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object alignPatterns extends ScalacPatternExpander

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Type Members

  1. final case class Aligned (patterns: Patterns, extractor: Extractor) extends Product with Serializable

    If elementArity is...

    If elementArity is... 0: A perfect match between extractor and the fixed patterns. If there is a star pattern it will match any sequence. > 0: There are more patterns than products. There will have to be a sequence which can populate at least <elementArity> patterns. < 0: There are more products than patterns: compile time error.

    Definition Classes
    PatternExpander
  2. final case class Extractor (whole: Type, fixed: List[Type], repeated: Repeated, typeOfSinglePattern: Type) extends Product with Serializable

    An 'extractor' can be a case class or an unapply or unapplySeq method.

    An 'extractor' can be a case class or an unapply or unapplySeq method. Decoding what it is that they extract takes place before we arrive here, so that this class can concentrate only on the relationship between patterns and types.

    In a case class, the class is the unextracted type and the fixed and repeated types are derived from its constructor parameters.

    In an unapply, this is reversed: the parameter to the unapply is the unextracted type, and the other types are derived based on the return type of the unapply method.

    In other words, this case class and unapply are encoded the same:

    case class Foo(x: Int, y: Int, zs: Char*) def unapplySeq(x: Foo): Option[(Int, Int, Seq[Char])]

    Both are Extractor(Foo, Int :: Int :: Nil, Repeated(Seq[Char], Char, Char*))

    whole

    The type in its unextracted form

    fixed

    The non-sequence types which are extracted

    repeated

    The sequence type which is extracted

    Definition Classes
    PatternExpander
  3. final case class Patterns (fixed: List[Pattern], star: Pattern) extends Product with Serializable
    Definition Classes
    PatternExpander
  4. sealed case class Repeated (sequenceType: Type, elementType: Type, repeatedType: Type) extends Product with Serializable

    It's not optimal that we're carrying both sequence and repeated type here, but the implementation requires more unraveling before it can be avoided.

    It's not optimal that we're carrying both sequence and repeated type here, but the implementation requires more unraveling before it can be avoided.

    sequenceType is Seq[T], elementType is T, repeatedType is T*.

    Definition Classes
    PatternExpander
  5. final case class TypedPat (pat: Pattern, tpe: Type) extends Product with Serializable
    Definition Classes
    PatternExpander

Value Members

  1. object NoRepeated extends Repeated
    Definition Classes
    PatternExpander
  2. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  3. final def ##(): Int
    Definition Classes
    AnyRef → Any
  4. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  5. def NoPattern: Global.EmptyTree.type

    You'll note we're not inside the cake.

    You'll note we're not inside the cake. "Pattern" and "Type" are arbitrary types here, and NoPattern and NoType arbitrary values.

    Definition Classes
    ScalacPatternExpander → PatternExpander
  6. def NoType: Global.NoType.type
    Definition Classes
    ScalacPatternExpander → PatternExpander
  7. def apply(context: (analyzer)#Context, tree: Global.Tree): Aligned
  8. def apply(context: (analyzer)#Context, sel: Global.Tree, args: List[Global.Tree]): Aligned
  9. def applyMethodTypes(method: Global.Type): Extractor

    In this case we are basing the pattern expansion on a case class constructor.

    In this case we are basing the pattern expansion on a case class constructor. The argument is the MethodType carried by the primary constructor.

    Definition Classes
    ScalacPatternExpander
  10. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  11. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  12. def elementTypeOf(tpe: Global.Type): Global.Type
    Definition Classes
    ScalacPatternExpander
  13. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  14. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  15. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  16. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
  17. def hashCode(): Int
    Definition Classes
    AnyRef → Any
  18. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  19. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  20. def newExtractor(whole: Global.Type, fixed: List[Global.Type], repeated: Repeated): Extractor
    Definition Classes
    ScalacPatternExpander
  21. def newExtractor(whole: Global.Type, fixed: List[Global.Type], repeated: Repeated, typeOfSinglePattern: Global.Type): Extractor
    Definition Classes
    ScalacPatternExpander
  22. def newPatterns(patterns: List[Global.Tree]): Patterns
    Definition Classes
    ScalacPatternExpander
  23. final def notify(): Unit
    Definition Classes
    AnyRef
  24. final def notifyAll(): Unit
    Definition Classes
    AnyRef
  25. def repeatedFromSeq(seqType: Global.Type): Repeated
    Definition Classes
    ScalacPatternExpander
  26. def repeatedFromVarargs(repeated: Global.Type): Repeated
    Definition Classes
    ScalacPatternExpander
  27. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  28. def toString(): String
    Definition Classes
    AnyRef → Any
  29. def unapplyMethodTypes(context: (analyzer)#Context, whole: Global.Type, result: Global.Type, isSeq: Boolean): Extractor

    In this case, expansion is based on an unapply or unapplySeq method.

    In this case, expansion is based on an unapply or unapplySeq method. Unfortunately the MethodType does not carry the information of whether it was unapplySeq, so we have to funnel that information in separately.

    Definition Classes
    ScalacPatternExpander
  30. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  31. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  32. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from ScalacPatternExpander

Inherited from PatternExpander[Global.Tree, Global.Type]

Inherited from AnyRef

Inherited from Any

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