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{-# LANGUAGE MagicHash #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE PolyKinds #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE UnboxedTuples #-}
module RepPolyTuple2 where
import GHC.Exts
type RR :: RuntimeRep
type family RR where { RR = FloatRep }
type F :: TYPE RR
type family F where { F = Float# }
{-# NOINLINE expensive #-}
expensive :: Float -> Float
expensive x = cos x ** 123.45
tup x = (# , #) @LiftedRep @RR (expensive x)
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