[GHC] #3645: Layout and pragmas

[GHC]

#3645: Layout and pragmas
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    Reporter:  igloo              |        Owner:              
        Type:  feature request    |       Status:  new         
    Priority:  normal             |    Milestone:  7.0.1       
   Component:  Compiler (Parser)  |      Version:  6.10.4      
    Keywords:                     |     Testcase:              
   Blockedby:                     |   Difficulty:  Unknown     
          Os:  Unknown/Multiple   |     Blocking:              
Architecture:  Unknown/Multiple   |      Failure:  None/Unknown
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Comment(by boris):

 Please, review the patch.
 The problem was that line

 {{{
 <0,option_prags> \n                             { begin bol }
 }}}

 switched alex state to to ''bol''. If there is space between newline and
 "#-}", the previous state is popped in do_bol function and end of pragma
 successfully matches in ''option_prags'' state. But without any space the
 beginning of "#-}" will be matched in ''bol'' state and the rest will fail
 to match.

 Perhaps the patch is a little hacky and it is better to modify bol part.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3645#comment:5>
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