Scala Compiler2.13.2 < Back
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# Packages

-  package root

  The Scala compiler and reflection APIs.

  The Scala compiler and reflection APIs.

  Definition Classes
    root
-  package scala
  Definition Classes
    root
-  package tools
  Definition Classes
    scala
-  package nsc
  Definition Classes
    tools
-  package transform
  Definition Classes
    nsc
-  abstract class SpecializeTypes extends SubComponent with InfoTransform with TypingTransformers

  Specialize code on types.

  Specialize code on types.

  Make sure you've read the thesis:

  Iulian Dragos: Compiling Scala for Performance (chapter 4)

  There are some things worth noting, (possibly) not mentioned there: 0) Make sure you understand the meaning of various `SpecializedInfo` descriptors defined below.

  1) Specializing traits by introducing bridges in specialized methods of the specialized trait may introduce problems during mixin composition. Concretely, it may cause cyclic calls and result in a stack overflow. See ticket #4351. This was solved by introducing an `Abstract` specialized info descriptor. Instead of generating a bridge in the trait, an abstract method is generated.

  2) Specialized private members sometimes have to be switched to protected. In some cases, even this is not enough. Example:

      class A[@specialized T](protected val d: T) {
        def foo(that: A[T]) = that.d
      }

  Specialization will generate a specialized class and a specialized method:

      class A$mcI$sp(protected val d: Int) extends A[Int] {
        def foo(that: A[Int]) = foo$mcI$sp(that)
        def foo(that: A[Int]) = that.d
      }

  Above, `A$mcI$sp` cannot access `d`, so the method cannot be typechecked.

  Definition Classes
    transform
- Abstract
- Duplicator
- Forward
- Implementation
- ImplementationAdapter
- NormalizedMember
- Overload
- Phase
- SpecialOverload
- SpecialOverride
- SpecialSuperAccessor
- SpecializationDuplicator
- SpecializationPhase
- SpecializationTransformer
- SpecializedAccessor
- SpecializedInfo
- SpecializedInnerClass
- SpecializedSuperConstructorCallArgument
- StdPhase
- TypeEnv
- TypingTransformer
- UnifyError

c

scala.tools.nsc.transform.SpecializeTypes

# ImplementationAdapter

###

#### class ImplementationAdapter extends Global.TreeSymSubstituter

A tree symbol substituter that substitutes on type skolems. If a type parameter is a skolem, it looks for the original symbol in the 'from' and maps it to the corresponding new symbol. The new symbol should probably be a type skolem as well (not enforced).

All private members are made protected in order to be accessible from specialized classes.

Source
  SpecializeTypes.scala

Linear Supertypes
Global.TreeSymSubstituter, Global.InternalTransformer, Global.Transformer, AnyRef, Any
Type Hierarchy

Ordering

1. Alphabetic
2. By Inheritance

Inherited

1. ImplementationAdapter
2. TreeSymSubstituter
3. InternalTransformer
4. Transformer
5. AnyRef
6. Any

Implicitly

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

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2. Show All

Visibility

1. Public
2. Protected

### Instance Constructors

1.  new ImplementationAdapter(from: List[Global.Symbol], to: List[Global.Symbol], targetClass: Global.Symbol, addressFields: Boolean)

### 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 ImplementationAdapter toany2stringadd[ImplementationAdapter] performed by method any2stringadd in scala.Predef.
   Definition Classes
     any2stringadd
4.  def ->[B](y: B): (ImplementationAdapter, B)
   Implicit
     This member is added by an implicit conversion from ImplementationAdapter toArrowAssoc[ImplementationAdapter] performed by method ArrowAssoc in scala.Predef.
   Definition Classes
     ArrowAssoc
   Annotations
     @inline()
5.  final def ==(arg0: Any): Boolean
   Definition Classes
     AnyRef → Any
6.  def apply[T <: Global.Tree](tree: T): T
   Definition Classes
     TreeSymSubstituter
7.  final def asInstanceOf[T0]: T0
   Definition Classes
     Any
8.  def atOwner[A](owner: Global.Symbol)(trans: => A): A
   Definition Classes
     Transformer
9.  def clone(): AnyRef
   Attributes
     protected[lang]
   Definition Classes
     AnyRef
   Annotations
     @throws(classOf[java.lang.CloneNotSupportedException]) @native()
10.  def currentClass: Global.Symbol
    Attributes
      protected
    Definition Classes
      Transformer
11.  def currentMethod: Global.Symbol
    Attributes
      protected
    Definition Classes
      Transformer
12.  var currentOwner: Global.Symbol
    Attributes
      protected[scala]
    Definition Classes
      Transformer
13.  def ensuring(cond: (ImplementationAdapter) => Boolean, msg: => Any): ImplementationAdapter
    Implicit
      This member is added by an implicit conversion from ImplementationAdapter toEnsuring[ImplementationAdapter] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
14.  def ensuring(cond: (ImplementationAdapter) => Boolean): ImplementationAdapter
    Implicit
      This member is added by an implicit conversion from ImplementationAdapter toEnsuring[ImplementationAdapter] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
15.  def ensuring(cond: Boolean, msg: => Any): ImplementationAdapter
    Implicit
      This member is added by an implicit conversion from ImplementationAdapter toEnsuring[ImplementationAdapter] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
16.  def ensuring(cond: Boolean): ImplementationAdapter
    Implicit
      This member is added by an implicit conversion from ImplementationAdapter toEnsuring[ImplementationAdapter] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
17.  final def eq(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
18.  def equals(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef → Any
19.  def finalize(): Unit
    Attributes
      protected[lang]
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.Throwable])
20.  def formatted(fmtstr: String): String
    Implicit
      This member is added by an implicit conversion from ImplementationAdapter toStringFormat[ImplementationAdapter] performed by method StringFormat in scala.Predef.
    Definition Classes
      StringFormat
    Annotations
      @inline()
21.  final def getClass(): Class[_ <: AnyRef]
    Definition Classes
      AnyRef → Any
    Annotations
      @native()
22.  def hashCode(): Int
    Definition Classes
      AnyRef → Any
    Annotations
      @native()
23.  final def isInstanceOf[T0]: Boolean
    Definition Classes
      Any
24.  final def ne(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
25.  final def notify(): Unit
    Definition Classes
      AnyRef
    Annotations
      @native()
26.  final def notifyAll(): Unit
    Definition Classes
      AnyRef
    Annotations
      @native()
27.  val symSubst: Global.SubstSymMap
    Definition Classes
      ImplementationAdapter → TreeSymSubstituter
28.  final def synchronized[T0](arg0: => T0): T0
    Definition Classes
      AnyRef
29.  def toString(): String
    Definition Classes
      TreeSymSubstituter → AnyRef → Any
30.  def transform(tree: Global.Tree): Global.Tree

    All private members that are referenced are made protected, in order to be accessible from specialized subclasses.

    All private members that are referenced are made protected, in order to be accessible from specialized subclasses.

    Definition Classes
      ImplementationAdapter → TreeSymSubstituter → InternalTransformer → Transformer
31.  def transformCaseDefs(trees: List[Global.CaseDef]): List[Global.CaseDef]
    Definition Classes
      Transformer
32.  def transformIdents(trees: List[Global.Ident]): List[Global.Ident]
    Definition Classes
      Transformer
33.  def transformMemberDefs(trees: List[Global.MemberDef]): List[Global.MemberDef]
    Definition Classes
      Transformer
34.  def transformModifiers(mods: Global.Modifiers): Global.Modifiers
    Definition Classes
      Transformer
35.  def transformStats(stats: List[Global.Tree], exprOwner: Global.Symbol): List[Global.Tree]
    Definition Classes
      Transformer
36.  def transformTemplate(tree: Global.Template): Global.Template
    Definition Classes
      Transformer
37.  def transformTrees(trees: List[Global.Tree]): List[Global.Tree]
    Definition Classes
      Transformer
38.  def transformTypeDefs(trees: List[Global.TypeDef]): List[Global.TypeDef]
    Definition Classes
      Transformer
39.  def transformValDef(tree: Global.ValDef): Global.ValDef
    Definition Classes
      Transformer
40.  def transformValDefs(trees: List[Global.ValDef]): List[Global.ValDef]
    Definition Classes
      Transformer
41.  def transformValDefss(treess: List[List[Global.ValDef]]): List[List[Global.ValDef]]
    Definition Classes
      Transformer
42.  val treeCopy: Global.TreeCopier
    Definition Classes
      Transformer
43.  final def wait(): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException])
44.  final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException])
45.  final def wait(arg0: Long): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException]) @native()

### Deprecated Value Members

1.  def →[B](y: B): (ImplementationAdapter, B)
   Implicit
     This member is added by an implicit conversion from ImplementationAdapter toArrowAssoc[ImplementationAdapter] performed by method ArrowAssoc in scala.Predef.
   Definition Classes
     ArrowAssoc
   Annotations
     @deprecated
   Deprecated

     (Since version 2.13.0) Use `->` instead. If you still wish to display it as one character, consider using a font with programming ligatures such as Fira Code.

### Inherited from Global.TreeSymSubstituter

### Inherited from Global.InternalTransformer

### Inherited from Global.Transformer

### Inherited from AnyRef

### Inherited from Any

### Inherited by implicit conversion any2stringadd fromImplementationAdapter to any2stringadd[ImplementationAdapter]

### Inherited by implicit conversion StringFormat fromImplementationAdapter to StringFormat[ImplementationAdapter]

### Inherited by implicit conversion Ensuring fromImplementationAdapter to Ensuring[ImplementationAdapter]

### Inherited by implicit conversion ArrowAssoc fromImplementationAdapter to ArrowAssoc[ImplementationAdapter]

### Ungrouped