Kirill Rakhman
27 lines
652 B
Kotlin
Vendored
27 lines
652 B
Kotlin
Vendored
// LANGUAGE: -ContractSyntaxV2
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// WITH_STDLIB
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import kotlin.contracts.*
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inline fun <reified T> requreIsInstance(value: Any) contract <!UNSUPPORTED_FEATURE!>[
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returns() implies (value is T)
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]<!> {
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if (value !is T) throw IllegalArgumentException()
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}
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val Any?.myLength: Int?
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get() contract <!CONTRACT_NOT_ALLOWED, UNSUPPORTED_FEATURE!>[
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<!ERROR_IN_CONTRACT_DESCRIPTION!>returnsNotNull() implies (this@length is String)<!>
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]<!> = (this as? String)?.length
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fun test_1(x: Any) {
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requreIsInstance<String>(x)
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x.length
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}
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fun test_2(x: Any) {
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if (x.myLength != null) {
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x.<!UNRESOLVED_REFERENCE!>length<!>
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}
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}
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