[GHC] #13652: Add integer division to GHC.TypeLits

GHC ghc-devs at haskell.org
Wed Oct 4 14:46:13 UTC 2017


#13652: Add integer division to GHC.TypeLits
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        Reporter:  vagarenko         |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Core Libraries    |              Version:  8.0.1
      Resolution:                    |             Keywords:
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 vagarenko):

 Replying to [comment:2 RyanGlScott]:

 > one could define DivMod in terms of Div and Mod

 like this:
 {{{#!hs
 type DivMod a b = (Div a b, Mod a b)
 }}}
 ?

 Why would it be less performant than baked in `DivMod`? Because `a` and
 `b` would be reduced twice?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13652#comment:3>
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