[GHC] #13875: ApplicativeDo desugaring is lazier than standard desugaring

[GHC]

#13875: ApplicativeDo desugaring is lazier than standard desugaring
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        Reporter:  dfeuer            |                Owner:  simonmar
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.3
      Resolution:                    |             Keywords:  ApplicativeDo
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Other             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D3681
       Wiki Page:                    |
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Comment (by Iceland_jack):

 I have long had an idea for an `ado`, restricting the `do`-notation to be
 `Applicative` or weaker. It would make the user intent's clearer, "this
 should not have a `Monad` constraint" and paves the way for a wealth of
 Shakespearean puns

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13875#comment:9>
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