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GHC 10.0.0.20260917 · lts/ghc-10.0.x · fc4e598 · 2026-10-11

Modulesemigroupoids-6.0.2Haskell2010

Data.Semigroupoid.Dual

A semigroupoid satisfies all of the requirements to be a Category except for the existence of identity arrows.

1 type

Packagesemigroupoids-6.0.2
Exports1
LanguageHaskell2010
LicenceBSD-2-Clause
SourceDual.hs

newtypenewtype Dual (k2 :: k -> k1 -> Type) (a :: k1) (b :: k)

Constructors

Dual
- getDual :: k3 b a

Instances3Category, Groupoid, Semigroupoid

Category k => Category (Dual k)Defined in semigroupoids-6.0.2 · Data.Semigroupoid.Dual
Groupoid k => Groupoid (Dual k)Defined in semigroupoids-6.0.2 · Data.Groupoid
Semigroupoid k => Semigroupoid (Dual k)Defined in semigroupoids-6.0.2 · Data.Semigroupoid.Dual