[GHC] #14716: indexM-style accessor for arrays?

[GHC]

#14716: indexM-style accessor for arrays?
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        Reporter:  Zemyla            |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  libraries         |              Version:  8.2.2
  (other)                            |
      Resolution:                    |             Keywords:  array
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 hvr):

 Somewhat related, in https://github.com/haskell/bytestring/pull/146
 there's a minor bit of name-finding struggle on whether to introduce a
 `indexMaybe` or a `(!?)` verb for the total version of `index`...

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14716#comment:4>
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