https://github.com/fumieval/incremental

Type class for patch and diff
https://github.com/fumieval/incremental

diff haskell

Last synced: 2 months ago
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Type class for patch and diff

• Host: GitHub
• URL: https://github.com/fumieval/incremental
• Owner: fumieval
• License: bsd-3-clause
• Created: 2017-08-02T04:52:19.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2020-09-19T05:36:49.000Z (over 4 years ago)
• Last Synced: 2024-09-30T23:47:39.350Z (3 months ago)
• Topics: diff, haskell
• Language: Haskell
• Homepage:
• Size: 21.5 KB
• Stars: 8
• Watchers: 5
• Forks: 1
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

        
# incremental: incremental update interface

[![Hackage](https://img.shields.io/hackage/v/incremental.svg)](https://hackage.haskell.org/package/incremental)

![Haskell CI](https://github.com/fumieval/incremental/workflows/Haskell%20CI/badge.svg)

[![Discord](https://img.shields.io/discord/664807830116892674?color=%237095ec&label=Discord&style=plastic)](https://discord.gg/DG93Tgs)

This package provides a typeclass for incremental updates and diffing.

```haskell

class Incremental a where

  -- | the difference type

  type Delta a

  -- | @'maybe' a ('patch' a) ('diff' b a) ≡ b@

  patch :: a -> Delta a -> a

  -- | returns 'Nothing' when there is no update

  diff :: a -> a -> Maybe (Delta a)

```