./math/hs-semigroupoids, Semigroupoids: Category sans id

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Branch: CURRENT, Version: 6.0.1nb1, Package name: hs-semigroupoids-6.0.1nb1, Maintainer: pho

Provides a wide array of (semi)groupoids and operations for working with them.

A Semigroupoid is a Category without the requirement of identity arrows
for every object in the category.

A Category is any Semigroupoid for which the Yoneda lemma holds.

When working with comonads you often have the <*> portion of an Applicative,
but not the pure. This was captured in Uustalu and Vene's
"Essence of Dataflow Programming" in the form of the ComonadZip class
in the days before Applicative. Apply provides a weaker invariant,
but for the comonads used for data flow programming
(found in the streams package), this invariant is preserved.
Applicative function composition forms a semigroupoid.

Similarly many structures are nearly a comonad, but not quite,
for instance lists provide a reasonable extend operation in the form of tails,
but do not always contain a value.


Required to run:
[devel/hs-tagged] [devel/hs-hashable] [devel/hs-transformers-compat] [devel/hs-unordered-containers] [math/hs-distributive] [math/hs-semigroups] [devel/hs-base-orphans] [math/hs-contravariant] [math/hs-comonad] [math/hs-bifunctors] [lang/ghc88]

Required to build:
[pkgtools/cwrappers]

Master sites:

Filesize: 35.52 KB

Version history: (Expand)

CVS history: (Expand)


   2025-02-02 14:06:08 by Masatake Daimon | Files touched by this commit (1173) 
Log message:
Bump all Haskell packages after switching the default compiler.
   2025-01-30 05:20:41 by Masatake Daimon | Files touched by this commit (3) | Package updated
Log message:
math/hs-semigroupoids: update to semigroupoids-6.0.1

6.0.1 [2024.05.04]
------------------
* Fix a build error when compiling with `-f-contravariant`.
   2024-05-09 03:32:57 by Masatake Daimon | Files touched by this commit (1137) 
Log message:
Recursive revbump after changing the default Haskell compiler
   2024-05-02 06:15:24 by Masatake Daimon | Files touched by this commit (1) 
Log message:
math/hs-semigroupoids: Fix build with GHC 9.8

This breaks build with the currently default GHC 9.6. Please bear with me
until I switch the default compiler.
   2023-11-02 07:37:49 by Masatake Daimon | Files touched by this commit (1141) 
Log message:
Revbump all Haskell after updating lang/ghc96
   2023-10-30 08:45:17 by Masatake Daimon | Files touched by this commit (4) 
Log message:
math/hs-semigroupoids: Update to 6.0.0.1

The change log is too long to paste here. See
https://hackage.haskell.org/package/semigroupoids-6.0.0.1/changelog
   2023-10-09 06:55:01 by Masatake Daimon | Files touched by this commit (988) 
Log message:
Bump Haskell packages after updating lang/ghc94
   2022-02-26 04:58:36 by Masatake Daimon | Files touched by this commit (872) 
Log message:
Bump all Haskell packages after enabling "split sections" in mk/haskell.mk