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Diffstat (limited to 'src/Data/Array/Mixed/Shape.hs')
| -rw-r--r-- | src/Data/Array/Mixed/Shape.hs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/Data/Array/Mixed/Shape.hs b/src/Data/Array/Mixed/Shape.hs index 1d3e60a..b5a4cb9 100644 --- a/src/Data/Array/Mixed/Shape.hs +++ b/src/Data/Array/Mixed/Shape.hs @@ -31,6 +31,7 @@ import Data.Kind (Type, Constraint) import Data.Monoid (Sum(..)) import Data.Proxy import Data.Type.Equality +import GHC.Exts (withDict) import GHC.Generics (Generic) import GHC.IsList (IsList) import GHC.IsList qualified as IsList @@ -469,6 +470,9 @@ instance KnownShX '[] where knownShX = ZKX instance (KnownNat n, KnownShX sh) => KnownShX (Just n : sh) where knownShX = SKnown natSing :!% knownShX instance KnownShX sh => KnownShX (Nothing : sh) where knownShX = SUnknown () :!% knownShX +withKnownShX :: forall sh r. StaticShX sh -> (KnownShX sh => r) -> r +withKnownShX sh = withDict @(KnownShX sh) sh + -- * Flattening |