[GHC] #9946: Expose the source location of template-haskell Names

[GHC]

#9946: Expose the source location of template-haskell Names
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              Reporter:  gridaphobe  |             Owner:
                  Type:  feature     |            Status:  new
  request                            |         Milestone:
              Priority:  low         |           Version:  7.11
             Component:  Compiler    |  Operating System:  Unknown/Multiple
              Keywords:              |   Type of failure:  None/Unknown
          Architecture:              |        Blocked By:
  Unknown/Multiple                   |   Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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 I've often wanted to know where a particular `Name` is defined
 (specifically the filepath), but as far as I can tell, template-haskell
 doesn't currently support this. It'd be really nice to have a function

 {{{#!hs
 nameLoc :: Name -> Loc
 }}}

 to expose the definition site of the `Name`.

 I think this should be fairly straightforward to add since GHC carries the
 definition site around with its `Name`s, but I've never looked at the TH
 internals.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9946>
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