Pretty-printing TH data types

[Richard Eisenberg]

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 <jan.stolarek at p.lodz.pl> wrote:

> 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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