pyos
23 lines
444 B
Kotlin
Vendored
23 lines
444 B
Kotlin
Vendored
// FIR_IDENTICAL
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import kotlin.contracts.*
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@Suppress("OPT_IN_USAGE_ERROR", "OPT_IN_USAGE_FUTURE_ERROR")
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fun exactlyOnce(f: () -> Unit) {
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contract {
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callsInPlace(f, InvocationKind.EXACTLY_ONCE)
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}
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f()
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}
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fun test() {
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var s: String? = ""
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if (s != null) {
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val block: () -> Unit
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exactlyOnce {
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block = { s = null }
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}
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block()
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<!SMARTCAST_IMPOSSIBLE!>s<!>.length
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}
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}
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