Scala Compiler 2.13.16 - scala.tools.nsc.typechecker.StdAttachments.OriginalTreeAttachment
Keywords: Scala Compiler 2.13.16 scala.tools.nsc.typechecker.StdAttachments.OriginalTreeAttachment

Scala Compiler2.13.16 < 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 typechecker
  Definition Classes
    nsc
-  trait StdAttachments extends AnyRef
  Definition Classes
    typechecker
- DynamicRewriteAttachment
- MacroExpanderAttachment
- MacroExpansionAttachment
- MacroImplRefAttachment
- MacroRuntimeAttachment
- OriginalTreeAttachment
- SuperArgsAttachment
- SuppressMacroExpansionAttachment

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scala.tools.nsc.typechecker.StdAttachments

# OriginalTreeAttachment

###

#### case class OriginalTreeAttachment(original: Global.Tree) extends Product with Serializable

Marks a tree that has been adapted by typer and sets the original tree that was in place before.

Keeping track of the original trees were is an important feature for some compiler plugins (like Scalameta) and the incremental compiler (Zinc). In both cases, adapting trees loses information in some sense and do not allow external tools to capture some information stored in user-defined trees that are optimized away by early phases (mostly, typer).

See how the absence of this attachment blocks Zinc: https://github.com/sbt/zinc/issues/227. Related: https://github.com/scala/scala-dev/issues/340.

This attachment is, at the moment, only used to keep track of constant-folded constants. It has a generic wording in the hope that in the future can be reused in the same context to keep track of other adapted trees.

Source
  StdAttachments.scala

Linear Supertypes
java.io.Serializable, Product, Equals, AnyRef, Any
Type Hierarchy
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Ordering

1. Alphabetic
2. By Inheritance

Inherited

1. OriginalTreeAttachment
2. Serializable
3. Product
4. Equals
5. AnyRef
6. Any

Implicitly

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

1. Hide All
2. Show All

Visibility

1. Public
2. Protected

### Instance Constructors

1.  new OriginalTreeAttachment(original: Global.Tree)

### 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 Analyzer.OriginalTreeAttachment toany2stringadd[Analyzer.OriginalTreeAttachment] performed by method any2stringadd in scala.Predef.
   Definition Classes
     any2stringadd
4.  def ->[B](y: B): (Analyzer.OriginalTreeAttachment, B)
   Implicit
     This member is added by an implicit conversion from Analyzer.OriginalTreeAttachment toArrowAssoc[Analyzer.OriginalTreeAttachment] 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(classOf[java.lang.CloneNotSupportedException]) @native()
8.  def ensuring(cond: (Analyzer.OriginalTreeAttachment) => Boolean, msg: => Any): Analyzer.OriginalTreeAttachment
   Implicit
     This member is added by an implicit conversion from Analyzer.OriginalTreeAttachment toEnsuring[Analyzer.OriginalTreeAttachment] performed by method Ensuring in scala.Predef.
   Definition Classes
     Ensuring
9.  def ensuring(cond: (Analyzer.OriginalTreeAttachment) => Boolean): Analyzer.OriginalTreeAttachment
   Implicit
     This member is added by an implicit conversion from Analyzer.OriginalTreeAttachment toEnsuring[Analyzer.OriginalTreeAttachment] performed by method Ensuring in scala.Predef.
   Definition Classes
     Ensuring
10.  def ensuring(cond: Boolean, msg: => Any): Analyzer.OriginalTreeAttachment
    Implicit
      This member is added by an implicit conversion from Analyzer.OriginalTreeAttachment toEnsuring[Analyzer.OriginalTreeAttachment] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
11.  def ensuring(cond: Boolean): Analyzer.OriginalTreeAttachment
    Implicit
      This member is added by an implicit conversion from Analyzer.OriginalTreeAttachment toEnsuring[Analyzer.OriginalTreeAttachment] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
12.  final def eq(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
13.  def finalize(): Unit
    Attributes
      protected[lang]
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.Throwable])
14.  final def getClass(): Class[_ <: AnyRef]
    Definition Classes
      AnyRef → Any
    Annotations
      @native()
15.  final def isInstanceOf[T0]: Boolean
    Definition Classes
      Any
16.  final def ne(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
17.  final def notify(): Unit
    Definition Classes
      AnyRef
    Annotations
      @native()
18.  final def notifyAll(): Unit
    Definition Classes
      AnyRef
    Annotations
      @native()
19.  val original: Global.Tree
20.  def productElementNames: Iterator[String]
    Definition Classes
      Product
21.  final def synchronized[T0](arg0: => T0): T0
    Definition Classes
      AnyRef
22.  final def wait(): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException])
23.  final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException])
24.  final def wait(arg0: Long): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException]) @native()

### Deprecated Value Members

1.  def formatted(fmtstr: String): String
   Implicit
     This member is added by an implicit conversion from Analyzer.OriginalTreeAttachment toStringFormat[Analyzer.OriginalTreeAttachment] 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.

2.  def →[B](y: B): (Analyzer.OriginalTreeAttachment, B)
   Implicit
     This member is added by an implicit conversion from Analyzer.OriginalTreeAttachment toArrowAssoc[Analyzer.OriginalTreeAttachment] 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 java.io.Serializable

### Inherited from Product

### Inherited from Equals

### Inherited from AnyRef

### Inherited from Any

### Inherited by implicit conversion any2stringadd fromAnalyzer.OriginalTreeAttachment to any2stringadd[Analyzer.OriginalTreeAttachment]

### Inherited by implicit conversion StringFormat fromAnalyzer.OriginalTreeAttachment to StringFormat[Analyzer.OriginalTreeAttachment]

### Inherited by implicit conversion Ensuring fromAnalyzer.OriginalTreeAttachment to Ensuring[Analyzer.OriginalTreeAttachment]

### Inherited by implicit conversion ArrowAssoc fromAnalyzer.OriginalTreeAttachment to ArrowAssoc[Analyzer.OriginalTreeAttachment]

### Ungrouped