All arrays are Eq and Ord (they compare shape first, then values)HEADmaster

This comparison policy is lifted straight from orthotope (and indeed the
instances are all just auto-derived).

1 files changed, 6 insertions, 0 deletions

diff --git a/src/Data/Array/Nested/Internal/Mixed.hs b/src/Data/Array/Nested/Internal/Mixed.hs
index 5417a1c..d8b7912 100644
--- a/src/Data/Array/Nested/Internal/Mixed.hs
+++ b/src/Data/Array/Nested/Internal/Mixed.hs
@@ -155,8 +155,14 @@ newtype instance Mixed sh () = M_Nil (Mixed sh (Primitive ())) deriving (Eq, Ord
 data instance Mixed sh (a, b) = M_Tup2 !(Mixed sh a) !(Mixed sh b) deriving (Generic)
 -- etc., larger tuples (perhaps use generics to allow arbitrary product types)
 
+deriving instance (Eq (Mixed sh a), Eq (Mixed sh b)) => Eq (Mixed sh (a, b))
+deriving instance (Ord (Mixed sh a), Ord (Mixed sh b)) => Ord (Mixed sh (a, b))
+
 data instance Mixed sh1 (Mixed sh2 a) = M_Nest !(IShX sh1) !(Mixed (sh1 ++ sh2) a) deriving (Generic)
 
+deriving instance Eq (Mixed (sh1 ++ sh2) a) => Eq (Mixed sh1 (Mixed sh2 a))
+deriving instance Ord (Mixed (sh1 ++ sh2) a) => Ord (Mixed sh1 (Mixed sh2 a))
+
 
 -- | Internal helper data family mirroring 'Mixed' that consists of mutable
 -- vectors instead of 'XArray's.