diff options
Diffstat (limited to 'src/Data/Array/Nested')
| -rw-r--r-- | src/Data/Array/Nested/Internal/Shape.hs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/Data/Array/Nested/Internal/Shape.hs b/src/Data/Array/Nested/Internal/Shape.hs index 1770e38..97b9456 100644 --- a/src/Data/Array/Nested/Internal/Shape.hs +++ b/src/Data/Array/Nested/Internal/Shape.hs @@ -115,17 +115,21 @@ listrFromList (x : xs) k = listrFromList xs $ \l -> k (x ::: l) listrHead :: ListR (n + 1) i -> i listrHead (i ::: _) = i +listrHead ZR = error "unreachable" listrTail :: ListR (n + 1) i -> ListR n i listrTail (_ ::: sh) = sh +listrTail ZR = error "unreachable" listrInit :: ListR (n + 1) i -> ListR n i listrInit (n ::: sh@(_ ::: _)) = n ::: listrInit sh listrInit (_ ::: ZR) = ZR +listrInit ZR = error "unreachable" listrLast :: ListR (n + 1) i -> i listrLast (_ ::: sh@(_ ::: _)) = listrLast sh listrLast (n ::: ZR) = n +listrLast ZR = error "unreachable" listrIndex :: forall k n i. (k + 1 <= n) => SNat k -> ListR n i -> i listrIndex SZ (x ::: _) = x |