Kristoffer Andersen
61e6d346aa
When a property backed by a final field is the delegate for interface implementation by delegation, the backend should reuse the backing field rather than introduce a new, extraneous `$$delegate_n` field.
50 lines
1.1 KiB
Kotlin
Vendored
50 lines
1.1 KiB
Kotlin
Vendored
// IGNORE_BACKEND_FIR: JVM_IR
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// TARGET_BACKEND: JVM
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// WITH_RUNTIME
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// FULL_JDK
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interface IActing {
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fun act(): String
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}
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class CActing(val value: String = "OK") : IActing {
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override fun act(): String = value
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}
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// final so no need in delegate field
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class Test(val acting: CActing = CActing()) : IActing by acting {
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}
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// even if open so we don't need delegate field
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open class Test2(open val acting: CActing = CActing()) : IActing by acting {
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}
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// even if open the backing field is final, so we don't need delegate field
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class Test3() : Test2() {
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override val acting = CActing("OKOK")
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}
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fun box(): String {
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try {
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Test::class.java.getDeclaredField("\$\$delegate_0")
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return "\$\$delegate_0 field generated for class Test but should not"
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}
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catch (e: NoSuchFieldException) {
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// ok
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}
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try {
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Test2::class.java.getDeclaredField("\$\$delegate_0")
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return "\$\$delegate_0 field generated for class Test2 but should not"
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}
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catch (e: NoSuchFieldException) {
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// ok
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}
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if (Test3().acting.act() != "OKOK") return "Fail Test3"
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val test = Test()
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return test.act()
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}
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