4.4.1

• Using SafeHaskell, GHC 7.8+ Data.Profunctor.Unsafe now infers as Trustworthy and many more modules now infer as Safe.
• We now build warning-free on GHC 7.10.0.20150307

4.4

• Added Coercible constraint to (#.) and (.#) when building with GHC 7.8
• Strong is now a superclass of Representable
• Updated the URL of the “Arrows are Strong Monads” paper. The old URL is now a dead link.

4.3.2

• Added some missing instances for UpStar and DownStar.

4.3

• Removed the non law-abiding instance for Closed (Forget r)
• Forget is Representable
• MINIMAL pragmas

4.2.0.1

• Avoided using ‘type’ in the export list, as that doesn’t work on 7.4.

4.2

• Renamed -| to ProfunctorAdjunction because GHC 7.4 still exists in the wild.
• Renamed -/-> to :-> for the same reason. Also the former was confusing as they conflated profunctor homomorphisms and profunctors themselves.

4.1

• Flipped the order of ‘Procompose’
• Added the notion of Monads and Comonads on the category of profunctors.
• Added ‘Cayley’ which takes normal Haskell Monads and Comonads to a ‘ProfunctorMonad’ and ‘ProfunctorComonad’ respectively. Cayley is also known as the ‘static arrow’ construction
• Added ‘Closed’ which is adjoint to ‘Strong’.
• Added ‘Closure’ which freely adjoins ‘Closed’ to any ‘Profunctor’.
• Added ‘Tambara’ which freely adjoins ‘Strong’ to any ‘Profunctor’.
• Added ‘Cotambara’ which freely adjoins ‘Choice’ to any ‘Profunctor’.
• Under the new ‘Procompose’ the old ‘Rift’ is now ‘Ran’, and the old ‘Lift’ was misnamed. It is now ‘Rift’

4.0.3

• Added Data.Profunctor.Lift containing the left Kan lift of a profunctor.

4.0.2

• Added assoc to Data.Profunctor.Composition so that we have all 3 associators.

4.0

• Merged the contents of profunctor-extras into profunctors.

3.3

• Added instance Choice (Upstar f) and introduced Forget.

3.2

• Renamed Lenticular and Prismatic to Strong and Choice, and restructured them.

3.1.3

• Removed upper bounds on my own intra-package dependencies

3.1.1

• Added Documentation!
• Added Lenticular and Prismatic Profunctors

3.1

• instance Profunctor Tagged

3.0

• Updated version number to match the rest of my libraries