diff options
Diffstat (limited to 'src/Data/Array/Nested/Internal/Shape.hs')
| -rw-r--r-- | src/Data/Array/Nested/Internal/Shape.hs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/Data/Array/Nested/Internal/Shape.hs b/src/Data/Array/Nested/Internal/Shape.hs index 1e0d7cc..4cc58dd 100644 --- a/src/Data/Array/Nested/Internal/Shape.hs +++ b/src/Data/Array/Nested/Internal/Shape.hs @@ -76,6 +76,10 @@ listrFromList :: [i] -> (forall n. ListR n i -> r) -> r listrFromList [] k = k ZR listrFromList (x : xs) k = listrFromList xs $ \l -> k (x ::: l) +listrTail :: ListR (n + 1) i -> ListR n i +listrTail (_ ::: sh) = sh +listrTail ZR = error "unreachable" + 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 @@ -149,6 +153,9 @@ ixCvtRX (n :.: (idx :: IxR m Int)) = castWith (subst2 @IxX @Int (lemReplicateSucc @(Nothing @Nat) @m)) (n :.% ixCvtRX idx) +ixrTail :: IxR (n + 1) i -> IxR n i +ixrTail (IxR list) = IxR (listrTail list) + ixrToSNat :: IxR n i -> SNat n ixrToSNat (IxR sh) = listrToSNat sh @@ -209,6 +216,9 @@ shrSize :: IShR n -> Int shrSize ZSR = 1 shrSize (n :$: sh) = n * shrSize sh +shrTail :: ShR (n + 1) i -> ShR n i +shrTail (ShR list) = ShR (listrTail list) + shrToSNat :: ShR n i -> SNat n shrToSNat (ShR sh) = listrToSNat sh @@ -278,6 +288,9 @@ listsToList :: ListS sh (Const i) -> [i] listsToList ZS = [] listsToList (Const i ::$ is) = i : listsToList is +listsTail :: ListS (n : sh) i -> ListS sh i +listsTail (_ ::$ sh) = sh + listsAppend :: ListS sh f -> ListS sh' f -> ListS (sh ++ sh') f listsAppend ZS idx' = idx' listsAppend (i ::$ idx) idx' = i ::$ listsAppend idx idx' @@ -370,6 +383,9 @@ ixCvtSX :: IIxS sh -> IIxX (MapJust sh) ixCvtSX ZIS = ZIX ixCvtSX (n :.$ sh) = n :.% ixCvtSX sh +ixsTail :: IxS (n : sh) i -> IxS sh i +ixsTail (IxS list) = IxS (listsTail list) + -- | The shape of a shape-typed array given as a list of 'SNat' values. -- @@ -421,6 +437,9 @@ shCvtSX :: ShS sh -> IShX (MapJust sh) shCvtSX ZSS = ZSX shCvtSX (n :$$ sh) = SKnown n :$% shCvtSX sh +shsTail :: ShS (n : sh) -> ShS sh +shsTail (ShS list) = ShS (listsTail list) + shsSize :: ShS sh -> Int shsSize ZSS = 1 shsSize (n :$$ sh) = fromSNat' n * shsSize sh |