Hacktoberfest 2026: the issues maintainers tagged for October, open and beginner-friendly. Browse Hacktoberfest issues

ListT done right in transformers

Open
#90 4 comments 2 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty
5/5
Estimated time
Over a week
Newbie friendliness
45/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Quiet
Tech stack
haskell
Domain
tooling

Research direction

Start by reviewing the current ListT implementation and deprecation status in transformers, then compare its intended replacement with Gabriella Gonzalez's list-transformer package linked in the issue. Resolve the API and integration approach with the open discussion; done means transformers provides a proper ListT implementation that addresses the deprecation.

Written by the indexing model from the issue text.

Description

[original issue 88 by hecate a.k.a. @Kleidukos]

Since ListT has been properly deprecated now, it would be nice to have a proper implementation in transformers nowadays. Gabriella Gonzalez's list-tranformer package¹ would be a suitable replacement.

What do you think?

¹ https://hackage.haskell.org/package/list-transformer

Dominant language
Haskell
Stars
5
Forks
10
PR merge metrics
No merged PRs in 30d

Getting set up

This project ships no dev container, Dockerfile or contributing guide, so setting up is up to you: start from its README, and see our first-contribution guide for the general steps.

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

More from haskell/transformers

All issues in haskell/transformers

Similar issues

More Haskell issues

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.