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Split queryF from query #694

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Split queryF from query #694

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14 changes: 13 additions & 1 deletion src/Halogen/Query/HalogenM.purs
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Original file line number Diff line number Diff line change
Expand Up @@ -137,7 +137,19 @@ query
-> slot
-> query a
-> HalogenM state action slots output m (Maybe a)
query label p q = HalogenM $ liftF $ ChildQuery $ CQ.mkChildQueryBox $
query label p q = HalogenM $ liftF $ queryF label p q

-- | An alternative to `query` which does not wrap the HalogenF in free
queryF
:: forall state action output m label slots query output' slot a _1
. Row.Cons label (Slot query output' slot) _1 slots
=> IsSymbol label
=> Ord slot
=> SProxy label
-> slot
-> query a
-> HalogenF state action slots output m (Maybe a)
queryF label p q = ChildQuery $ CQ.mkChildQueryBox $
CQ.ChildQuery (\k → maybe (pure Nothing) k <<< Slot.lookup label p) q identity

-- | Sends a query to all children of a component at a given slot label.
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