Package maintainers and Hackage trustees are allowed to edit certain bits
of package metadata after a release, without uploading a new tarball.
Note that the tarball itself is never changed, just the metadata that is
stored separately. For more information about metadata revisions, please
refer to the
Hackage Metadata Revisions FAQ.
No. 
Time 
User 
SHA256 
r1 
20180917T18:35:30Z 
chessai 
70625ce5265aa9de4d1aafa37683f6210b0eb1bbaaa91a6e4ac03f017d0f3eab


Changed description
from A 'Discrete' type is a set X with at least one element, along with two
functions, @'succ' :: X > 'Maybe' X@ and @'pred' :: X > 'Maybe' X@,
such that all inhabitants of the set X can be constructed given at least
a single element of the set and these two functions. The following must hold:
@'pred' '>=>' 'succ' '>=>' 'pred' = 'pred'@
@'succ' '>=>' 'pred' '>=>' 'succ' = 'succ'@
This means that 'Int' is a discrete type, because given any x :: 'Int', one
can construct any other 'Int' with the following functions:
@'succ' x = if x '==' 'maxBound' then 'Nothing' else 'Just' (x '+' 1)@
@'pred' x = if x '==' 'minBound' then 'Nothing' else 'Just' (x '' 1)@
This also means that something like 'Double' is /not/ a discrete type, because
there are no such functions 'succ' and 'pred' that given any value of type 'Double'
can allow the construction of all values of type 'Double'.
'Discrete' acts as a replacement for 'GHC.Enum.Enum'. The motivation for
'Discrete' is twofold: firstly, totality of all typeclass instances, and
secondly, that 'GHC.Enum.Enum' is a typeclass that does too many things,
and does them poorly. If 'succ' or 'pred' are called on 'maxBound'
or 'minBound', respectively, the result will be 'Nothing'.
to A 'Discrete' type is a set X with at least one element, along with two
functions, @'succ' :: X > 'Maybe' X@ and @'pred' :: X > 'Maybe' X@,
such that all inhabitants of the set X can be constructed given at least
a single element of the set and these two functions. The following must hold:
@'pred' '>=>' 'succ' '>=>' 'pred' = 'pred'@
@'succ' '>=>' 'pred' '>=>' 'succ' = 'succ'@
This means that 'Int' is a discrete type, because given any x :: 'Int', one
can construct any other 'Int' with the following functions:
@'succ' x = if x '==' 'maxBound' then 'Nothing' else 'Just' (x '+' 1)@
@'pred' x = if x '==' 'minBound' then 'Nothing' else 'Just' (x '' 1)@
This also means that something like 'Double' is /not/ a discrete type, because
there are no such functions 'succ' and 'pred' that given any value of type 'Double'
can allow the construction of all values of type 'Double'.
'Discrete' acts as a replacement for 'GHC.Enum.Enum'. The motivation for
'Discrete' is twofold: firstly, totality of all typeclass instances, and
secondly, that 'GHC.Enum.Enum' is a typeclass that does too many things,
and does them poorly. If 'succ' or 'pred' are called on 'maxBound'
or 'minBound', respectively, the result will be 'Nothing'.

r0 
20180917T17:24:12Z 
chessai 
c0682898a7755efeeaf5bcbde0585c8c921698106f9078cada204d6606de8178


