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./math/hs-free, Monads for free

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Branch: CURRENT, Version: 5.2nb5, Package name: hs-free-5.2nb5, Maintainer: pkgsrc-users

Free monads are useful for many tree-like structures and domain specific
languages.

If f is a Functor then the free Monad on f is the type of trees whose nodes
are labeled with the constructors of f. The word "free" is used in the
sense of "unrestricted" rather than "zero-cost": Free f makes no
constraining assumptions beyond those given by f and the definition of
Monad. As used here it is a standard term from the mathematical theory of
adjoint functors.

Cofree comonads are dual to free monads. They provide convenient ways to
talk about branching streams and rose-trees, and can be used to annotate
syntax trees. The cofree comonad can be seen as a stream parameterized by a
Functor that controls its branching factor.

Master sites:

https://hackage.haskell.org/package/free-5.2/ (Download)

Filesize: 57.403 KB

Version history: (Expand)

(2025-10-24) Package has been reborn
(2025-10-24) Package deleted from pkgsrc
(2025-08-13) Updated to version: hs-free-5.2nb5
(2025-07-15) Package has been reborn
(2025-07-15) Package deleted from pkgsrc
(2025-03-05) Updated to version: hs-free-5.2nb4

CVS history: (Expand)

2025-08-13 13:07:47 by Masatake Daimon | Files touched by this commit (1263)

Log message:
Bump all Haskell because lang/ghc910 has got a library change

2025-03-05 04:40:14 by Masatake Daimon | Files touched by this commit (1173)

Log message:
recursive revbump after patching lang/ghc910

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 08:45:25 by Masatake Daimon | Files touched by this commit (1)

Log message:
math/hs-free: Fix build with GHC 9.10

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 11:33:16 by Masatake Daimon | Files touched by this commit (2)

Log message:
math/hs-free: 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 11:53:51 by Masatake Daimon | Files touched by this commit (4)

Log message:
math/hs-free: Update to 5.2
5.2 [2023.03.12]
* Drop support for GHC 7.10 and earlier.
* Drop redundant Monad constraints on many functions and instances. These
  constraints were only present for compatibility with pre-7.10 versions of
  GHC, which free no longer supports.
* Add Eq, Eq1, Ord, Ord1, and Foldable instances for Ap in
  Control.Applicative.Free.
* Switch out bifunctors dependency for bifunctor-classes-compat.

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