| Safe Haskell | None |
|---|
Data.Groupoid
- class Semigroupoid k => Groupoid k where
- inv :: k a b -> k b a
Documentation
class Semigroupoid k => Groupoid k whereSource
semigroupoid with inverses. This technically should be a category with inverses, except we need to use Ob to define the valid objects for the category
Instances
| (Semigroupoid (Dual k), Groupoid k) => Groupoid (Dual k) | |
| (Semigroupoid (Iso k), Semigroupoid k) => Groupoid (Iso k) |