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20ea77d55d
* If `toArray` is inherited from Java, it may take an argument or
return a value of a flexible type, which looks nullable in IR;
* The returned array may also have `out` variance of the type
argument;
* `Array<T>` is not the same as `Array<Any?>` if `T` is neither `Any`
nor `in Something`, so presence of `toArray(): Array<T>` does not
mean we don't need to generate a new `toArray`.
52 lines
1.8 KiB
Kotlin
Vendored
52 lines
1.8 KiB
Kotlin
Vendored
// IGNORE_BACKEND_FIR: JVM_IR
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// TARGET_BACKEND: JVM
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// The old backend thinks `toArray(): Array<Int?>` is the same as `toArray(): Array<Any?>`
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// IGNORE_BACKEND: JVM
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// WITH_RUNTIME
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// FILE: MyListWithCustomToArray.java
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public abstract class MyListWithCustomToArray<E> extends java.util.AbstractList<E> {
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public Object[] toArray() {
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return new Object[]{null};
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}
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public <T> T[] toArray(T[] a) {
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return a;
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}
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}
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// FILE: a.kt
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class MyList<T>(val list: List<T>): java.util.AbstractList<T>() {
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override fun get(index: Int): T = list[index]
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override val size: Int
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get() = list.size
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}
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class MyListSubclass<T>(val list: List<T>): MyListWithCustomToArray<T>() {
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override fun get(index: Int): T = list[index]
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override val size: Int
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get() = list.size
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}
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class MyCollection<T>(val list: List<T>) : Collection<T> by list {
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fun toArray(): Array<Int?> =
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arrayOfNulls<Int>(0)
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}
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fun box(): String {
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val list1 = MyList(listOf(2, 3, 9)) as java.util.Collection<*>
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list1.toArray().contentToString().let { if (it != "[2, 3, 9]") return "fail 1: $it" }
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list1.toArray(arrayOfNulls<Int>(0)).contentToString().let { if (it != "[2, 3, 9]") return "fail 2: $it" }
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val list2 = MyListSubclass(listOf(2, 3, 9)) as java.util.Collection<*>
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list2.toArray().contentToString().let { if (it != "[null]") return "fail 3: $it" }
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list2.toArray(arrayOfNulls<Int>(1)).contentToString().let { if (it != "[null]") return "fail 4: $it" }
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val list3 = MyCollection(listOf(2, 3, 9)) as java.util.Collection<*>
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list3.toArray().contentToString().let { if (it != "[2, 3, 9]") return "fail 5: $it" }
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list3.toArray(arrayOfNulls<Int>(0)).contentToString().let { if (it != "[2, 3, 9]") return "fail 6: $it" }
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return "OK"
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}
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