[GHC] #4373: Lexer does not handle unicode numeric subscripts

[GHC]

#4373: Lexer does not handle unicode numeric subscripts
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    Reporter:  liamoc                |        Owner:                           
        Type:  bug                   |       Status:  new                      
    Priority:  normal                |    Milestone:                           
   Component:  Compiler (Parser)     |      Version:                           
    Keywords:  lexer, unicode, tiny  |     Testcase:                           
   Blockedby:                        |   Difficulty:                           
          Os:  Unknown/Multiple      |     Blocking:                           
Architecture:  Unknown/Multiple      |      Failure:  GHC rejects valid program
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Comment(by simonmar):

 The change you suggest sounds reasonable.  You want to make these legal
 characters in an identifier, but not legal in a numeric constant, which is
 exactly what happens if you categorise them as "digit".  Numeric constants
 are already restricted to only contain decimal digits.  Could you make a
 patch and attach it to this ticket?

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4373#comment:1>
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