Add sealed option to mayHaveCommonChild #17194
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sjrd
requested changes
Mar 31, 2023
| */ | ||
| final def mayHaveCommonChild(that: ClassSymbol)(using Context): Boolean = | ||
| !this.is(Final) && !that.is(Final) && (this.is(Trait) || that.is(Trait)) || | ||
| !this.isOneOf(FinalOrSealed) && !that.isOneOf(FinalOrSealed) && (this.is(Trait) || that.is(Trait)) || |
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That's not valid, because the following hierarchy is allowed:
sealed trait A
sealed trait B
class C extends A with B
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Should fix #16899