[GHC] #7044: reject reading rationals with exponent notation

[GHC]

#7044: reject reading rationals with exponent notation
-------------------------------------+-------------------------------------
              Reporter:  maeder      |            Owner:
                  Type:  bug         |           Status:  new
              Priority:  normal      |        Milestone:  7.10.1
             Component:  Compiler    |          Version:  7.4.2
            Resolution:              |         Keywords:
      Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple                   |       Difficulty:  Unknown
       Type of failure:              |       Blocked By:
  None/Unknown                       |  Related Tickets:  #5692,#7266
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Changes (by thomie):

 * related:  #5692 => #5692,#7266


Comment:

 Note that with #7266, since 7.8.1, the example for integers is accepted:
 {{{
 $ ghci -XNumDecimals
 ...
 Prelude> 1e10 :: Int
 10000000000
 }}}

 Along the same lines, should `(1E10 :: Rational)` only be accepted when
 `-XNumDecimals` is set?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7044#comment:6>
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