| Safe Haskell | None |
|---|---|
| Language | Haskell2010 |
DsMonad
Contents
- type DsM = TcRnIf DsGblEnv DsLclEnv
- mapM :: Traversable t => forall m a b. Monad m => (a -> m b) -> t a -> m (t b)
- mapAndUnzipM :: Applicative m => (a -> m (b, c)) -> [a] -> m ([b], [c])
- initDs :: HscEnv -> Module -> GlobalRdrEnv -> TypeEnv -> FamInstEnv -> DsM a -> IO (Messages, Maybe a)
- initDsTc :: DsM a -> TcM a
- initTcDsForSolver :: TcM a -> DsM (Messages, Maybe a)
- fixDs :: (a -> DsM a) -> DsM a
- foldlM :: Monad m => (a -> b -> m a) -> a -> [b] -> m a
- foldrM :: Monad m => (b -> a -> m a) -> a -> [b] -> m a
- whenGOptM :: GeneralFlag -> TcRnIf gbl lcl () -> TcRnIf gbl lcl ()
- unsetGOptM :: GeneralFlag -> TcRnIf gbl lcl a -> TcRnIf gbl lcl a
- unsetWOptM :: WarningFlag -> TcRnIf gbl lcl a -> TcRnIf gbl lcl a
- class Functor f => Applicative f where
- (<$>) :: Functor f => (a -> b) -> f a -> f b
- newLocalName :: Name -> TcM Name
- duplicateLocalDs :: Id -> DsM Id
- newSysLocalDs :: Type -> DsM Id
- newSysLocalsDs :: [Type] -> DsM [Id]
- newUniqueId :: Id -> Type -> DsM Id
- newFailLocalDs :: Type -> DsM Id
- newPredVarDs :: PredType -> DsM Var
- getSrcSpanDs :: DsM SrcSpan
- putSrcSpanDs :: SrcSpan -> DsM a -> DsM a
- mkPrintUnqualifiedDs :: DsM PrintUnqualified
- newUnique :: TcRnIf gbl lcl Unique
- data UniqSupply
- newUniqueSupply :: TcRnIf gbl lcl UniqSupply
- getGhcModeDs :: DsM GhcMode
- dsGetFamInstEnvs :: DsM FamInstEnvs
- dsGetStaticBindsVar :: DsM (IORef [(Fingerprint, (Id, CoreExpr))])
- dsLookupGlobal :: Name -> DsM TyThing
- dsLookupGlobalId :: Name -> DsM Id
- dsDPHBuiltin :: (PArrBuiltin -> a) -> DsM a
- dsLookupTyCon :: Name -> DsM TyCon
- dsLookupDataCon :: Name -> DsM DataCon
- data PArrBuiltin = PArrBuiltin {
- lengthPVar :: Var
- replicatePVar :: Var
- singletonPVar :: Var
- mapPVar :: Var
- filterPVar :: Var
- zipPVar :: Var
- crossMapPVar :: Var
- indexPVar :: Var
- emptyPVar :: Var
- appPVar :: Var
- enumFromToPVar :: Var
- enumFromThenToPVar :: Var
- dsLookupDPHRdrEnv :: OccName -> DsM Name
- dsLookupDPHRdrEnv_maybe :: OccName -> DsM (Maybe Name)
- dsInitPArrBuiltin :: DsM a -> DsM a
- type DsMetaEnv = NameEnv DsMetaVal
- data DsMetaVal
- dsGetMetaEnv :: DsM (NameEnv DsMetaVal)
- dsLookupMetaEnv :: Name -> DsM (Maybe DsMetaVal)
- dsExtendMetaEnv :: DsMetaEnv -> DsM a -> DsM a
- getDictsDs :: DsM (Bag EvVar)
- addDictsDs :: Bag EvVar -> DsM a -> DsM a
- getTmCsDs :: DsM (Bag SimpleEq)
- addTmCsDs :: Bag SimpleEq -> DsM a -> DsM a
- incrCheckPmIterDs :: DsM ()
- resetPmIterDs :: DsM ()
- type DsWarning = (SrcSpan, SDoc)
- warnDs :: WarnReason -> SDoc -> DsM ()
- failWithDs :: SDoc -> DsM a
- discardWarningsDs :: DsM a -> DsM a
- data DsMatchContext = DsMatchContext (HsMatchContext Name) SrcSpan
- data EquationInfo = EqnInfo {
- eqn_pats :: [Pat Id]
- eqn_rhs :: MatchResult
- data MatchResult = MatchResult CanItFail (CoreExpr -> DsM CoreExpr)
- type DsWrapper = CoreExpr -> CoreExpr
- idDsWrapper :: DsWrapper
- data CanItFail
- orFail :: CanItFail -> CanItFail -> CanItFail
Documentation
mapM :: Traversable t => forall m a b. Monad m => (a -> m b) -> t a -> m (t b) Source #
Map each element of a structure to a monadic action, evaluate
these actions from left to right, and collect the results. For
a version that ignores the results see mapM_.
mapAndUnzipM :: Applicative m => (a -> m (b, c)) -> [a] -> m ([b], [c]) Source #
The mapAndUnzipM function maps its first argument over a list, returning
the result as a pair of lists. This function is mainly used with complicated
data structures or a state-transforming monad.
initDs :: HscEnv -> Module -> GlobalRdrEnv -> TypeEnv -> FamInstEnv -> DsM a -> IO (Messages, Maybe a) Source #
unsetGOptM :: GeneralFlag -> TcRnIf gbl lcl a -> TcRnIf gbl lcl a Source #
unsetWOptM :: WarningFlag -> TcRnIf gbl lcl a -> TcRnIf gbl lcl a Source #
class Functor f => Applicative f where Source #
A functor with application, providing operations to
A minimal complete definition must include implementations of these functions satisfying the following laws:
- identity
pureid<*>v = v- composition
pure(.)<*>u<*>v<*>w = u<*>(v<*>w)- homomorphism
puref<*>purex =pure(f x)- interchange
u
<*>purey =pure($y)<*>u
The other methods have the following default definitions, which may be overridden with equivalent specialized implementations:
As a consequence of these laws, the Functor instance for f will satisfy
If f is also a Monad, it should satisfy
(which implies that pure and <*> satisfy the applicative functor laws).
Methods
Lift a value.
(<*>) :: f (a -> b) -> f a -> f b infixl 4 Source #
Sequential application.
(*>) :: f a -> f b -> f b infixl 4 Source #
Sequence actions, discarding the value of the first argument.
(<*) :: f a -> f b -> f a infixl 4 Source #
Sequence actions, discarding the value of the second argument.
Instances
(<$>) :: Functor f => (a -> b) -> f a -> f b infixl 4 Source #
An infix synonym for fmap.
The name of this operator is an allusion to $.
Note the similarities between their types:
($) :: (a -> b) -> a -> b (<$>) :: Functor f => (a -> b) -> f a -> f b
Whereas $ is function application, <$> is function
application lifted over a Functor.
Examples
Convert from a Maybe IntMaybe Stringshow:
>>>show <$> NothingNothing>>>show <$> Just 3Just "3"
Convert from an Either Int IntEither IntString using show:
>>>show <$> Left 17Left 17>>>show <$> Right 17Right "17"
Double each element of a list:
>>>(*2) <$> [1,2,3][2,4,6]
Apply even to the second element of a pair:
>>>even <$> (2,2)(2,True)
data UniqSupply Source #
A value of type UniqSupply is unique, and it can
supply one distinct Unique. Also, from the supply, one can
also manufacture an arbitrary number of further UniqueSupply values,
which will be distinct from the first and from all others.
newUniqueSupply :: TcRnIf gbl lcl UniqSupply Source #
dsGetStaticBindsVar :: DsM (IORef [(Fingerprint, (Id, CoreExpr))]) Source #
Gets a reference to the SPT entries created so far.
dsDPHBuiltin :: (PArrBuiltin -> a) -> DsM a Source #
Get a name from Data.Array.Parallel for the desugarer, from the ds_parr_bi component of the
global desugerar environment.
data PArrBuiltin Source #
Constructors
| PArrBuiltin | |
Fields
| |
dsInitPArrBuiltin :: DsM a -> DsM a Source #
incrCheckPmIterDs :: DsM () Source #
Increase the counter for elapsed pattern match check iterations. If the current counter is already over the limit, fail
resetPmIterDs :: DsM () Source #
Reset the counter for pattern match check iterations to zero
failWithDs :: SDoc -> DsM a Source #
discardWarningsDs :: DsM a -> DsM a Source #
data DsMatchContext Source #
Constructors
| DsMatchContext (HsMatchContext Name) SrcSpan |
data EquationInfo Source #
Instances
data MatchResult Source #
Constructors
| MatchResult CanItFail (CoreExpr -> DsM CoreExpr) |