Mikhail Glukhikh
9ef89447b3
Before this commit, sealed sub-class without state was considered a style issue. After this commit, sealed sub-class without state AND custom equals is considered a probable bug, because comparison of its instances is very fragile. Alternative fix (generate equals & hashCode by identity) is added.
21 lines
412 B
Plaintext
Vendored
21 lines
412 B
Plaintext
Vendored
// FIX: Generate equals & hashCode by identity
|
|
|
|
abstract class Base {
|
|
open val prop: Int
|
|
get() = 13
|
|
}
|
|
|
|
sealed class SC : Base() {
|
|
class U : SC() {
|
|
override fun equals(other: Any?): Boolean {
|
|
return this === other
|
|
}
|
|
|
|
override fun hashCode(): Int {
|
|
return System.identityHashCode(this)
|
|
}
|
|
}
|
|
|
|
override val prop: Int
|
|
get() = 42
|
|
} |