[GHC] #13573: Add Foldable1 to base

[GHC]

#13573: Add Foldable1 to base
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        Reporter:  Iceland_jack      |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              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:  #10365            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by andrewthad):

 The name of the typeclass is a little unfortunate since the similarly
 named `Eq1`, `Show1`, etc. use the same suffix but with a very different
 meaning. Also, it's a little unfortunate that `Foldable1` doesn't have
 `foldl1`, `foldr1`, etc. Although there are already functions of the same
 name in `Foldable`, and there's no burning need to remove them any time
 soon, it would be nice to have a long-term plan to deprecate and remove
 them since they are a wart in the typeclass design.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13573#comment:13>
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