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Besides the obvious benefits of being able to manipulate `TExp`'s of unboxed types, this also simplified `-XDeriveLift` all while making it more capable. * `ghc-prim` is explicitly depended upon by `template-haskell` * The following TH things are parametrized over `RuntimeRep`: - `TExp(..)` - `unTypeQ` - `unsafeTExpCoerce` - `Lift(..)` * The following instances have been added to `Lift`: - `Int#`, `Word#`, `Float#`, `Double#`, `Char#`, `Addr#` - unboxed tuples of lifted types up to arity 7 - unboxed sums of lifted types up to arity 7 Ideally we would have levity-polymorphic _instances_ of unboxed tuples and sums. * The code generated by `-XDeriveLift` uses expression quotes instead of generating large amounts of TH code and having special hard-coded cases for some unboxed types.
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