[GHC] #8304: more lenient operator sections (RelaxedSections extension)

[GHC]

#8304: more lenient operator sections (RelaxedSections extension)
-------------------------------------+-------------------------------------
       Reporter:  aavogt             |             Owner:
           Type:  feature request    |            Status:  new
       Priority:  lowest             |         Milestone:
      Component:  Compiler (Parser)  |           Version:  7.6.3
       Keywords:                     |  Operating System:  Unknown/Multiple
   Architecture:  Unknown/Multiple   |   Type of failure:  None/Unknown
     Difficulty:  Unknown            |         Test Case:
     Blocked By:                     |          Blocking:
Related Tickets:                     |
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 Some operator sections are rejected which could have some meaning.

 {{{
 (a ++ b ++ )  could mean  \x -> a ++ b ++ c
 (++ a ++) could mean \x y -> x ++ a ++ y
 }}}

 The attached quasiquoter implements this, but for various reasons it would
 be better if ghc supported this directly.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8304>
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