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See https://gitlab.haskell.org/ghc/ghc/merge_requests/2372
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`FunTy` now has an `AnonArgFlag` that indicates whether the arrow is
a `t1 => t2` or `t1 -> t2`.
This commit shouldn't change any functionality in Haddock.
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Changes in 19626218566ea709b5f6f287d3c296b0c4021de2 affected some
of the hyperlinker output. Accepted the new output (hovering over a
`..` now shows you what that wildcard binds).
Also fixed some stray deprecation warnings.
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Now that Haddock is moving towards working entirely over `.hi` and `.hie` files,
all declarations and types are going to be synthesized via the `Convert` module.
In preparation for this change, here are a bunch of fixes to this module:
* Add kind annotations to type variables in `forall`'s whose kind is not `Type`,
unless the kind can be inferred from some later use of the variable. See
`implicitForAll` and `noKindTyVars` in particular if you wish to dive into this.
* Properly detect `HsQualTy` in `synifyType`. This is done by following suit with
what GHC's `toIfaceTypeX` does and checking the first argument of
`FunTy{} :: Type` to see if it classified as a given/wanted in the typechecker
(see `isPredTy`).
* Beef up the logic around figuring out when an explicit `forall` is needed. This
includes: observing if any of the type variables will need kind signatures, if the
inferred type variable order _without_ a forall will still match the one GHC
claims, and some other small things.
* Add some (not yet used) functionality for default levity polymorphic type
signatures. This functionality similar to `fprint-explicit-runtime-reps`.
Couple other smaller fixes only worth mentioning:
* Show the family result signature only when it isn't `Type`
* Fix rendering of implicit parameters in the LaTeX and Hoogle backends
* Better handling of the return kind of polykinded H98 data declarations
* Class decls produced by `tyThingToLHsDecl` now contain associated type
defaults and default method signatures when appropriate
* Filter out more `forall`'s in pattern synonyms
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# Summary
This is a large architectural change to the Hyperlinker.
* extract link (and now also type) information from `.hie` instead
of doing ad-hoc SYB traversals of the `RenamedSource`. Also
adds a superb type-on-hover feature (#715).
* re-engineer the lexer to avoid needless string conversions. By going
directly through GHC's `P` monad and taking bytestring slices, we
avoid a ton of allocation and have better handling of position
pragmas and CPP.
In terms of performance, the Haddock side of things has gotten _much_
more efficient. Unfortunately, much of this is cancelled out by the
increased GHC workload for generating `.hie` files. For the full set of
boot libs (including `ghc`-the-library)
* the sum of total time went down by 9-10% overall
* the sum of total allocations went down by 6-7%
# Motivation
Haddock is moving towards working entirely over `.hi` and `.hie` files.
This change means we no longer need the `RenamedSource` from
`TypecheckedModule` (something which is _not_ in `.hi` files).
# Details
Along the way a bunch of things were fixed:
* Cross package (and other) links are now more reliable (#496)
* The lexer tries to recover from errors on every line (instead of at CPP
boundaries)
* `LINE`/`COLUMN` pragmas are taken into account
* filter out zero length tokens before rendering
* avoid recomputing the `ModuleName`-based `SrcMap`
* remove the last use of `Documentation.Haddock.Utf8` (see #998)
* restructure temporary folder logic for `.hi`/`.hie` model
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This commit should not introduce any change in functionality!
* consistently use `getOccString` to convert `Name`s to strings
* compare names directly when possible (instead of comparing strings)
* get rid of unused utility functions
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This will make investigation of #979 easier
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* remove redundant imports (only brought to light due to recent work for
improving redundant import detection)
* fix a bug that was casuing exports to appear in reverse order
* fix something in haddock-library that prevented compilation on old GHC's
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Trac Issues #15495
This patch removes the ping-pong style from HsPat (only, for now), using the plan laid out at https://ghc.haskell.org/trac/ghc/wiki/ImplementingTreesThatGrow/HandlingSourceLocations (solution A).
- the class `HasSrcSpan`, and its functions (e.g., `cL` and `dL`), are introduced
- some instances of `HasSrcSpan` are introduced
- some constructors `L` are replaced with `cL`
- some patterns `L` are replaced with `dL->L` view pattern
- some type annotation are necessarily updated (e.g., `Pat p` --> `Pat (GhcPass p)`)
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It got introduced in ghc/ghc@ae2c9b40f5b6bf272251d1f4107c60003f541b62.
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AFAICT this wasn't causing any crashes, but that's mostly because
we happen not to be forcing `pkgStr` when it would diverge. We come
dangerously close to doing that in `ppHtmlIndex`.
Fixes #569.
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The old approach to fixing #469, while correct, consumes a lot of
memory. We ended up with a HUGE 'GblRdrEnv' in 'ic_rn_gbl_env'. However,
'getNameToInstancesIndex' takes that environment and compresses it down
to a much smaller 'ModuleSet'.
Now, we compute that 'ModuleSet' explicitly as we process modules. That
way we can just tell 'getNameToInstancesIndex' what modules to load
(instead of it trying to compute that information from the interactive
context).
(cherry picked from commit 5c7c596c51d69b92164e9ba920157b36ce2b2ec1)
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the same type
This also changes the defaulting heuristic for ambiguous identifiers.
We now prefer local names primarily, and type constructors or class
names secondarily.
Partially fixes #854.
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* Revert "Bump GHC version to 8.6"
This was applied to the wrong branch; there's now a `ghc-8.6` branch;
ghc-head is always supposed to point to GHC HEAD, i.e. an odd major version.
The next version bump to `ghc-head` is supposed to go from e.g. 8.5 to 8.7
This reverts commit 5e3cf5d8868323079ff5494a8225b0467404a5d1.
* README updates (#856)
* README: Remove mentions of master branch
* README: Add instructions for using html-test
* README: Change command to run _all_ the testsuites
* README: Add project overview section
(cherry picked from commit 61d6f935da97eb96685f07bf385102c2dbc2a33c)
* Export more fixities for Hoogle (#871)
This exports fixities for more things, including class methods and
type-level operators.
(cherry picked from commit 88316b972e3d47197b1019111bae0f7f87275fce)
* Avoid line breaks due to line length in Hoogle (#868)
* Avoid line breaks due to line length in Hoogle
Hoogle operates in a line-oriented fashion, so we should avoid ever
breaking due to long lines.
One way of doing this non-intrusively is to modify the 'DynFlags' that
are threaded through the 'Hoogle' module (note this is anyways only
passed through for use in the various 'showSDoc' functions).
* Amend test case
(cherry picked from commit 657b1b3d519545f8d4ca048c06210d6cbf0f0da0)
* tyThingToLHsDecl: Preserve type synonyms that contain a forall (#880)
* tyThingToLHsDecls: Preserve type synonyms that contain a forall
Fixes #879.
* Add Note [Invariant: Never expand type synonyms]
* Clarify Note [Invariant: Never expand type synonyms]
(cherry picked from commit c3eb3f0581f69e816f9453b1747a9f2a3ba02bb9)
* Fix HEAD html-test (#860)
* Update tests for 'StarIsType'
* Accept tests
* Revert "Update tests for 'StarIsType'"
This reverts commit 7f0c01383bbba6dc5af554ee82988d2cf44e407a.
* Refactor handling of parens in types (#874)
* Fix type parenthesization in Hoogle backend
Ported the logic in the HTML and LaTeX backends for adding in parens
into something top-level in 'GhcUtil'. Calling that from the Hoogle
backend fixes #873.
* Remove parenthesizing logic from LaTeX and XHTML backends
Now, the only times that parenthesis in types are added in any backend
is through the explicit 'HsParTy' constructor. Precedence is also
represented as its own datatype.
* List out cases explicitly vs. catch-all
* Fix printing of parens for QuantifiedConstraints
The priority of printing 'forall' types was just one too high.
Fixes #877.
* Accept HTML output for quantified contexts test
* Preserve docs on type family instances (#867)
* Preserve docs on type family instances
The only problem was that the instance location was slightly off
for type family instances.
* Accept output
(cherry picked from commit 133e9c2c168db19c1135479f7ab144c4e33af2a4)
* Fix broken instance source links (#869)
The problem manifests itself in instances that are defined in
modules other than the module where the class is defined. The fix
is just to thread through the 'Module' of the instance further
along.
Since orphan instances appear to already have been working, I didn't
do anything there.
(cherry picked from commit 2de7c2acf9b1ec85b09027a8bb58bf8512e91c05)
* Add some more unicode related tests (#872)
This has been fixed for sure ever since we switched from attoparsec to
parsec. Parts of it may have been working before that, but there was a
point where this would have failed (see #191).
A regression test never hurt anyone. :)
(cherry picked from commit 5ec7715d418bfac0f26aec6039792a99a6e89370)
* Misc tests (#858)
* More tests
* spliced types
* constructor/pattern argument docs
* strictness marks on fields with argument docs
* latex test cases need seperate directory
* Accept tests
* Additional tests for the identifier parser (#816)
* Add tests for the identifier parser
* docs: Clarify how to delimit identifiers
(cherry picked from commit 0861affeca4d72938f05a2eceddfae2c19199071)
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The parser for pictures hasn't been properly adjusted yet.
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Perf only change:
* don't look up type variable names (they're never in the environment)
* use a difference list for accumulating missing names
* more efficient 'Functor'/'Applicative' instances for 'RnM'
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Perf only change:
* Add a 'SPECIALIZE' pragma to help GHC optimize a 'Data a =>' constraint
* Manually specialize the needlessly general type of 'specializeTyVarBndrs'
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Perf only change:
* avoid needlessly union-ing maps
* avoid synify-ing instances twice
Took this opportunity to add some docs too
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Accumulate explicitly which modules to load for 'attachInstances'
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The old approach to fixing #469, while correct, consumes a lot of
memory. We ended up with a HUGE 'GblRdrEnv' in 'ic_rn_gbl_env'. However,
'getNameToInstancesIndex' takes that environment and compresses it down
to a much smaller 'ModuleSet'.
Now, we compute that 'ModuleSet' explicitly as we process modules. That
way we can just tell 'getNameToInstancesIndex' what modules to load
(instead of it trying to compute that information from the interactive
context).
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After GHC commit
http://git.haskell.org/ghc.git/commit/f265008fb6f70830e7e92ce563f6d83833cef071
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the same type
This also changes the defaulting heuristic for ambiguous identifiers.
We now prefer local names primarily, and type constructors or class
names secondarily.
Partially fixes #854.
(cherry picked from commit d504a2864a4e1982e142cf88c023e7caeea3b76f)
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(cherry picked from commit 73707ed58d879cc04cb644c5dab88c39ca1465b7)
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* Preserve docs on type family instances
The only problem was that the instance location was slightly off
for type family instances.
* Accept output
(cherry picked from commit 133e9c2c168db19c1135479f7ab144c4e33af2a4)
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* Renamer: Warn about ambiguous identifiers
Example:
Warning: 'elem' is ambiguous. It is defined
* in ‘Data.Foldable’
* at /home/simon/tmp/hdk/src/Lib.hs:7:1
You may be able to disambiguate the identifier by qualifying it or
by hiding some imports.
Defaulting to 'elem' defined at /home/simon/tmp/hdk/src/Lib.hs:7:1
Fixes #830.
* Deduplicate warnings
Fixes #832.
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This fixes #836.
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