scala.tools.nsc.transform.patmat.MatchApproximation

MatchApproximator

trait MatchApproximator extends TreeMakers with TreesAndTypesDomain

Represent a match as a formula in propositional logic that encodes whether the match matches (abstractly: we only consider types)

Linear Supertypes
MatchApproximation.TreesAndTypesDomain, MatchApproximation.CheckableTreeAndTypeAnalysis, MatchApproximation.PropositionalLogic, MatchApproximation.TreeMakers, MatchApproximation.CodegenCore, MatchApproximation.TypedSubstitution, MatchApproximation.MatchMonadInterface, AnyRef, Any
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  1. MatchApproximator
  2. TreesAndTypesDomain
  3. CheckableTreeAndTypeAnalysis
  4. PropositionalLogic
  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
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Type Members

  1. trait AbsCodegen extends AnyRef

    Definition Classes
    CodegenCore
  2. trait AbsVar extends AnyRef

    Definition Classes
    PropositionalLogic
  3. case class AlternativesTreeMaker(prevBinder: Global.Symbol, altss: List[List[TreeMaker]], pos: Position) extends TreeMaker with NoNewBinders with Product with Serializable

    Definition Classes
    TreeMakers
  4. case class And(a: Prop, b: Prop) extends Prop with Product with Serializable

    Definition Classes
    PropositionalLogic
  5. case class BodyTreeMaker(body: Global.Tree, matchPt: Global.Type) extends TreeMaker with NoNewBinders with Product with Serializable

    Definition Classes
    TreeMakers
  6. trait Casegen extends AbsCodegen

    Definition Classes
    CodegenCore
  7. abstract class CommonCodegen extends AbsCodegen

    Definition Classes
    CodegenCore
  8. abstract class CondTreeMaker extends FunTreeMaker

    Definition Classes
    TreeMakers
  9. sealed abstract class Const extends AnyRef

  10. case class Eq(p: Var, q: Const) extends Prop with Product with Serializable

    Definition Classes
    PropositionalLogic
  11. case class EqualityTestTreeMaker(prevBinder: Global.Symbol, patTree: Global.Tree, pos: Position) extends CondTreeMaker with Product with Serializable

    Definition Classes
    TreeMakers
  12. 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).

  13. abstract type Formula

    Definition Classes
    PropositionalLogic
  14. abstract type FormulaBuilder

    Definition Classes
    PropositionalLogic
  15. abstract class FunTreeMaker extends TreeMaker

    Definition Classes
    TreeMakers
  16. case class GuardTreeMaker(guardTree: Global.Tree) extends TreeMaker with NoNewBinders with Product with Serializable

    Definition Classes
    TreeMakers
  17. type Model = Map[Sym, Boolean]

    Definition Classes
    PropositionalLogic
  18. trait NoNewBinders extends TreeMaker

    Definition Classes
    TreeMakers
  19. case class Not(a: Prop) extends Prop with Product with Serializable

    Definition Classes
    PropositionalLogic
  20. case class Or(a: Prop, b: Prop) extends Prop with Product with Serializable

    Definition Classes
    PropositionalLogic
  21. trait PreserveSubPatBinders extends TreeMaker

    Definition Classes
    TreeMakers
  22. 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.

  23. class Prop extends AnyRef

    Definition Classes
    PropositionalLogic
  24. trait PropMap extends AnyRef

    Definition Classes
    PropositionalLogic
  25. trait PropTraverser extends AnyRef

    Definition Classes
    PropositionalLogic
  26. case class SubstOnlyTreeMaker(prevBinder: Global.Symbol, nextBinder: Global.Symbol) extends TreeMaker with Product with Serializable

    Definition Classes
    TreeMakers
  27. class Substitution extends AnyRef

    Definition Classes
    TypedSubstitution
  28. abstract case class Sym(variable: Var, const: Const) extends Prop with Product with Serializable

    Definition Classes
    PropositionalLogic
  29. case class Test(prop: MatchApproximator.Prop, treeMaker: MatchApproximator.TreeMaker) extends Product with Serializable

  30. type Tree = Global.Tree

  31. abstract class TreeMaker extends AnyRef

    Definition Classes
    TreeMakers
  32. class TreeMakersToProps extends AnyRef

  33. class TreeMakersToPropsIgnoreNullChecks extends TreeMakersToProps

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

    Definition Classes
    TreeMakers
  35. type Type = Global.Type

  36. sealed class TypeConst extends Const

  37. trait TypeConstExtractor extends AnyRef

    Definition Classes
    PropositionalLogic
  38. 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.

  39. class UniqueSym extends Sym

    Definition Classes
    PropositionalLogic
  40. sealed class ValueConst extends Const

  41. trait ValueConstExtractor extends AnyRef

    Definition Classes
    PropositionalLogic
  42. class Var extends AbsVar

  43. trait VarExtractor extends AnyRef

    Definition Classes
    PropositionalLogic

Abstract Value Members

  1. abstract val EmptyModel: Model

    Definition Classes
    PropositionalLogic
  2. abstract val NoModel: Model

    Definition Classes
    PropositionalLogic
  3. abstract def addFormula(buff: FormulaBuilder, f: Formula): Unit

    Definition Classes
    PropositionalLogic
  4. abstract def analyzeCases(prevBinder: Global.Symbol, cases: List[List[TreeMaker]], pt: Global.Type, suppression: MatchApproximation.Suppression): Unit

    Definition Classes
    TreeMakers
  5. abstract def andFormula(a: Formula, b: Formula): Formula

    Definition Classes
    PropositionalLogic
  6. abstract def cnfString(f: Formula): String

    Definition Classes
    PropositionalLogic
  7. abstract def codegen: AbsCodegen

    Definition Classes
    CodegenCore
  8. abstract def eqFreePropToSolvable(p: Prop): Formula

    Definition Classes
    PropositionalLogic
  9. abstract def findAllModelsFor(f: Formula): List[Model]

    Definition Classes
    PropositionalLogic
  10. abstract def findModelFor(f: Formula): Model

    Definition Classes
    PropositionalLogic
  11. abstract def formulaBuilder: FormulaBuilder

    Definition Classes
    PropositionalLogic
  12. abstract def inMatchMonad(tp: Global.Type): Global.Type

    Definition Classes
    MatchMonadInterface
  13. abstract def matchMonadSym: Global.Symbol

    Attributes
    protected
    Definition Classes
    MatchMonadInterface
  14. abstract def optimizeCases(prevBinder: Global.Symbol, cases: List[List[TreeMaker]], pt: Global.Type): (List[List[TreeMaker]], List[Global.Tree])

    Definition Classes
    TreeMakers
  15. abstract def pureType(tp: Global.Type): Global.Type

    Definition Classes
    MatchMonadInterface
  16. abstract def simplifyFormula(a: Formula): Formula

    Definition Classes
    PropositionalLogic
  17. abstract def toFormula(buff: FormulaBuilder): Formula

    Definition Classes
    PropositionalLogic
  18. abstract val typer: (analyzer)#Typer

    Definition Classes
    CheckableTreeAndTypeAnalysis

Concrete 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 MatchApproximator to StringAdd performed by method any2stringadd in scala.Predef.
    Definition Classes
    StringAdd
  5. def ->[B](y: B): (MatchApproximator, B)

    Implicit information
    This member is added by an implicit conversion from MatchApproximator to ArrowAssoc[MatchApproximator] performed by method any2ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  6. def /\(props: Iterable[Prop]): Prop

    Definition Classes
    PropositionalLogic
  7. final def ==(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  8. final def ==(arg0: Any): Boolean

    Definition Classes
    Any
  9. object AnalysisBudget

    Definition Classes
    PropositionalLogic
  10. object Const

    Definition Classes
    TreesAndTypesDomain
  11. object EmptySubstitution extends Substitution

    Definition Classes
    TypedSubstitution
  12. object False extends Prop with Product with Serializable

    Definition Classes
    PropositionalLogic
  13. object IrrefutableExtractorTreeMaker

    Definition Classes
    TreeMakers
  14. object NullConst extends Const with Product with Serializable

  15. lazy val NullTp: Global.UniqueConstantType

    Definition Classes
    TreesAndTypesDomain
  16. object Substitution

    Definition Classes
    TypedSubstitution
  17. object Sym extends Serializable

    Definition Classes
    PropositionalLogic
  18. object Test extends Serializable

  19. object True extends Prop with Product with Serializable

    Definition Classes
    PropositionalLogic
  20. object TypeConst extends TypeConstExtractor

  21. object TypeTestTreeMaker extends Serializable

    Definition Classes
    TreeMakers
  22. object ValueConst extends ValueConstExtractor

  23. object Var extends VarExtractor

  24. def \/(props: Iterable[Prop]): Prop

    Definition Classes
    PropositionalLogic
  25. def approximateMatchConservative(root: Global.Symbol, cases: List[List[TreeMaker]]): List[List[Test]]

  26. final def asInstanceOf[T0]: T0

    Definition Classes
    Any
  27. final def caseWithoutBodyToProp(tests: List[Test]): Prop

    Attributes
    protected
  28. def checkableType(tp: Global.Type): Global.Type

    Definition Classes
    CheckableTreeAndTypeAnalysis
  29. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  30. 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
  31. 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
  32. def combineExtractors(treeMakers: List[TreeMaker])(casegen: Casegen): Global.Tree

    Definition Classes
    TreeMakers
  33. val debugInfoEmitVars: Boolean

    Attributes
    protected
    Definition Classes
    TreeMakers
  34. 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
  35. def emitTypeSwitch(bindersAndCases: List[(Global.Symbol, List[TreeMaker])], pt: Global.Type): Option[List[Global.CaseDef]]

    Definition Classes
    TreeMakers
  36. def ensuring(cond: (MatchApproximator) ⇒ Boolean, msg: ⇒ Any): MatchApproximator

    Implicit information
    This member is added by an implicit conversion from MatchApproximator to Ensuring[MatchApproximator] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  37. def ensuring(cond: (MatchApproximator) ⇒ Boolean): MatchApproximator

    Implicit information
    This member is added by an implicit conversion from MatchApproximator to Ensuring[MatchApproximator] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  38. def ensuring(cond: Boolean, msg: ⇒ Any): MatchApproximator

    Implicit information
    This member is added by an implicit conversion from MatchApproximator to Ensuring[MatchApproximator] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  39. def ensuring(cond: Boolean): MatchApproximator

    Implicit information
    This member is added by an implicit conversion from MatchApproximator to Ensuring[MatchApproximator] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  40. def enumerateSubtypes(tp: Global.Type): Option[List[Global.Type]]

    Definition Classes
    CheckableTreeAndTypeAnalysis
  41. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  42. def equals(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any
  43. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  44. def fixerUpper(origOwner: Global.Symbol, pos: Position): Global.Traverser

    Attributes
    protected
    Definition Classes
    TreeMakers
  45. def formatted(fmtstr: String): String

    Implicit information
    This member is added by an implicit conversion from MatchApproximator to StringFormat performed by method any2stringfmt in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  46. def freshName(prefix: String): Global.TermName

    Definition Classes
    CodegenCore
  47. def freshSym(pos: Position, tp: Global.Type = NoType, prefix: String = "x"): Global.TermSymbol

    Definition Classes
    CodegenCore
  48. def gatherVariables(p: Prop): Set[Var]

    Definition Classes
    PropositionalLogic
  49. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any
  50. def hashCode(): Int

    Definition Classes
    AnyRef → Any
  51. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any
  52. final def matchMonadResult(tp: Global.Type): Global.Type

    Definition Classes
    MatchMonadInterface
  53. val matchOwner: Global.Symbol

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

    Definition Classes
    AnyRef
  55. def newSynthCaseLabel(name: String): Global.MethodSymbol

    Definition Classes
    CodegenCore
  56. final def notify(): Unit

    Definition Classes
    AnyRef
  57. final def notifyAll(): Unit

    Definition Classes
    AnyRef
  58. def prepareNewAnalysis(): Unit

  59. def propToSolvable(p: Prop): Formula

    Definition Classes
    PropositionalLogic
  60. def propagateSubstitution(treeMakers: List[TreeMaker], initial: Substitution): List[TreeMaker]

    Definition Classes
    TreeMakers
  61. def removeSubstOnly(makers: List[TreeMaker]): collection.immutable.List[TreeMaker]

    Definition Classes
    TreeMakers
  62. def removeVarEq(props: List[Prop], modelNull: Boolean = false): (Formula, List[Formula])

    Definition Classes
    PropositionalLogic
  63. def reportMissingCases(pos: Position, counterExamples: List[String]): Unit

    Definition Classes
    MatchMonadInterface
  64. def reportUnreachable(pos: Position): Unit

    Definition Classes
    MatchMonadInterface
  65. def showTests(testss: List[List[Test]]): Unit

  66. def showTreeMakers(cases: List[List[TreeMaker]]): Unit

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

    Definition Classes
    AnyRef
  68. def toString(): String

    Definition Classes
    AnyRef → Any
  69. def uncheckableType(tp: Global.Type): Boolean

    Definition Classes
    CheckableTreeAndTypeAnalysis
  70. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  71. final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  72. final def wait(arg0: Long): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  73. def [B](y: B): (MatchApproximator, B)

    Implicit information
    This member is added by an implicit conversion from MatchApproximator to ArrowAssoc[MatchApproximator] 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 MatchApproximator 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:
    (matchApproximator: StringAdd).self
    Definition Classes
    StringAdd
  2. val self: Any

    Implicit information
    This member is added by an implicit conversion from MatchApproximator 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:
    (matchApproximator: StringFormat).self
    Definition Classes
    StringFormat

Deprecated Value Members

  1. def x: MatchApproximator

    Implicit information
    This member is added by an implicit conversion from MatchApproximator to ArrowAssoc[MatchApproximator] 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:
    (matchApproximator: ArrowAssoc[MatchApproximator]).x
    Definition Classes
    ArrowAssoc
    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.0) Use leftOfArrow instead

  2. def x: MatchApproximator

    Implicit information
    This member is added by an implicit conversion from MatchApproximator to Ensuring[MatchApproximator] 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:
    (matchApproximator: Ensuring[MatchApproximator]).x
    Definition Classes
    Ensuring
    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.0) Use resultOfEnsuring instead

Inherited from MatchApproximation.TreesAndTypesDomain

Inherited from MatchApproximation.CheckableTreeAndTypeAnalysis

Inherited from MatchApproximation.PropositionalLogic

Inherited from MatchApproximation.TreeMakers

Inherited from MatchApproximation.CodegenCore

Inherited from MatchApproximation.TypedSubstitution

Inherited from MatchApproximation.MatchMonadInterface

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from MatchApproximator to StringAdd

Inherited by implicit conversion any2stringfmt from MatchApproximator to StringFormat

Inherited by implicit conversion any2ArrowAssoc from MatchApproximator to ArrowAssoc[MatchApproximator]

Inherited by implicit conversion any2Ensuring from MatchApproximator to Ensuring[MatchApproximator]

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