typelevel / typelevel/cats

Scala 3: Support `mapN` for tuples greater than 22

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#4,746 3 comments 1 reaction 0 assignees View on GitHub

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Dominant language
Scala
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Description

Contributor guide

Open the contributing guide

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.

Research direction

Start by reading project/Boilerplate.scala around line 56 and trace how version-specific code is generated. Determine how the generator should cover Scala 3 tuples beyond arity 22, then verify the generated mapN APIs and the relevant test suite. Done means Scala 3 users can use mapN with tuples greater than 22 without breaking existing supported versions.

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
42/100

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