diff options
Diffstat (limited to 'src/Data/Array/Nested/Shaped')
| -rw-r--r-- | src/Data/Array/Nested/Shaped/Shape.hs | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/Data/Array/Nested/Shaped/Shape.hs b/src/Data/Array/Nested/Shaped/Shape.hs index 10e1a9d..6eaec10 100644 --- a/src/Data/Array/Nested/Shaped/Shape.hs +++ b/src/Data/Array/Nested/Shaped/Shape.hs @@ -389,6 +389,13 @@ shsFromListS (_ ::$ l) = SNat :$$ shsFromListS l shsFromIxS :: IxS sh i -> ShS sh shsFromIxS (IxS l) = shsFromListS l +shsEnum :: ShS sh -> [IIxS sh] +shsEnum = \sh -> go sh id [] + where + go :: ShS sh -> (IIxS sh -> a) -> [a] -> [a] + go ZSS f = (f ZIS :) + go (n :$$ sh) f = foldr (.) id [go sh (f . (i :.$)) | i <- [0 .. fromSNat' n - 1]] + -- | Untyped: length is checked at runtime. instance KnownShS sh => IsList (ListS sh (Const i)) where |