[GHC] #10776: DataKinds promotion of String -> Symbol and Natural -> Nat

[GHC]

#10776: DataKinds promotion of String -> Symbol and Natural -> Nat
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        Reporter:  htebalaka         |                   Owner:
            Type:  feature request   |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler (Type    |                 Version:  7.10.2
  checker)                           |
      Resolution:                    |                Keywords:  DataKinds
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 goldfire):

 Combining `Natural` and `Nat` seems straightforward. But `Symbol` and
 `String` are different: the former is not a list of characters. `Symbol`
 is much more like a promoted `Text` than a promoted `String`. And we might
 want the kind `String` to mean a type-level list of type-level characters
 someday.

 Even better than making progress on these small issues is to step back and
 come up with a plan for type-level literals of all stripes (floating-point
 numbers, characters, a promoted `Num` class of some sort?). I'm worried
 that small forays into this space will dig us into a local minimum from
 which we can't escape.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10776#comment:2>
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