[GHC] #10358: ApiAnnotations : PatBind gives wrong SrcSpan for the pattern.

27 Apr 2015

      #10358: ApiAnnotations : PatBind gives wrong SrcSpan for the pattern.
-------------------------------------+-------------------------------------
              Reporter:  alanz       |             Owner:  alanz
                  Type:  bug         |            Status:  new
              Priority:  normal      |         Milestone:  7.10.2
             Component:  Compiler    |           Version:  7.10.1
  (Parser)                           |  Operating System:  Unknown/Multiple
              Keywords:              |   Type of failure:  None/Unknown
  ApiAnnotations                     |        Blocked By:
          Architecture:              |   Related Tickets:
  Unknown/Multiple                   |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
-------------------------------------+-------------------------------------
 The production for `decl_no_th` starts

 {{{
 decl_no_th :: { Located (OrdList (LHsDecl RdrName)) }
         : sigdecl               { $1 }

         | '!' aexp rhs          {% do { let { e = sLL $1 $> (SectionR (sL1
 $1 (HsVar bang_RDR)) $2) };
                                         pat <- checkPattern empty e;
 ...
 }}}

 The `e` value should be just the pattern, excluding the `rhs`, but the
 span created includes the `rhs`.

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Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10358
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