[GHC] #8778: Typeable TypeNats

GHC ghc-devs at haskell.org
Tue Jun 17 21:10:33 UTC 2014


#8778: Typeable TypeNats
--------------------------------------------+------------------------------
        Reporter:  dmcclean                 |            Owner:
            Type:  feature request          |           Status:  new
        Priority:  normal                   |        Milestone:  ⊥
       Component:  Compiler (Type checker)  |          Version:  7.8.1-rc1
      Resolution:                           |         Keywords:
Operating System:  Unknown/Multiple         |     Architecture:
 Type of failure:  None/Unknown             |  Unknown/Multiple
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:  4385
--------------------------------------------+------------------------------

Comment (by diatchki):

 I looked some more at the code, and realized that this more complex
 encoding is not worth the effort:  we are always hashing the entire type-
 representation, so it does not matter how the types are encoded.  Also, it
 looks like we are using a reasonable hashing function (MD5), and
 collisions for it are very unlikely so we should be OK.

 So, I guess we can close this ticket, unless there are any more issues?

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8778#comment:18>
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