[GHC] #14490: TTG Snags

[GHC]

#14490: TTG Snags
-------------------------------------+-------------------------------------
        Reporter:  alanz             |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #14482            |  Differential Rev(s):
       Wiki Page:                    |
  ImplementingTreesThatGrow          |
-------------------------------------+-------------------------------------

Comment (by simonpj):

 What about Plan F: no `Data` instances at all?  Easy to implement, very
 fast to compile.

 GHC doesn't use them.   (Or at least only in ways we could do some other
 way.)  They are there only to support hypothetical clients.

 Or maybe not.  It'd be good to knonw who is using them.

 Otherwise, disgusgintly, yes perhaps Plan B is best.

 PS: sorry about the red herring of Plans C and D.  Utterly bogus.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14490#comment:18>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler