Alexander Udalov
67 lines
1.4 KiB
Kotlin
Vendored
67 lines
1.4 KiB
Kotlin
Vendored
@file:OptIn(ExperimentalContracts::class)
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import kotlin.contracts.InvocationKind
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import kotlin.contracts.contract
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import kotlin.contracts.ExperimentalContracts
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fun returnsTrue(condition: Boolean) {
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contract {
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returns(true) implies (condition)
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}
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}
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fun returnsNull(condition: Boolean) {
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contract {
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returns(null) implies (condition)
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}
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}
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fun returnsNotNull(condition: Boolean) {
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contract {
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returnsNotNull() implies (condition)
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}
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}
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fun Any?.receiverIsNotNull(): Boolean {
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contract {
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returns(true) implies (this@receiverIsNotNull != null)
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}
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return this != null
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}
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inline fun callsInPlaceAtMostOnce(block: () -> Unit) {
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contract {
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callsInPlace(block, InvocationKind.AT_MOST_ONCE)
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}
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}
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inline fun callsInPlaceUnknown(block: () -> Unit) {
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contract {
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callsInPlace(block, InvocationKind.UNKNOWN)
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}
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}
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fun conjunction(a: Boolean, b: Boolean, c: Boolean) {
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contract {
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returns() implies (a && !b && c)
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}
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}
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fun disjunction(a: Boolean, b: Boolean, c: Boolean) {
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contract {
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returns() implies (a || !b || c)
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}
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}
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fun complexBoolean(a: Any?, b: Any?, c: Any?, d: Any?) {
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contract {
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returns() implies ((a != null && c != null) || (b == null && d != null))
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}
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}
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fun negatedIsAndConjunction(a: Any?, b: Boolean, c: Any?) {
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contract {
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returns() implies (a !is List<*> && b && c == null)
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}
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}
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