[GHC] #16232: Add setField to HasField

[GHC]

#16232: Add setField to HasField
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        Reporter:  adamgundry        |                Owner:  adamgundry
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:  8.10.1
       Component:  Compiler (Type    |              Version:  8.7
  checker)                           |
      Resolution:                    |             Keywords:  ORF
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 > Sorry, to be clear, do you mean the approach of generating renamed
 syntax at definition sites?

 Yes -- essentially replacing the stuff where we generate record selectors
 by stuff that generates this compound selector/updater function; plus
 perhaps generating the legacy selector function from that.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16232#comment:5>
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