scala.tools.nsc.transform.patmat.PatternMatching

# PureMatchTranslator

#### class PureMatchTranslator extends MatchTranslator with PureCodegen

Linear Supertypes
PatternMatching.PureCodegen, PatternMatching.PureMatchMonadInterface, PatternMatching.MatchTranslator, PatternMatching.TreeMakers, PatternMatching.CodegenCore, PatternMatching.TypedSubstitution, PatternMatching.MatchMonadInterface, AnyRef, Any
Type Hierarchy Learn more about scaladoc diagrams
Ordering

1. Alphabetic
2. By inheritance

Inherited

1. PureMatchTranslator
2. PureCodegen
3. PureMatchMonadInterface
4. MatchTranslator
5. TreeMakers
6. CodegenCore
7. TypedSubstitution
8. MatchMonadInterface
9. AnyRef
10. Any

Implicitly

1. by any2stringadd
2. by any2stringfmt
3. by any2ArrowAssoc
4. by any2Ensuring

1. Hide All
2. Show all

Learn more about member selection
Visibility

1. Public
2. All

### Instance Constructors

1. #### new PureMatchTranslator(typer: (analyzer)#Typer, matchStrategy: Global.Tree)

### Type Members

1. #### trait AbsCodegen extends AnyRef

   Definition Classes
     CodegenCore

2. #### case class AlternativesTreeMaker (prevBinder: Global.Symbol, altss: List[List[TreeMaker]], pos: Position) extends TreeMaker with NoNewBinders with Product with Serializable

   Definition Classes
     TreeMakers

3. #### case class BodyTreeMaker (body: Global.Tree, matchPt: Global.Type) extends TreeMaker with NoNewBinders with Product with Serializable

   Definition Classes
     TreeMakers

4. #### trait Casegen extends AbsCodegen

   Definition Classes
     CodegenCore

5. #### abstract class CommonCodegen extends AbsCodegen

   Definition Classes
     CodegenCore

6. #### abstract class CondTreeMaker extends FunTreeMaker

   Definition Classes
     TreeMakers

7. #### case class EqualityTestTreeMaker (prevBinder: Global.Symbol, patTree: Global.Tree, pos: Position) extends CondTreeMaker with Product with Serializable

   Definition Classes
     TreeMakers

8. #### abstract class ExtractorCall extends AnyRef

   Definition Classes
     MatchTranslator

9. #### class ExtractorCallProd extends ExtractorCall

   Definition Classes
     MatchTranslator

10. #### class ExtractorCallRegular extends ExtractorCall

    Definition Classes
      MatchTranslator

11. #### case class ExtractorTreeMaker (extractor: Global.Tree, extraCond: Option[Global.Tree], nextBinder: Global.Symbol)(subPatBinders: List[Global.Symbol], subPatRefs: List[Global.Tree], extractorReturnsBoolean: Boolean, checkedLength: Option[Int], prevBinder: Global.Symbol, ignoredSubPatBinders: Set[Global.Symbol]) extends FunTreeMaker with PreserveSubPatBinders with Product with Serializable

    Make a TreeMaker that will result in an extractor call specified by `extractor` the next TreeMaker (here, we don't know which it'll be) is chained after this one by flatMap'ing a function with binder `nextBinder` over our extractor's result the function's body is determined by the next TreeMaker (furthermore, the interpretation of `flatMap` depends on the codegen instance we're using).

12. #### abstract class FunTreeMaker extends TreeMaker

    Definition Classes
      TreeMakers

13. #### case class GuardTreeMaker (guardTree: Global.Tree) extends TreeMaker with NoNewBinders with Product with Serializable

    Definition Classes
      TreeMakers

14. #### trait NoNewBinders extends TreeMaker

    Definition Classes
      TreeMakers

15. #### trait PreserveSubPatBinders extends TreeMaker

    Definition Classes
      TreeMakers

16. #### case class ProductExtractorTreeMaker (prevBinder: Global.Symbol, extraCond: Option[Global.Tree])(subPatBinders: List[Global.Symbol], subPatRefs: List[Global.Tree], mutableBinders: List[Global.Symbol], binderKnownNonNull: Boolean, ignoredSubPatBinders: Set[Global.Symbol]) extends FunTreeMaker with PreserveSubPatBinders with Product with Serializable

    An optimized version of ExtractorTreeMaker for Products.

17. #### case class SubstOnlyTreeMaker (prevBinder: Global.Symbol, nextBinder: Global.Symbol) extends TreeMaker with Product with Serializable

    Definition Classes
      TreeMakers

18. #### class Substitution extends AnyRef

    Definition Classes
      TypedSubstitution

19. #### abstract class TreeMaker extends AnyRef

    Definition Classes
      TreeMakers

20. #### case class TrivialTreeMaker (tree: Global.Tree) extends TreeMaker with NoNewBinders with Product with Serializable

    Definition Classes
      TreeMakers

21. #### case class TypeTestTreeMaker (prevBinder: Global.Symbol, testedBinder: Global.Symbol, expectedTp: Global.Type, nextBinderTp: Global.Type)(pos: Position, extractorArgTypeTest: Boolean = false) extends CondTreeMaker with Product with Serializable

    implements the run-time aspects of (§8.

### Value Members

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

   Definition Classes
     AnyRef

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

   Definition Classes
     Any

3. #### final def ##(): Int

   Definition Classes
     AnyRef → Any

4. #### def +(other: String): String

   Implicit information
     This member is added by an implicit conversion from PureMatchTranslator to StringAdd performed by method any2stringadd in scala.Predef.
   Definition Classes
     StringAdd

5. #### def ->[B](y: B): (PureMatchTranslator, B)

   Implicit information
     This member is added by an implicit conversion from PureMatchTranslator to ArrowAssoc[PureMatchTranslator] performed by method any2ArrowAssoc in scala.Predef.
   Definition Classes
     ArrowAssoc
   Annotations
     @inline()

6. #### final def ==(arg0: AnyRef): Boolean

   Definition Classes
     AnyRef

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

   Definition Classes
     Any

8. #### object Bound

   Definition Classes
     MatchTranslator

9. #### object EmptySubstitution extends Substitution

   Definition Classes
     TypedSubstitution

10. #### object ExtractorCall

    Definition Classes
      MatchTranslator

11. #### object IrrefutableExtractorTreeMaker

    Definition Classes
      TreeMakers

12. #### object PatternBoundToUnderscore

    Definition Classes
      MatchTranslator

13. #### object Substitution

    Definition Classes
      TypedSubstitution

14. #### object TypeTestTreeMaker extends Serializable

    Definition Classes
      TreeMakers

15. #### object WildcardPattern

    A conservative approximation of which patterns do not discern anything.

16. #### def _match(n: Global.Name): SelectStart

    Definition Classes
      PureMatchMonadInterface

17. #### def analyzeCases(prevBinder: Global.Symbol, cases: List[List[TreeMaker]], pt: Global.Type, suppression: PatternMatching.Suppression): Unit

    Definition Classes
      PureMatchTranslator → TreeMakers

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

    Definition Classes
      Any

19. #### def checkMatchVariablePatterns(cases: List[Global.CaseDef]): Unit

    Definition Classes
      MatchTranslator

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

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

21. #### def codegen: AbsCodegen

    Definition Classes
      PureCodegen → CodegenCore

22. #### def combineCases(scrut: Global.Tree, scrutSym: Global.Symbol, casesRaw: List[List[TreeMaker]], pt: Global.Type, owner: Global.Symbol, matchFailGenOverride: Option[(Global.Tree) ⇒ Global.Tree]): Global.Tree

    Definition Classes
      TreeMakers

23. #### def combineCasesNoSubstOnly(scrut: Global.Tree, scrutSym: Global.Symbol, casesNoSubstOnly: List[List[TreeMaker]], pt: Global.Type, owner: Global.Symbol, matchFailGenOverride: Option[(Global.Tree) ⇒ Global.Tree]): Global.Tree

    Definition Classes
      TreeMakers

24. #### def combineExtractors(treeMakers: List[TreeMaker])(casegen: Casegen): Global.Tree

    Definition Classes
      TreeMakers

25. #### val debugInfoEmitVars: Boolean

    Attributes
      protected
    Definition Classes
      TreeMakers

26. #### def emitSwitch(scrut: Global.Tree, scrutSym: Global.Symbol, cases: List[List[TreeMaker]], pt: Global.Type, matchFailGenOverride: Option[(Global.Tree) ⇒ Global.Tree], unchecked: Boolean): Option[Global.Tree]

    Definition Classes
      TreeMakers

27. #### def emitTypeSwitch(bindersAndCases: List[(Global.Symbol, List[TreeMaker])], pt: Global.Type): Option[List[Global.CaseDef]]

    Definition Classes
      TreeMakers

28. #### def ensuring(cond: (PureMatchTranslator) ⇒ Boolean, msg: ⇒ Any): PureMatchTranslator

    Implicit information
      This member is added by an implicit conversion from PureMatchTranslator to Ensuring[PureMatchTranslator] performed by method any2Ensuring in scala.Predef.
    Definition Classes
      Ensuring

29. #### def ensuring(cond: (PureMatchTranslator) ⇒ Boolean): PureMatchTranslator

    Implicit information
      This member is added by an implicit conversion from PureMatchTranslator to Ensuring[PureMatchTranslator] performed by method any2Ensuring in scala.Predef.
    Definition Classes
      Ensuring

30. #### def ensuring(cond: Boolean, msg: ⇒ Any): PureMatchTranslator

    Implicit information
      This member is added by an implicit conversion from PureMatchTranslator to Ensuring[PureMatchTranslator] performed by method any2Ensuring in scala.Predef.
    Definition Classes
      Ensuring

31. #### def ensuring(cond: Boolean): PureMatchTranslator

    Implicit information
      This member is added by an implicit conversion from PureMatchTranslator to Ensuring[PureMatchTranslator] performed by method any2Ensuring in scala.Predef.
    Definition Classes
      Ensuring

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

    Definition Classes
      AnyRef

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

    Definition Classes
      AnyRef → Any

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

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

35. #### def fixerUpper(origOwner: Global.Symbol, pos: Position): Global.Traverser

    Attributes
      protected
    Definition Classes
      TreeMakers

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

    Implicit information
      This member is added by an implicit conversion from PureMatchTranslator to StringFormat performed by method any2stringfmt in scala.Predef.
    Definition Classes
      StringFormat
    Annotations
      @inline()

37. #### def freshName(prefix: String): Global.TermName

    Definition Classes
      CodegenCore

38. #### def freshSym(pos: Position, tp: Global.Type = NoType, prefix: String = "x"): Global.TermSymbol

    Definition Classes
      CodegenCore

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

    Definition Classes
      AnyRef → Any

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

    Definition Classes
      AnyRef → Any

41. #### def inMatchMonad(tp: Global.Type): Global.Type

    Definition Classes
      PureMatchMonadInterface → MatchMonadInterface

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

    Definition Classes
      Any

43. #### final def matchMonadResult(tp: Global.Type): Global.Type

    Definition Classes
      MatchMonadInterface

44. #### def matchMonadSym: Global.Symbol

    Attributes
      protected
    Definition Classes
      PureMatchMonadInterface → MatchMonadInterface

45. #### val matchOwner: Global.Symbol

    Definition Classes
      MatchMonadInterface

46. #### val matchStrategy: Global.Tree

    Definition Classes
      PureMatchTranslator → PureMatchMonadInterface

47. #### def matchingSymbolInScope(pat: Global.Tree): Global.Symbol

    Definition Classes
      MatchTranslator

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

    Definition Classes
      AnyRef

49. #### def newSynthCaseLabel(name: String): Global.MethodSymbol

    Definition Classes
      CodegenCore

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

    Definition Classes
      AnyRef

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

    Definition Classes
      AnyRef

52. #### def optimizeCases(prevBinder: Global.Symbol, cases: List[List[TreeMaker]], pt: Global.Type): (List[List[TreeMaker]], collection.immutable.Nil.type)

    Definition Classes
      PureMatchTranslator → TreeMakers

53. #### def propagateSubstitution(treeMakers: List[TreeMaker], initial: Substitution): List[TreeMaker]

    Definition Classes
      TreeMakers

54. #### object pureCodegen extends CommonCodegen with Casegen

    Definition Classes
      PureCodegen

55. #### def pureType(tp: Global.Type): Global.Type

    Definition Classes
      PureMatchMonadInterface → MatchMonadInterface

56. #### def removeSubstOnly(makers: List[TreeMaker]): collection.immutable.List[TreeMaker]

    Definition Classes
      TreeMakers

57. #### def reportMissingCases(pos: Position, counterExamples: List[String]): Unit

    Definition Classes
      MatchMonadInterface

58. #### def reportUnreachable(pos: Position): Unit

    Definition Classes
      MatchMonadInterface

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

    Definition Classes
      AnyRef

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

    Definition Classes
      AnyRef → Any

61. #### def translateBody(body: Global.Tree, matchPt: Global.Type): TreeMaker

    Definition Classes
      MatchTranslator

62. #### def translateCase(scrutSym: Global.Symbol, pt: Global.Type)(caseDef: Global.CaseDef): collection.immutable.List[TreeMaker]

    The translation of `pat if guard => body` has two aspects: 1) the substitution due to the variables bound by patterns 2) the combination of the extractor calls using `flatMap`.

    The translation of `pat if guard => body` has two aspects: 1) the substitution due to the variables bound by patterns 2) the combination of the extractor calls using `flatMap`.

    2) is easy -- it looks like: `translatePattern_1.flatMap(translatePattern_2....flatMap(translatePattern_N.flatMap(translateGuard.flatMap((x_i) => success(Xbody(x_i)))))...)` this must be right-leaning tree, as can be seen intuitively by considering the scope of bound variables: variables bound by pat_1 must be visible from the function inside the left-most flatMap right up to Xbody all the way on the right 1) is tricky because translatePattern_i determines the shape of translatePattern_i+1: zoom in on `translatePattern_1.flatMap(translatePattern_2)` for example -- it actually looks more like: `translatePattern_1(x_scrut).flatMap((x_1) => {y_i -> x_1._i}translatePattern_2)`

    `x_1` references the result (inside the monad) of the extractor corresponding to `pat_1`, this result holds the values for the constructor arguments, which translatePattern_1 has extracted from the object pointed to by `x_scrut`. The `y_i` are the symbols bound by `pat_1` (in order) in the scope of the remainder of the pattern, and they must thus be replaced by:

    - (for 1-ary unapply) x_1
    - (for n-ary unapply, n > 1) selection of the i'th tuple component of `x_1`
    - (for unapplySeq) x_1.apply(i)

    in the treemakers,

    Thus, the result type of `translatePattern_i`'s extractor must conform to `M[(T_1,..., T_n)]`.

    Operationally, phase 1) is a foldLeft, since we must consider the depth-first-flattening of the transformed patterns from left to right. For every pattern ast node, it produces a transformed ast and a function that will take care of binding and substitution of the next ast (to the right).

    Definition Classes
      MatchTranslator

63. #### def translateGuard(guard: Global.Tree): List[TreeMaker]

    Definition Classes
      MatchTranslator

64. #### def translateMatch(match_: Global.Match): Global.Tree

    Implement a pattern match by turning its cases (including the implicit failure case) into the corresponding (monadic) extractors, and combining them with the `orElse` combinator.

    Implement a pattern match by turning its cases (including the implicit failure case) into the corresponding (monadic) extractors, and combining them with the `orElse` combinator.

    For `scrutinee match { case1 ... caseN }`, the resulting tree has the shape `runOrElse(scrutinee)(x => translateCase1(x).orElse(translateCase2(x)).....orElse(zero))`

    NOTE: the resulting tree is not type checked, nor are nested pattern matches transformed thus, you must typecheck the result (and that will in turn translate nested matches) this could probably optimized... (but note that the matchStrategy must be solved for each nested patternmatch)

    Definition Classes
      MatchTranslator

65. #### def translatePattern(patBinder: Global.Symbol, patTree: Global.Tree): List[TreeMaker]

    Definition Classes
      MatchTranslator

66. #### def translateTry(caseDefs: List[Global.CaseDef], pt: Global.Type, pos: Global.Position): List[Global.CaseDef]

    Definition Classes
      MatchTranslator

67. #### val typer: (analyzer)#Typer

    Definition Classes
      PureMatchTranslator → MatchMonadInterface

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

    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

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

    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

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

    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

71. #### def →[B](y: B): (PureMatchTranslator, B)

    Implicit information
      This member is added by an implicit conversion from PureMatchTranslator to ArrowAssoc[PureMatchTranslator] performed by method any2ArrowAssoc in scala.Predef.
    Definition Classes
      ArrowAssoc

### Shadowed Implicit Value Members

1. #### val self: Any

   Implicit information
     This member is added by an implicit conversion from PureMatchTranslator to StringAdd performed by method any2stringadd in scala.Predef.
   Shadowing
     This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
     To access this member you can use a type ascription:

         (pureMatchTranslator: StringAdd).self

   Definition Classes
     StringAdd

2. #### val self: Any

   Implicit information
     This member is added by an implicit conversion from PureMatchTranslator to StringFormat performed by method any2stringfmt in scala.Predef.
   Shadowing
     This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
     To access this member you can use a type ascription:

         (pureMatchTranslator: StringFormat).self

   Definition Classes
     StringFormat

### Deprecated Value Members

1. #### def x: PureMatchTranslator

   Implicit information
     This member is added by an implicit conversion from PureMatchTranslator to ArrowAssoc[PureMatchTranslator] performed by method any2ArrowAssoc in scala.Predef.
   Shadowing
     This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
     To access this member you can use a type ascription:

         (pureMatchTranslator: ArrowAssoc[PureMatchTranslator]).x

   Definition Classes
     ArrowAssoc
   Annotations
     @deprecated
   Deprecated

     (Since version 2.10.0) Use `leftOfArrow`instead``

2. #### def x: PureMatchTranslator

   Implicit information
     This member is added by an implicit conversion from PureMatchTranslator to Ensuring[PureMatchTranslator] performed by method any2Ensuring in scala.Predef.
   Shadowing
     This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
     To access this member you can use a type ascription:

         (pureMatchTranslator: Ensuring[PureMatchTranslator]).x

   Definition Classes
     Ensuring
   Annotations
     @deprecated
   Deprecated

     (Since version 2.10.0) Use `resultOfEnsuring`instead``

### Inherited from PatternMatching.PureCodegen

### Inherited from PatternMatching.PureMatchMonadInterface

### Inherited from PatternMatching.MatchTranslator

### Inherited from PatternMatching.TreeMakers

### Inherited from PatternMatching.CodegenCore

### Inherited from PatternMatching.TypedSubstitution

### Inherited from PatternMatching.MatchMonadInterface

### Inherited from AnyRef

### Inherited from Any

### Inherited by implicit conversion any2stringadd from PureMatchTranslator to StringAdd

### Inherited by implicit conversion any2stringfmt from PureMatchTranslator to StringFormat

### Inherited by implicit conversion any2ArrowAssoc from PureMatchTranslator to ArrowAssoc[PureMatchTranslator]

### Inherited by implicit conversion any2Ensuring from PureMatchTranslator to Ensuring[PureMatchTranslator]

### Ungrouped