https://github.com/co-log/co-log-polysemy

https://github.com/co-log/co-log-polysemy

co-log extensible-effects hacktoberfest haskell logging logging-library polysemy

Last synced: 9 months ago
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• Host: GitHub
• URL: https://github.com/co-log/co-log-polysemy
• Owner: co-log
• License: mpl-2.0
• Created: 2021-10-02T17:43:08.000Z (over 4 years ago)
• Default Branch: main
• Last Pushed: 2025-08-13T14:33:12.000Z (10 months ago)
• Last Synced: 2025-09-18T13:05:31.296Z (9 months ago)
• Topics: co-log, extensible-effects, hacktoberfest, haskell, logging, logging-library, polysemy
• Language: Haskell
• Homepage:
• Size: 61.5 KB
• Stars: 6
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE
  • Codeowners: .github/CODEOWNERS

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README

          
# co-log-polysemy

![Co-logo](https://user-images.githubusercontent.com/8126674/80955687-92f21a80-8df7-11ea-90d3-422dafdc8391.png)

[![GitHub CI](https://github.com/co-log/co-log-polysemy/workflows/CI/badge.svg)](https://github.com/co-log/co-log-polysemy/actions)

[![Hackage][hk-img-ps]][hk-ps]

[![MPL-2.0 license](https://img.shields.io/badge/license-MPL--2.0-blue.svg)](https://github.com/co-log/co-log/blob/main/LICENSE)

`co-log-polysemy` package is a implementation of the 

[co-log-core](http://hackage.haskell.org/package/co-log-core) logging based on 

the [polysemy](http://hackage.haskell.org/package/polysemy) extensible 

effects library.

## How to use

`co-log-polysemy` is compatible with the following GHC

versions - [supported versions](https://matrix.hackage.haskell.org/#/package/co-log-polysemy)

In order to start using `co-log-polysemy` in your project, you

will need to set it up with these easy steps:

1. Add the dependency on `co-log-polysemy` in your project's

   `.cabal` file. For this, you should modify the `build-depends`

   section according to the below section:

   ```haskell

   build-depends: base ^>= LATEST_SUPPORTED_BASE

                , co-log-core ^>= LATEST_VERSION

                , polysemy ^>= LATEST_VERSION

   ```

2. To use this package, refer to the below example 

   ```haskell

   module Main (main) where

   import Prelude hiding (log)

   import Polysemy (Member, Sem, runM)

   import Colog.Core.IO (logStringStdout)

   import Colog.Polysemy (Log, log, runLogAction)

   example :: Member (Log String) r => Sem r ()

   example = do

        log @String "First message..."

        log @String "Second message..."

   main :: IO ()

   main = runM $ runLogAction @IO logStringStdout example

   ```

[hk-img-ps]: https://img.shields.io/hackage/v/co-log-polysemy.svg?logo=haskell

[hk-ps]: https://hackage.haskell.org/package/co-log-polysemy