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{-# LANGUAGE DataKinds #-}
{-# LANGUAGE FlexibleInstances #-}
module TcCustomSolverSuper where
import GHC.TypeLits
import Data.Typeable
{-
When solving super-class instances, GHC solves the evidence without
using the solver (see `tcSuperClasses` in `TcInstDecls`).
However, some classes need to be excepted from this behavior,
as they have custom solving rules, and this test checks that
we got this right.
-}
class (Typeable x, KnownNat x) => C x
class (Typeable x, KnownSymbol x) => D x
instance C 2
instance D "2"
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