If we have swapped already, don't do so again , Just lhs2 <- canEqLHS_maybe ty2 - = go IsSwapped substs lhs2 (mkTyVarTy tv1) (mkSymCastCo (varType tv1) kco) + = go IsSwapped substs lhs2 (mkTyVarTy tv1) (mkSymCo kco) | occurs_check = maybeApart MARInfinite -- Occurs check | otherwise = surelyApart @@ -1865,7 +1864,7 @@ uVarOrFam env ty1 ty2 kco where tv1' = umRnOccL env tv1 ty2_fvs = tyCoVarsOfType ty2 - rhs = ty2 `mkCastTy` mkSymCastCo (varType tv1') kco + rhs = ty2 `mkCastTy` mkSymCo kco tv1_is_bindable | not (tv1' `elemVarSet` foralld_tvs) -- tv1' is not forall-bound, but tv1 can still differ -- from tv1; see Note [Cloning the template binders] @@ -1929,14 +1928,13 @@ uVarOrFam env ty1 ty2 kco | um_unif env , NotSwapped <- swapped , Just lhs2 <- canEqLHS_maybe ty2 - , let ty1' = mkTyConApp tc1 tys1 - = go IsSwapped substs lhs2 ty1' (mkSymCastCo (typeKind ty1') kco) + = go IsSwapped substs lhs2 (mkTyConApp tc1 tys1) (mkSymCo kco) | otherwise -- See (ATF5) in Note [Apartness and type families] = surelyApart where - rhs = ty2 `mkCastTy` mkSymCastCo (typeKind (mkTyConApp tc1 tys1)) kco + rhs = ty2 `mkCastTy` mkSymCo kco ----------------------------- -- go_fam_fam: LHS and RHS are both saturated type-family applications, @@ -1973,7 +1971,7 @@ uVarOrFam env ty1 ty2 kco | otherwise = return () - rhs1 = mkTyConApp tc tys2 `mkCastTy` mkSymCastCo (typeKind (mkTyConApp tc tys1)) kco -- TODO: correct? + rhs1 = mkTyConApp tc tys2 `mkCastTy` mkSymCo kco rhs2 = mkTyConApp tc tys1 `mkCastTy` kco @@ -2337,10 +2335,9 @@ ty_co_match menv subst ty co lkco rkco noneSet f = allVarSet (not . f) ty_co_match menv subst ty co lkco rkco - | CastTy ty' cco' <- ty + | CastTy ty' co' <- ty -- See Note [Matching in the presence of casts (1)] = let empty_subst = mkEmptySubst (rnInScopeSet (me_env menv)) - co' = castCoToCo (typeKind ty') cco' substed_co_l = substCo (liftEnvSubstLeft empty_subst subst) co' substed_co_r = substCo (liftEnvSubstRight empty_subst subst) co' in @@ -2451,7 +2448,7 @@ ty_co_match menv subst ty co1 lkco rkco -- But transitive coercions are not helpful. Therefore we deal -- with it here: we do recursion on the smaller reflexive coercion, -- while propagating the correct kind coercions. - = let kco' = mkSymCo (castCoToCo (typeKind t) co) + = let kco' = mkSymCo co in ty_co_match menv subst ty (mkReflCo r t) (lkco `mkTransCo` kco') (rkco `mkTransCo` kco') ===================================== compiler/GHC/CoreToIface.hs ===================================== @@ -192,7 +192,7 @@ toIfaceTypeX fr (ForAllTy b t) = IfaceForAllTy (toIfaceForAllBndrX fr b) (toIfaceTypeX (fr `delVarSet` binderVar b) t) toIfaceTypeX fr (FunTy { ft_arg = t1, ft_mult = w, ft_res = t2, ft_af = af }) = IfaceFunTy af (toIfaceTypeX fr w) (toIfaceTypeX fr t1) (toIfaceTypeX fr t2) -toIfaceTypeX fr (CastTy ty co) = IfaceCastTy (toIfaceTypeX fr ty) (toIfaceCastCoercionX fr co) +toIfaceTypeX fr (CastTy ty co) = IfaceCastTy (toIfaceTypeX fr ty) (toIfaceCoercionX fr co) toIfaceTypeX fr (CoercionTy co) = IfaceCoercionTy (toIfaceCoercionX fr co) toIfaceTypeX fr (TyConApp tc tys) @@ -271,12 +271,9 @@ toIfaceTyLit (CharTyLit x) = IfaceCharTyLit x ---------------- toIfaceCastCoercion :: CastCoercion -> IfaceCastCoercion -toIfaceCastCoercion = toIfaceCastCoercionX emptyVarSet - -toIfaceCastCoercionX :: VarSet -> CastCoercion -> IfaceCastCoercion -toIfaceCastCoercionX fr (CCoercion co) = IfaceCCoercion (toIfaceCoercionX fr co) -toIfaceCastCoercionX fr (ZCoercion ty cos) = IfaceZCoercion (toIfaceTypeX fr ty) (map (toIfaceCoercionX fr . CoVarCo) (nonDetEltsUniqSet cos)) -- TODO determinism -toIfaceCastCoercionX _ ReflCastCo = IfaceReflCastCo +toIfaceCastCoercion (CCoercion co) = IfaceCCoercion (toIfaceCoercion co) +toIfaceCastCoercion (ZCoercion ty cos) = IfaceZCoercion (toIfaceType ty) (map (toIfaceCoercion . CoVarCo) (nonDetEltsUniqSet cos)) -- TODO determinism +toIfaceCastCoercion ReflCastCo = IfaceReflCastCo toIfaceCoercion :: Coercion -> IfaceCoercion toIfaceCoercion = toIfaceCoercionX emptyVarSet ===================================== compiler/GHC/HsToCore.hs ===================================== @@ -748,7 +748,7 @@ mkUnsafeCoercePrimPair _old_id old_expr runtimeRep1Ty runtimeRep2Ty (scrut2, scrut2_ty, ab_cv_ty) = unsafe_equality (mkTYPEapp runtimeRep2Ty) - (openAlphaTy `mkCastTyCo` alpha_co) + (openAlphaTy `mkCastTy` alpha_co) openBetaTy -- alpha_co :: TYPE r1 ~# TYPE r2 ===================================== compiler/GHC/Iface/Rename.hs ===================================== @@ -947,7 +947,7 @@ rnIfaceType (IfaceForAllTy tv t) rnIfaceType (IfaceCoercionTy co) = IfaceCoercionTy <$> rnIfaceCo co rnIfaceType (IfaceCastTy ty co) - = IfaceCastTy <$> rnIfaceType ty <*> rnIfaceCastCo co + = IfaceCastTy <$> rnIfaceType ty <*> rnIfaceCo co rnIfaceScaledType :: Rename (IfaceMult, IfaceType) rnIfaceScaledType (m, t) = (,) <$> rnIfaceType m <*> rnIfaceType t ===================================== compiler/GHC/Iface/Syntax.hs ===================================== @@ -2067,7 +2067,7 @@ freeNamesIfType (IfaceTupleTy _ _ ts) = freeNamesIfAppArgs ts freeNamesIfType (IfaceLitTy _) = emptyNameSet freeNamesIfType (IfaceForAllTy tv t) = freeNamesIfVarBndr tv &&& freeNamesIfType t freeNamesIfType (IfaceFunTy _ w s t) = freeNamesIfType s &&& freeNamesIfType t &&& freeNamesIfType w -freeNamesIfType (IfaceCastTy t c) = freeNamesIfType t &&& freeNamesIfCastCoercion c +freeNamesIfType (IfaceCastTy t c) = freeNamesIfType t &&& freeNamesIfCoercion c freeNamesIfType (IfaceCoercionTy c) = freeNamesIfCoercion c freeNamesIfMCoercion :: IfaceMCoercion -> NameSet ===================================== compiler/GHC/Iface/Type.hs ===================================== @@ -190,7 +190,7 @@ data IfaceType | IfaceForAllTy IfaceForAllBndr IfaceType | IfaceTyConApp IfaceTyCon IfaceAppArgs -- Not necessarily saturated -- Includes newtypes, synonyms, tuples - | IfaceCastTy IfaceType IfaceCastCoercion + | IfaceCastTy IfaceType IfaceCoercion | IfaceCoercionTy IfaceCoercion | IfaceTupleTy -- Saturated tuples (unsaturated ones use IfaceTyConApp) @@ -776,16 +776,12 @@ substIfaceType env ty go (IfaceTyConApp tc tys) = IfaceTyConApp tc (substIfaceAppArgs env tys) go (IfaceTupleTy s i tys) = IfaceTupleTy s i (substIfaceAppArgs env tys) go (IfaceForAllTy {}) = pprPanic "substIfaceType" (ppr ty) - go (IfaceCastTy ty co) = IfaceCastTy (go ty) (go_cast_co co) + go (IfaceCastTy ty co) = IfaceCastTy (go ty) (go_co co) go (IfaceCoercionTy co) = IfaceCoercionTy (go_co co) go_mco IfaceMRefl = IfaceMRefl go_mco (IfaceMCo co) = IfaceMCo $ go_co co - go_cast_co IfaceReflCastCo = IfaceReflCastCo - go_cast_co (IfaceCCoercion co) = IfaceCCoercion (go_co co) - go_cast_co (IfaceZCoercion ty cos) = IfaceZCoercion (go ty) (map go_co cos) - go_co (IfaceReflCo ty) = IfaceReflCo (go ty) go_co (IfaceGReflCo r ty mco) = IfaceGReflCo r (go ty) (go_mco mco) go_co (IfaceFunCo r w c1 c2) = IfaceFunCo r (go_co w) (go_co c1) (go_co c2) @@ -2195,9 +2191,6 @@ pprPromotionQuoteI IsPromoted = char '\'' instance Outputable IfaceCoercion where ppr = pprIfaceCoercion -instance Outputable IfaceCastCoercion where - ppr = pprIfaceCastCoercion - instance Binary IfaceTyCon where put_ bh (IfaceTyCon n i) = put_ bh n >> put_ bh i ===================================== compiler/GHC/IfaceToCore.hs ===================================== @@ -1527,7 +1527,7 @@ tcIfaceType = go go (IfaceForAllTy bndr t) = bindIfaceForAllBndr bndr $ \ tv' vis -> ForAllTy (Bndr tv' vis) <$> go t - go (IfaceCastTy ty co) = CastTy <$> go ty <*> tcIfaceCastCoercion co + go (IfaceCastTy ty co) = CastTy <$> go ty <*> tcIfaceCo co go (IfaceCoercionTy co) = CoercionTy <$> tcIfaceCo co tcIfaceTupleTy :: TupleSort -> PromotionFlag -> IfaceAppArgs -> IfL Type ===================================== compiler/GHC/Tc/Gen/App.hs ===================================== @@ -813,7 +813,7 @@ tcInstFun do_ql inst_final (tc_fun, fun_ctxt) fun_sigma rn_args -- NB: kappa is uninstantiated ('go' already checked that) ; kind_co <- unifyKind Nothing liftedTypeKind (tyVarKind kappa) -- unifyKind: see (UQL3) in Note [QuickLook unification] - ; liftZonkM (writeMetaTyVar kappa (mkCastTyCo fun_ty' kind_co)) + ; liftZonkM (writeMetaTyVar kappa (mkCastTy fun_ty' kind_co)) ; let co_wrap = mkWpCastN (mkGReflLeftCo Nominal fun_ty' kind_co) acc' = addArgWrap co_wrap acc @@ -2225,7 +2225,7 @@ qlUnify ty1 ty2 do { co <- unifyKind (Just (TypeThing ty2)) ty2_kind kappa_kind -- unifyKind: see (UQL2) in Note [QuickLook unification] -- and (MIV2) in Note [Monomorphise instantiation variables] - ; let ty2' = mkCastTyCo ty2 co + ; let ty2' = mkCastTy ty2 co ; traceTc "qlUnify:update" $ ppr kappa <+> text ":=" <+> ppr ty2 ; liftZonkM $ writeMetaTyVar kappa ty2' } ===================================== compiler/GHC/Tc/Gen/Bind.hs ===================================== @@ -58,7 +58,7 @@ import GHC.Core.Reduction ( Reduction(..) ) import GHC.Core.Multiplicity import GHC.Core.FamInstEnv( normaliseType ) import GHC.Core.Class ( Class ) -import GHC.Core.Coercion( mkSymCastCo ) +import GHC.Core.Coercion( mkSymCo ) import GHC.Core.Type (mkStrLitTy, mkCastTy) import GHC.Core.TyCo.Ppr( pprTyVars ) import GHC.Core.TyCo.Tidy( tidyOpenTypeX ) @@ -1093,7 +1093,7 @@ chooseInferredQuantifiers residual inferred_theta tau_tvs qtvs -- So, to make the kinds work out, we reverse the cast here. Just (wc_var, wc_co) -> liftZonkM $ writeMetaTyVar wc_var (mkConstraintTupleTy diff_theta - `mkCastTy` mkSymCastCo (varType wc_var) wc_co) + `mkCastTy` mkSymCo wc_co) Nothing -> pprPanic "chooseInferredQuantifiers 1" (ppr wc_var_ty) ; traceTc "completeTheta" $ ===================================== compiler/GHC/Tc/Gen/HsType.hs ===================================== @@ -1696,7 +1696,7 @@ tcInferTyApps_nosat mode orig_hs_ty fun orig_hs_args do { let arrows_needed = n_initial_val_args all_args ; co <- matchExpectedFunKind (HsTypeRnThing $ unLoc hs_ty) arrows_needed substed_fun_ki - ; fun' <- liftZonkM $ zonkTcType (fun `mkCastTyCo` co) + ; fun' <- liftZonkM $ zonkTcType (fun `mkCastTy` co) -- This zonk is essential, to expose the fruits -- of matchExpectedFunKind to the 'go' loop @@ -1963,7 +1963,7 @@ checkExpectedKind hs_ty ty act_kind exp_kind ; traceTc "checkExpectedKind" (vcat [ ppr act_kind , ppr exp_kind , ppr co_k ]) - ; return (res_ty `mkCastTyCo` co_k) } } + ; return (res_ty `mkCastTy` co_k) } } where -- We need to make sure that both kinds have the same number of implicit -- foralls and constraints out front. If the actual kind has more, instantiate @@ -1986,7 +1986,7 @@ checkExpKind _rn_ty ty ki (Infer cell) = do -- NB: do not instantiate. -- See Note [Do not always instantiate eagerly in types] co <- fillInferResultNoInst ki cell - pure (ty `mkCastTyCo` co) + pure (ty `mkCastTy` co) --------------------------- ===================================== compiler/GHC/Tc/Solver/Equality.hs ===================================== @@ -359,11 +359,11 @@ can_eq_nc _rewritten rdr_env envs ev eq_rel ty1 ps_ty1 ty2 ps_ty2 can_eq_nc rewritten rdr_env envs ev eq_rel (CastTy ty1 co1) _ ty2 ps_ty2 | isNothing (canEqLHS_maybe ty2) = -- See (EIK3) in Note [Equalities with heterogeneous kinds] - canEqCast rewritten rdr_env envs ev eq_rel NotSwapped ty1 (castCoToCo (typeKind ty1) co1) ty2 ps_ty2 + canEqCast rewritten rdr_env envs ev eq_rel NotSwapped ty1 co1 ty2 ps_ty2 can_eq_nc rewritten rdr_env envs ev eq_rel ty1 ps_ty1 (CastTy ty2 co2) _ | isNothing (canEqLHS_maybe ty1) = -- See (EIK3) in Note [Equalities with heterogeneous kinds] - canEqCast rewritten rdr_env envs ev eq_rel IsSwapped ty2 (castCoToCo (typeKind ty2) co2) ty1 ps_ty1 + canEqCast rewritten rdr_env envs ev eq_rel IsSwapped ty2 co2 ty1 ps_ty1 ---------------------- -- Otherwise try to decompose @@ -522,7 +522,7 @@ can_eq_nc_forall ev eq_rel s1 s2 (substTy subst2 (tyVarKind tv2)) ; let subst2' = extendTvSubstAndInScope subst2 tv2 - (mkCastTyCo (mkTyVarTy skol_tv) kind_co) + (mkCastTy (mkTyVarTy skol_tv) kind_co) -- skol_tv is already in the in-scope set, but the -- free vars of kind_co are not; hence "...AndInScope" ; co <- go uenv skol_tvs subst2' bndrs1 bndrs2 @@ -1741,7 +1741,7 @@ canEqCanLHSHetero ev eq_rel swapped lhs1 ps_xi1 ki1 xi2 ps_xi2 ki2 -- kind_co :: ki2 ~N ki1 lhs_redn = mkReflRedn role ps_xi1 rhs_redn = mkGReflRightRedn role xi2 kind_co - new_xi2 = mkCastTyCo ps_xi2 kind_co + new_xi2 = mkCastTy ps_xi2 kind_co canEqCanLHSHomo :: CtEvidence -- lhs ~ rhs -- or, if swapped: rhs ~ lhs @@ -1753,14 +1753,14 @@ canEqCanLHSHomo :: CtEvidence -- lhs ~ rhs canEqCanLHSHomo ev eq_rel swapped lhs1 ps_xi1 xi2 ps_xi2 | (xi2', mco) <- split_cast_ty xi2 , Just lhs2 <- canEqLHS_maybe xi2' - = canEqCanLHS2 ev eq_rel swapped lhs1 ps_xi1 lhs2 (ps_xi2 `mkCastTy` mkSymCastCo (typeKind xi2') mco) mco + = canEqCanLHS2 ev eq_rel swapped lhs1 ps_xi1 lhs2 (ps_xi2 `mkCastTyMCo` mkSymMCo mco) mco | otherwise = canEqCanLHSFinish ev eq_rel swapped lhs1 ps_xi2 where - split_cast_ty (CastTy ty co) = (ty, co) - split_cast_ty other = (other, ReflCastCo) + split_cast_ty (CastTy ty co) = (ty, MCo co) + split_cast_ty other = (other, MRefl) -- This function deals with the case that both LHS and RHS are potential -- CanEqLHSs. @@ -1771,7 +1771,7 @@ canEqCanLHS2 :: CtEvidence -- lhs ~ (rhs |> mco) -> TcType -- pretty lhs -> CanEqLHS -- rhs -> TcType -- pretty rhs - -> CastCoercion -- :: kind(rhs) ~N kind(lhs) + -> MCoercion -- :: kind(rhs) ~N kind(lhs) -> TcS (StopOrContinue (Either IrredCt EqCt)) canEqCanLHS2 ev eq_rel swapped lhs1 ps_xi1 lhs2 ps_xi2 mco | lhs1 `eqCanEqLHS` lhs2 @@ -1823,13 +1823,13 @@ canEqCanLHS2 ev eq_rel swapped lhs1 ps_xi1 lhs2 ps_xi2 mco then finish_with_swapping else finish_without_swapping } where - sym_mco = mkSymCastCo (canEqLHSKind lhs2) mco + sym_mco = mkSymMCo mco role = eqRelRole eq_rel lhs1_ty = canEqLHSType lhs1 lhs2_ty = canEqLHSType lhs2 finish_without_swapping - = canEqCanLHSFinish ev eq_rel swapped lhs1 (ps_xi2 `mkCastTy` mco) + = canEqCanLHSFinish ev eq_rel swapped lhs1 (ps_xi2 `mkCastTyMCo` mco) -- Swapping. We have ev : lhs1 ~ lhs2 |> co -- We swap to new_ev : lhs2 ~ lhs1 |> sym co @@ -1840,7 +1840,7 @@ canEqCanLHS2 ev eq_rel swapped lhs1 ps_xi1 lhs2 ps_xi2 mco = do { let lhs1_redn = mkGReflRightMRedn role lhs1_ty sym_mco lhs2_redn = mkGReflLeftMRedn role lhs2_ty mco ; new_ev <-rewriteEqEvidence ev swapped lhs1_redn lhs2_redn emptyCoHoleSet - ; canEqCanLHSFinish new_ev eq_rel IsSwapped lhs2 (ps_xi1 `mkCastTy` sym_mco) } + ; canEqCanLHSFinish new_ev eq_rel IsSwapped lhs2 (ps_xi1 `mkCastTyMCo` sym_mco) } put_tyvar_on_lhs = isWanted ev && eq_rel == NomEq -- See Note [Orienting TyVarLHS/TyFamLHS] ===================================== compiler/GHC/Tc/Solver/Rewrite.hs ===================================== @@ -561,9 +561,8 @@ rewrite_one ty@(ForAllTy {}) ; redn <- rewrite_one rho ; return $ mkHomoForAllRedn bndrs redn } -rewrite_one (CastTy ty cco) +rewrite_one (CastTy ty g) = do { redn <- rewrite_one ty - ; let g = castCoToCo (typeKind ty) cco ; g' <- rewrite_co g ; role <- getRole ; return $ mkCastRedn1 role ty g' redn } ===================================== compiler/GHC/Tc/TyCl/Utils.hs ===================================== @@ -37,7 +37,7 @@ import GHC.Builtin.Uniques ( mkBuiltinUnique ) import GHC.Hs -import GHC.Core.TyCo.Rep( Type(..), Coercion(..), MCoercion(..), CastCoercion(..) ) +import GHC.Core.TyCo.Rep( Type(..), Coercion(..), MCoercion(..) ) import GHC.Core.Multiplicity import GHC.Core.Predicate import GHC.Core.Make( rEC_SEL_ERROR_ID ) @@ -101,7 +101,7 @@ synonymTyConsOfType ty go (AppTy a b) = go a `plusNameEnv` go b go (FunTy _ w a b) = go w `plusNameEnv` go a `plusNameEnv` go b go (ForAllTy _ ty) = go ty - go (CastTy ty co) = go ty `plusNameEnv` go_cast_co co + go (CastTy ty co) = go ty `plusNameEnv` go_co co go (CoercionTy co) = go_co co -- Note [TyCon cycles through coercions?!] @@ -128,10 +128,6 @@ synonymTyConsOfType ty go_mco MRefl = emptyNameEnv go_mco (MCo co) = go_co co - go_cast_co ReflCastCo = emptyNameEnv - go_cast_co (CCoercion co) = go_co co - go_cast_co (ZCoercion ty _) = go ty - go_co (Refl ty) = go ty go_co (GRefl _ ty mco) = go ty `plusNameEnv` go_mco mco go_co (TyConAppCo _ tc cs) = go_tc tc `plusNameEnv` go_co_s cs ===================================== compiler/GHC/Tc/Utils/Instantiate.hs ===================================== @@ -331,7 +331,7 @@ instTyVarsWith orig tvs tys = go (extendTvSubstAndInScope subst tv ty) tvs tys | otherwise = do { co <- emitWantedEq orig KindLevel Nominal ty_kind tv_kind - ; go (extendTvSubstAndInScope subst tv (ty `mkCastTyCo` co)) tvs tys } + ; go (extendTvSubstAndInScope subst tv (ty `mkCastTy` co)) tvs tys } where tv_kind = substTy subst (tyVarKind tv) ty_kind = typeKind ty ===================================== compiler/GHC/Tc/Utils/TcMType.hs ===================================== @@ -1435,7 +1435,7 @@ collect_cand_qtvs orig_ty is_dep cur_lvl bound dvs ty go dv (FunTy _ w arg res) = foldlM go dv [w, arg, res] go dv (LitTy {}) = return dv go dv (CastTy ty co) = do { dv1 <- go dv ty - ; collect_cand_qtvs_cast_co orig_ty cur_lvl bound dv1 co } + ; collect_cand_qtvs_co orig_ty cur_lvl bound dv1 co } go dv (CoercionTy co) = collect_cand_qtvs_co orig_ty cur_lvl bound dv co go dv (TyVarTy tv) @@ -1516,18 +1516,6 @@ collect_cand_qtvs orig_ty is_dep cur_lvl bound dvs ty -- See Note [Recurring into kinds for candidateQTyVars] ; collect_cand_qtvs orig_ty True cur_lvl bound dv' tv_kind } } -collect_cand_qtvs_cast_co :: TcType -- original type at top of recursion; for errors - -> TcLevel - -> VarSet -- bound variables - -> CandidatesQTvs -> CastCoercion - -> TcM CandidatesQTvs -collect_cand_qtvs_cast_co orig_ty cur_lvl bound dv cco = case cco of - ReflCastCo -> return dv - CCoercion co -> collect_cand_qtvs_co orig_ty cur_lvl bound dv co - ZCoercion ty cos -> do { dv1 <- collect_cand_qtvs orig_ty True cur_lvl bound dv ty - ; foldM (\dv cv -> collect_cand_qtvs_co orig_ty cur_lvl bound dv (CoVarCo cv)) dv1 (nonDetEltsUniqSet cos) -- TODO - } - collect_cand_qtvs_co :: TcType -- original type at top of recursion; for errors -> TcLevel -> VarSet -- bound variables ===================================== compiler/GHC/Tc/Utils/Unify.hs ===================================== @@ -2696,11 +2696,11 @@ uType env@(UE { u_role = role }) orig_ty1 orig_ty2 -- didn't do it this way, and then the unification above was deferred. go (CastTy t1 co1) t2 = do { co_tys <- uType env t1 t2 - ; return (mkCoherenceLeftCo role t1 (castCoToCo (typeKind t1) co1) co_tys) } + ; return (mkCoherenceLeftCo role t1 co1 co_tys) } go t1 (CastTy t2 co2) = do { co_tys <- uType env t1 t2 - ; return (mkCoherenceRightCo role t2 (castCoToCo (typeKind t2) co2) co_tys) } + ; return (mkCoherenceRightCo role t2 co2 co_tys) } -- Variables; go for uUnfilledVar -- Note that we pass in *original* (before synonym expansion), @@ -3484,7 +3484,7 @@ simpleUnifyCheck caller given_eq_lvl lhs_tv rhs where lhs_info = metaTyVarInfo lhs_tv - !(occ_in_ty, occ_in_co, occ_in_cast_co) = mkOccFolders (tyVarName lhs_tv) + !(occ_in_ty, occ_in_co) = mkOccFolders (tyVarName lhs_tv) lhs_tv_lvl = tcTyVarLevel lhs_tv lhs_tv_is_concrete = isConcreteTyVar lhs_tv @@ -3525,17 +3525,17 @@ simpleUnifyCheck caller given_eq_lvl lhs_tv rhs | otherwise = False rhs_is_ok (AppTy t1 t2) = rhs_is_ok t1 && rhs_is_ok t2 - rhs_is_ok (CastTy ty co) = not (occ_in_cast_co co) && rhs_is_ok ty + rhs_is_ok (CastTy ty co) = not (occ_in_co co) && rhs_is_ok ty rhs_is_ok (CoercionTy co) = not (occ_in_co co) rhs_is_ok (LitTy {}) = True -mkOccFolders :: Name -> (TcType -> Bool, TcCoercion -> Bool, TcCastCoercion -> Bool) +mkOccFolders :: Name -> (TcType -> Bool, TcCoercion -> Bool) -- These functions return True -- * if lhs_tv occurs (incl deeply, in the kind of variable) -- * if there is a coercion hole -- No expansion of type synonyms -mkOccFolders lhs_tv = (getAny . check_ty, getAny . check_co, getAny . check_cast_co) +mkOccFolders lhs_tv = (getAny . check_ty, getAny . check_co) where !(check_ty, _, check_co, _) = foldTyCo occ_folder emptyVarSet occ_folder = TyCoFolder { tcf_view = noView -- Don't expand synonyms @@ -3549,11 +3549,6 @@ mkOccFolders lhs_tv = (getAny . check_ty, getAny . check_co, getAny . check_cast do_bndr is tcv _faf = extendVarSet is tcv do_hole _is _hole = DM.Any True -- Reject coercion holes - check_cast_co ReflCastCo = Any False - check_cast_co (CCoercion co) = check_co co - check_cast_co (ZCoercion _ty _cos) = error "AMG TODO check_cast_co" - - {- ********************************************************************* * * Equality invariant checking @@ -4149,7 +4144,7 @@ check_ty_eq_rhs flags ty ; return (mkAppRedn <$> fun_res <*> arg_res) } CastTy ty co -> do { ty_res <- check_ty_eq_rhs flags ty - ; co_res <- checkCo flags (castCoToCo (typeKind ty) co) + ; co_res <- checkCo flags co ; return (mkCastRedn1 Nominal ty <$> co_res <*> ty_res) } CoercionTy co -> do { co_res <- checkCo flags co @@ -4545,7 +4540,7 @@ simpleOccursCheck (OC_Check lhs_tv occ_prob) occ_tv | otherwise = TyVarCheck_Success where - (check_kind, _, _) = mkOccFolders lhs_tv + (check_kind, _) = mkOccFolders lhs_tv ------------------------- tyVarLevelCheck :: LevelCheck m -> TcTyVar -> TyVarCheckResult m View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/bc458a0cada87075d63ab516123143… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/bc458a0cada87075d63ab516123143… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc] Pushed new branch wip/dcoutts/issue-27105-stopTicker-2
by Duncan Coutts (＠dcoutts) 06 Jun '26

06 Jun '26

Duncan Coutts pushed new branch wip/dcoutts/issue-27105-stopTicker-2 at Glasgow Haskell Compiler / GHC -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/dcoutts/issue-27105-stopTicke… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/amg/T27329] Mark various language extension flags as deprecated (see #27329)
by Adam Gundry (＠adamgundry) 06 Jun '26

06 Jun '26

Adam Gundry pushed to branch wip/amg/T27329 at Glasgow Haskell Compiler / GHC Commits: 51328e56 by Adam Gundry at 2026-06-05T22:09:03+02:00 Mark various language extension flags as deprecated (see #27329) The following language extensions are now deprecated: - AlternativeLayoutRule - AlternativeLayoutRuleTransitional - ParallelArrays - PolymorphicComponents - Rank2Types In addition, the warning `-Walternative-layout-rule-transitional` has been marked as deprecated, as it is emitted only under the deprecated extension `XAlternativeLayoutRuleTransitional`. - - - - - 47 changed files: - compiler/GHC/Driver/Flags.hs - compiler/GHC/Driver/Session.hs - compiler/GHC/Tc/Types/Rank.hs - docs/users_guide/expected-undocumented-flags.txt - docs/users_guide/exts/rank_polymorphism.rst - docs/users_guide/exts/static_pointers.rst - libraries/ghc-internal/ghc-internal.cabal.in - testsuite/tests/backpack/should_compile/T13149.bkp - testsuite/tests/determinism/determ017/A.hs - testsuite/tests/ghci/scripts/T12005.script - testsuite/tests/haddock/perf/Fold.hs - testsuite/tests/indexed-types/should_fail/T7354.hs - testsuite/tests/layout/layout001.stdout - testsuite/tests/layout/layout002.stdout - testsuite/tests/layout/layout003.stdout - testsuite/tests/layout/layout004.stdout - testsuite/tests/layout/layout005.stdout - testsuite/tests/layout/layout006.stdout - testsuite/tests/layout/layout007.stdout - testsuite/tests/layout/layout008.stdout - testsuite/tests/layout/layout009.stdout - testsuite/tests/linear/should_compile/T1735Min.hs - testsuite/tests/parser/should_fail/T8431.stderr - testsuite/tests/parser/should_fail/readFail038.stderr - testsuite/tests/perf/compiler/T3064.hs - testsuite/tests/polykinds/T7594.hs - testsuite/tests/programs/thurston-modular-arith/Main.hs - testsuite/tests/rts/ipe/IpeStats/Fold.hs - testsuite/tests/simplCore/should_compile/T11562.hs - testsuite/tests/simplCore/should_run/T3591.hs - testsuite/tests/typecheck/should_compile/DeepSubsumption02.hs - testsuite/tests/typecheck/should_compile/T12507.hs - testsuite/tests/typecheck/should_compile/T13951.hs - testsuite/tests/typecheck/should_compile/T18920.hs - testsuite/tests/typecheck/should_compile/T2595.hs - testsuite/tests/typecheck/should_compile/T7541.hs - testsuite/tests/typecheck/should_fail/T6069.stderr - testsuite/tests/typecheck/should_fail/T7368a.hs - testsuite/tests/typecheck/should_run/T1735_Help/Basics.hs - testsuite/tests/typecheck/should_run/T3731-short.hs - testsuite/tests/typecheck/should_run/T3731.hs - testsuite/tests/typecheck/should_run/church.hs - testsuite/tests/typecheck/should_run/tcrun008.hs - testsuite/tests/typecheck/should_run/tcrun017.hs - testsuite/tests/typecheck/should_run/tcrun026.hs - testsuite/tests/typecheck/should_run/tcrun035.hs - testsuite/tests/typecheck/should_run/tcrun036.hs The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/51328e56c3feb0fb2a83312926d721d… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/51328e56c3feb0fb2a83312926d721d… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc] Pushed new branch wip/amg/T27329
by Adam Gundry (＠adamgundry) 06 Jun '26

06 Jun '26

Adam Gundry pushed new branch wip/amg/T27329 at Glasgow Haskell Compiler / GHC -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/amg/T27329 You're receiving this email because of your account on gitlab.haskell.org.

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