free-category: Free category
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Properties
| Versions | 0.0.1.0, 0.0.2.0, 0.0.3.0, 0.0.4.0, 0.0.4.0, 0.0.4.1, 0.0.4.2, 0.0.4.3, 0.0.4.4, 0.0.4.5 |
|---|---|
| Change log | ChangeLog.md |
| Dependencies | base (>=4.9 && <5), free-algebras (>=0.0.8.0) [details] |
| License | MPL-2.0 |
| Copyright | (c) 2018-2019 Marcin Szamotulski |
| Author | Marcin Szamotulski |
| Maintainer | profunctor@pm.me |
| Category | Algebra, Control, Monads, Category |
| Home page | https://github.com/coot/free-category#readme |
| Bug tracker | https://github.com/coot/free-category/issues |
| Source repo | head: git clone https://github.com/coot/free-category |
| Uploaded | by coot at 2019-12-05T13:19:49Z |
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- free-category-0.0.4.0.tar.gz [browse] (Cabal source package)
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Readme for free-category-0.0.4.0
[back to package description]Free Category
This package contains efficient implementations of free categories. There are various representations available:
- real-time queues (C. Okasaki 'Pure Functional Data Structures')
- type aligned lists
- continuation passing style (Church encoding)
Free arrows and free Kleisli categories are also included.
Free categories are useful to model state machines in a simple yet type safe
manner. For that purpose Kleisli categories are a very useful target which
allows to include monadic computations. This package contains a useful
generalisation of Kliesli categories captured by EffectCategory class
(categories with effects), and a (free) transformer which lifts a category to
a category with effects.
Benchmarks
Check performance characteristics of various representations:
Resources
- LoginStateMachine:
based on State Machines All The Way
Down by Edwin Bradly, 2017 You
can run it with
cabal new-run examples:login-state-machine. - Read more here on a simple example of a finite state machine encoded using a free category using a simple GADT.
- Another example.
- Blog post on Kleisli categories.