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-rw-r--r--src/Data/Array/Nested/Internal/Ranked.hs3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/Data/Array/Nested/Internal/Ranked.hs b/src/Data/Array/Nested/Internal/Ranked.hs
index 735d1a3..ffa1cea 100644
--- a/src/Data/Array/Nested/Internal/Ranked.hs
+++ b/src/Data/Array/Nested/Internal/Ranked.hs
@@ -524,3 +524,6 @@ mtoRanked arr
convSh (smn :$% (sh :: IShX sh'T))
| Refl <- lemReplicateSucc @(Nothing @Nat) @(Rank sh'T)
= SUnknown (fromSMayNat' smn) :$% convSh sh
+
+rtoMixed :: forall n a. Elt a => Ranked n a -> Mixed (Replicate n Nothing) a
+rtoMixed (Ranked arr) = arr