Rename *LengthSNat to *Rank

5 files changed, 31 insertions, 35 deletions

diff --git a/src/Data/Array/Mixed/Permutation.hs b/src/Data/Array/Mixed/Permutation.hs
index ca99b02..331d5e0 100644
--- a/src/Data/Array/Mixed/Permutation.hs
+++ b/src/Data/Array/Mixed/Permutation.hs
@@ -45,9 +45,9 @@ infixr 5 `PCons`
 deriving instance Show (Perm list)
 deriving instance Eq (Perm list)
 
-permLengthSNat :: Perm list -> SNat (Rank list)
-permLengthSNat PNil = SNat
-permLengthSNat (_ `PCons` l) | SNat <- permLengthSNat l = SNat
+permRank :: Perm list -> SNat (Rank list)
+permRank PNil = SNat
+permRank (_ `PCons` l) | SNat <- permRank l = SNat
 
 permFromList :: [Int] -> (forall list. Perm list -> r) -> r
 permFromList [] k = k PNil
@@ -67,7 +67,7 @@ permToList' = map fromIntegral . permToList
 -- then @Nothing@ is returned.
 permCheckPermutation :: forall r list. Perm list -> (IsPermutation list => r) -> Maybe r
 permCheckPermutation = \p k ->
-  let n = permLengthSNat p
+  let n = permRank p
   in case (provePerm1 (Proxy @list) n p, provePerm2 (SNat @0) n p) of
        (Just Refl, Just Refl) -> Just k
        _ -> Nothing
diff --git a/src/Data/Array/Mixed/Shape.hs b/src/Data/Array/Mixed/Shape.hs
index e46105d..95cd4ef 100644
--- a/src/Data/Array/Mixed/Shape.hs
+++ b/src/Data/Array/Mixed/Shape.hs
@@ -81,9 +81,9 @@ listxFold f (x ::% xs) = f x <> listxFold f xs
 listxLength :: ListX sh f -> Int
 listxLength = getSum . listxFold (\_ -> Sum 1)
 
-listxLengthSNat :: ListX sh f -> SNat (Rank sh)
-listxLengthSNat ZX = SNat
-listxLengthSNat (_ ::% l) | SNat <- listxLengthSNat l = SNat
+listxRank :: ListX sh f -> SNat (Rank sh)
+listxRank ZX = SNat
+listxRank (_ ::% l) | SNat <- listxRank l = SNat
 
 listxShow :: forall sh f. (forall n. f n -> ShowS) -> ListX sh f -> ShowS
 listxShow f l = showString "[" . go "" l . showString "]"
@@ -265,8 +265,8 @@ instance NFData i => NFData (ShX sh i) where
 shxLength :: ShX sh i -> Int
 shxLength (ShX l) = listxLength l
 
-shxLengthSNat :: ShX sh f -> SNat (Rank sh)
-shxLengthSNat (ShX list) = listxLengthSNat list
+shxRank :: ShX sh f -> SNat (Rank sh)
+shxRank (ShX list) = listxRank list
 
 -- | This is more than @geq@: it also checks that the integers (the unknown
 -- dimensions) are the same.
@@ -344,10 +344,6 @@ shxEnum = \sh -> go sh id []
     go ZSX f = (f ZIX :)
     go (n :$% sh) f = foldr (.) id [go sh (f . (i :.%)) | i <- [0 .. fromSMayNat' n - 1]]
 
-shxRank :: ShX sh f -> SNat (Rank sh)
-shxRank ZSX = SNat
-shxRank (_ :$% sh) | SNat <- shxRank sh = SNat
-
 
 -- * Static mixed shapes
 
diff --git a/src/Data/Array/Mixed/XArray.hs b/src/Data/Array/Mixed/XArray.hs
index 20f5c7a..08295cd 100644
--- a/src/Data/Array/Mixed/XArray.hs
+++ b/src/Data/Array/Mixed/XArray.hs
@@ -258,7 +258,7 @@ sumInner ssh ssh' arr
         go :: XArray (sh ++ '[Flatten sh']) a -> XArray sh a
         go (XArray arr')
           | Refl <- lemRankApp ssh ssh'F
-          , let sn = listxLengthSNat (let StaticShX l = ssh in l)
+          , let sn = listxRank (let StaticShX l = ssh in l)
           = XArray (numEltSum1Inner sn arr')
 
     in go $
diff --git a/src/Data/Array/Nested/Internal/Ranked.hs b/src/Data/Array/Nested/Internal/Ranked.hs
index 1518791..6a4db8e 100644
--- a/src/Data/Array/Nested/Internal/Ranked.hs
+++ b/src/Data/Array/Nested/Internal/Ranked.hs
@@ -227,7 +227,7 @@ rshape :: forall n a. Elt a => Ranked n a -> IShR n
 rshape (Ranked arr) = shCvtXR' (mshape arr)
 
 rrank :: Elt a => Ranked n a -> SNat n
-rrank = shrLengthSNat . rshape
+rrank = shrRank . rshape
 
 rindex :: Elt a => Ranked n a -> IIxR n -> a
 rindex (Ranked arr) idx = mindex arr (ixCvtRX idx)
@@ -235,14 +235,14 @@ rindex (Ranked arr) idx = mindex arr (ixCvtRX idx)
 rindexPartial :: forall n m a. Elt a => Ranked (n + m) a -> IIxR n -> Ranked m a
 rindexPartial (Ranked arr) idx =
   Ranked (mindexPartial @a @(Replicate n Nothing) @(Replicate m Nothing)
-            (castWith (subst2 (lemReplicatePlusApp (ixrLengthSNat idx) (Proxy @m) (Proxy @Nothing))) arr)
+            (castWith (subst2 (lemReplicatePlusApp (ixrRank idx) (Proxy @m) (Proxy @Nothing))) arr)
             (ixCvtRX idx))
 
 -- | __WARNING__: All values returned from the function must have equal shape.
 -- See the documentation of 'mgenerate' for more details.
 rgenerate :: forall n a. KnownElt a => IShR n -> (IIxR n -> a) -> Ranked n a
 rgenerate sh f
-  | sn@SNat <- shrLengthSNat sh
+  | sn@SNat <- shrRank sh
   , Dict <- lemKnownReplicate sn
   , Refl <- lemRankReplicate sn
   = Ranked (mgenerate (shCvtRX sh) (f . ixCvtXR))
@@ -274,7 +274,7 @@ rsumOuter1 = rfromPrimitive . rsumOuter1P . rtoPrimitive
 
 rtranspose :: forall n a. Elt a => PermR -> Ranked n a -> Ranked n a
 rtranspose perm arr
-  | sn@SNat <- shrLengthSNat (rshape arr)
+  | sn@SNat <- rrank arr
   , Dict <- lemKnownReplicate sn
   , length perm <= fromIntegral (natVal (Proxy @n))
   = rlift sn
@@ -291,7 +291,7 @@ rconcat
 rappend :: forall n a. Elt a
         => Ranked (n + 1) a -> Ranked (n + 1) a -> Ranked (n + 1) a
 rappend arr1 arr2
-  | sn@SNat <- shrLengthSNat (rshape arr1)
+  | sn@SNat <- rrank arr1
   , Dict <- lemKnownReplicate sn
   , Refl <- lemReplicateSucc @(Nothing @Nat) @n
   = coerce (mappend @Nothing @Nothing @(Replicate n Nothing))
@@ -302,7 +302,7 @@ rscalar x = Ranked (mscalar x)
 
 rfromVectorP :: forall n a. Storable a => IShR n -> VS.Vector a -> Ranked n (Primitive a)
 rfromVectorP sh v
-  | Dict <- lemKnownReplicate (shrLengthSNat sh)
+  | Dict <- lemKnownReplicate (shrRank sh)
   = Ranked (mfromVectorP (shCvtRX sh) v)
 
 rfromVector :: forall n a. PrimElt a => IShR n -> VS.Vector a -> Ranked n a
@@ -352,7 +352,7 @@ rfromOrthotope sn arr
 
 rtoOrthotope :: PrimElt a => Ranked n a -> S.Array n a
 rtoOrthotope (rtoPrimitive -> Ranked (M_Primitive sh (XArray arr)))
-  | Refl <- lemRankReplicate (shrLengthSNat $ shCvtXR' sh)
+  | Refl <- lemRankReplicate (shrRank $ shCvtXR' sh)
   = arr
 
 runScalar :: Elt a => Ranked 0 a -> a
@@ -412,12 +412,12 @@ rrerank sn sh2 f (rtoPrimitive -> arr) =
 rreplicate :: forall n m a. Elt a
            => IShR n -> Ranked m a -> Ranked (n + m) a
 rreplicate sh (Ranked arr)
-  | Refl <- lemReplicatePlusApp (shrLengthSNat sh) (Proxy @m) (Proxy @(Nothing @Nat))
+  | Refl <- lemReplicatePlusApp (shrRank sh) (Proxy @m) (Proxy @(Nothing @Nat))
   = Ranked (mreplicate (shCvtRX sh) arr)
 
 rreplicateScalP :: forall n a. Storable a => IShR n -> a -> Ranked n (Primitive a)
 rreplicateScalP sh x
-  | Dict <- lemKnownReplicate (shrLengthSNat sh)
+  | Dict <- lemKnownReplicate (shrRank sh)
   = Ranked (mreplicateScalP (shCvtRX sh) x)
 
 rreplicateScal :: forall n a. PrimElt a
@@ -427,13 +427,13 @@ rreplicateScal sh x = rfromPrimitive (rreplicateScalP sh x)
 rslice :: forall n a. Elt a => Int -> Int -> Ranked (n + 1) a -> Ranked (n + 1) a
 rslice i n arr
   | Refl <- lemReplicateSucc @(Nothing @Nat) @n
-  = rlift (shrLengthSNat (rshape arr))
+  = rlift (rrank arr)
           (\_ -> X.sliceU i n)
           arr
 
 rrev1 :: forall n a. Elt a => Ranked (n + 1) a -> Ranked (n + 1) a
 rrev1 arr =
-  rlift (shrLengthSNat (rshape arr))
+  rlift (rrank arr)
         (\(_ :: StaticShX sh') ->
           case lemReplicateSucc @(Nothing @Nat) @n of
             Refl -> X.rev1 @Nothing @(Replicate n Nothing ++ sh'))
@@ -442,8 +442,8 @@ rrev1 arr =
 rreshape :: forall n n' a. Elt a
          => IShR n' -> Ranked n a -> Ranked n' a
 rreshape sh' rarr@(Ranked arr)
-  | Dict <- lemKnownReplicate (shrLengthSNat (rshape rarr))
-  , Dict <- lemKnownReplicate (shrLengthSNat sh')
+  | Dict <- lemKnownReplicate (rrank rarr)
+  , Dict <- lemKnownReplicate (shrRank sh')
   = Ranked (mreshape (shCvtRX sh') arr)
 
 rflatten :: Elt a => Ranked n a -> Ranked 1 a
diff --git a/src/Data/Array/Nested/Internal/Shape.hs b/src/Data/Array/Nested/Internal/Shape.hs
index 7d95f61..4fa4284 100644
--- a/src/Data/Array/Nested/Internal/Shape.hs
+++ b/src/Data/Array/Nested/Internal/Shape.hs
@@ -91,14 +91,14 @@ listrIndex SZ (x ::: _) = x
 listrIndex (SS i) (_ ::: xs) | Refl <- lemLeqSuccSucc (Proxy @k) (Proxy @n) = listrIndex i xs
 listrIndex _ ZR = error "k + 1 <= 0"
 
-listrLengthSNat :: ListR n i -> SNat n
-listrLengthSNat ZR = SNat
-listrLengthSNat (_ ::: (sh :: ListR n i)) = snatSucc (listrLengthSNat sh)
+listrRank :: ListR n i -> SNat n
+listrRank ZR = SNat
+listrRank (_ ::: (sh :: ListR n i)) = snatSucc (listrRank sh)
 
 listrPermutePrefix :: forall i n. [Int] -> ListR n i -> ListR n i
 listrPermutePrefix = \perm sh ->
   listrFromList perm $ \sperm ->
-    case (listrLengthSNat sperm, listrLengthSNat sh) of
+    case (listrRank sperm, listrRank sh) of
       (permlen@SNat, shlen@SNat) -> case cmpNat permlen shlen of
         LTI -> let (pre, post) = listrSplitAt permlen sh in listrAppend (applyPermRFull permlen sperm pre) post
         EQI -> let (pre, post) = listrSplitAt permlen sh in listrAppend (applyPermRFull permlen sperm pre) post
@@ -168,8 +168,8 @@ ixrTail (IxR list) = IxR (listrTail list)
 ixrAppend :: forall n m i. IxR n i -> IxR m i -> IxR (n + m) i
 ixrAppend = coerce (listrAppend @_ @i)
 
-ixrLengthSNat :: IxR n i -> SNat n
-ixrLengthSNat (IxR sh) = listrLengthSNat sh
+ixrRank :: IxR n i -> SNat n
+ixrRank (IxR sh) = listrRank sh
 
 ixrPermutePrefix :: forall n i. [Int] -> IxR n i -> IxR n i
 ixrPermutePrefix = coerce (listrPermutePrefix @i)
@@ -237,8 +237,8 @@ shrTail (ShR list) = ShR (listrTail list)
 shrAppend :: forall n m i. ShR n i -> ShR m i -> ShR (n + m) i
 shrAppend = coerce (listrAppend @_ @i)
 
-shrLengthSNat :: ShR n i -> SNat n
-shrLengthSNat (ShR sh) = listrLengthSNat sh
+shrRank :: ShR n i -> SNat n
+shrRank (ShR sh) = listrRank sh
 
 shrPermutePrefix :: forall n i. [Int] -> ShR n i -> ShR n i
 shrPermutePrefix = coerce (listrPermutePrefix @i)