[GHC] #3968: DoRec not supported, but RecursiveDo deprecated

[GHC]

#3968: DoRec not supported, but RecursiveDo deprecated
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    Reporter:  m4dc4p   |       Owner:                           
        Type:  bug      |      Status:  new                      
    Priority:  normal   |   Component:  Compiler                 
     Version:  6.12.1   |    Keywords:                           
          Os:  Windows  |    Testcase:                           
Architecture:  x86      |     Failure:  GHC rejects valid program
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Comment(by malcolm.wallace@…):

 The reason RecursiveDo has been deprecated is because the syntax has
 changed.  With the new alternative, DoRec, the 'mdo' keyword has been
 removed in favour of a new keyword 'rec'.  See
 http://haskell.org/ghc/docs/latest/html/users_guide/syntax-extns.html#mdo-
 notation

 However, I note that the GHC User Guide still lists the old name for the
 language extension (at http://haskell.org/ghc/docs/latest/html/users_guide
 /flag-reference.html), and does not list the new name.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3968#comment:1>
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