OptIn

Platform and version requirements: JVM (1.3), JS (1.3), Native (1.3)

@Target([AnnotationTarget.CLASS, AnnotationTarget.PROPERTY, AnnotationTarget.LOCAL_VARIABLE, AnnotationTarget.VALUE_PARAMETER, AnnotationTarget.CONSTRUCTOR, AnnotationTarget.FUNCTION, AnnotationTarget.PROPERTY_GETTER, AnnotationTarget.PROPERTY_SETTER, AnnotationTarget.EXPRESSION, AnnotationTarget.FILE, AnnotationTarget.TYPEALIAS]) annotation class OptIn

Allows to use the API denoted by the given markers in the annotated file, declaration, or expression. If a declaration is annotated with OptIn, its usages are not required to opt in to that API.

This class requires opt-in itself and can only be used with the compiler argument -Xopt-in=kotlin.RequiresOptIn.

Constructors

Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

<init>

Allows to use the API denoted by the given markers in the annotated file, declaration, or expression. If a declaration is annotated with OptIn, its usages are not required to opt in to that API.

OptIn(vararg markerClass: KClass<out Annotation>)

Properties

Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

markerClass

vararg val markerClass: Array<out KClass<out Annotation>>

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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-opt-in/index.html