Scala Compiler2.12.0 < Back
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# Packages

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  The Scala compiler API.

  The Scala compiler API.

  The following resources are useful for Scala plugin/compiler development:

  - Scala development tutorials on www.scala-lang.org
  - Scala Internals wiki
  - Scala compiler corner, maintained by Miguel
  Definition Classes
    root
-  package scala
  Definition Classes
    root
-  package tools
  Definition Classes
    scala
-  package nsc
  Definition Classes
    tools
-  package typechecker
  Definition Classes
    nsc
- Adaptations
- Analyzer
- AnalyzerPlugins
- Checkable
- ConstantFolder
- ContextErrors
- ContextMode
- Contexts
- DestructureTypes
- Duplicators
- EtaExpansion
- Fingerprint
- Implicits
- ImplicitsStats
- Infer
- Macros
- MacrosStats
- MethodSynthesis
- Namers
- NamesDefaults
- PatternTypers
- RefChecks
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- Unapplies

t

scala.tools.nsc.typechecker

# EtaExpansion 

###

#### trait EtaExpansion extends AnyRef

This trait ...

Self Type
  Analyzer
Source
  EtaExpansion.scala
Version

  1.0

Linear Supertypes
AnyRef, Any
Known Subclasses
erasure, treeChecker, Erasure, Duplicator, SpecializationDuplicator, Analyzer, Duplicators, TreeCheckers
Type Hierarchy
 
Ordering

1. Alphabetic
2. By Inheritance

Inherited

1. EtaExpansion
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

### 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 EtaExpansion to any2stringadd[EtaExpansion] performed by method any2stringadd in scala.Predef.
   Definition Classes
     any2stringadd
4.  def ->[B](y: B): (EtaExpansion, B)
   Implicit
     This member is added by an implicit conversion from EtaExpansion to ArrowAssoc[EtaExpansion] 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[java.lang]
   Definition Classes
     AnyRef
   Annotations
     @throws( ... )
8.  def ensuring(cond: (EtaExpansion) ⇒ Boolean, msg: ⇒ Any): EtaExpansion
   Implicit
     This member is added by an implicit conversion from EtaExpansion to Ensuring[EtaExpansion] performed by method Ensuring in scala.Predef.
   Definition Classes
     Ensuring
9.  def ensuring(cond: (EtaExpansion) ⇒ Boolean): EtaExpansion
   Implicit
     This member is added by an implicit conversion from EtaExpansion to Ensuring[EtaExpansion] performed by method Ensuring in scala.Predef.
   Definition Classes
     Ensuring
10.  def ensuring(cond: Boolean, msg: ⇒ Any): EtaExpansion
    Implicit
      This member is added by an implicit conversion from EtaExpansion to Ensuring[EtaExpansion] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
11.  def ensuring(cond: Boolean): EtaExpansion
    Implicit
      This member is added by an implicit conversion from EtaExpansion to Ensuring[EtaExpansion] 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 etaExpand(unit: Global.CompilationUnit, tree: Global.Tree, typer: Analyzer.Typer): Global.Tree

    Expand partial method application `p.f(es_1)...(es_n)`.

    Expand partial method application `p.f(es_1)...(es_n)`.

    We expand this to the following block, which evaluates the target of the application and its supplied arguments if needed (they are not stable), and then wraps a Function that abstracts over the missing arguments.

    ```{ private synthetic val eta$f = p.f // if p is not stable ... private synthetic val eta$e_i = e_i // if e_i is not stable ... (ps_1 => ... => ps_m => eta$f([es_1])...([es_m])(ps_1)...(ps_m)) } `````````

    This is called from instantiateToMethodType after type checking `tree`, and we realize we have a method type, where a function type (builtin or SAM) is expected.

15.  def finalize(): Unit
    Attributes
      protected[java.lang]
    Definition Classes
      AnyRef
    Annotations
      @throws( classOf[java.lang.Throwable] )
16.  def formatted(fmtstr: String): String
    Implicit
      This member is added by an implicit conversion from EtaExpansion to StringFormat[EtaExpansion] performed by method StringFormat in scala.Predef.
    Definition Classes
      StringFormat
    Annotations
      @inline()
17.  final def getClass(): Class[_]
    Definition Classes
      AnyRef → Any
18.  def hashCode(): Int
    Definition Classes
      AnyRef → Any
19.  final def isInstanceOf[T0]: Boolean
    Definition Classes
      Any
20.  final def ne(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
21.  final def notify(): Unit
    Definition Classes
      AnyRef
22.  final def notifyAll(): Unit
    Definition Classes
      AnyRef
23.  final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
      AnyRef
24.  def toString(): String
    Definition Classes
      AnyRef → Any
25.  final def wait(): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )
26.  final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )
27.  final def wait(arg0: Long): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )
28.  def →[B](y: B): (EtaExpansion, B)
    Implicit
      This member is added by an implicit conversion from EtaExpansion to ArrowAssoc[EtaExpansion] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
      ArrowAssoc

### Inherited from AnyRef

### Inherited from Any

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

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

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

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

### Ungrouped