Arsen Nagdalian
10 lines
332 B
Kotlin
Vendored
10 lines
332 B
Kotlin
Vendored
import kotlin.contracts.*
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fun calculateNumber(block: () -> Int): Int contract [
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callsInPlace(block, InvocationKind.EXACTLY_ONCE)
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] = block()
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fun <R> calculateResult(num: Int?, calculate: (Int?) -> R): R contract [
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callsInPlace(calculate, InvocationKind.EXACTLY_ONCE),
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returns() implies (num != null)
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] = calculate(num) |