[GHC] #11727: Allow one type signature for multiple pattern synonyms

[GHC]

#11727: Allow one type signature for multiple pattern synonyms
-------------------------------------+-------------------------------------
           Reporter:  mpickering     |             Owner:
               Type:  feature        |            Status:  new
  request                            |
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  7.10.3
           Keywords:                 |  Operating System:  Unknown/Multiple
  PatternSynonyms                    |
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 There's no reason why we shouldn't allow the same type signature for
 multiple pattern synonyms just like ordinary functions.

 For example,

 {{{
 pattern A,B,C,D :: Int
 pattern A = 5
 pattern B = 6
 pattern C = 7
 pattern D = 8
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11727>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler