[GHC] #7807: Parse error with "where" and file-ending comment

2 Apr 2013

      #7807: Parse error with "where" and file-ending comment
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Reporter:  goldfire          |          Owner:                   
    Type:  bug               |         Status:  new              
Priority:  normal            |      Component:  Compiler (Parser)
 Version:  7.7               |       Keywords:                   
      Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple 
 Failure:  None/Unknown      |      Blockedby:                   
Blocking:                    |        Related:                   
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 Consider the following file:

 {{{
 {-# LANGUAGE TypeFamilies #-}

 type family F a
 type instance where
   F Int = Bool

 {-

 -}
 }}}

 If there is a file-ending newline, after the comment, the file parses. If
 there is not a file-ending newline, I get a parse error.

 I wrote the code dealing with {{{type instance where}}} notation, but this
 seems more related to parsing issues (which I know little about) than
 {{{type instance where}}}. Please correct me if I'm wrong.

-- 
Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7807
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