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Within LTS Haskell 24.65 (ghc-9.10.3)

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  1. lastMaybe :: [a] -> Maybe a

    ghc GHC.Utils.Misc

    No documentation available.

  2. mapMaybe' :: Foldable f => (a -> Maybe b) -> f a -> [b]

    ghc GHC.Utils.Misc

    No documentation available.

  3. mapMaybeM :: Applicative m => (a -> m (Maybe b)) -> [a] -> m [b]

    ghc GHC.Utils.Monad

    Applicative version of mapMaybe

  4. bndrIsJoin_maybe :: OutputableBndr a => a -> JoinPointHood

    ghc GHC.Utils.Outputable

    No documentation available.

  5. assertPprMaybe :: HasCallStack => Maybe SDoc -> a -> a

    ghc GHC.Utils.Panic

    No documentation available.

  6. annProvenanceName_maybe :: UnXRec p => AnnProvenance p -> Maybe (IdP p)

    ghc Language.Haskell.Syntax.Decls

    No documentation available.

  7. qualifiedDoModuleName_maybe :: HsStmtContext fn -> Maybe ModuleName

    ghc Language.Haskell.Syntax.Expr

    No documentation available.

  8. isFieldMaybe :: FieldDef -> Bool

    persistent Database.Persist.FieldDef

    Check if the field is `Maybe a`

  9. ByMaybeAttr :: WhyNullable

    persistent Database.Persist.Types

    No documentation available.

  10. FieldAttrMaybe :: FieldAttr

    persistent Database.Persist.Types

    The Maybe keyword goes after the type. This indicates that the column is nullable, and the generated Haskell code will have a Maybe type for it. Example: 

    User
name Text Maybe

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