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Within LTS Haskell 24.58 (ghc-9.10.3)

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1. whenJustM :: Monad m => m (Maybe a) -> (a -> m ()) -> m ()

   relude	Relude.Monad.Maybe

   Monadic version of whenJust.

   >>> whenJustM (pure Nothing) $ \b -> print (not b)
   
   >>> whenJustM (pure $ Just True) $ \b -> print (not b)
   False
   

2. isJust :: Maybe a -> Bool

   relude	Relude.Monad.Reexport

   The isJust function returns True iff its argument is of the form Just _.

   Examples

   Basic usage:

   >>> isJust (Just 3)
   True
   

   >>> isJust (Just ())
   True
   

   >>> isJust Nothing
   False
   

   Only the outer constructor is taken into consideration:

   >>> isJust (Just Nothing)
   True
   

3. fromJust :: HasCallStack => Maybe a -> a

   relude	Relude.Unsafe

   The fromJust function extracts the element out of a Just and throws an error if its argument is Nothing.

   Examples

   Basic usage:

   >>> fromJust (Just 1)
   1
   

   >>> 2 * (fromJust (Just 10))
   20
   

   >>> 2 * (fromJust Nothing)
   *** Exception: Maybe.fromJust: Nothing
   ...
   

   WARNING: This function is partial. You can use case-matching instead.

4. data IsJust (b :: Maybe a) (c :: Bool)

   first-class-families	Fcf

   No documentation available.

5. data IsJust (b :: Maybe a) (c :: Bool)

   first-class-families	Fcf.Data.Common

   No documentation available.

6. adjust :: (a -> a) -> Key a -> Context -> Context

   hs-opentelemetry-api	OpenTelemetry.Context

   No documentation available.

7. adjustContext :: MonadIO m => (Context -> Context) -> m ()

   hs-opentelemetry-api	OpenTelemetry.Context.ThreadLocal

   Alter the context on the current thread using the provided function. If there is not a context associated with the current thread, the function will be applied to an empty context and the result will be stored

8. adjustContextOnThread :: MonadIO m => ThreadId -> (Context -> Context) -> m ()

   hs-opentelemetry-api	OpenTelemetry.Context.ThreadLocal

   Alter the context If there is not a context associated with the provided thread, the function will be applied to an empty context and the result will be stored

9. adjust :: (Eq k, Hashable k) => (v -> v) -> k -> InsOrdHashMap k v -> InsOrdHashMap k v

   insert-ordered-containers	Data.HashMap.Strict.InsOrd

   No documentation available.

10. untilJust :: forall m (f :: Type -> Type) r . (Monad m, Applicative f) => m (Maybe r) -> Stream f m r

    streaming	Streaming

    Repeat a

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