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  1. unsafeMakeLoadArrayAdjusted :: Index ix => Comp -> Sz ix -> Maybe e -> (forall s . () => Scheduler s () -> (Ix1 -> e -> ST s ()) -> ST s ()) -> Array DL ix e

    massiv Data.Massiv.Array.Unsafe

    Same as unsafeMakeLoadArray, except will ensure that starting index is correctly adjusted. Which means the writing function gets one less argument.

  2. stepStartAdjust :: Int -> Int -> Int

    massiv Data.Massiv.Core.Index

    Helper for adjusting stride of a chunk

  3. catchJust :: Exception e => (e -> Maybe b) -> IO a -> (b -> IO a) -> IO a

    protolude Protolude

    The function catchJust is like catch, but it takes an extra argument which is an exception predicate, a function which selects which type of exceptions we're interested in. 

    catchJust (\e -> if isDoesNotExistErrorType (ioeGetErrorType e) then Just () else Nothing)
(readFile f)
(\_ -> do hPutStrLn stderr ("No such file: " ++ show f)
return "")
    Any other exceptions which are not matched by the predicate are re-raised, and may be caught by an enclosing catch, catchJust, etc.

  4. handleJust :: Exception e => (e -> Maybe b) -> (b -> IO a) -> IO a -> IO a

    protolude Protolude

    A version of catchJust with the arguments swapped around (see handle).

  5. isJust :: Maybe a -> Bool

    protolude Protolude

    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

  6. tryJust :: Exception e => (e -> Maybe b) -> IO a -> IO (Either b a)

    protolude Protolude

    A variant of try that takes an exception predicate to select which exceptions are caught (c.f. catchJust). If the exception does not match the predicate, it is re-thrown.

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

    protolude Protolude.Partial

    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.

  8. unsafeFromJust :: HasCallStack => Maybe a -> a

    protolude Protolude.Unsafe

    No documentation available.

  9. assertJust :: HasCallStack => Maybe a -> IO a

    HTF Test.Framework.HUnitWrapper

    Fail if the given value is a Nothing.

  10. assertJustVerbose :: HasCallStack => String -> Maybe a -> IO a

    HTF Test.Framework.HUnitWrapper

    Fail if the given value is a Nothing, supplying an additional error message.

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