Dmitriy Novozhilov
24 lines
479 B
Kotlin
Vendored
24 lines
479 B
Kotlin
Vendored
// LANGUAGE: +ContractSyntaxV2
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import kotlin.contracts.*
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fun printStr(str: String?) contract [
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returns() implies (str != null)
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] {
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require(str != null)
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println(str)
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}
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fun callExactlyOnce(block: () -> Int) contract [
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callsInPlace(block, InvocationKind.EXACTLY_ONCE)
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] {
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val num = block()
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println(num)
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}
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fun calculateNumber(block: () -> Int): Int contract [
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callsInPlace(block, InvocationKind.EXACTLY_ONCE)
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] {
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val num = block()
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return num
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}
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