not package:ghc-internal

Boolean "not"

Type-level "not". An injective type family since 4.10.0.0.

Bitwise "not", also known as the binary complement.

notElem is the negation of elem.

Examples

Basic usage:

>>> 3 `notElem` []
True

>>> 3 `notElem` [1,2]
True

>>> 3 `notElem` [1,2,3,4,5]
False

For infinite structures, notElem terminates if the value exists at a finite distance from the left side of the structure:

>>> 3 `notElem` [1..]
False

>>> 3 `notElem` ([4..] ++ [3])
* Hangs forever *

notElem is the negation of elem.

Examples

>>> 3 `notElem` []
True

>>> 3 `notElem` [1,2]
True

>>> 3 `notElem` [1,2,3,4,5]
False

>>> 3 `notElem` [1..]
False

>>> 3 `notElem` [4..]
* Hangs forever *

Deprecated: Use bang. See https://gitlab.haskell.org/ghc/ghc/wikis/migration/8.0. Example usage: 'bang noSourceUnpackedness noSourceStrictness'

Cn: Other, Not Assigned

Return monotonic time in seconds, since some unspecified starting point

Return monotonic time in nanoseconds, since some unspecified starting point

blocked on some other resource. Without -threaded, I/O and threadDelay show up as BlockedOnOther, with -threaded they show up as BlockedOnMVar.

Execute an IO action, adding the given ExceptionContext to any thrown synchronous exceptions.

The isNothing function returns True iff its argument is Nothing.

Examples

Basic usage:

>>> isNothing (Just 3)
False

>>> isNothing (Just ())
False

>>> isNothing Nothing
True

Only the outer constructor is taken into consideration:

>>> isNothing (Just Nothing)
False

ExceptionAnnotations are types which can decorate exceptions as ExceptionContext.