softwaremill / softwaremill/tapir

Support Codec derivation for opaque types

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Dominant language
Scala
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Description

Create new macro in scala3 sources that will try to derive codec for "value classes" implemented as opaque types.

Contributor guide

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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 locating the Scala 3 sources and the existing codec derivation implementation. Determine how opaque types used as value classes should be handled, then verify that the new macro derives the expected codec behavior for those types using the project's existing test structure.

Written by the indexing model from the issue text.

Assessment

Tech stack
scala
Domain
api
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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