[GHC] #8697: Type rationals

[GHC]

#8697: Type rationals
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        Reporter:  MikeIzbicki       |            Owner:
            Type:  feature request   |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  7.6.3
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by MikeIzbicki):

 @carter I'm not sure what you're suggesting.  The following code (combined
 with the code above) does exactly what I want:

 {{{
 data Blah (num::Frac) = Blah

 f :: Blah num -> Rational
 f = ...

 g = f (Blah::Blah (13/10))
 }}}

 It would just be nice to be able to write
 {{{
 g = f (Blah::Blah 1.3)
 }}}
 instead.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8697#comment:4>
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