Andrey Zinovyev
30 lines
875 B
Kotlin
Vendored
30 lines
875 B
Kotlin
Vendored
// FIR_IDENTICAL
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// !CHECK_TYPE
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// KT-1410 Compiler does automatically infer type argument when using variance
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//+JDK
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package d
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import checkSubtype
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public fun <T> MutableCollection<out T>.filterToMy(result : MutableList<in T>, filter : (T) -> Boolean) : MutableCollection<out T> {
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for (t in this){
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if (filter(t)){
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result.add(t)
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}
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}
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return this
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}
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fun foo(result: MutableList<in String>, collection: MutableCollection<String>, prefix : String){
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collection.filterToMy(result, {it.startsWith(prefix)})
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}
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fun test(result: MutableList<in Any>, collection: MutableCollection<String>, prefix : String){
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val c = collection.filterToMy(result, {it.startsWith(prefix)})
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checkSubtype<MutableCollection<out String>>(c)
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}
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//from library
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fun String.startsWith(prefix: String) : Boolean {<!NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY!>}<!>
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