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/*
* Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
*/
package kotlin.jvm
import kotlin.annotation.AnnotationTarget.*
/**
* Instructs the Kotlin compiler to generate overloads for this function that substitute default parameter values.
*
* If a method has N parameters and M of which have default values, M overloads are generated: the first one
* takes N-1 parameters (all but the last one that takes a default value), the second takes N-2 parameters, and so on.
*/
@Target(FUNCTION, CONSTRUCTOR)
@MustBeDocumented
@OptionalExpectation
public expect annotation class JvmOverloads()
/**
* Specifies that an additional static method needs to be generated from this element if it's a function.
* If this element is a property, additional static getter/setter methods should be generated.
*
* See the [Kotlin language documentation](https://kotlinlang.org/docs/reference/java-to-kotlin-interop.html#static-methods)
* for more information.
*/
@Target(FUNCTION, PROPERTY, PROPERTY_GETTER, PROPERTY_SETTER)
@MustBeDocumented
@OptionalExpectation
public expect annotation class JvmStatic()
/**
* Specifies the name for the Java class or method which is generated from this element.
*
* See the [Kotlin language documentation](https://kotlinlang.org/docs/reference/java-to-kotlin-interop.html#handling-signature-clashes-with-jvmname)
* for more information.
* @property name the name of the element.
*/
@Target(FILE, FUNCTION, PROPERTY_GETTER, PROPERTY_SETTER)
@MustBeDocumented
@OptionalExpectation
public expect annotation class JvmName(val name: String)
/**
* Instructs the Kotlin compiler to generate a multifile class with top-level functions and properties declared in this file as one of its parts.
* Name of the corresponding multifile class is provided by the [JvmName] annotation.
*/
@Target(FILE)
@MustBeDocumented
@OptionalExpectation
public expect annotation class JvmMultifileClass()
/**
* Instructs the Kotlin compiler not to generate getters/setters for this property and expose it as a field.
*
* See the [Kotlin language documentation](https://kotlinlang.org/docs/reference/java-to-kotlin-interop.html#instance-fields)
* for more information.
*/
@Target(FIELD)
@MustBeDocumented
@OptionalExpectation
public expect annotation class JvmField()
/**
* Sets `ACC_SYNTHETIC` flag on the annotated target in the Java bytecode.
*
* Synthetic targets become inaccessible for Java sources at compile time while still being accessible for Kotlin sources.
* Marking target as synthetic is a binary compatible change, already compiled Java code will be able to access such target.
*
* This annotation is intended for *rare cases* when API designer needs to hide Kotlin-specific target from Java API
* while keeping it a part of Kotlin API so the resulting API is idiomatic for both languages.
*/
@Target(FILE, FUNCTION, PROPERTY_GETTER, PROPERTY_SETTER, FIELD)
@OptionalExpectation
public expect annotation class JvmSynthetic()
/**
* Instructs compiler to generate or omit wildcards for type arguments corresponding to parameters with
* declaration-site variance, for example such as `Collection` has.
*
* If the innermost applied `@JvmSuppressWildcards` has `suppress=true`, the type is generated without wildcards.
* If the innermost applied `@JvmSuppressWildcards` has `suppress=false`, the type is generated with wildcards.
*
* It may be helpful only if declaration seems to be inconvenient to use from Java.
*/
@Target(CLASS, FUNCTION, PROPERTY, TYPE)
@MustBeDocumented
@OptionalExpectation
public expect annotation class JvmSuppressWildcards(val suppress: Boolean = true)
/**
* Instructs compiler to generate wildcard for annotated type arguments corresponding to parameters with declaration-site variance.
*
* It may be helpful only if declaration seems to be inconvenient to use from Java without wildcard.
*/
@Target(TYPE)
@MustBeDocumented
@OptionalExpectation
public expect annotation class JvmWildcard()
/**
* Specifies that given value class is inline class.
*
* Adding and removing the annotation is binary incompatible change, since inline classes' methods and functions with inline classes
* in their signature are mangled.
*/
@Target(CLASS)
@MustBeDocumented
@SinceKotlin("1.5")
@OptionalExpectation
public expect annotation class JvmInline()
/**
* Instructs compiler to mark the class as a record and generate relevant toString/equals/hashCode methods
*/
@Target(CLASS)
@MustBeDocumented
@OptionalExpectation
@SinceKotlin("1.5")
public expect annotation class JvmRecord()
/**
* Marks the JVM backing field of the annotated `var` property as `volatile`, meaning that reads and writes to this field
* are atomic and writes are always made visible to other threads. If another thread reads the value of this field (e.g. through its accessor),
* it sees not only that value, but all side effects that led to writing that value.
*
* This annotation has effect only in Kotlin/JVM. It's recommended to use [kotlin.concurrent.Volatile] annotation instead
* in multiplatform projects.
*
* Note that only _backing field_ operations are atomic when the field is annotated with `Volatile`.
* For example, if the property getter or setter make several operations with the backing field,
* a _property_ operation, i.e. reading or setting it through these accessors, is not guaranteed to be atomic.
*/
@Target(FIELD)
@MustBeDocumented
@OptionalExpectation
@Deprecated("Use kotlin.concurrent.Volatile annotation in multiplatform code instead.", ReplaceWith("kotlin.concurrent.Volatile", "kotlin.concurrent.Volatile"))
@DeprecatedSinceKotlin(warningSince = "1.9")
public expect annotation class Volatile()
/**
* Marks the JVM backing field of the annotated property as `transient`, meaning that it is not
* part of the default serialized form of the object.
*/
@Target(FIELD)
@MustBeDocumented
@OptionalExpectation
public expect annotation class Transient()
/**
* Marks the JVM method generated from the annotated function as `strictfp`, meaning that the precision
* of floating point operations performed inside the method needs to be restricted in order to
* achieve better portability.
*/
@Target(FUNCTION, CONSTRUCTOR, PROPERTY_GETTER, PROPERTY_SETTER, CLASS)
@MustBeDocumented
@OptionalExpectation
public expect annotation class Strictfp()
/**
* Marks the JVM method generated from the annotated function as `synchronized`, meaning that the method
* will be protected from concurrent execution by multiple threads by the monitor of the instance (or,
* for static methods, the class) on which the method is defined.
*
* Note that for an extension function, the monitor of the facade class, where it gets compiled to a static method, is used.
* Therefore, this annotation is recommended to be applied only to member functions and properties.
*/
@Target(FUNCTION, PROPERTY_GETTER, PROPERTY_SETTER)
@MustBeDocumented
@OptionalExpectation
@Deprecated("Synchronizing methods on a class instance is not supported on platforms other than JVM. If you need to annotate a common method as JVM-synchronized, introduce your own optional-expectation annotation and actualize it with a typealias to kotlin.jvm.Synchronized.")
@DeprecatedSinceKotlin(warningSince = "1.8")
public expect annotation class Synchronized()
@Target(FILE)
@Retention(AnnotationRetention.SOURCE)
@MustBeDocumented
@SinceKotlin("1.2")
@OptionalExpectation
internal expect annotation class JvmPackageName(val name: String)
/**
* Makes the annotated lambda function implement `java.io.Serializable`,
* generates a pretty `toString` implementation and adds reflection metadata.
*/
@Target(EXPRESSION)
@Retention(AnnotationRetention.SOURCE)
@SinceKotlin("1.8")
@OptionalExpectation
public expect annotation class JvmSerializableLambda()