Re: classP recently deleted from TH.Lib

Alrighty, this is what I have now. If you think this is ok, I'll go on re-implementing equalP too and commit. Then we can bikeshed about the deprecation message :-) diff --git a/libraries/template-haskell/Language/Haskell/TH/Lib.hs b/libraries/template-haskell/Language/Haskell/TH/Lib.hs index 49baa96..08235ba 100644 --- a/libraries/template-haskell/Language/Haskell/TH/Lib.hs +++ b/libraries/template-haskell/Language/Haskell/TH/Lib.hs @@ -526,6 +526,13 @@ sigT t k equalityT :: TypeQ equalityT = return EqualityT +{-# DEPRECATED classP "Constraint constructors are just type constructors, frob this code as 'constraintT'." #-} +classP :: Name -> [Q Type] -> Q Pred +classP cla tys + = do + tysl <- sequence tys + return (foldl AppT (ConT cla) tysl) + promotedT :: Name -> TypeQ promotedT = return . PromotedT Cheers, Gabor On 5/14/14, Gregory Collins wrote:

On Mon, May 12, 2014 at 4:58 PM, Richard Eisenberg wrote:

...

We could, of course, just leave the functions there with new implementations, but that feels like it could accumulate legacy functions over time.

I think the ultimate goal of removing the function was not unwise of you, but the right thing to do here would be to write a reimplementation, mark it as {-# DEPRECATED #-}, and give a timetable for its future removal. This gives users time to adjust and minimizes breakage.

G -- Gregory Collins