Does this Template Haskell template work for you?
{-# LANGUAGE TemplateHaskell #-}
module TestTH where
import Language.Haskell.TH.Ppr import Language.Haskell.TH
$( do expr <- [| \x -> case x of True -> not; False -> id |] runIO $ putStrLn $ pprint expr return [] )
Richard
On Nov 11, 2015, at 6:14 AM, Jan Stolarek
Devs,
Module Language.Haskell.TH.Ppr defines Ppr instances for Template Haskell data types. What is the fastest way of testing these instances, ie. pretty-printing TH data types? I want to make sure that the instances I added print the data type in the way that I expect.
Janek
--- Politechnika Łódzka Lodz University of Technology
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