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-rw-r--r--src/Data/Array/Mixed/Permutation.hs3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/Data/Array/Mixed/Permutation.hs b/src/Data/Array/Mixed/Permutation.hs
index 6ff3bdc..e1e5c44 100644
--- a/src/Data/Array/Mixed/Permutation.hs
+++ b/src/Data/Array/Mixed/Permutation.hs
@@ -66,6 +66,9 @@ class KnownPerm l where makePerm :: Perm l
instance KnownPerm '[] where makePerm = PNil
instance (KnownNat n, KnownPerm l) => KnownPerm (n : l) where makePerm = natSing `PCons` makePerm
+-- | Untyped permutations for ranked arrays
+type PermR = [Int]
+
-- ** Applying permutations