reflex-0.6.3: Higher-order Functional Reactive Programming

Safe HaskellNone
LanguageHaskell98

Reflex.Query.Class

Description

 
Synopsis

Documentation

class (Monoid (QueryResult a), Semigroup (QueryResult a)) => Query a where Source #

A Query can be thought of as a declaration of interest in some set of data. A QueryResult is the set of data associated with that interest set. The crop function provides a way to determine what part of a given QueryResult is relevant to a given Query.

Associated Types

type QueryResult a :: * Source #

Methods

crop :: a -> QueryResult a -> QueryResult a Source #

Instances
(Ord k, Query v) => Query (MonoidalMap k v) Source # 
Instance details

Defined in Reflex.Query.Class

Associated Types

type QueryResult (MonoidalMap k v) :: Type Source #

data QueryMorphism q q' Source #

QueryMorphism's must be group homomorphisms when acting on the query type and compatible with the query relationship when acting on the query result.

Instances
Category QueryMorphism Source # 
Instance details

Defined in Reflex.Query.Class

Methods

id :: QueryMorphism a a #

(.) :: QueryMorphism b c -> QueryMorphism a b -> QueryMorphism a c #

newtype SelectedCount Source #

This type can be used to track of the frequency of interest in a given Query. See note on combineSelectedCounts

Constructors

SelectedCount 

Fields

Instances
Bounded SelectedCount Source # 
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Defined in Reflex.Query.Class

Enum SelectedCount Source # 
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Defined in Reflex.Query.Class

Eq SelectedCount Source # 
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Integral SelectedCount Source # 
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Data SelectedCount Source # 
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Defined in Reflex.Query.Class

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> SelectedCount -> c SelectedCount #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c SelectedCount #

toConstr :: SelectedCount -> Constr #

dataTypeOf :: SelectedCount -> DataType #

dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c SelectedCount) #

dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c SelectedCount) #

gmapT :: (forall b. Data b => b -> b) -> SelectedCount -> SelectedCount #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> SelectedCount -> r #

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> SelectedCount -> r #

gmapQ :: (forall d. Data d => d -> u) -> SelectedCount -> [u] #

gmapQi :: Int -> (forall d. Data d => d -> u) -> SelectedCount -> u #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> SelectedCount -> m SelectedCount #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> SelectedCount -> m SelectedCount #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> SelectedCount -> m SelectedCount #

Num SelectedCount Source # 
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Defined in Reflex.Query.Class

Ord SelectedCount Source # 
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Defined in Reflex.Query.Class

Read SelectedCount Source # 
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Defined in Reflex.Query.Class

Real SelectedCount Source # 
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Show SelectedCount Source # 
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Ix SelectedCount Source # 
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Semigroup SelectedCount Source # 
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Monoid SelectedCount Source # 
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Storable SelectedCount Source # 
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Bits SelectedCount Source # 
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FiniteBits SelectedCount Source # 
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Additive SelectedCount Source # 
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Group SelectedCount Source # 
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Defined in Reflex.Query.Class

combineSelectedCounts :: SelectedCount -> SelectedCount -> Maybe SelectedCount Source #

The SemigroupMonoidGroup instances for a Query containing SelectedCounts should use this function which returns Nothing if the result is 0. This allows the pruning of leaves of the Query that are no longer wanted.

class (Group q, Additive q, Query q) => MonadQuery t q m | m -> q t where Source #

A class that allows sending of Querys and retrieval of QueryResults. See queryDyn for a commonly used interface.

Instances
(Monad m, MonadQuery t q m) => MonadQuery t q (ReaderT r m) Source # 
Instance details

Defined in Reflex.Query.Class

(MonadQuery t q m, Monad m) => MonadQuery t q (EventWriterT t w m) Source # 
Instance details

Defined in Reflex.EventWriter.Base

(Monad m, Group q, Additive q, Query q, Reflex t) => MonadQuery t q (QueryT t q m) Source # 
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Defined in Reflex.Query.Base

(MonadQuery t q m, Monad m) => MonadQuery t q (DynamicWriterT t w m) Source # 
Instance details

Defined in Reflex.DynamicWriter.Base

(MonadQuery t q m, Monad m) => MonadQuery t q (BehaviorWriterT t w m) Source # 
Instance details

Defined in Reflex.BehaviorWriter.Base

tellQueryDyn :: (Reflex t, MonadQuery t q m) => Dynamic t q -> m () Source #

Produce and send an Incremental Query from a Dynamic Query.

queryDyn :: (Reflex t, Monad m, MonadQuery t q m) => Dynamic t q -> m (Dynamic t (QueryResult q)) Source #

Retrieve Dynamically updating QueryResults for a Dynamically updating Query.

mapQuery :: QueryMorphism q q' -> q -> q' Source #

Apply a QueryMorphism to a Query