[GHC] #11992: RFC, add Suc to base

[GHC]

#11992: RFC, add Suc to base
-------------------------------------+-------------------------------------
           Reporter:  Iceland_jack   |             Owner:
               Type:  feature        |            Status:  new
  request                            |
           Priority:  normal         |         Milestone:
          Component:                 |           Version:  8.1
  libraries/base                     |
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 {{{#!hs
 hasSuc :: Int -> Maybe Int
 hasSuc n = [ n - 1 | n > 0 ]

 pattern Suc :: Int -> Int
 pattern Suc n <- (hasSuc -> Just n)
   where Suc n = n + 1
 }}}

 with a more general type

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11992>
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