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MaybeT :: m (Maybe a) -> MaybeT (m :: Type -> Type) amonadology Control.Monad.Ology.Specific.MaybeT No documentation available.
module Opaleye.Internal.
MaybeFields No documentation available.
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opaleye Opaleye.Internal.MaybeFields The Opaleye analogue of Maybe. A value of type MaybeFields a either contains a value of type a, or it contains nothing.
MaybeFields :: Column SqlBool -> fields -> MaybeFields fieldsopaleye Opaleye.Internal.MaybeFields No documentation available.
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MaybeFields is Opaleye's analogue to Maybe. You probably won't want to create values of type MaybeFields directly; instead they will appear as the result of left/right/outer join-like operations, such as optionalRestrict and optional.
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opaleye Opaleye.MaybeFields The Opaleye analogue of Maybe. A value of type MaybeFields a either contains a value of type a, or it contains nothing.
newtype
MaybeVoid# (a :: ZeroBitType)unlifted Data.Maybe.Void Unboxed variant of Maybe. The thing possibly contained by Just has a void runtime representation. Rather than using a sum, like the more general Maybe# does, this represents Nothing with 0 and Just with 1. It is recommended that the data constructor not be used directly. Prefer the two pattern synonyms.
MaybeVoid# :: forall (a :: ZeroBitType) . Word# -> MaybeVoid# aunlifted Data.Maybe.Void No documentation available.
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unlifted Data.Maybe.Word16 No documentation available.
MaybeWord16# :: Word# -> MaybeWord16#unlifted Data.Maybe.Word16 No documentation available.