diff options
Diffstat (limited to 'src/Data/Array/Nested/Lemmas.hs')
| -rw-r--r-- | src/Data/Array/Nested/Lemmas.hs | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/Data/Array/Nested/Lemmas.hs b/src/Data/Array/Nested/Lemmas.hs index 8cac298..e089479 100644 --- a/src/Data/Array/Nested/Lemmas.hs +++ b/src/Data/Array/Nested/Lemmas.hs @@ -43,14 +43,18 @@ lemAppLeft _ Refl = Refl lemReplicatePlusApp :: forall n m a. SNat n -> Proxy m -> Proxy a -> Replicate (n + m) a :~: Replicate n a ++ Replicate m a +{- for now, the plugins can't derive a type for this code, see + https://github.com/clash-lang/ghc-typelits-natnormalise/pull/98#issuecomment-3332842214 lemReplicatePlusApp sn _ _ = go sn where go :: SNat n' -> Replicate (n' + m) a :~: Replicate n' a ++ Replicate m a go SZ = Refl go (SS (n :: SNat n'm1)) - | Refl <- lemReplicateSucc @a @n'm1 + | Refl <- lemReplicateSucc @a n , Refl <- go n - = sym (lemReplicateSucc @a @(n'm1 + m)) + = sym (lemReplicateSucc @a (SNat @(n'm1 + m))) +-} +lemReplicatePlusApp _ _ _ = unsafeCoerceRefl lemDropLenApp :: Rank l1 <= Rank l2 => Proxy l1 -> Proxy l2 -> Proxy rest |