[GHC] #3647: unify handling and error messages for -X vs. {-#LANGUAGE ...#-} pragmas/extensions

[GHC]

#3647: unify handling and error messages for -X vs. {-#LANGUAGE ...#-}
pragmas/extensions
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 Reporter:  eflister                                          |          Owner:                  
     Type:  feature request                                   |         Status:  new             
 Priority:  normal                                            |      Milestone:                  
Component:  Compiler (Parser)                                 |        Version:  6.10.4          
 Severity:  trivial                                           |     Resolution:                  
 Keywords:  language pragma extensions error message warning  |       Testcase:                  
       Os:  Unknown/Multiple                                  |   Architecture:  Unknown/Multiple
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Comment (by eflister):

 not to be annoying, but i don't understand why it's not ok for ghc to
 accept (with a warning) a SUPERSET of the official syntax.  that doesn't
 change the standard and it doesn't imply that any other compiler has to do
 anything different.  a warning would be the best user interaction -- "i
 know what you meant to say, and i'm doing it, you should just know that
 what you said isn't portable, and here's how to fix it.  would you like me
 to fix it for you?"

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3647#comment:2>
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