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1. mapM :: (Traversable t, Monad m) => (a -> m b) -> t a -> m (t b)

   ghc-lib-parser	GHC.Prelude.Basic

   Map each element of a structure to a monadic action, evaluate these actions from left to right, and collect the results. For a version that ignores the results see mapM_.

   Examples

   mapM is literally a traverse with a type signature restricted to Monad. Its implementation may be more efficient due to additional power of Monad.

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

   ghc-lib-parser	GHC.Prelude.Basic

   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. mappend :: Monoid a => a -> a -> a

   ghc-lib-parser	GHC.Prelude.Basic

   An associative operation NOTE: This method is redundant and has the default implementation mappend = (<>) since base-4.11.0.0. Should it be implemented manually, since mappend is a synonym for (<>), it is expected that the two functions are defined the same way. In a future GHC release mappend will be removed from Monoid.

4. mapDecoratedSDoc :: (SDoc -> SDoc) -> DecoratedSDoc -> DecoratedSDoc

   ghc-lib-parser	GHC.Types.Error

   Apply a transformation function to all elements of a DecoratedSDoc.

5. mapLitValue :: Platform -> (Integer -> Integer) -> Literal -> Literal

   ghc-lib-parser	GHC.Types.Literal

   Apply a function to the Integer contained in the Literal, for when that makes sense, e.g. for Char and numbers. For fixed-size integral literals, the result will be wrapped in accordance with the semantics of the target type. See Note [WordInt underflowoverflow]

6. mapDNameEnv :: (a -> b) -> DNameEnv a -> DNameEnv b

   ghc-lib-parser	GHC.Types.Name.Env

   No documentation available.

7. mapMaybeNameEnv :: (a -> Maybe b) -> NameEnv a -> NameEnv b

   ghc-lib-parser	GHC.Types.Name.Env

   No documentation available.

8. mapNameEnv :: (elt1 -> elt2) -> NameEnv elt1 -> NameEnv elt2

   ghc-lib-parser	GHC.Types.Name.Env

   No documentation available.

9. mapMaybeOccEnv :: (a -> Maybe b) -> OccEnv a -> OccEnv b

   ghc-lib-parser	GHC.Types.Name.Occurrence

   mapMaybe for b OccEnv.

10. mapOccEnv :: (a -> b) -> OccEnv a -> OccEnv b

    ghc-lib-parser	GHC.Types.Name.Occurrence

    Map over an OccEnv (Functor instance).

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