c

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.

Linear Supertypes
Serializable, java.io.Serializable, Product, Equals, AnyRef, Any
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Inherited
  1. OriginalTreeAttachment
  2. Serializable
  3. Serializable
  4. Product
  5. Equals
  6. AnyRef
  7. Any
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Visibility
  1. Public
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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. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  7. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  8. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  9. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  10. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  11. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  12. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  13. val original: Global.Tree
  14. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  15. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  16. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  17. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )

Inherited from Serializable

Inherited from java.io.Serializable

Inherited from Product

Inherited from Equals

Inherited from AnyRef

Inherited from Any

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