scala.reflect.internal.util

Origins

abstract class Origins extends AnyRef

A debugging class for logging from whence a method is being called. Say you wanted to discover who was calling phase_= in SymbolTable. You could do this:

   private lazy val origins = Origins[SymbolTable]("phase_=")
   // Commented out original enclosed for contrast
   // final def phase_=(p: Phase): Unit = {
   final def phase_=(p: Phase): Unit = origins {

And that's it. When the JVM exits it would issue a report something like this:

 >> Origins scala.tools.nsc.symtab.SymbolTable.phase_= logged 145585 calls from 51 distinguished sources.

   71114   scala.tools.nsc.symtab.Symbols$Symbol.unsafeTypeParams(Symbols.scala:862)
   16584   scala.tools.nsc.symtab.Symbols$Symbol.rawInfo(Symbols.scala:757)
   15411   scala.tools.nsc.symtab.Symbols$Symbol.unsafeTypeParams(Symbols.scala:869)
   11507   scala.tools.nsc.symtab.Symbols$Symbol.rawInfo(Symbols.scala:770)
   10285   scala.tools.nsc.symtab.Symbols$Symbol.unsafeTypeParams(Symbols.scala:864)
    6860   scala.tools.nsc.transform.SpecializeTypes.specializedTypeVars(SpecializeTypes.scala:304)
    ...
Source
Origins.scala
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Instance Constructors

  1. new Origins()

Type Members

  1. abstract type Rep

Abstract Value Members

  1. abstract def newRep(xs: StackSlice): Rep

  2. abstract def originClass: String

  3. abstract def repString(rep: Rep): String

Concrete Value Members

  1. final def !=(arg0: AnyRef): Boolean

    Definition Classes
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  2. final def !=(arg0: Any): Boolean

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  3. final def ##(): Int

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  4. final def ==(arg0: AnyRef): Boolean

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

    Definition Classes
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  6. def apply[T](body: ⇒ T): T

  7. final def asInstanceOf[T0]: T0

    Definition Classes
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  8. def clear(): Unit

  9. def clone(): AnyRef

    Attributes
    protected[lang]
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    @throws()

  10. final def eq(arg0: AnyRef): Boolean

    Definition Classes
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  11. def equals(arg0: Any): Boolean

    Definition Classes
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  12. def finalize(): Unit

    Attributes
    protected[lang]
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    @throws()

  13. final def getClass(): Class[_]

    Definition Classes
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  14. def hashCode(): Int

    Definition Classes
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  15. final def isInstanceOf[T0]: Boolean

    Definition Classes
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  16. final def ne(arg0: AnyRef): Boolean

    Definition Classes
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  17. final def notify(): Unit

    Definition Classes
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  18. final def notifyAll(): Unit

    Definition Classes
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  19. def purge(): Unit

  20. def setTag(tag: String): Origins.this.type

  21. def show(): Unit

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

    Definition Classes
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  23. def tag: String

  24. def toString(): String

    Definition Classes
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  25. final def wait(): Unit

    Definition Classes
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    @throws()

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

    Definition Classes
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    @throws()

  27. final def wait(arg0: Long): Unit

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