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Backport "Use final result type to check selector bound" to LTS #21166

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Merged
merged 1 commit into from
Jul 11, 2024
Merged

Backport "Use final result type to check selector bound" to LTS #21166

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2 changes: 1 addition & 1 deletion compiler/src/dotty/tools/dotc/transform/CheckUnused.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -729,7 +729,7 @@ object CheckUnused:
if selector.isGiven then
// Further check that the symbol is a given or implicit and conforms to the bound
sym.isOneOf(Given | Implicit)
&& (selector.bound.isEmpty || sym.info <:< selector.boundTpe)
&& (selector.bound.isEmpty || sym.info.finalResultType <:< selector.boundTpe)
else
// Normal wildcard, check that the symbol is not a given (but can be implicit)
!sym.is(Given)
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3 changes: 3 additions & 0 deletions tests/pos/i20860.scala
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@@ -0,0 +1,3 @@
def `i20860 use result to check selector bound`: Unit =
import Ordering.Implicits.given Ordering[?]
summon[Ordering[Seq[Int]]]