[GHC] #5719: Empty tuple doesn't have kind Constraint

[GHC]

#5719: Empty tuple doesn't have kind Constraint
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    Reporter:  simonpj           |       Owner:                  
        Type:  bug               |      Status:  new             
    Priority:  normal            |   Milestone:                  
   Component:  Compiler          |     Version:  7.3             
    Keywords:                    |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown    
  Difficulty:  Unknown           |    Testcase:                  
   Blockedby:                    |    Blocking:                  
     Related:                    |  
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Comment(by simonpj@…):

 commit 416c5903f3b8cf4cdd4a03c8949489df18cd790a
 {{{
 Author: Simon Peyton Jones <simonpj at microsoft.com>
 Date:   Fri Dec 23 16:05:48 2011 +0000

     Use HsTupleTy [] for unit tuples, uniformly

     This is just a tidy-up triggered by #5719.  We were parsing () as a
     type constructor, rather than as a HsTupleTy, but it's better dealt
     with uniformly as the former, I think.  Somewhat a matter of taste.

  compiler/hsSyn/HsTypes.lhs      |   13 +++++++++++++
  compiler/parser/Parser.y.pp     |   30 ++++++++++++++++--------------
  compiler/parser/RdrHsSyn.lhs    |   22 +++++++++++-----------
  compiler/typecheck/TcHsType.lhs |   12 ++++--------
  4 files changed, 44 insertions(+), 33 deletions(-)
 }}}

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5719#comment:4>
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