1. 29 Jun, 2018 1 commit
  2. 24 Jun, 2018 1 commit
  3. 19 Jun, 2018 1 commit
  4. 14 Jun, 2018 1 commit
    • Vladislav Zavialov's avatar
      Embrace -XTypeInType, add -XStarIsType · d650729f
      Vladislav Zavialov authored
      Summary:
      Implement the "Embrace Type :: Type" GHC proposal,
      .../ghc-proposals/blob/master/proposals/0020-no-type-in-type.rst
      
      GHC 8.0 included a major change to GHC's type system: the Type :: Type
      axiom. Though casual users were protected from this by hiding its
      features behind the -XTypeInType extension, all programs written in GHC
      8+ have the axiom behind the scenes. In order to preserve backward
      compatibility, various legacy features were left unchanged. For example,
      with -XDataKinds but not -XTypeInType, GADTs could not be used in types.
      Now these restrictions are lifted and -XTypeInType becomes a redundant
      flag that will be eventually deprecated.
      
      * Incorporate the features currently in -XTypeInType into the
        -XPolyKinds and -XDataKinds extensions.
      * Introduce a new extension -XStarIsType to control how to parse * in
        code and whether to print it in error messages.
      
      Test Plan: Validate
      
      Reviewers: goldfire, hvr, bgamari, alanz, simonpj
      
      Reviewed By: goldfire, simonpj
      
      Subscribers: rwbarton, thomie, mpickering, carter
      
      GHC Trac Issues: #15195
      
      Differential Revision: https://phabricator.haskell.org/D4748
      d650729f
  5. 07 Jun, 2018 1 commit
    • Alec Theriault's avatar
      Move 'HsBangTy' out in constructor arguments · 0361fc03
      Alec Theriault authored
      When run with -haddock, a constructor argument can have both a a
      strictness/unpackedness annotation and a docstring. The parser binds
      'HsBangTy' more tightly than 'HsDocTy', yet for constructor arguments we
      really need the 'HsBangTy' on the outside.
      
      This commit does this shuffling in the 'mkConDeclH98' and 'mkGadtDecl'
      smart constructors.
      
      Test Plan: haddockA038, haddockC038
      
      Reviewers: bgamari, dfeuer
      
      Reviewed By: bgamari
      
      Subscribers: dfeuer, rwbarton, thomie, carter
      
      Differential Revision: https://phabricator.haskell.org/D4727
      0361fc03
  6. 02 Jun, 2018 1 commit
    • Ben Gamari's avatar
      vectorise: Put it out of its misery · faee23bb
      Ben Gamari authored
      Poor DPH and its vectoriser have long been languishing; sadly it seems there is
      little chance that the effort will be rekindled. Every few years we discuss
      what to do with this mass of code and at least once we have agreed that it
      should be archived on a branch and removed from `master`. Here we do just that,
      eliminating heaps of dead code in the process.
      
      Here we drop the ParallelArrays extension, the vectoriser, and the `vector` and
      `primitive` submodules.
      
      Test Plan: Validate
      
      Reviewers: simonpj, simonmar, hvr, goldfire, alanz
      
      Reviewed By: simonmar
      
      Subscribers: goldfire, rwbarton, thomie, mpickering, carter
      
      Differential Revision: https://phabricator.haskell.org/D4761
      faee23bb
  7. 27 Apr, 2018 1 commit
    • Alan Zimmerman's avatar
      TTG : complete for balance of hsSyn AST · c3823cba
      Alan Zimmerman authored
      Summary:
      - remove PostRn/PostTc fields
      - remove the HsVect In/Out distinction for Type, Class and Instance
      - remove PlaceHolder in favour of NoExt
      - Simplify OutputableX constraint
      
      Updates haddock submodule
      
      Test Plan: ./validate
      
      Reviewers: goldfire, bgamari
      
      Subscribers: goldfire, thomie, mpickering, carter
      
      Differential Revision: https://phabricator.haskell.org/D4625
      c3823cba
  8. 13 Apr, 2018 1 commit
    • Alan Zimmerman's avatar
      TTG for HsBinds and Data instances Plan B · b1386942
      Alan Zimmerman authored
      Summary:
      - Add the balance of the TTG extensions for hsSyn/HsBinds
      
      - Move all the (now orphan) data instances into hsSyn/HsInstances and
      use TTG Data instances Plan B
      https://ghc.haskell.org/trac/ghc/wiki/ImplementingTreesThatGrow/Instances#PLANB
      
      Updates haddock submodule.
      
      Illustrative numbers
      
      Compiling HsInstances before using Plan B.
      
      Max residency ~ 5G
      <<ghc: 629,864,691,176 bytes, 5300 GCs,
             321075437/1087762592 avg/max bytes residency (23 samples),
             2953M in use, 0.000 INIT (0.000 elapsed),
             383.511 MUT (384.986 elapsed), 37.426 GC (37.444 elapsed) :ghc>>
      
      Using Plan B
      
      Max residency 1.1G
      
      <<ghc: 78,832,782,968 bytes, 2884 GCs,
             222140352/386470152 avg/max bytes residency (34 samples),
             1062M in use, 0.001 INIT (0.001 elapsed),
             56.612 MUT (62.917 elapsed), 32.974 GC (32.923 elapsed) :ghc>>
      
      Test Plan: ./validate
      
      Reviewers: shayan-najd, goldfire, bgamari
      
      Subscribers: goldfire, thomie, mpickering, carter
      
      Differential Revision: https://phabricator.haskell.org/D4581
      b1386942
  9. 10 Apr, 2018 1 commit
  10. 09 Apr, 2018 1 commit
  11. 14 Mar, 2018 1 commit
    • Ömer Sinan Ağacan's avatar
      Slighly improve infix con app pattern errors · cb6d8589
      Ömer Sinan Ağacan authored
      Given this program:
      
          main = do
            f $ do
              a <- return 3
                c <- do
                return 5
      
      GHC previously gave this error message:
      
          Main.hs:2:7: error:
              Parse error in pattern: do a <- return 3 c
              Possibly caused by a missing 'do'?
            |
          2 |   f $ do
            |       ^^...
      
      What happened is GHC considered the whole `f $ do a <- return 3 c` as a
      pattern. When parsed as an expression it becomes an infix application of
      `($)`, and GHC checks left and right hand sides before checking if `($)`
      is a valid infix constructor name, and shows the first error it got.
      
      If instead we first check if the infix op is valid in pattern context,
      the error message becomes much clearer:
      
          Main.hs:2:3: error:
              Parse error in pattern: f $ do a <- return 3 c
              Possibly caused by a missing 'do'?
            |
          2 |   f $ do
            |   ^^^^^^...
      
      This may not entirely fix #11188 but I think it's an improvement.
      
      Reviewers: bgamari
      
      Reviewed By: bgamari
      
      Subscribers: rwbarton, thomie, carter
      
      GHC Trac Issues: #11188
      
      Differential Revision: https://phabricator.haskell.org/D4497
      cb6d8589
  12. 02 Mar, 2018 1 commit
    • Ryan Scott's avatar
      Fix #14838 by marking TH-spliced code as FromSource · ffb2738f
      Ryan Scott authored
      Previously, any Template Haskell code that was spliced would
      be marked as `Generated`, which would completely suppress pattern-
      match coverage warnings for it, which several folks found confusing.
      Indeed, Template Haskell-spliced code is "source" code in some sense,
      as users specifically request that it be put into their program, so
      changing its designation to `FromSource` makes sense from that
      perspective.
      
      Test Plan: make test TEST=T14838
      
      Reviewers: goldfire, bgamari
      
      Reviewed By: bgamari
      
      Subscribers: rwbarton, thomie, carter
      
      GHC Trac Issues: #14838
      
      Differential Revision: https://phabricator.haskell.org/D4440
      ffb2738f
  13. 13 Feb, 2018 1 commit
    • Tao He's avatar
      Raise parse error for `data T where`. · 8936ab69
      Tao He authored
      
      
      Empty GADTs data declarations can't be identified in type checker. This
      patch adds additional checks in parser and raise a parse error when
      encounter empty GADTs declarations but extension `GADTs` is not enabled.
      
      Only empty declarations are checked in parser to avoid affecting
      existing
      error messages related to missing GADTs extension.
      
      This patch should fix issue 8258.
      Signed-off-by: Tao He's avatarHE, Tao <sighingnow@gmail.com>
      
      Test Plan: make test TEST="T8258 T8258NoGADTs"
      
      Reviewers: bgamari, mpickering, alanz, RyanGlScott
      
      Reviewed By: bgamari, RyanGlScott
      
      Subscribers: adamse, RyanGlScott, rwbarton, thomie, mpickering, carter
      
      GHC Trac Issues: #8258
      
      Differential Revision: https://phabricator.haskell.org/D4350
      8936ab69
  14. 01 Feb, 2018 2 commits
    • Tao He's avatar
      UnboxedTuples can't be used as constraints · ced9fbd3
      Tao He authored
      Fixes #14740.
      
      Test Plan: make test TEST="14740"
      
      Reviewers: bgamari, simonpj
      
      Reviewed By: simonpj
      
      Subscribers: simonpj, rwbarton, thomie, carter
      
      GHC Trac Issues: #14740
      
      Differential Revision: https://phabricator.haskell.org/D4359
      ced9fbd3
    • takano-akio's avatar
      Implement BlockArguments (#10843) · be84823b
      takano-akio authored
      This patch implements the BlockArguments extension, as proposed at
      https://github.com/ghc-proposals/ghc-proposals/pull/90. It also
      fixes #10855 as a side-effect.
      
      This patch adds a large number of shift-reduce conflicts to the parser.
      All of them concern the ambiguity as to where constructs like `if` and
      `let` end. Fortunately they are resolved correctly by preferring shift.
      
      The patch is based on @gibiansky's ArgumentDo implementation (D1219).
      
      Test Plan: ./validate
      
      Reviewers: goldfire, bgamari, alanz, mpickering
      
      Reviewed By: bgamari, mpickering
      
      Subscribers: Wizek, dfeuer, gibiansky, rwbarton, thomie, mpickering, carter
      
      GHC Trac Issues: #10843, #10855
      
      Differential Revision: https://phabricator.haskell.org/D4260
      be84823b
  15. 12 Jan, 2018 1 commit
    • Alec Theriault's avatar
      Support constructor Haddocks in more places · e20046a0
      Alec Theriault authored
      This adds support for adding Haddocks on individual non-record fields
      of regular (and GADT) constructors. The following now parses just fine
      with `-haddock` enabled:
      
      data Foo
        = Baz             -- ^ doc on the `Baz` constructor
            Int           -- ^ doc on the `Int` field of `Baz`
            String        -- ^ doc on the `String` field of `Baz`
      
        | Int             -- ^ doc on the `Int` field of the `:*` constructor
            :*            -- ^ doc on the `:*` constructor
          String          -- ^ doc on the `String` field of the `:*`
      constructor
      
        | Boa             -- ^ doc on the `Boa` record constructor
            { y :: () }
      
      The change is backwards compatible: if there is only one doc and it
      occurs
      on the last field, it is lifted to apply to the whole constructor (as
      before).
      
      Reviewers: bgamari, alanz
      
      Subscribers: rwbarton, thomie, mpickering, carter
      
      Differential Revision: https://phabricator.haskell.org/D4292
      e20046a0
  16. 21 Dec, 2017 1 commit
    • Ryan Scott's avatar
      Fix #14588 by checking for more bang patterns · 9caf40e9
      Ryan Scott authored
      Summary:
      Commit 37299536
      inadvertently removed a check in the parser which rejected
      let-bindings with bang patterns, leading to #14588. This fixes it by
      creating a `hintBangPat` function to perform this check, and
      sprinkling it in the right places.
      
      Test Plan: make test TEST=T14588
      
      Reviewers: bgamari, alanz, simonpj
      
      Reviewed By: bgamari, simonpj
      
      Subscribers: rwbarton, thomie, mpickering, carter
      
      GHC Trac Issues: #14588
      
      Differential Revision: https://phabricator.haskell.org/D4270
      9caf40e9
  17. 07 Dec, 2017 1 commit
    • Simon Peyton Jones's avatar
      Refactor ConDecl: Trac #14529 · fa29df02
      Simon Peyton Jones authored
      This patch refactors HsDecls.ConDecl.  Specifically
      
      * ConDeclGADT was horrible, with all the information hidden
        inside con_res_ty.  Now it's kept separate, as it should be.
      
      * ConDeclH98: use [LHsTyVarBndr] instead of LHsQTyVars for the
        existentials. There is no implicit binding here.
      
      * Add a field con_forall to both ConDeclGADT and ConDeclH98
        which says if there is an explicit user-written forall.
      
      * Field renamings in ConDecl
           con_cxt     to con_mb_cxt
           con_details to con_args
      
      There is an accompanying submodule update to Haddock.
      
      Also the following change turned out to remove a lot of clutter:
      
      * add a smart constructor for HsAppsTy, namely mkHsAppsTy,
        and use it consistently. This avoids a lot of painful pattern
        matching for the common singleton case.
      
      Two api-annotation tests (T10278, and T10399) are broken, hence marking
      them as expect_broken(14529).  Alan is going to fix them, probably by
      changing the con_forall field to
         con_forall :: Maybe SrcSpan
      instead of Bool
      fa29df02
  18. 21 Nov, 2017 1 commit
    • Ben Gamari's avatar
      Revert "trees that grow" work · 314bc314
      Ben Gamari authored
      As documented in #14490, the Data instances currently blow up
      compilation time by too much to stomach. Alan will continue working on
      this in a branch and we will perhaps merge to 8.2 before 8.2.1 to avoid
      having to perform painful cherry-picks in 8.2 minor releases.
      
      Reverts haddock submodule.
      
      This reverts commit 47ad6578.
      This reverts commit e3ec2e7a.
      This reverts commit 438dd1cb.
      This reverts commit 0ff152c9.
      314bc314
  19. 14 Nov, 2017 1 commit
  20. 11 Nov, 2017 1 commit
  21. 08 Nov, 2017 1 commit
  22. 07 Nov, 2017 2 commits
  23. 05 Oct, 2017 1 commit
  24. 19 Sep, 2017 1 commit
    • Herbert Valerio Riedel's avatar
      compiler: introduce custom "GhcPrelude" Prelude · f63bc730
      Herbert Valerio Riedel authored
      This switches the compiler/ component to get compiled with
      -XNoImplicitPrelude and a `import GhcPrelude` is inserted in all
      modules.
      
      This is motivated by the upcoming "Prelude" re-export of
      `Semigroup((<>))` which would cause lots of name clashes in every
      modulewhich imports also `Outputable`
      
      Reviewers: austin, goldfire, bgamari, alanz, simonmar
      
      Reviewed By: bgamari
      
      Subscribers: goldfire, rwbarton, thomie, mpickering, bgamari
      
      Differential Revision: https://phabricator.haskell.org/D3989
      f63bc730
  25. 29 Aug, 2017 1 commit
  26. 31 Jul, 2017 2 commits
  27. 27 Jun, 2017 1 commit
    • Ben Gamari's avatar
      Treat banged bindings as FunBinds · 6567c815
      Ben Gamari authored
      This is another attempt at resolving #13594 by treating strict variable
      binds as FunBinds instead of PatBinds (as suggested in comment:1).
      
      Test Plan: Validate
      
      Reviewers: austin, alanz
      
      Subscribers: rwbarton, thomie, mpickering
      
      GHC Trac Issues: #13594
      
      Differential Revision: https://phabricator.haskell.org/D3670
      6567c815
  28. 05 Jun, 2017 1 commit
    • Alan Zimmerman's avatar
      Udate hsSyn AST to use Trees that Grow · 8e6ec0fa
      Alan Zimmerman authored
      Summary:
      See https://ghc.haskell.org/trac/ghc/wiki/ImplementingTreesThatGrow
      
      This commit prepares the ground for a full extensible AST, by replacing the type
      parameter for the hsSyn data types with a set of indices into type families,
      
          data GhcPs -- ^ Index for GHC parser output
          data GhcRn -- ^ Index for GHC renamer output
          data GhcTc -- ^ Index for GHC typechecker output
      
      These are now used instead of `RdrName`, `Name` and `Id`/`TcId`/`Var`
      
      Where the original name type is required in a polymorphic context, this is
      accessible via the IdP type family, defined as
      
          type family IdP p
          type instance IdP GhcPs = RdrName
          type instance IdP GhcRn = Name
          type instance IdP GhcTc = Id
      
      These types are declared in the new 'hsSyn/HsExtension.hs' module.
      
      To gain a better understanding of the extension mechanism, it has been applied
      to `HsLit` only, also replacing the `SourceText` fields in them with extension
      types.
      
      To preserve extension generality, a type class is introduced to capture the
      `SourceText` interface, which must be honoured by all of the extension points
      which originally had a `SourceText`.  The class is defined as
      
          class HasSourceText a where
            -- Provide setters to mimic existing constructors
            noSourceText  :: a
            sourceText    :: String -> a
      
            setSourceText :: SourceText -> a
            getSourceText :: a -> SourceText
      
      And the constraint is captured in `SourceTextX`, which is a constraint type
      listing all the extension points that make use of the class.
      
      Updating Haddock submodule to match.
      
      Test Plan: ./validate
      
      Reviewers: simonpj, shayan-najd, goldfire, austin, bgamari
      
      Subscribers: rwbarton, thomie, mpickering
      
      Differential Revision: https://phabricator.haskell.org/D3609
      8e6ec0fa
  29. 12 May, 2017 1 commit
    • Ben Gamari's avatar
      Revert "Treat banged bindings as FunBinds" · 3032ae81
      Ben Gamari authored
      This partially reverts commit 37299536 as it
      doesn't actually fix #13594. Namely it does not revert the mkPrefixFunRhs
      refactoring since this is rather independent from the functional changes.
      
      Going to try again with a whole working patch
      3032ae81
  30. 11 May, 2017 1 commit
  31. 09 May, 2017 1 commit
    • Ben Gamari's avatar
      Treat banged bindings as FunBinds · 37299536
      Ben Gamari authored
      This reworks the HsSyn representation to make banged variable patterns
      (e.g. !x = e) be represented as FunBinds instead of PatBinds, adding a flag to
      FunRhs to record the bang.
      
      Fixes #13594.
      
      Reviewers: austin, goldfire, alanz, simonpj
      
      Reviewed By: simonpj
      
      Subscribers: simonpj, rwbarton, thomie, mpickering
      
      Differential Revision: https://phabricator.haskell.org/D3525
      37299536
  32. 29 Mar, 2017 1 commit
  33. 06 Mar, 2017 1 commit
  34. 26 Jan, 2017 2 commits
    • Alan Zimmerman's avatar
      Make type import/export API Annotation friendly · 0d1cb157
      Alan Zimmerman authored
      Summary:
      At the moment an export of the form
      
         type C(..)
      
      is parsed by the rule
      
      ```
        |  'type' oqtycon           {% amms (mkTypeImpExp (sLL $1 $> (unLoc $2)))
                                           [mj AnnType $1,mj AnnVal $2] }
      ```
      
      This means that the origiinal oqtycon loses its location which is then retained
      in the AnnVal annotation.
      
      The problem is if the oqtycon has its own annotations, these get lost.
      
      e.g. in
      
        type (?)(..)
      
      the parens annotations for (?) get lost.
      
      This patch adds a wrapper around the name in the IE type to
      
      (a) provide a distinct location for the adornment annotation and
      
      (b) identify the specific adornment, for use in the pretty printer rather than
      occName magic.
      
      Updates haddock submodule
      
      Test Plan: ./validate
      
      Reviewers: mpickering, dfeuer, bgamari, austin
      
      Reviewed By: dfeuer
      
      Subscribers: dfeuer, thomie, mpickering
      
      Differential Revision: https://phabricator.haskell.org/D3016
      
      GHC Trac Issues: #13163
      0d1cb157
    • Matthew Pickering's avatar
      COMPLETE pragmas for enhanced pattern exhaustiveness checking · 1a3f1eeb
      Matthew Pickering authored
      This patch adds a new pragma so that users can specify `COMPLETE` sets of
      `ConLike`s in order to sate the pattern match checker.
      
      A function which matches on all the patterns in a complete grouping
      will not cause the exhaustiveness checker to emit warnings.
      
      ```
      pattern P :: ()
      pattern P = ()
      
      {-# COMPLETE P #-}
      
      foo P = ()
      ```
      
      This example would previously have caused the checker to warn that
      all cases were not matched even though matching on `P` is sufficient to
      make `foo` covering. With the addition of the pragma, the compiler
      will recognise that matching on `P` alone is enough and not emit
      any warnings.
      
      Reviewers: goldfire, gkaracha, alanz, austin, bgamari
      
      Reviewed By: alanz
      
      Subscribers: lelf, nomeata, gkaracha, thomie
      
      Differential Revision: https://phabricator.haskell.org/D2669
      
      GHC Trac Issues: #8779
      1a3f1eeb
  35. 12 Dec, 2016 1 commit
    • Alan Zimmerman's avatar
      Add infix flag for class and data declarations · 8f6d241a
      Alan Zimmerman authored
      Summary:
      At the moment, data and type declarations using infix formatting produce the
      same AST as those using prefix.
      
      So
      
          type a ++ b = c
      
      and
      
          type (++) a b = c
      
      cannot be distinguished in the parsed source, without looking at the OccName
      details of the constructor being defined.
      
      Having access to the OccName requires an additional constraint which explodes
      out over the entire AST because of its recursive definitions.
      
      In keeping with moving the parsed source to more directly reflect the source
      code as parsed, add a specific flag to the declaration to indicate the fixity,
      as used in a Match now too.
      
      Note: this flag is to capture the fixity used for the lexical definition of the
      type, primarily for use by ppr and ghc-exactprint.
      
      Updates haddock submodule.
      
      Test Plan: ./validate
      
      Reviewers: mpickering, goldfire, bgamari, austin
      
      Reviewed By: mpickering
      
      Subscribers: thomie
      
      Differential Revision: https://phabricator.haskell.org/D2828
      
      GHC Trac Issues: #12942
      8f6d241a
  36. 07 Dec, 2016 1 commit
    • Alan Zimmerman's avatar
      Add HsSyn prettyprinter tests · 499e4382
      Alan Zimmerman authored
      Summary:
      Add prettyprinter tests, which take a file, parse it, pretty print it,
      re-parse the pretty printed version and then compare the original and
      new ASTs (ignoring locations)
      
      Updates haddock submodule to match the AST changes.
      
      There are three issues outstanding
      
      1. Extra parens around a context are not reproduced. This will require an
         AST change and will be done in a separate patch.
      
      2. Currently if an `HsTickPragma` is found, this is not pretty-printed,
         to prevent noise in the output.
      
         I am not sure what the desired behaviour in this case is, so have left
         it as before. Test Ppr047 is marked as expected fail for this.
      
      3. Apart from in a context, the ParsedSource AST keeps all the parens from
         the original source.  Something is happening in the renamer to remove the
         parens around visible type application, causing T12530 to fail, as the
         dumped splice decl is after the renamer.
      
         This needs to be fixed by keeping the parens, but I do not know where they
         are being removed.  I have amended the test to pass, by removing the parens
         in the expected output.
      
      Test Plan: ./validate
      
      Reviewers: goldfire, mpickering, simonpj, bgamari, austin
      
      Reviewed By: simonpj, bgamari
      
      Subscribers: simonpj, goldfire, thomie, mpickering
      
      Differential Revision: https://phabricator.haskell.org/D2752
      
      GHC Trac Issues: #3384
      499e4382