softwaremill / softwaremill/quicklens

Setting a Double field using a Int doesn't work in Scala3

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Dominant language
Scala
Stars
852
Forks
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No merged PRs in 30d

Description

To reproduce:

case class X(a: Double)
X(0).modify(_.a).setTo(1)

Originally reported as part of #114

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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 running the Scala 3 reproduction in the issue: case class X(a: Double); X(0).modify(_.a).setTo(1). Then trace the Quicklens Scala 3 implementation to find why an Int cannot be used for the Double field; done means this example compiles and works as expected.

Written by the indexing model from the issue text.

Assessment

Tech stack
scala
Domain
tooling
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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