scala.tools.nsc.typechecker

# RefChecks

#### abstract class RefChecks extends SubComponent with InfoTransform with reflect.internal.transform.RefChecks

Post-attribution checking and transformation.

This phase performs the following checks.

- All overrides conform to rules.
- All type arguments conform to bounds.
- All type variable uses conform to variance annotations.
- No forward reference to a term symbol extends beyond a value definition.

It performs the following transformations.

- Local modules are replaced by variables and classes
- Calls to case factory methods are replaced by new's.
- Eliminate branches in a conditional if the condition is a constant

Source
  RefChecks.scala
Version

  1.0

To do

  Check whether we always check type parameter bounds.

Linear Supertypes
reflect.internal.transform.RefChecks, InfoTransform, Transform, SubComponent, AnyRef, Any
Known Subclasses
refChecks
Type Hierarchy Learn more about scaladoc diagrams
Ordering

1. Alphabetic
2. By inheritance

Inherited

1. RefChecks
2. RefChecks
3. InfoTransform
4. Transform
5. SubComponent
6. AnyRef
7. Any

Implicitly

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

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Visibility

1. Public
2. All

### Instance Constructors

1. #### new RefChecks()

### Type Members

1. #### class Phase extends InfoTransform.Phase

   Definition Classes
     InfoTransform

2. #### class RefCheckTransformer extends Global.Transformer

3. #### abstract class StdPhase extends GlobalPhase

   A standard phase template

   A standard phase template

   Definition Classes
     SubComponent

### 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
     RefChecks → RefChecks → SubComponent

2. #### 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

3. #### 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

### Concrete 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 information
     This member is added by an implicit conversion from RefChecks to any2stringadd[RefChecks] performed by method any2stringadd in scala.Predef.
   Definition Classes
     any2stringadd

4. #### def ->[B](y: B): (RefChecks, B)

   Implicit information
     This member is added by an implicit conversion from RefChecks to ArrowAssoc[RefChecks] performed by method ArrowAssoc in scala.Predef.
   Definition Classes
     ArrowAssoc
   Annotations
     @inline()

5. #### final def ==(arg0: Any): Boolean

   Definition Classes
     AnyRef → Any

6. #### def accessFlagsToString(sym: Global.Symbol): String

7. #### final def afterOwnPhase[T](op: ⇒ T): T

   Definition Classes
     SubComponent
   Annotations
     @inline()

8. #### final def asInstanceOf[T0]: T0

   Definition Classes
     Any

9. #### final def beforeOwnPhase[T](op: ⇒ T): T

   Definition Classes
     SubComponent
   Annotations
     @inline()

10. #### def changesBaseClasses: Boolean

    Definition Classes
      RefChecks → InfoTransform

11. #### def clone(): AnyRef

    Attributes
      protected[java.lang]
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

12. #### def enabled: Boolean

    Is this component enabled? Default is true.

    Is this component enabled? Default is true.

    Definition Classes
      SubComponent

13. #### def ensuring(cond: (RefChecks) ⇒ Boolean, msg: ⇒ Any): RefChecks

    Implicit information
      This member is added by an implicit conversion from RefChecks to Ensuring[RefChecks] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring

14. #### def ensuring(cond: (RefChecks) ⇒ Boolean): RefChecks

    Implicit information
      This member is added by an implicit conversion from RefChecks to Ensuring[RefChecks] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring

15. #### def ensuring(cond: Boolean, msg: ⇒ Any): RefChecks

    Implicit information
      This member is added by an implicit conversion from RefChecks to Ensuring[RefChecks] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring

16. #### def ensuring(cond: Boolean): RefChecks

    Implicit information
      This member is added by an implicit conversion from RefChecks to Ensuring[RefChecks] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring

17. #### final def eq(arg0: AnyRef): Boolean

    Definition Classes
      AnyRef

18. #### def equals(arg0: Any): Boolean

    Definition Classes
      AnyRef → Any

19. #### def finalize(): Unit

    Attributes
      protected[java.lang]
    Definition Classes
      AnyRef
    Annotations
      @throws( classOf[java.lang.Throwable] )

20. #### def formatted(fmtstr: String): String

    Implicit information
      This member is added by an implicit conversion from RefChecks to StringFormat[RefChecks] performed by method StringFormat in scala.Predef.
    Definition Classes
      StringFormat
    Annotations
      @inline()

21. #### final def getClass(): Class[_]

    Definition Classes
      AnyRef → Any

22. #### def hashCode(): Int

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

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

    Definition Classes
      SubComponent → AnyRef → Any

23. #### 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

24. #### 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

25. #### final def isInstanceOf[T0]: Boolean

    Definition Classes
      Any

26. #### def keepsTypeParams: Boolean

    Attributes
      protected
    Definition Classes
      InfoTransform

27. #### final def ne(arg0: AnyRef): Boolean

    Definition Classes
      AnyRef

28. #### 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

29. #### def newTransformer(unit: Global.CompilationUnit): RefCheckTransformer

    The transformer factory

    The transformer factory

    Definition Classes
      RefChecks → Transform

30. #### final def notify(): Unit

    Definition Classes
      AnyRef

31. #### final def notifyAll(): Unit

    Definition Classes
      AnyRef

32. #### def overridesTypeInPrefix(tp1: Global.Type, tp2: Global.Type, prefix: Global.Type): Boolean

33. #### 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

34. #### val phaseName: String

    the following two members override abstract members in Transform

    the following two members override abstract members in Transform

    Definition Classes
      RefChecks → SubComponent

35. #### 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
      RefChecks → SubComponent

36. #### 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

37. #### val requires: List[String]

    Names of phases required by this component.

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

    Definition Classes
      SubComponent

38. #### 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

39. #### final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
      AnyRef

40. #### 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

41. #### val toJavaRepeatedParam: Global.SubstSymMap

42. #### val toScalaRepeatedParam: Global.SubstSymMap

43. #### def toString(): String

    Definition Classes
      AnyRef → Any

44. #### def transformInfo(sym: Global.Symbol, tp: Global.Type): Global.Type

    Definition Classes
      RefChecks → RefChecks → InfoTransform

45. #### final def wait(): Unit

    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

46. #### final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

47. #### final def wait(arg0: Long): Unit

    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

48. #### def →[B](y: B): (RefChecks, B)

    Implicit information
      This member is added by an implicit conversion from RefChecks to ArrowAssoc[RefChecks] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
      ArrowAssoc

### Inherited from reflect.internal.transform.RefChecks

### Inherited from InfoTransform

### Inherited from Transform

### Inherited from SubComponent

### Inherited from AnyRef

### Inherited from Any

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

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

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

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

### Ungrouped