Re: suppress warning "Defined but not used: type variable ‘x’" in GHC-8.0

On Jan 9, 2016, at 6:44 PM, Henning Thielemann wrote:

instance (Natural n) => Num.Integer (Un n) where type Repr (Un _n) = Unary

GHC-7.6.3 and GHC-7.4.2 complain: Type indexes must match class instance head Found `Un _n' but expected `Un n' In the type synonym instance declaration for `Num.Repr' In the instance declaration for `Num.Integer (Un n)'

GHC-7.8.4, GHC-7.10.3 and GHC-8.0 are happy with the difference.

I'm surprised this is accepted at all. Looks like hogwash to me. I think you should post a bug report. Richard