Scala Reflection Library2.12.17 < Back
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# 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:

  - scala.reflect.api.Symbols
  - scala.reflect.api.Types
  - scala.reflect.api.Mirrors
  - scala.reflect.api.Universe

  For more information about Scala Reflection, see the Reflection Guide

  Definition Classes
    reflect
-  trait Internals extends AnyRef

  EXPERIMENTAL

  EXPERIMENTAL

  This trait assembles APIs occasionally necessary for performing low-level operations on reflection artifacts. See Internals#InternalApi for more information about nature, usefulness and compatibility guarantees of these APIs.

  Definition Classes
    api
-  trait InternalApi extends AnyRef

  Reflection API exhibits a tension inherent to experimental things: on the one hand we want it to grow into a beautiful and robust API, but on the other hand we have to deal with immaturity of underlying mechanisms by providing not very pretty solutions to enable important use cases.

  Reflection API exhibits a tension inherent to experimental things: on the one hand we want it to grow into a beautiful and robust API, but on the other hand we have to deal with immaturity of underlying mechanisms by providing not very pretty solutions to enable important use cases.

  In Scala 2.10, which was our first stab at reflection API, we didn't have a systematic approach to dealing with this tension, sometimes exposing too much of internals (e.g. Symbol.deSkolemize) and sometimes exposing too little (e.g. there's still no facility to change owners, to do typing transformations, etc). This resulted in certain confusion with some internal APIs living among public ones, scaring the newcomers, and some internal APIs only available via casting, which requires intimate knowledge of the compiler and breaks compatibility guarantees.

  This led to creation of the `internal` API module for the reflection API, which provides advanced APIs necessary for macros that push boundaries of the state of the art, clearly demarcating them from the more or less straightforward rest and providing compatibility guarantees on par with the rest of the reflection API (full compatibility within minor releases, best effort towards backward compatibility within major releases, clear replacement path in case of rare incompatible changes in major releases).

  The `internal` module itself (the value that implements InternalApi) isn't defined here, in scala.reflect.api.Universe, but is provided on per-implementation basis. Runtime API endpoint (scala.reflect.runtime.universe) provides `universe.compat: InternalApi`, whereas compile-time API endpoints (instances of scala.reflect.macros.Context) provide `c.compat: ContextInternalApi`, which extends `InternalApi` with additional universe-specific and context-specific functionality.

  Definition Classes
    Internals
- DecoratorApi
- Decorators

t

scala.reflect.api.Internals.InternalApi

# DecoratorApi 

###

#### trait DecoratorApi extends AnyRef

Source
  Internals.scala
See also

  Decorators

Linear Supertypes
AnyRef, Any
Known Subclasses
MacroDecoratorApi
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Ordering

1. Alphabetic
2. By Inheritance

Inherited

1. DecoratorApi
2. AnyRef
3. Any

Implicitly

1. by any2stringadd
2. by StringFormat
3. by Ensuring
4. by ArrowAssoc

1. Hide All
2. Show All

Visibility

1. Public
2. All

### Type Members

1.  abstract type SymbolDecorator[T <: Universe.Symbol] <: SymbolDecoratorApi[T]

   Extension methods for symbols

2.  class SymbolDecoratorApi[T <: Universe.Symbol] extends AnyRef

   See also

     SymbolDecorator

3.  abstract type TreeDecorator[T <: Universe.Tree] <: TreeDecoratorApi[T]

   Extension methods for trees

4.  class TreeDecoratorApi[T <: Universe.Tree] extends AnyRef

   See also

     TreeDecorator

5.  abstract type TypeDecorator[T <: Universe.Type] <: TypeDecoratorApi[T]

   Extension methods for types

6.  implicit class TypeDecoratorApi[T <: Universe.Type] extends AnyRef

   See also

     TypeDecorator

### Abstract Value Members

1.  implicit abstract def symbolDecorator[T <: Universe.Symbol](symbol: T): SymbolDecorator[T]

   See also

     SymbolDecorator

2.  implicit abstract def treeDecorator[T <: Universe.Tree](tree: T): TreeDecorator[T]

   See also

     TreeDecorator

3.  implicit abstract def typeDecorator[T <: Universe.Type](tp: T): TypeDecorator[T]

   See also

     TypeDecorator

### Concrete Value Members

1.  final def !=(arg0: Any): Boolean
   Definition Classes
     AnyRef → Any
2.  final def ##(): Int
   Definition Classes
     AnyRef → Any
3.  def +(other: String): String
   Implicit
     This member is added by an implicit conversion from DecoratorApi to any2stringadd[DecoratorApi] performed by method any2stringadd in scala.Predef.
   Definition Classes
     any2stringadd
4.  def ->[B](y: B): (DecoratorApi, B)
   Implicit
     This member is added by an implicit conversion from DecoratorApi to ArrowAssoc[DecoratorApi] performed by method ArrowAssoc in scala.Predef.
   Definition Classes
     ArrowAssoc
   Annotations
     @inline()
5.  final def ==(arg0: Any): Boolean
   Definition Classes
     AnyRef → Any
6.  final def asInstanceOf[T0]: T0
   Definition Classes
     Any
7.  def clone(): AnyRef
   Attributes
     protected[lang]
   Definition Classes
     AnyRef
   Annotations
     @throws( ... ) @native()
8.  def ensuring(cond: (DecoratorApi) ⇒ Boolean, msg: ⇒ Any): DecoratorApi
   Implicit
     This member is added by an implicit conversion from DecoratorApi to Ensuring[DecoratorApi] performed by method Ensuring in scala.Predef.
   Definition Classes
     Ensuring
9.  def ensuring(cond: (DecoratorApi) ⇒ Boolean): DecoratorApi
   Implicit
     This member is added by an implicit conversion from DecoratorApi to Ensuring[DecoratorApi] performed by method Ensuring in scala.Predef.
   Definition Classes
     Ensuring
10.  def ensuring(cond: Boolean, msg: ⇒ Any): DecoratorApi
    Implicit
      This member is added by an implicit conversion from DecoratorApi to Ensuring[DecoratorApi] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
11.  def ensuring(cond: Boolean): DecoratorApi
    Implicit
      This member is added by an implicit conversion from DecoratorApi to Ensuring[DecoratorApi] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
12.  final def eq(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
13.  def equals(arg0: Any): Boolean
    Definition Classes
      AnyRef → Any
14.  def finalize(): Unit
    Attributes
      protected[lang]
    Definition Classes
      AnyRef
    Annotations
      @throws( classOf[java.lang.Throwable] )
15.  final def getClass(): Class[_]
    Definition Classes
      AnyRef → Any
    Annotations
      @native()
16.  def hashCode(): Int
    Definition Classes
      AnyRef → Any
    Annotations
      @native()
17.  final def isInstanceOf[T0]: Boolean
    Definition Classes
      Any
18.  final def ne(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
19.  final def notify(): Unit
    Definition Classes
      AnyRef
    Annotations
      @native()
20.  final def notifyAll(): Unit
    Definition Classes
      AnyRef
    Annotations
      @native()
21.  final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
      AnyRef
22.  def toString(): String
    Definition Classes
      AnyRef → Any
23.  final def wait(): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )
24.  final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )
25.  final def wait(arg0: Long): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... ) @native()
26.  def →[B](y: B): (DecoratorApi, B)
    Implicit
      This member is added by an implicit conversion from DecoratorApi to ArrowAssoc[DecoratorApi] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
      ArrowAssoc

### Deprecated Value Members

1.  def formatted(fmtstr: String): String
   Implicit
     This member is added by an implicit conversion from DecoratorApi to StringFormat[DecoratorApi] performed by method StringFormat in scala.Predef.
   Definition Classes
     StringFormat
   Annotations
     @deprecated @inline()
   Deprecated

     (Since version 2.12.16) Use `formatString.format(value)` instead of `value.formatted(formatString)`, or use the `f""` string interpolator. In Java 15 and later, `formatted` resolves to the new method in String which has reversed parameters.

### Inherited from AnyRef

### Inherited from Any

### Inherited by implicit conversion any2stringadd from DecoratorApi to any2stringadd[DecoratorApi]

### Inherited by implicit conversion StringFormat from DecoratorApi to StringFormat[DecoratorApi]

### Inherited by implicit conversion Ensuring from DecoratorApi to Ensuring[DecoratorApi]

### Inherited by implicit conversion ArrowAssoc from DecoratorApi to ArrowAssoc[DecoratorApi]

### Ungrouped