[GHC] #11096: Builtin encoder/decoder should be used for Latin-1

[GHC]

#11096: Builtin encoder/decoder should be used for Latin-1
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        Reporter:  bgamari           |                Owner:  hvr
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  7.10.2
      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 hvr):

 Here's a strawman-patch I'm using locally for the AIX port I'm working on:

 {{{#!diff
 --- a/libraries/base/GHC/IO/Encoding.hs
 +++ b/libraries/base/GHC/IO/Encoding.hs
 @@ -237,6 +237,8 @@ mkTextEncoding e = case mb_coding_failure_mode of
  mkTextEncoding' :: CodingFailureMode -> String -> IO TextEncoding
  mkTextEncoding' cfm enc =
    case [toUpper c | c <- enc, c /= '-'] of
 +  -- ISO8859-1 we can handle ourself
 +    "ISO88591" -> return $ Latin1.mkLatin1 cfm
    -- UTF-8 and friends we can handle ourselves
      "UTF8"    -> return $ UTF8.mkUTF8 cfm
      "UTF16"   -> return $ UTF16.mkUTF16 cfm
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11096#comment:2>
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