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* Bump ghc-prim version to 0.7.0Ryan Scott2020-07-021-1/+1
| | | | Fixes #18279. Bumps the `text` submodule.
* Update testsuiteSylvain Henry2020-06-171-2/+1
| | | | | | | | | | | | | | * support detection of slow ghc-bignum backend (to replace the detection of integer-simple use). There are still some test cases that the native backend doesn't handle efficiently enough. * remove tests for GMP only functions that have been removed from ghc-bignum * fix test results showing dependent packages (e.g. integer-gmp) or showing suggested instances * fix test using Integer/Natural API or showing internal names
* Simple subsumptionwip/T17775Simon Peyton Jones2020-06-051-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch simplifies GHC to use simple subsumption. Ticket #17775 Implements GHC proposal #287 https://github.com/ghc-proposals/ghc-proposals/blob/master/ proposals/0287-simplify-subsumption.rst All the motivation is described there; I will not repeat it here. The implementation payload: * tcSubType and friends become noticably simpler, because it no longer uses eta-expansion when checking subsumption. * No deeplyInstantiate or deeplySkolemise That in turn means that some tests fail, by design; they can all be fixed by eta expansion. There is a list of such changes below. Implementing the patch led me into a variety of sticky corners, so the patch includes several othe changes, some quite significant: * I made String wired-in, so that "foo" :: String rather than "foo" :: [Char] This improves error messages, and fixes #15679 * The pattern match checker relies on knowing about in-scope equality constraints, andd adds them to the desugarer's environment using addTyCsDs. But the co_fn in a FunBind was missed, and for some reason simple-subsumption ends up with dictionaries there. So I added a call to addTyCsDs. This is really part of #18049. * I moved the ic_telescope field out of Implication and into ForAllSkol instead. This is a nice win; just expresses the code much better. * There was a bug in GHC.Tc.TyCl.Instance.tcDataFamInstHeader. We called checkDataKindSig inside tc_kind_sig, /before/ solveEqualities and zonking. Obviously wrong, easily fixed. * solveLocalEqualitiesX: there was a whole mess in here, around failing fast enough. I discovered a bad latent bug where we could successfully kind-check a type signature, and use it, but have unsolved constraints that could fill in coercion holes in that signature -- aargh. It's all explained in Note [Failure in local type signatures] in GHC.Tc.Solver. Much better now. * I fixed a serious bug in anonymous type holes. IN f :: Int -> (forall a. a -> _) -> Int that "_" should be a unification variable at the /outer/ level; it cannot be instantiated to 'a'. This was plain wrong. New fields mode_lvl and mode_holes in TcTyMode, and auxiliary data type GHC.Tc.Gen.HsType.HoleMode. This fixes #16292, but makes no progress towards the more ambitious #16082 * I got sucked into an enormous refactoring of the reporting of equality errors in GHC.Tc.Errors, especially in mkEqErr1 mkTyVarEqErr misMatchMsg misMatchMsgOrCND In particular, the very tricky mkExpectedActualMsg function is gone. It took me a full day. But the result is far easier to understand. (Still not easy!) This led to various minor improvements in error output, and an enormous number of test-case error wibbles. One particular point: for occurs-check errors I now just say Can't match 'a' against '[a]' rather than using the intimidating language of "occurs check". * Pretty-printing AbsBinds Tests review * Eta expansions T11305: one eta expansion T12082: one eta expansion (undefined) T13585a: one eta expansion T3102: one eta expansion T3692: two eta expansions (tricky) T2239: two eta expansions T16473: one eta determ004: two eta expansions (undefined) annfail06: two eta (undefined) T17923: four eta expansions (a strange program indeed!) tcrun035: one eta expansion * Ambiguity check at higher rank. Now that we have simple subsumption, a type like f :: (forall a. Eq a => Int) -> Int is no longer ambiguous, because we could write g :: (forall a. Eq a => Int) -> Int g = f and it'd typecheck just fine. But f's type is a bit suspicious, and we might want to consider making the ambiguity check do a check on each sub-term. Meanwhile, these tests are accepted, whereas they were previously rejected as ambiguous: T7220a T15438 T10503 T9222 * Some more interesting error message wibbles T13381: Fine: one error (Int ~ Exp Int) rather than two (Int ~ Exp Int, Exp Int ~ Int) T9834: Small change in error (improvement) T10619: Improved T2414: Small change, due to order of unification, fine T2534: A very simple case in which a change of unification order means we get tow unsolved constraints instead of one tc211: bizarre impredicative tests; just accept this for now Updates Cabal and haddock submodules. Metric Increase: T12150 T12234 T5837 haddock.base Metric Decrease: haddock.compiler haddock.Cabal haddock.base Merge note: This appears to break the `UnliftedNewtypesDifficultUnification` test. It has been marked as broken in the interest of merging. (cherry picked from commit 66b7b195cb3dce93ed5078b80bf568efae904cc5)
* Always display inferred variables using bracesKrzysztof Gogolewski2020-02-121-1/+1
| | | | | | | | | | | | | We now always show "forall {a}. T" for inferred variables, previously this was controlled by -fprint-explicit-foralls. This implements part 1 of https://github.com/ghc-proposals/ghc-proposals/pull/179. Part of GHC ticket #16320. Furthermore, when printing a levity restriction error, we now display the HsWrap of the expression. This lets users see the full elaboration with -fprint-typechecker-elaboration (see also #17670)
* Bump ghc-prim's version where neededAlexandre2019-04-011-1/+1
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* base: Remove `Monad(fail)` method and reexport `MonadFail(fail)` insteadHerbert Valerio Riedel2019-03-221-1/+1
| | | | | | As per https://prime.haskell.org/wiki/Libraries/Proposals/MonadFail Coauthored-by: Ben Gamari <ben@well-typed.com>
* Visible kind applicationmynguyen2019-01-031-1/+1
| | | | | | | | | | | | | | | | | | | | | | | Summary: This patch implements visible kind application (GHC Proposal 15/#12045), as well as #15360 and #15362. It also refactors unnamed wildcard handling, and requires that type equations in type families in Template Haskell be written with full type on lhs. PartialTypeSignatures are on and warnings are off automatically with visible kind application, just like in term-level. There are a few remaining issues with this patch, as documented in ticket #16082. Includes a submodule update for Haddock. Test Plan: Tests T12045a/b/c/TH1/TH2, T15362, T15592a Reviewers: simonpj, goldfire, bgamari, alanz, RyanGlScott, Iceland_jack Subscribers: ningning, Iceland_jack, RyanGlScott, int-index, rwbarton, mpickering, carter GHC Trac Issues: `#12045`, `#15362`, `#15592`, `#15788`, `#15793`, `#15795`, `#15797`, `#15799`, `#15801`, `#15807`, `#15816` Differential Revision: https://phabricator.haskell.org/D5229
* Improve output from -ddump-typesSimon Peyton Jones2018-10-241-2/+0
| | | | | | | | | | | | | | | | | | This patch makes a number of improvements to the output generated by -ddump-types * Prints data constructor separately * Omits empty chunks of output I was driven initially by the unhelpful existing output for data constructors, but ended up doing some refactoring. Lots of error message wibbles, but nothing significant. Certainly no change in user behaviour. (NB: It is just possible that I have failed to cleanly separate this patch from the next one, about isPredTy and friends.)
* ghc-prim: Bump versionBen Gamari2018-05-201-1/+1
| | | | | | | | | | | | | unpackClosure#'s behavior and type has changed. This caused a CPP guard in the new ghc-heap package to fail when bootstrapping with GHC 8.4. Test Plan: Validate bootstrapping with GHC 8.4 Reviewers: RyanGlScott Subscribers: rwbarton, thomie, carter Differential Revision: https://phabricator.haskell.org/D4716
* Add 'addWordC#' PrimOpSebastian Graf2018-05-051-1/+1
| | | | | | | | | | | | | | | | | | | This is mostly for congruence with 'subWordC#' and '{add,sub}IntC#'. I found 'plusWord2#' while implementing this, which both lacks documentation and has a slightly different specification than 'addWordC#', which means the generic implementation is unnecessarily complex. While I was at it, I also added lacking meta-information on PrimOps and refactored 'subWordC#'s generic implementation to be branchless. Reviewers: bgamari, simonmar, jrtc27, dfeuer Reviewed By: bgamari, dfeuer Subscribers: dfeuer, thomie, carter Differential Revision: https://phabricator.haskell.org/D4592
* Bump base to version 4.12.0.0Ryan Scott2018-04-191-1/+1
| | | | | | | | | | | | | | | | Summary: Bumps several submodules. Test Plan: ./validate Reviewers: hvr, bgamari Reviewed By: bgamari Subscribers: thomie, carter GHC Trac Issues: #15018 Differential Revision: https://phabricator.haskell.org/D4609
* Bump version numbers: base-4.11.1.0, integer-gmp-1.0.2.0Ryan Scott2018-04-131-2/+2
| | | | | | | | | | | | | | | | | | | | | This takes care of bumping the `base` and `integer-gmp` minor version numbers in anticipation of a GHC 8.4.2 release. While I was in town, I also filled in a `@since TODO` Haddock annotation for `powModSecInteger` in `integer-gmp` with `1.0.2.0`, and updated the changelog accordingly. Test Plan: ./validate Reviewers: hvr, goldfire, bgamari Reviewed By: bgamari Subscribers: thomie, carter GHC Trac Issues: #15025 Differential Revision: https://phabricator.haskell.org/D4586
* Bump ghc-prim to 0.5.2.0 and update changelogHerbert Valerio Riedel2017-10-171-1/+1
| | | | | | | This is prompted by the addition of `compareByteArrays#` in e3ba26f8b49700b41ff4672f3f7f6a4e453acdcc NOTE: We may switch to synchronise `ghc-prim` with GHC's version at some point
* Bump base to 4.11.0.0Ben Gamari2017-09-211-2/+2
| | | | | | | | | | Bumps numerous submodules. Reviewers: austin, hvr Subscribers: rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D3974
* ghc-prim: Bump versionBen Gamari2017-07-231-1/+1
| | | | (cherry picked from commit 8c5405f63c2de0c445ec171aab63c35786544b9e)
* base: Bump version to 4.10.0.0Ben Gamari2016-12-151-1/+1
| | | | Updates a number of submodules.
* Testsuite: remove Windows CR [skip ci]Thomas Miedema2016-06-201-7/+7
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* Improve typechecking of let-bindingsSimon Peyton Jones2016-06-131-7/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This major commit was initially triggered by #11339, but it spiraled into a major review of the way in which type signatures for bindings are handled, especially partial type signatures. On the way I fixed a number of other bugs, namely #12069 #12033 #11700 #11339 #11670 The main change is that I completely reorganised the way in which type signatures in bindings are handled. The new story is in TcSigs Note [Overview of type signatures]. Some specific: * Changes in the data types for signatures in TcRnTypes: TcIdSigInfo and new TcIdSigInst * New module TcSigs deals with typechecking type signatures and pragmas. It contains code mostly moved from TcBinds, which is already too big * HsTypes: I swapped the nesting of HsWildCardBndrs and HsImplicitBndsrs, so that the wildcards are on the oustide not the insidde in a LHsSigWcType. This is just a matter of convenient, nothing deep. There are a host of other changes as knock-on effects, and it all took FAR longer than I anticipated :-). But it is a significant improvement, I think. Lots of error messages changed slightly, some just variants but some modest improvements. New tests * typecheck/should_compile * SigTyVars: a scoped-tyvar test * ExPat, ExPatFail: existential pattern bindings * T12069 * T11700 * T11339 * partial-sigs/should_compile * T12033 * T11339a * T11670 One thing to check: * Small change to output from ghc-api/landmines. Need to check with Alan Zimmerman
* Testsuite: accept output without Windows line endings (#11631)Thomas Miedema2016-02-231-7/+7
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* Bump ghc-prim version to 0.5.0.0 (closes #11043)Herbert Valerio Riedel2015-11-011-1/+1
| | | | | | | | | | | This also needs to update the primitive/vector submodules in order to relax upper bounds on ghc-prim. Like in f8ba4b55cc3a061458f5cfabf17de96128defbbb, a mass-rewrite in testsuite/ via sed -i s,ghc-prim-0.4.0.0,ghc-prim-0.5.0.0,g $(git grep -Fl 'ghc-prim-0.4.0.0') was performed.
* Bump `base` version to 4.9.0.0 (closes #11026)Herbert Valerio Riedel2015-11-011-1/+1
| | | | | | | | | | | This also relaxes a few upper bounds on base in the ghc.git repo; This required a mass-rewrite in testsuite/ sed -i s,base-4.8.2.0,base-4.9.0.0,g $(git grep -Fl 'base-4.8.2.0') because it turns out the testsuite is still sensitive to package version changes.
* Tidy up and refactor wildcard handlingSimon Peyton Jones2015-08-051-7/+7
| | | | | | | | | | | | | | | | | | When examining #10615, I found the wildcard handling hard to understand. This patch refactors quite a bit, but with no real change in behaviour. * Split out TcIdSigInfo from TcSigInfo, as a separate type, like TcPatSynInfo. * Make TcIdSigInfo express more invariants by pushing the wildard info into TcIdSigBndr * Remove all special treatment of unification variables that arise from wildcards; so the TauTv of TcType.MetaInfo loses its Bool argument. A ton of konck on changes. The result is significantly simpler, I think.
* Bump base version to 4.8.2.0Herbert Valerio Riedel2015-04-251-1/+1
| | | | | | This is needed because GHC 7.10.2 requires a minor version bump to base-4.8.1.0 Several test outputs needed base-4.8.1.0 replaced by base-4.8.2.0
* Minor bump `base` version to 4.8.1.0Herbert Valerio Riedel2015-03-231-1/+1
| | | | | We've accumulated enough to justify a minor version bump to 4.8.1.0, but not enough to justify a major version bump yet as far as I can see.
* Bump ghc-prim to 0.4.0.0Herbert Valerio Riedel2015-03-201-1/+1
| | | | | | | | | | | | This major version bump was made necessary by f44333eae7bc7dc7b6003b75874a02445f6b633b which changed the type signatures of prefetch primops, as well as other changes such as 051d694fc978ad28ac3043d296cafddd3c2a7050 turning `Any` into an abstract closed type family. Reviewed By: ekmett Differential Revision: https://phabricator.haskell.org/D743
* Implement Partial Type SignaturesThomas Winant2014-11-281-0/+7
Summary: Add support for Partial Type Signatures, i.e. holes in types, see: https://ghc.haskell.org/trac/ghc/wiki/PartialTypeSignatures This requires an update to the Haddock submodule. Test Plan: validate Reviewers: austin, goldfire, simonpj Reviewed By: simonpj Subscribers: thomie, Iceland_jack, dominique.devriese, simonmar, carter, goldfire Differential Revision: https://phabricator.haskell.org/D168 GHC Trac Issues: #9478
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