Jiaxiang Chen
afcbd76c9e
This change is to fill the gap between Kotlin Collection classes(immutable) and Java Collection classes(mutable), to avoid calling an unsupported operation like remove() on an immutable class in jvm.
34 lines
954 B
Kotlin
Vendored
34 lines
954 B
Kotlin
Vendored
// TARGET_BACKEND: JVM
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class MyMap<K, V>: Map<K, V> {
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override val size: Int get() = 0
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override fun isEmpty(): Boolean = true
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override fun containsKey(key: K): Boolean = false
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override fun containsValue(value: V): Boolean = false
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override fun get(key: K): V? = null
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override val keys: Set<K> get() = throw UnsupportedOperationException()
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override val values: Collection<V> get() = throw UnsupportedOperationException()
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override val entries: Set<Map.Entry<K, V>> get() = throw UnsupportedOperationException()
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}
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fun expectUoe(block: () -> Unit) {
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try {
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block()
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throw AssertionError()
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} catch (e: UnsupportedOperationException) {
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}
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}
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fun box(): String {
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val myMap = MyMap<String, Int>()
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val map = myMap as java.util.Map<String, Int>
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expectUoe { map.put("", 1) }
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expectUoe { map.remove("") }
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expectUoe { map.putAll(myMap) }
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expectUoe { map.clear() }
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return "OK"
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}
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