[GHC] #10697: Change template-haskell API to allow NOUNPACK, lazy annotations

GHC ghc-devs at haskell.org
Thu Dec 10 16:51:56 UTC 2015


#10697: Change template-haskell API to allow NOUNPACK, lazy annotations
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        Reporter:  RyanGlScott       |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Template Haskell  |              Version:  7.10.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #5290, #8347      |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by adamse):

 But if

 > TH is supposed to reflect source code

 it is clear to the user of TH that the GHC could do more things to the
 code. I think this is true: a datatype will always be *at least* as strict
 and unpacked as `HsSrcBangs`/reification says.

 (relatedly I wonder if I can get GHC to tell me what
 strictness/unpackedness is ultimately choosen, as a debugging tool)

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10697#comment:9>
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