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Free categories, free arrows and free categories with monadic actions
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README.md

Free Category

Maintainer: coot CircleCI

This package contains efficient implementation of free categories. There are various resentations available:

  • real-time queues (C. Okasaki 'Pure Functional Data Structures')
  • type aligned lists
  • continuation passing style

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 presentations free categories:

Some examples