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Exclude Selectable from unused member warning #23323

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som-snytt opened this issue Jun 6, 2025 · 1 comment · May be fixed by #23325
Open

Exclude Selectable from unused member warning #23323

som-snytt opened this issue Jun 6, 2025 · 1 comment · May be fixed by #23325

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@som-snytt
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Follow up #22729 (comment)

Discussed in #23322

Originally posted by spavikevik June 5, 2025
We've been using Selectable extensively for fixtures in tests like this:

val f = new Selectable {
  val userId = Some("...")
}

But updating to Scala 3.7.x we are seeing a bunch of unused private member warnings, presumably because of #22729. Is this going to be a permanent limitation from Scala 3.7.x on? And if so, what would be the recommended way to fix the warnings?

Or can this be addressed in a subsequent release?
@som-snytt som-snytt linked a pull request Jun 6, 2025 that will close this issue
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@som-snytt
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The existing check used an explicit refinement to "silence" the warning for a member of an anonymous class.

The PR uses the inferred refinement for a Selectable for the same purpose.

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Take inferred or explicit refinement result for unused check som-snytt/dotty
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