Monad TcS #
Instance details Defined in TcSMonad Methods (>>=) :: TcS a -> (a -> TcS b) -> TcS b Source # (>>) :: TcS a -> TcS b -> TcS b Source # return :: a -> TcS a Source # fail :: String -> TcS a Source #
Functor TcS #
Instance details Defined in TcSMonad Methods fmap :: (a -> b) -> TcS a -> TcS b Source # (<$) :: a -> TcS b -> TcS a Source #
MonadFail TcS #
Instance details Defined in TcSMonad Methods fail :: String -> TcS a Source #
Applicative TcS #
Instance details Defined in TcSMonad Methods pure :: a -> TcS a Source # (<>) :: TcS (a -> b) -> TcS a -> TcS b Source # liftA2 :: (a -> b -> c) -> TcS a -> TcS b -> TcS c Source # (>) :: TcS a -> TcS b -> TcS b Source # (<*) :: TcS a -> TcS b -> TcS a Source #
MonadUnique TcS #
Instance details Defined in TcSMonad Methods getUniqueSupplyM :: TcS UniqSupply Source # getUniqueM :: TcS Unique Source # getUniquesM :: TcS [Unique] Source #
HasDynFlags TcS #
Instance details Defined in TcSMonad Methods getDynFlags :: TcS DynFlags Source #

runTcS :: TcS a -> TcM (a, EvBindMap) Source #

runTcSDeriveds :: TcS a -> TcM a Source #

This variant of runTcS will keep solving, even when only Deriveds are left around. It also doesn't return any evidence, as callers won't need it.

runTcSWithEvBinds :: EvBindsVar -> TcS a -> TcM a Source #

failTcS :: SDoc -> TcS a Source #

warnTcS :: WarningFlag -> SDoc -> TcS () Source #

addErrTcS :: SDoc -> TcS () Source #

runTcSEqualities :: TcS a -> TcM a Source #

This can deal only with equality constraints.

nestTcS :: TcS a -> TcS a Source #

nestImplicTcS :: EvBindsVar -> TcLevel -> TcS a -> TcS a Source #

setEvBindsTcS :: EvBindsVar -> TcS a -> TcS a Source #

buildImplication :: SkolemInfo -> [TcTyVar] -> [EvVar] -> TcS result -> TcS (Bag Implication, TcEvBinds, result) Source #

runTcPluginTcS :: TcPluginM a -> TcS a Source #

addUsedGRE :: Bool -> GlobalRdrElt -> TcS () Source #

addUsedGREs :: [GlobalRdrElt] -> TcS () Source #

panicTcS :: SDoc -> TcS a Source #

traceTcS :: String -> SDoc -> TcS () Source #

traceFireTcS :: CtEvidence -> SDoc -> TcS () Source #

bumpStepCountTcS :: TcS () Source #

csTraceTcS :: SDoc -> TcS () Source #

wrapErrTcS :: TcM a -> TcS a Source #

wrapWarnTcS :: TcM a -> TcS a Source #

data MaybeNew Source #

Constructors

Fresh CtEvidence
Cached EvTerm

freshGoals :: [MaybeNew] -> [CtEvidence] Source #

isFresh :: MaybeNew -> Bool Source #

getEvTerm :: MaybeNew -> EvTerm Source #

newTcEvBinds :: TcS EvBindsVar Source #

newWantedEq :: CtLoc -> Role -> TcType -> TcType -> TcS (CtEvidence, Coercion) Source #

Make a new equality CtEvidence

emitNewWantedEq :: CtLoc -> Role -> TcType -> TcType -> TcS Coercion Source #

Emit a new Wanted equality into the work-list

newWanted :: CtLoc -> PredType -> TcS MaybeNew Source #

newWantedEvVar :: CtLoc -> TcPredType -> TcS MaybeNew Source #

newWantedNC :: CtLoc -> PredType -> TcS CtEvidence Source #

newWantedEvVarNC :: CtLoc -> TcPredType -> TcS CtEvidence Source #

newDerivedNC :: CtLoc -> TcPredType -> TcS CtEvidence Source #

newBoundEvVarId :: TcPredType -> EvTerm -> TcS EvVar Source #

Make a new Id of the given type, bound (in the monad's EvBinds) to the given term

unifyTyVar :: TcTyVar -> TcType -> TcS () Source #

unflattenFmv :: TcTyVar -> TcType -> TcS () Source #

reportUnifications :: TcS a -> TcS (Int, a) Source #

setEvBind :: EvBind -> TcS () Source #

setWantedEq :: TcEvDest -> Coercion -> TcS () Source #

Equalities only

setEqIfWanted :: CtEvidence -> Coercion -> TcS () Source #

Equalities only

setWantedEvTerm :: TcEvDest -> EvTerm -> TcS () Source #

Good for equalities and non-equalities

setWantedEvBind :: EvVar -> EvTerm -> TcS () Source #

setEvBindIfWanted :: CtEvidence -> EvTerm -> TcS () Source #

newEvVar :: TcPredType -> TcS EvVar Source #

newGivenEvVar :: CtLoc -> (TcPredType, EvTerm) -> TcS CtEvidence Source #

newGivenEvVars :: CtLoc -> [(TcPredType, EvTerm)] -> TcS [CtEvidence] Source #

emitNewDeriveds :: CtLoc -> [TcPredType] -> TcS () Source #

emitNewDerivedEq :: CtLoc -> Role -> TcType -> TcType -> TcS () Source #

checkReductionDepth Source #

Arguments

:: CtLoc
-> TcType	type being reduced
-> TcS ()

Checks if the depth of the given location is too much. Fails if it's too big, with an appropriate error message.

getInstEnvs :: TcS InstEnvs Source #

getFamInstEnvs :: TcS (FamInstEnv, FamInstEnv) Source #

getTopEnv :: TcS HscEnv Source #

getGblEnv :: TcS TcGblEnv Source #

getLclEnv :: TcS TcLclEnv Source #

getTcEvBindsVar :: TcS EvBindsVar Source #

getTcLevel :: TcS TcLevel Source #

getTcEvTyCoVars :: EvBindsVar -> TcS TyCoVarSet Source #

getTcEvBindsMap :: EvBindsVar -> TcS EvBindMap Source #

setTcEvBindsMap :: EvBindsVar -> EvBindMap -> TcS () Source #

tcLookupClass :: Name -> TcS Class Source #

tcLookupId :: Name -> TcS Id Source #

data InertSet Source #

Constructors

IS
Fields inert_cans :: InertCans inert_fsks :: [(TcTyVar, TcType)] inert_flat_cache :: ExactFunEqMap (TcCoercion, TcType, CtFlavour) inert_solved_dicts :: DictMap CtEvidence

Instances

Outputable InertSet #
Instance details Defined in TcSMonad Methods ppr :: InertSet -> SDoc Source # pprPrec :: Rational -> InertSet -> SDoc Source #

data InertCans Source #

Constructors

IC
Fields inert_eqs :: InertEqs inert_funeqs :: FunEqMap Ct inert_dicts :: DictMap Ct inert_safehask :: DictMap Ct See Note [Safe Haskell Overlapping Instances Implementation] in TcSimplify inert_irreds :: Cts inert_count :: Int

Instances

Outputable InertCans #
Instance details Defined in TcSMonad Methods ppr :: InertCans -> SDoc Source # pprPrec :: Rational -> InertCans -> SDoc Source #

updInertTcS :: (InertSet -> InertSet) -> TcS () Source #

updInertCans :: (InertCans -> InertCans) -> TcS () Source #

updInertDicts :: (DictMap Ct -> DictMap Ct) -> TcS () Source #

updInertIrreds :: (Cts -> Cts) -> TcS () Source #

getNoGivenEqs :: TcLevel -> [TcTyVar] -> TcS (Bool, Cts) Source #

setInertCans :: InertCans -> TcS () Source #

getInertEqs :: TcS (DTyVarEnv EqualCtList) Source #

getInertCans :: TcS InertCans Source #

getInertGivens :: TcS [Ct] Source #

getInertInsols :: TcS Cts Source #

getTcSInerts :: TcS InertSet Source #

setTcSInerts :: InertSet -> TcS () Source #

matchableGivens :: CtLoc -> PredType -> InertSet -> Cts Source #

Returns Given constraints that might, potentially, match the given pred. This is used when checking to see if a Given might overlap with an instance. See Note [Instance and Given overlap] in TcInteract.

prohibitedSuperClassSolve :: CtLoc -> CtLoc -> Bool Source #

getUnsolvedInerts :: TcS (Bag Implication, Cts, Cts, Cts) Source #

removeInertCts :: [Ct] -> InertCans -> InertCans Source #

Remove inert constraints from the InertCans, for use when a typechecker plugin wishes to discard a given.

getPendingScDicts :: TcS [Ct] Source #

addInertCan :: Ct -> TcS () Source #

addInertEq :: Ct -> TcS () Source #

insertFunEq :: FunEqMap a -> TyCon -> [Type] -> a -> FunEqMap a Source #

emitWorkNC :: [CtEvidence] -> TcS () Source #

emitWork :: [Ct] -> TcS () Source #

isImprovable :: CtEvidence -> Bool Source #

kickOutAfterUnification :: TcTyVar -> TcS Int Source #

addInertSafehask :: InertCans -> Ct -> InertCans Source #

insertSafeOverlapFailureTcS :: Ct -> TcS () Source #

updInertSafehask :: (DictMap Ct -> DictMap Ct) -> TcS () Source #

getSafeOverlapFailures :: TcS Cts Source #

type DictMap a = TcAppMap a Source #

emptyDictMap :: DictMap a Source #

lookupInertDict :: InertCans -> CtLoc -> Class -> [Type] -> Maybe CtEvidence Source #

Look up a dictionary inert. NB: the returned CtEvidence might not match the input exactly. Note [Use loose types in inert set].

findDictsByClass :: DictMap a -> Class -> Bag a Source #

addDict :: DictMap a -> Class -> [Type] -> a -> DictMap a Source #

addDictsByClass :: DictMap Ct -> Class -> Bag Ct -> DictMap Ct Source #

delDict :: DictMap a -> Class -> [Type] -> DictMap a Source #

foldDicts :: (a -> b -> b) -> DictMap a -> b -> b Source #

filterDicts :: (Ct -> Bool) -> DictMap Ct -> DictMap Ct Source #

findDict :: DictMap a -> CtLoc -> Class -> [Type] -> Maybe a Source #

type EqualCtList = [Ct] Source #

findTyEqs :: InertCans -> TyVar -> EqualCtList Source #

foldTyEqs :: (Ct -> b -> b) -> InertEqs -> b -> b Source #

isInInertEqs :: DTyVarEnv EqualCtList -> TcTyVar -> TcType -> Bool Source #

lookupFlattenTyVar :: InertEqs -> TcTyVar -> TcType Source #

lookupInertTyVar :: InertEqs -> TcTyVar -> Maybe TcType Source #

addSolvedDict :: CtEvidence -> Class -> [Type] -> TcS () Source #

lookupSolvedDict :: InertSet -> CtLoc -> Class -> [Type] -> Maybe CtEvidence Source #

Look up a solved inert. NB: the returned CtEvidence might not match the input exactly. See Note [Use loose types in inert set].

foldIrreds :: (Ct -> b -> b) -> Cts -> b -> b Source #

lookupFlatCache :: TyCon -> [Type] -> TcS (Maybe (TcCoercion, TcType, CtFlavour)) Source #

extendFlatCache :: TyCon -> [Type] -> (TcCoercion, TcType, CtFlavour) -> TcS () Source #

newFlattenSkolem :: CtFlavour -> CtLoc -> TyCon -> [TcType] -> TcS (CtEvidence, Coercion, TcTyVar) Source #

updInertFunEqs :: (FunEqMap Ct -> FunEqMap Ct) -> TcS () Source #

findFunEq :: FunEqMap a -> TyCon -> [Type] -> Maybe a Source #

findFunEqsByTyCon :: FunEqMap a -> TyCon -> [a] Source #

instDFunType :: DFunId -> [DFunInstType] -> TcS ([TcType], TcThetaType) Source #

newFlexiTcSTy :: Kind -> TcS TcType Source #

instFlexi :: [TKVar] -> TcS TCvSubst Source #

instFlexiX :: TCvSubst -> [TKVar] -> TcS TCvSubst Source #

cloneMetaTyVar :: TcTyVar -> TcS TcTyVar Source #

demoteUnfilledFmv :: TcTyVar -> TcS () Source #

tcInstType Source #

Arguments

:: ([TyVar] -> TcM (TCvSubst, [TcTyVar]))	How to instantiate the type variables
-> Id	Type to instantiate
-> TcS ([(Name, TcTyVar)], TcThetaType, TcType)	Result (type vars, preds (incl equalities), rho)

tcInstSkolTyVarsX :: TCvSubst -> [TyVar] -> TcS (TCvSubst, [TcTyVar]) Source #

data TcLevel Source #

Instances

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