1. 15 Dec, 2015 19 commits
    • Ben Gamari's avatar
      Expose enabled language extensions to TH · c1e25536
      Ben Gamari authored
      This exposes `template-haskell` functions for querying the language
      extensions which are enabled when compiling a module,
      
      - an `isExtEnabled` function to check whether an extension is enabled
      - an `extsEnabled` function to obtain a full list of enabled extensions
      
      To avoid code duplication this adds a `GHC.LanguageExtensions` module to
      `ghc-boot` and moves `DynFlags.ExtensionFlag` into it. A happy
      consequence of this is that the ungainly `DynFlags` lost around 500
      lines. Moreover, flags corresponding to language extensions are now
      clearly distinguished from other flags due to the `LangExt.*` prefix.
      
      Updates haddock submodule.
      
      This fixes #10820.
      
      Test Plan: validate
      
      Reviewers: austin, spinda, hvr, goldfire, alanz
      
      Reviewed By: goldfire
      
      Subscribers: mpickering, RyanGlScott, hvr, simonpj, thomie
      
      Differential Revision: https://phabricator.haskell.org/D1200
      
      GHC Trac Issues: #10820
      c1e25536
    • Ben Gamari's avatar
      primops: Mark actions evaluated by `catch*` as lazy · 28638dfe
      Ben Gamari authored
      There is something very peculiar about the `catch` family of operations
      with respect to strictness analysis: they turn divergence into
      non-divergence. For this reason, it isn't safe to mark them as strict in
      the expression whose exceptions they are catching. The reason is this:
      
      Consider,
      
          let r = \st -> raiseIO# blah st
          in catch (\st -> ...(r st)..) handler st
      
      If we give the first argument of catch a strict signature, we'll get a
      demand 'C(S)' for 'r'; that is, 'r' is definitely called with one
      argument, which indeed it is. The trouble comes when we feed 'C(S)' into
      'r's RHS as the demand of the body as this will lead us to conclude that
      the whole 'let' will diverge; clearly this isn't right.
      
      This is essentially the problem in #10712, which arose when
      7c0fff41 marked the `catch*` primops as
      being strict in the thing to be evaluated. Here I've partially reverted
      this commit, again marking the first argument of these primops as lazy.
      
      Fixes #10712.
      
      Test Plan: Validate checking `exceptionsrun001`
      
      Reviewers: simonpj, austin
      
      Subscribers: thomie
      
      Differential Revision: https://phabricator.haskell.org/D1616
      
      GHC Trac Issues: #10712, #11222
      28638dfe
    • Ben Gamari's avatar
      Add testcase for #11224 · a701694b
      Ben Gamari authored
      Test Plan: Validate
      
      Reviewers: austin, mpickering
      
      Reviewed By: mpickering
      
      Subscribers: mpickering, thomie
      
      Differential Revision: https://phabricator.haskell.org/D1622
      
      GHC Trac Issues: #11224
      a701694b
    • Ben Gamari's avatar
      base: NonEmpty: Fix documentation example · 758e6b3a
      Ben Gamari authored
      Fixes #11178.
      758e6b3a
    • Ben Gamari's avatar
      Narrow scope of special-case for unqualified printing of names in core libraries · e2c91738
      Ben Gamari authored
      Commit 547c5971 modifies the
      pretty-printer to render names from a set of core packages (`base`,
      `ghc-prim`, `template-haskell`) as unqualified. The idea here was that
      many of these names typically are not in scope but are well-known by the
      user and therefore qualification merely introduces noise.
      
      This, however, is a very large hammer and potentially breaks any
      consumer who relies on parsing GHC output (hence #11208). This commit
      partially reverts this change, now only printing `Constraint` (which
      appears quite often in errors) as unqualified.
      
      Fixes #11208.
      
      Updates tests in `array` submodule.
      
      Test Plan: validate
      
      Reviewers: hvr, thomie, austin
      
      Subscribers: thomie
      
      Differential Revision: https://phabricator.haskell.org/D1619
      
      GHC Trac Issues: #11208
      e2c91738
    • Simon Peyton Jones's avatar
      Comment layout only · 947e44fe
      Simon Peyton Jones authored
      947e44fe
    • Simon Peyton Jones's avatar
      Allow recursive (undecidable) superclasses · 6eabb6dd
      Simon Peyton Jones authored
      This patch fulfils the request in Trac #11067, #10318, and #10592,
      by lifting the conservative restrictions on superclass constraints.
      
      These restrictions are there (and have been since Haskell was born) to
      ensure that the transitive superclasses of a class constraint is a finite
      set.  However (a) this restriction is conservative, and can be annoying
      when there really is no recursion, and (b) sometimes genuinely recursive
      superclasses are useful (see the tickets).
      
      Dimitrios and I worked out that there is actually a relatively simple way
      to do the job. It’s described in some detail in
      
         Note [The superclass story] in TcCanonical
         Note [Expanding superclasses] in TcType
      
      In brief, the idea is to expand superclasses only finitely, but to
      iterate (using a loop that already existed) if there are more
      superclasses to explore.
      
      Other small things
      
      - I improved grouping of error messages a bit in TcErrors
      
      - I re-centred the haddock.compiler test, which was at 9.8%
        above the norm, and which this patch pushed slightly over
      6eabb6dd
    • Simon Peyton Jones's avatar
      Comments on equality types and classes · b8ca6459
      Simon Peyton Jones authored
      This is really just doucumenting one aspect of the kind-equality patch.
      
      See especially Note [Equality types and classes] in TysWiredIn.
      Other places should just point to this Note.
      
      Richard please check for veracity.
      b8ca6459
    • Simon Peyton Jones's avatar
      Improve documentation for -XStrict · 98cdaee7
      Simon Peyton Jones authored
      In particular, highlight that we do not put bangs on nested patterns
      98cdaee7
    • Simon Peyton Jones's avatar
      Fix formatting complaint from Sphinx · d1ca5d21
      Simon Peyton Jones authored
      d1ca5d21
    • Herbert Valerio Riedel's avatar
      Reset process submodule to v1.4.1.0 release tag · f4d90f96
      Herbert Valerio Riedel authored
      The `process-1.4.1.0` release is the version designated for GHC 8.0.1
      
      /cc @snoyberg
      f4d90f96
    • Erik de Castro Lopo's avatar
      Update expected test output for 32 bit platforms · 4c9d1eab
      Erik de Castro Lopo authored
      Test Plan: Run tests on a 32 bit platform
      
      Reviewers: austin, hvr, bgamari
      
      Reviewed By: bgamari
      
      Subscribers: thomie
      
      Differential Revision: https://phabricator.haskell.org/D1627
      4c9d1eab
    • Ömer Sinan Ağacan's avatar
    • Adam Gundry's avatar
      Document -XOverloadedLabels · f4dd4862
      Adam Gundry authored
      This adds documentation of the new `OverloadedLabels` extension to
      the users' guide.  Thanks to @bgamari for patiently reminding me
      to get this done.  Feedback welcome.
      
      Test Plan: N/A
      
      Reviewers: austin, bgamari
      
      Reviewed By: bgamari
      
      Subscribers: thomie, bgamari
      
      Differential Revision: https://phabricator.haskell.org/D1623
      f4dd4862
    • thomie's avatar
      DynFlags: delete function that doesn't do anything · 33742db5
      thomie authored
      Reviewers: austin, bgamari
      
      Reviewed By: austin, bgamari
      
      Differential Revision: https://phabricator.haskell.org/D1606
      33742db5
    • thomie's avatar
      DynFlags: remove Opt_Static · 6d9c18cb
      thomie authored
      There are currently 2 different ways to test for a static or dynamic
      build:
      
          * Test if WayDyn is in ways
          * Test if Opt_Static is set
      
      The problem is that these can easily go out of sync, especially when
      using the
      GHC API.
      
      This commit replaces all queries of Opt_Static with an equivalent query
      of
      WayDyn. This would have prevented bug #8294 and fixes #11154.
      
      Reviewers: hvr, austin, bgamari
      
      Reviewed By: austin, bgamari
      
      Differential Revision: https://phabricator.haskell.org/D1607
      
      GHC Trac Issues: #10636
      6d9c18cb
    • Ryan Scott's avatar
      Fix runghc when $1_$2_SHELL_WRAPPER = NO · 05a5ebed
      Ryan Scott authored
      When that variable isn't on (which is always the case on Windows),
      `runghc` naively attempts to invoke `ghc` by finding an executable
      simply named `ghc`. This won't work if `ghc` doesn't exist (e.g., if
      we're building GHC and using `ghc-stage2` instead). A simple fix is to
      test for the existence of `ghc` beforehand, and if that fails, fall back
      on `ghc-stage2`.
      
      Fixes #11185.
      
      Test Plan: ./validate
      
      Reviewers: austin, hvr, thomie, bgamari
      
      Reviewed By: thomie, bgamari
      
      Differential Revision: https://phabricator.haskell.org/D1621
      
      GHC Trac Issues: #11185
      05a5ebed
    • thomie's avatar
      Mention "handle is semi-closed" in error messages · 9017f16a
      thomie authored
      Semi-closedness is mentioned in the Haskell report, so lets not hide it
      from users.
      
      Reviewers: austin, hvr, bgamari
      
      Reviewed By: bgamari
      
      Differential Revision: https://phabricator.haskell.org/D1624
      9017f16a
    • Ben Gamari's avatar
      DynFlags Remove -fwarn-context-quantification flag · ddde542d
      Ben Gamari authored
      As mentioned in #4426 these warnings are now errors since the Great
      Wildcards Refactor of 2015 (1e041b73).
      I've opened #11221 to ensure we remove the last traces of the option in
      8.2.
      
      Test Plan: validate
      
      Reviewers: austin
      
      Subscribers: thomie
      
      Differential Revision: https://phabricator.haskell.org/D1615
      
      GHC Trac Issues: #4426
      ddde542d
  2. 14 Dec, 2015 9 commits
  3. 13 Dec, 2015 2 commits
  4. 12 Dec, 2015 10 commits