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GHC 9.10.3 · lts/ghc-9.10.x · c74966e · 2026-09-27

Modulesemigroupoids-6.0.1Haskell2010

Data.Semigroupoid.Dual

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

1 type

Packagesemigroupoids-6.0.1
Exports1
LanguageHaskell2010
LicenceBSD-2-Clause
SourceDual.hs

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

Constructors

Dual
- getDual :: k2 b a

Instances3Category, Groupoid, Semigroupoid

Category k2 => Category (Dual k2)Defined in semigroupoids-6.0.1 · Data.Semigroupoid.Dual
Groupoid k2 => Groupoid (Dual k2)Defined in semigroupoids-6.0.1 · Data.Groupoid
Semigroupoid k2 => Semigroupoid (Dual k2)Defined in semigroupoids-6.0.1 · Data.Semigroupoid.Dual