[GHC] #16177: Rename Q (TExp a) to Code a

[GHC]

#16177: Rename Q (TExp a) to Code a
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        Reporter:  mpickering        |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Template Haskell  |              Version:  8.6.3
      Resolution:                    |             Keywords:
                                     |  TypedTemplateHaskell
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by mpickering):

 Unsafe meaning that running a splice can fail in any manner.

 Under that definition there are a few unsafe operations `qAddTopDecls`,
 `qRunIO`, `qReport` come immediately to mind.

 The other `qReify*` operations should be discouraged as well as they go
 against how people should be writing their typed template haskell programs
 (in my opinion). Dispatching based of these I guess is possible in a safe
 manner but I'm not sure how you could do much usefully as you have to
 construct a `Name` in order to use them.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16177#comment:2>
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