Packages

  • package root
    Definition Classes
    root
  • package scala
    Definition Classes
    root
  • package reflect
    Definition Classes
    scala
  • package api

    EXPERIMENTAL

    EXPERIMENTAL

    The Scala Reflection API (located in scala-reflect.jar).

    In Scala 2.10.0, the Scala Reflection API and its implementation have an "experimental" status. This means that the API and the docs are not complete and can be changed in binary- and source-incompatible manner in 2.10.1. This also means that the implementation has some known issues.

    The following types are the backbone of the Scala Reflection API, and serve as a good starting point for information about Scala Reflection:

    For more information about Scala Reflection, see the Reflection Guide

    Definition Classes
    reflect
  • trait Annotations extends AnyRef

    EXPERIMENTAL

    EXPERIMENTAL

    This trait provides annotation support for the reflection API.

    In Scala, annotations belong to one of the two categories:

    • Java annotations: annotations on definitions produced by the Java compiler, i.e., subtypes of java.lang.annotation.Annotation attached to program definitions. When read by Scala reflection, the scala.annotation.ClassfileAnnotation trait is automatically added as a superclass to every Java annotation type.
    • Scala annotations: annotations on definitions or types produced by the Scala compiler.

    When a Scala annotation that inherits from scala.annotation.StaticAnnotation or scala.annotation.ClassfileAnnotation is compiled, it is stored as special attributes in the corresponding classfile, and not as a Java annotation. Note that subclassing just scala.annotation.Annotation is not enough to have the corresponding metadata persisted for runtime reflection.

    Both Java and Scala annotations are represented as typed trees carrying constructor invocations corresponding to the annotation. For instance, the annotation in @ann(1, 2) class C is represented as q"@new ann(1, 2)".

    Unlike Java reflection, Scala reflection does not support evaluation of constructor invocations stored in annotations into underlying objects. For instance it's impossible to go from @ann(1, 2) class C to ann(1, 2), so one has to analyze trees representing annotation arguments to manually extract corresponding values. Towards that end, arguments of an annotation can be obtained via annotation.tree.children.tail.

    For more information about Annotations, see the Reflection Guide: Annotations, Names, Scopes, and More

    Definition Classes
    api
  • Annotation
  • AnnotationApi
  • AnnotationExtractor
  • ArrayArgument
  • ArrayArgumentApi
  • ArrayArgumentExtractor
  • JavaArgument
  • JavaArgumentApi
  • LiteralArgument
  • LiteralArgumentApi
  • LiteralArgumentExtractor
  • NestedArgument
  • NestedArgumentApi
  • NestedArgumentExtractor

abstract type LiteralArgument >: Null <: Universe.LiteralArgumentApi with Universe.JavaArgument

A literal argument to a Java annotation as "use X instead" in @Deprecated("use X instead")

Annotations
@deprecated
Deprecated

(Since version 2.11.0) use Annotation.tree to inspect annotation arguments

Source
Annotations.scala
Linear Supertypes
Universe.<refinement>, Universe.JavaArgumentApi, Universe.LiteralArgumentApi, AnyRef, Any
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. LiteralArgument
  2. <refinement>
  3. JavaArgumentApi
  4. LiteralArgumentApi
  5. AnyRef
  6. Any
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Visibility
  1. Public
  2. All

Abstract Value Members

  1. abstract def value: Universe.Constant

    The underlying compile-time constant value.

    The underlying compile-time constant value.

    Definition Classes
    LiteralArgumentApi
    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) use Annotation.tree to inspect annotation arguments

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  7. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  8. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  9. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  10. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  11. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  12. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  13. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  14. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  15. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  16. def toString(): String
    Definition Classes
    AnyRef → Any
  17. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  18. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  19. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()

Inherited from Universe.<refinement>

Inherited from Universe.JavaArgumentApi

Inherited from Universe.LiteralArgumentApi

Inherited from AnyRef

Inherited from Any

Ungrouped