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Add contract for takeUnless

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This commit is contained in:
Dmitry Savvinov
2017-10-13 18:35:13 +03:00
parent 0b88e7cfd0
commit edd3f76e7b
1 changed files with 3 additions and 0 deletions
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libraries/stdlib/src/kotlin/util/Standard.kt
+3
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@@ -113,6 +113,9 @@ public inline fun <T> T.takeIf(predicate: (T) -> Boolean): T? {
@kotlin.internal.InlineOnly @kotlin.internal.InlineOnly
@SinceKotlin("1.1") @SinceKotlin("1.1")
public inline fun <T> T.takeUnless(predicate: (T) -> Boolean): T? { public inline fun <T> T.takeUnless(predicate: (T) -> Boolean): T? {
contract {
callsInPlace(predicate, InvocationKind.EXACTLY_ONCE)
}
return if (!predicate(this)) this else null return if (!predicate(this)) this else null
} }