From 0096708a7b8d7d299e006a29ca4760d2c6c68629 Mon Sep 17 00:00:00 2001 From: Tom Smeding Date: Tue, 21 Oct 2025 10:44:18 +0200 Subject: Revert "Remove a spurious case now correclty rules out by the plugins" This reverts commit 069ac5b0bcf52b8b5414261106e82ef0eb8a582e. The plugins are unsound: https://github.com/clash-lang/ghc-typelits-natnormalise/issues/105 --- src/Data/Array/Nested/Ranked/Shape.hs | 1 + 1 file changed, 1 insertion(+) diff --git a/src/Data/Array/Nested/Ranked/Shape.hs b/src/Data/Array/Nested/Ranked/Shape.hs index 837b1ac..488b4d8 100644 --- a/src/Data/Array/Nested/Ranked/Shape.hs +++ b/src/Data/Array/Nested/Ranked/Shape.hs @@ -134,6 +134,7 @@ listrCast = listrCastWithName "listrCast" listrIndex :: forall k n i. (k + 1 <= n) => SNat k -> ListR n i -> i listrIndex SZ (x ::: _) = x listrIndex (SS i) (_ ::: xs) | Refl <- lemLeqSuccSucc (Proxy @k) (Proxy @n) = listrIndex i xs +listrIndex _ ZR = error "k + 1 <= 0" listrZip :: ListR n i -> ListR n j -> ListR n (i, j) listrZip ZR ZR = ZR -- cgit v1.2.3-70-g09d2