[GHC] #13013: Add readMaybe to Prelude (possibly readEither too), make Haddocks for read more cautionary

[GHC]

#13013: Add readMaybe to Prelude (possibly readEither too), make Haddocks for read
more cautionary
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        Reporter:  sjakobi           |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Core Libraries    |              Version:
      Resolution:                    |             Keywords:
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 ekmett):

 > To be clear, the issue is that the newly exposed `readMaybe` and
 `readEither` names could clash with pre-existing definitions that use the
 same names, right?

 Yep.

 Four weeks with the holidays probably makes sense. The phrasing in that
 section was largely put together to encourage folks patching the larger
 diaspora of packages that fall under the core libraries committee preview
 to actually use the issue trackers in question -- mostly because
 `libraries@` won't care about, say, minutiae about how some combinators in
 the `unix` package behave on OpenBSD.

 I probably should add some language encouraging `base`- and especially
 `Prelude`-affecting proposals to expect to always have to go through
 `libraries@` as the impact spreads to everyone.

 Anything submitted here is likely to get maybe 5-10 pairs of eyeballs on
 it. Submitting to `libraries@` enables a lot more feedback.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13013#comment:6>
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