Svyatoslav Kuzmich
21 lines
659 B
Kotlin
Vendored
21 lines
659 B
Kotlin
Vendored
// WITH_RUNTIME
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// !LANGUAGE: -UseBuilderInferenceOnlyIfNeeded
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import kotlin.experimental.ExperimentalTypeInference
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@OptIn(ExperimentalTypeInference::class)
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fun <K, V> buildMap(@BuilderInference builderAction: MutableMap<K, V>.() -> Unit): Map<K, V> = mapOf()
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fun foo(): MutableMap<CharSequence, *> = mutableMapOf<CharSequence, String>()
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fun <E> MutableMap<E, *>.swap(x: MutableMap<E, *>) {}
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@OptIn(ExperimentalStdlibApi::class)
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fun box(): String {
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val x: Map<in String, String> = buildMap {
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put("", "")
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swap(foo())
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} // `Map<CharSequence, String>` if we use builder inference, `Map<String, String>` if we don't
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return "OK"
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}
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