Packages

t

scala.tools.nsc.transform

InfoTransform

trait InfoTransform extends SubComponent with Transform

An InfoTransform contains a compiler phase that transforms trees and symbol infos -- making sure they stay consistent. The symbol info is transformed assuming it is consistent right before this phase. The info transformation is triggered by Symbol::rawInfo, which caches the results in the symbol's type history. This way sym.info (during an enteringPhase(p)) can look up what the symbol's info should look like at the beginning of phase p. (If the transformed info had not been stored yet, rawInfo will compute the info by composing the info-transformers of the most recent phase before p, up to the transformer of the phase right before p.)

Concretely, enteringPhase(p) { sym.info } yields the info *before* phase p has transformed it. Imagine you're a phase and it all makes sense.

Source
InfoTransform.scala
Linear Supertypes
Transform, SubComponent, AnyRef, Any
Known Subclasses
erasure, explicitOuter, fields, flatten, lambdaLift, postErasure, specializeTypes, uncurry, Erasure, ExplicitOuter, Fields, Flatten, LambdaLift, PostErasure, SpecializeTypes, UnCurry
Type Hierarchy
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. InfoTransform
  2. Transform
  3. SubComponent
  4. AnyRef
  5. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Visibility
  1. Public
  2. Protected

Type Members

  1. abstract class StdPhase extends GlobalPhase

    A standard phase template

    A standard phase template

    Definition Classes
    SubComponent
  2. final type InfoPhase = Phase
    Annotations
    @nowarn()

Deprecated Type Members

  1. class Phase extends InfoTransform.Phase
    Annotations
    @nowarn() @deprecated
    Deprecated

    (Since version 2.13.4) use InfoPhase instead

Abstract Value Members

  1. abstract val global: Global

    The global environment; overridden by instantiation in Global.

    The global environment; overridden by instantiation in Global.

    Definition Classes
    SubComponent
  2. abstract val phaseName: String

    The name of the phase

    The name of the phase

    Definition Classes
    SubComponent
  3. abstract val runsAfter: List[String]

    Names of phases that must run before this phase.

    Names of phases that must run before this phase.

    Definition Classes
    SubComponent
  4. abstract val runsRightAfter: Option[String]

    Name of the phase that this phase must follow immediately.

    Name of the phase that this phase must follow immediately.

    Definition Classes
    SubComponent
  5. abstract def transformInfo(sym: Global.Symbol, tpe: Global.Type): Global.Type

Concrete Value Members

  1. final def afterOwnPhase[T](op: => T): T
    Definition Classes
    SubComponent
    Annotations
    @inline()
  2. final def beforeOwnPhase[T](op: => T): T
    Definition Classes
    SubComponent
    Annotations
    @inline()
  3. def enabled: Boolean

    Is this component enabled? Default is true.

    Is this component enabled? Default is true.

    Definition Classes
    SubComponent
  4. def equals(other: Any): Boolean
    Definition Classes
    SubComponent → AnyRef → Any
  5. def hashCode(): Int

    SubComponents are added to a HashSet and two phases are the same if they have the same name.

    SubComponents are added to a HashSet and two phases are the same if they have the same name.

    Definition Classes
    SubComponent → AnyRef → Any
  6. val initial: Boolean

    True if this phase runs before all other phases.

    True if this phase runs before all other phases. Usually, parser.

    Definition Classes
    SubComponent
  7. val internal: Boolean

    True if this phase is not provided by a plug-in.

    True if this phase is not provided by a plug-in.

    Definition Classes
    SubComponent
  8. def newPhase(prev: nsc.Phase): StdPhase

    Create a new phase which applies transformer

    Create a new phase which applies transformer

    Definition Classes
    InfoTransform → Transform → SubComponent
  9. def ownPhase: nsc.Phase

    The phase corresponding to this subcomponent in the current compiler run.

    The phase corresponding to this subcomponent in the current compiler run.

    Definition Classes
    SubComponent
  10. def phaseNewFlags: Long

    New flags defined by the phase which are not valid before

    New flags defined by the phase which are not valid before

    Definition Classes
    SubComponent
  11. def phaseNextFlags: Long

    New flags defined by the phase which are not valid until immediately after it

    New flags defined by the phase which are not valid until immediately after it

    Definition Classes
    SubComponent
  12. val requires: List[String]

    Names of phases required by this component.

    Names of phases required by this component. Default is Nil.

    Definition Classes
    SubComponent
  13. val runsBefore: List[String]

    Names of phases that must run after this phase.

    Names of phases that must run after this phase. Default is Nil.

    Definition Classes
    SubComponent
  14. val terminal: Boolean

    True if this phase runs after all other phases.

    True if this phase runs after all other phases. Usually, terminal.

    Definition Classes
    SubComponent