Add Divisible and Decideable (contravariant Applicative and co.)
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help wanted
- Dominant language
- Scala
- Stars
- 5.5k
- Forks
- 1.2k
- Avg merge
- 2d 10h
- Merged PRs (30d)
- 5
Description
https://hackage.haskell.org/package/contravariant-1.4/docs/Data-Functor-Contravariant-Divisible.html
Example use case: divide can be seen as a way of deriving behavior by splitting a "larger" type in two
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the linked Hackage documentation for Divisible and Decideable, then read the issue's discussion to understand the intended contravariant Applicative-related additions. The payload names no repository files or tests, so locate the relevant typeclass definitions and existing instances before assessing the scope. Done means the requested abstractions and their supporting changes are implemented consistently with Cats.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- scala
- Domain
- tooling
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100