Levent Erkok <erk...@gmail.com> writes: > I'm trying to port some plugin code from GHC 8.0.2 to GHC 8.2.1; alas I'm > getting an error suggesting that TyCon is no longer an instance of Ord: > > Data/SBV/Plugin/Analyze.hs:580:33: error: > • No instance for (Ord TyCon) arising from a use of ‘M.lookup’ > There are instances for similar types: > instance Ord GHC.Types.TyCon -- Defined in ‘GHC.Classes’ > • In the expression: k `M.lookup` tcMap > In the expression: > case k `M.lookup` tcMap of > Just knd -> return knd > Nothing -> unknown > In a case alternative: > Just k > -> case k `M.lookup` tcMap of > Just knd -> return knd > Nothing -> unknown > | > 580 | Just k -> case k `M.lookup` tcMap of > | ^^^^^^^^^^^^^^^^^^ > Hmm. I am unable to reproduce this,
$ ghci
λ> import Type.Reflection
λ> let tc = typeRepTyCon (typeRep @Int)
λ> tc == tc
True
Does that work for you?
Cheers,
- Ben
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