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Allow the user to explicitly bind type/kind variables in type and data
family instances (including associated instances), closed type family
equations, and RULES pragmas. Follows the specification of GHC
Proposal 0007, also fixes #2600. Advised by Richard Eisenberg.
This modifies the Template Haskell AST -- old code may break!
Other Changes:
- convert HsRule to a record
- make rnHsSigWcType more general
- add repMaybe to DsMeta
Includes submodule update for Haddock.
Test Plan: validate
Reviewers: goldfire, bgamari, alanz
Subscribers: simonpj, RyanGlScott, goldfire, rwbarton,
thomie, mpickering, carter
GHC Trac Issues: #2600, #14268
Differential Revision: https://phabricator.haskell.org/D4894
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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
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The following commits were reverted prior to the release of GHC 8.4.1,
because the time to derive Data instances was too long [1].
438dd1cbba13d35f3452b4dcef3f94ce9a216905 Phab:D4147
e3ec2e7ae94524ebd111963faf34b84d942265b4 Phab:D4177
47ad6578ea460999b53eb4293c3a3b3017a56d65 Phab:D4186
The work is continuing, as the minimum bootstrap compiler is now
GHC 8.2.1, and this allows Plan B[2] for instances to be used. This
will land in a following commit.
Updates Haddock submodule
[1] https://ghc.haskell.org/trac/ghc/wiki/ImplementingTreesThatGrow/Instances
[2] https://ghc.haskell.org/trac/ghc/wiki/ImplementingTreesThatGrow/Instances#PLANB
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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 47ad6578ea460999b53eb4293c3a3b3017a56d65.
This reverts commit e3ec2e7ae94524ebd111963faf34b84d942265b4.
This reverts commit 438dd1cbba13d35f3452b4dcef3f94ce9a216905.
This reverts commit 0ff152c9e633accca48815e26e59d1af1fe44ceb.
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See https://ghc.haskell.org/trac/ghc/wiki/ImplementingTreesThatGrow
Trees that grow extension points are added for
- HsExpr
Updates haddock submodule
Test Plan: ./validate
Reviewers: bgamari, goldfire
Subscribers: rwbarton, thomie, shayan-najd, mpickering
Differential Revision: https://phabricator.haskell.org/D4177
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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
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Summary:
Certain syntactic elements have integers in them, such as fixity
specifications, SPECIALISE pragmas and so on.
The lexer will accept mult-radix literals, with arbitrary leading zeros
in these.
Bring in a SourceText field to each affected AST element to capture the
original literal text for use with API Annotations.
Affected hsSyn elements are
```
-- See note [Pragma source text]
data Activation = NeverActive
| AlwaysActive
| ActiveBefore SourceText PhaseNum
-- Active only *strictly before* this phase
| ActiveAfter SourceText PhaseNum
-- Active in this phase and later
deriving( Eq, Data, Typeable )
-- Eq used in comparing rules in HsDecls
data Fixity = Fixity SourceText Int FixityDirection
-- Note [Pragma source text]
deriving (Data, Typeable)
```
and
```
| HsTickPragma -- A pragma introduced tick
SourceText -- Note [Pragma source text] in BasicTypes
(StringLiteral,(Int,Int),(Int,Int))
-- external span for this tick
((SourceText,SourceText),(SourceText,SourceText))
-- Source text for the four integers used in the span.
-- See note [Pragma source text] in BasicTypes
(LHsExpr id)
```
Updates haddock submodule
Test Plan: ./validate
Reviewers: goldfire, bgamari, austin
Reviewed By: bgamari
Subscribers: thomie, mpickering
Differential Revision: https://phabricator.haskell.org/D1781
GHC Trac Issues: #11430
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Summary:
Phab:D907 introduced SourceText for a number of data types, by replacing
FastString with (SourceText,FastString). Since this has an Outputable
instance, no warnings are generated when ppr is called on it, but
unexpected output is generated. See Phab:D1096 for an example of this.
Replace the (SourceText,FastString) tuples with a new data type,
```lang=hs
data StringLiteral = StringLiteral SourceText FastString
```
Update haddock submodule accordingly
Test Plan: ./validate
Reviewers: hvr, austin, rwbarton, trofi, bgamari
Reviewed By: trofi, bgamari
Subscribers: thomie, trofi, rwbarton, mpickering
Differential Revision: https://phabricator.haskell.org/D1101
GHC Trac Issues: #10692
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Summary:
The strings used in a WARNING pragma are captured via
strings :: { Located ([AddAnn],[Located FastString]) }
: STRING { sL1 $1 ([],[L (gl $1) (getSTRING $1)]) }
..
The STRING token has a method getSTRINGs that returns the original
source text for a string.
A warning of the form
{-# WARNING Logic
, mkSolver
, mkSimpleSolver
, mkSolverForLogic
, solverSetParams
, solverPush
, solverPop
, solverReset
, solverGetNumScopes
, solverAssertCnstr
, solverAssertAndTrack
, solverCheck
, solverCheckAndGetModel
, solverGetReasonUnknown
"New Z3 API support is still incomplete and fragile: \
\you may experience segmentation faults!"
#-}
returns the concatenated warning string rather than the original source.
This patch now deals with all remaining instances of getSTRING to bring
in a SourceText for each.
This updates the haddock submodule as well, for the AST change.
Test Plan: ./validate
Reviewers: hvr, austin, goldfire
Reviewed By: austin
Subscribers: bgamari, thomie, mpickering
Differential Revision: https://phabricator.haskell.org/D907
GHC Trac Issues: #10313
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