[GHC] #10068: Make the runtime reflection API for names, modules, locations more systematic

[GHC]

#10068: Make the runtime reflection API for names, modules, locations more
systematic
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        Reporter:  simonpj           |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  high              |               Milestone:  7.12.1
       Component:  Compiler          |                 Version:  7.8.4
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by bgamari):

 I will try to follow this example in my DWARF stack tracing work.

 To recap, it seems like we have the following types,
 {{{#!hs
 -- | A Haskell module belonging to a package
 data Module
 moduleName :: Module -> String
 modulePackage :: Module -> Package

 -- | A Haskell package
 data Package
 packageName :: Package -> String
 packageKey :: Package -> PackageKey

 -- | A named definition in a Haskell module
 data Entity
 entityModule :: Entity -> Module
 entityName :: Entity -> String
 }}}

 Any preferences on where these should live? `GHC.Reflection` seems
 appropriate but perhaps a bit ambiguous given how overloaded "reflection"
 now is.

 In the case of DWARF stacktraces this will require that we are able to
 produce a `Module` for any given loaded Haskell module. It seems the
 easiest way to do this would be to simply inject a binding with a
 predictable name into each module at compile time.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10068#comment:13>
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