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| author | Tom Smeding <tom@tomsmeding.com> | 2025-11-18 12:57:17 +0100 |
|---|---|---|
| committer | Tom Smeding <tom@tomsmeding.com> | 2025-11-18 12:57:17 +0100 |
| commit | a158f928c6d617fa950f74c517e94c5062422efd (patch) | |
| tree | a82cc806c9b2cfd45183e6b65f98c377575af41a /src/Data/Array/Nested/Shaped | |
| parent | e53b10d35bdb414520ac1d5b00307c4c62a9e1db (diff) | |
The explicit usage at Int in the non-primed versions of the functions
results in an auto-generated SPEC rule at Int, so even without any
SPECIALIZE pragmas, using sh?Enum' at Int should not (need to) result in
multiple specialisations.
Diffstat (limited to 'src/Data/Array/Nested/Shaped')
| -rw-r--r-- | src/Data/Array/Nested/Shaped/Shape.hs | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/Data/Array/Nested/Shaped/Shape.hs b/src/Data/Array/Nested/Shaped/Shape.hs index 6eaec10..582cc50 100644 --- a/src/Data/Array/Nested/Shaped/Shape.hs +++ b/src/Data/Array/Nested/Shaped/Shape.hs @@ -390,11 +390,15 @@ shsFromIxS :: IxS sh i -> ShS sh shsFromIxS (IxS l) = shsFromListS l shsEnum :: ShS sh -> [IIxS sh] -shsEnum = \sh -> go sh id [] +shsEnum = shsEnum' + +{-# INLINABLE shsEnum' #-} -- ensure this can be specialised at use site +shsEnum' :: Num i => ShS sh -> [IxS sh i] +shsEnum' = \sh -> go sh id [] where - go :: ShS sh -> (IIxS sh -> a) -> [a] -> [a] + go :: Num i => ShS sh -> (IxS sh i -> a) -> [a] -> [a] go ZSS f = (f ZIS :) - go (n :$$ sh) f = foldr (.) id [go sh (f . (i :.$)) | i <- [0 .. fromSNat' n - 1]] + go (n :$$ sh) f = foldr (.) id [go sh (f . (fromIntegral i :.$)) | i <- [0 .. fromSNat' n - 1]] -- | Untyped: length is checked at runtime. |