Safe Haskell	None
Language	Haskell2010

TcHoleFitTypes

Synopsis

data TypedHole = TyH {
- tyHRelevantCts :: Cts
- tyHImplics :: [Implication]
- tyHCt :: Maybe Ct
}
data HoleFit
- = HoleFit {
  - hfId :: Id
  - hfCand :: HoleFitCandidate
  - hfType :: TcType
  - hfRefLvl :: Int
  - hfWrap :: [TcType]
  - hfMatches :: [TcType]
  - hfDoc :: Maybe HsDocString
  }
- | RawHoleFit SDoc
data HoleFitCandidate
- = IdHFCand Id
- | NameHFCand Name
- | GreHFCand GlobalRdrElt
type CandPlugin = TypedHole -> [HoleFitCandidate] -> TcM [HoleFitCandidate]
type FitPlugin = TypedHole -> [HoleFit] -> TcM [HoleFit]
data HoleFitPlugin = HoleFitPlugin {
- candPlugin :: CandPlugin
- fitPlugin :: FitPlugin
}
data HoleFitPluginR = HoleFitPluginR {
- hfPluginInit :: TcM (TcRef s)
- hfPluginRun :: TcRef s -> HoleFitPlugin
- hfPluginStop :: TcRef s -> TcM ()
}
hfIsLcl :: HoleFit -> Bool
pprHoleFitCand :: HoleFitCandidate -> SDoc

Documentation

data TypedHole Source #

Constructors

TyH
Fields tyHRelevantCts :: Cts Any relevant Cts to the hole tyHImplics :: [Implication] The nested implications of the hole with the innermost implication first. tyHCt :: Maybe Ct The hole constraint itself, if available.

Instances

Outputable TypedHole Source #
Instance details Defined in TcHoleFitTypes Methods ppr :: TypedHole -> SDoc Source # pprPrec :: Rational -> TypedHole -> SDoc Source #

data HoleFit Source #

HoleFit is the type we use for valid hole fits. It contains the element that was checked, the Id of that element as found by tcLookup, and the refinement level of the fit, which is the number of extra argument holes that this fit uses (e.g. if hfRefLvl is 2, the fit is for `Id _ _`).

Constructors

HoleFit
Fields hfId :: Id The elements id in the TcM hfCand :: HoleFitCandidate The candidate that was checked. hfType :: TcType The type of the id, possibly zonked. hfRefLvl :: Int The number of holes in this fit. hfWrap :: [TcType] The wrapper for the match. hfMatches :: [TcType] What the refinement variables got matched with, if anything hfDoc :: Maybe HsDocString Documentation of this HoleFit, if available.
RawHoleFit SDoc	A fit that is just displayed as is. Here so thatHoleFitPlugins can inject any fit they want.

Instances

Eq HoleFit Source #
Instance details Defined in TcHoleFitTypes Methods (==) :: HoleFit -> HoleFit -> Bool # (/=) :: HoleFit -> HoleFit -> Bool #
Ord HoleFit Source #
Instance details Defined in TcHoleFitTypes Methods compare :: HoleFit -> HoleFit -> Ordering # (<) :: HoleFit -> HoleFit -> Bool # (<=) :: HoleFit -> HoleFit -> Bool # (>) :: HoleFit -> HoleFit -> Bool # (>=) :: HoleFit -> HoleFit -> Bool # max :: HoleFit -> HoleFit -> HoleFit # min :: HoleFit -> HoleFit -> HoleFit #
Outputable HoleFit Source #
Instance details Defined in TcHoleFitTypes Methods ppr :: HoleFit -> SDoc Source # pprPrec :: Rational -> HoleFit -> SDoc Source #

data HoleFitCandidate Source #

HoleFitCandidates are passed to hole fit plugins and then checked whether they fit a given typed-hole.

Constructors

IdHFCand Id
NameHFCand Name
GreHFCand GlobalRdrElt

Instances

Eq HoleFitCandidate Source #
Instance details Defined in TcHoleFitTypes Methods (==) :: HoleFitCandidate -> HoleFitCandidate -> Bool # (/=) :: HoleFitCandidate -> HoleFitCandidate -> Bool #
Ord HoleFitCandidate Source #
Instance details Defined in TcHoleFitTypes Methods compare :: HoleFitCandidate -> HoleFitCandidate -> Ordering # (<) :: HoleFitCandidate -> HoleFitCandidate -> Bool # (<=) :: HoleFitCandidate -> HoleFitCandidate -> Bool # (>) :: HoleFitCandidate -> HoleFitCandidate -> Bool # (>=) :: HoleFitCandidate -> HoleFitCandidate -> Bool # max :: HoleFitCandidate -> HoleFitCandidate -> HoleFitCandidate # min :: HoleFitCandidate -> HoleFitCandidate -> HoleFitCandidate #
Outputable HoleFitCandidate Source #
Instance details Defined in TcHoleFitTypes Methods ppr :: HoleFitCandidate -> SDoc Source # pprPrec :: Rational -> HoleFitCandidate -> SDoc Source #
HasOccName HoleFitCandidate Source #
Instance details Defined in TcHoleFitTypes Methods occName :: HoleFitCandidate -> OccName Source #
NamedThing HoleFitCandidate Source #
Instance details Defined in TcHoleFitTypes Methods getOccName :: HoleFitCandidate -> OccName Source # getName :: HoleFitCandidate -> Name Source #

type CandPlugin = TypedHole -> [HoleFitCandidate] -> TcM [HoleFitCandidate] Source #

A plugin for modifying the candidate hole fits *before* they're checked.

type FitPlugin = TypedHole -> [HoleFit] -> TcM [HoleFit] Source #

A plugin for modifying hole fits *after* they've been found.

data HoleFitPlugin Source #

A HoleFitPlugin is a pair of candidate and fit plugins.

Constructors

HoleFitPlugin
Fields candPlugin :: CandPlugin fitPlugin :: FitPlugin

data HoleFitPluginR Source #

HoleFitPluginR adds a TcRef to hole fit plugins so that plugins can track internal state. Note the existential quantification, ensuring that the state cannot be modified from outside the plugin.

Constructors

HoleFitPluginR
Fields hfPluginInit :: TcM (TcRef s) Initializes the TcRef to be passed to the plugin hfPluginRun :: TcRef s -> HoleFitPlugin The function defining the plugin itself hfPluginStop :: TcRef s -> TcM () Cleanup of state, guaranteed to be called even on error

hfIsLcl :: HoleFit -> Bool Source #

pprHoleFitCand :: HoleFitCandidate -> SDoc Source #