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1. mapMaybe :: (a -> Maybe b) -> [a] -> [b]

   incipit-base	Incipit.Base

   The mapMaybe function is a version of map which can throw out elements. In particular, the functional argument returns something of type Maybe b. If this is Nothing, no element is added on to the result list. If it is Just b, then b is included in the result list.

   Examples

   Using mapMaybe f x is a shortcut for catMaybes $ map f x in most cases:

   >>> import GHC.Internal.Text.Read ( readMaybe )
   
   >>> let readMaybeInt = readMaybe :: String -> Maybe Int
   
   >>> mapMaybe readMaybeInt ["1", "Foo", "3"]
   [1,3]
   
   >>> catMaybes $ map readMaybeInt ["1", "Foo", "3"]
   [1,3]
   

   If we map the Just constructor, the entire list should be returned:

   >>> mapMaybe Just [1,2,3]
   [1,2,3]
   

2. mapM_ :: (Foldable t, Monad m) => (a -> m b) -> t a -> m ()

   incipit-base	Incipit.Foldable

   Map each element of a structure to a monadic action, evaluate these actions from left to right, and ignore the results. For a version that doesn't ignore the results see mapM. mapM_ is just like traverse_, but specialised to monadic actions.

3. mapMaybeInput :: (Monoid s, Monoid s') => (s -> Maybe s') -> (s' -> Maybe s) -> Parser t s r -> Parser t s' r

   incremental-parser	Text.ParserCombinators.Incremental

   Converts a parser accepting one input type to another, just like 'mapMaybeInput except the two argument functions can demand more input by returning Nothing. If 'mapMaybeInput is defined for the two input inputs, then

   mapInput f g == mapMaybeInput (Just . f) (Just . g)
   

4. mapMaybeInput :: (Monoid s, Monoid s') => (s -> Maybe s') -> (s' -> Maybe s) -> Parser t s r -> Parser t s' r

   incremental-parser	Text.ParserCombinators.Incremental.LeftBiasedLocal

   Converts a parser accepting one input type to another, just like 'mapMaybeInput except the two argument functions can demand more input by returning Nothing. If 'mapMaybeInput is defined for the two input inputs, then

   mapInput f g == mapMaybeInput (Just . f) (Just . g)
   

5. mapMaybeInput :: (Monoid s, Monoid s') => (s -> Maybe s') -> (s' -> Maybe s) -> Parser t s r -> Parser t s' r

   incremental-parser	Text.ParserCombinators.Incremental.Symmetric

   Converts a parser accepting one input type to another, just like 'mapMaybeInput except the two argument functions can demand more input by returning Nothing. If 'mapMaybeInput is defined for the two input inputs, then

   mapInput f g == mapMaybeInput (Just . f) (Just . g)
   

6. mapMSEnv :: Monad m => (a -> m b) -> SEnv a -> m (SEnv b)

   liquid-fixpoint	Language.Fixpoint.Types.Environments

   No documentation available.

7. mapMExpr :: Monad m => (Expr -> m Expr) -> Expr -> m Expr

   liquid-fixpoint	Language.Fixpoint.Types.Visitor

   No documentation available.

8. mapMLocLHNames :: forall m a . (Data a, Monad m) => (Located LHName -> m (Located LHName)) -> a -> m a

   liquidhaskell-boot	Language.Haskell.Liquid.Types.Names

   No documentation available.

9. mapMeasureTy :: (ty0 -> ty1) -> MeasureV v ty0 ctor -> MeasureV v ty1 ctor

   liquidhaskell-boot	Language.Haskell.Liquid.Types.Types

   No documentation available.

10. mapMeasureV :: (v -> v') -> MeasureV v ty ctor -> MeasureV v' ty ctor

    liquidhaskell-boot	Language.Haskell.Liquid.Types.Types

    No documentation available.

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