例えば、qというアクションが生成するコードを確認したいなら、ghci上で以下のようにする。
>>> :set -XTemplateHaskell
>>> :m + Language.Haskell.TH
>>> putStrLn $(stringE . pprint =<< q)
ただし、
q :: Ppr v => Q v
参考: http://stackoverflow.com/questions/16690925/template-haskell-reify-in-ghci
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