[GHC] #870: extra commas accepted in import export lists

[GHC]

#870: extra commas accepted in import export lists
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  Reporter:  ross      |          Owner:         
      Type:  bug       |         Status:  new    
  Priority:  normal    |      Milestone:         
 Component:  Compiler  |        Version:  6.4.2  
  Severity:  normal    |     Resolution:         
  Keywords:            |             Os:  Unknown
Difficulty:  Unknown   |   Architecture:  Unknown
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Comment (by duncan):

 Though of course, existing programs use this and will break. I'm not
 saying don't do it, just bear that in mind.

 I'll have to go change every module in Gtk2Hs. :-)

 One advantage of allowing extra ','s is that it makes it easier to see
 what's really changed in a diff and it makes using #ifdefs in export lists
 easier.

 If this is going to change perhaps start by deprecating them and making it
 a warning so people will have a chance to fix their code.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/870>
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