Packages

t

scala.tools.nsc.transform.patmat

MatchOptimization

trait MatchOptimization extends MatchTreeMaking with MatchApproximation

Optimize and analyze matches based on their TreeMaker-representation.

The patmat translation doesn't rely on this, so it could be disabled in principle.

  • well, not quite: the backend crashes if we emit duplicates in switches (e.g. scala/bug#7290)
Source
MatchOptimization.scala
Known Subclasses
Type Hierarchy
Ordering
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  2. By Inheritance
Inherited
  1. MatchOptimization
  2. MatchApproximation
  3. ScalaLogic
  4. Logic
  5. TreeAndTypeAnalysis
  6. MatchTreeMaking
  7. Debugging
  8. MatchCodeGen
  9. Interface
  10. TreeDSL
  11. AnyRef
  12. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Visibility
  1. Public
  2. Protected

Type Members

  1. trait MatchMonadInterface extends AnyRef
    Definition Classes
    Interface
  2. trait TypedSubstitution extends MatchMonadInterface
    Definition Classes
    Interface
  3. trait PropositionalLogic extends AnyRef
    Definition Classes
    Logic
  4. 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)

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

    Definition Classes
    MatchApproximation
  5. trait CodegenCore extends MatchMonadInterface
    Definition Classes
    MatchCodeGen
  6. trait OptimizedCodegen extends CodegenCore with TypedSubstitution with MatchMonadInterface
    Definition Classes
    MatchCodeGen
  7. trait CommonSubconditionElimination extends OptimizedCodegen with MatchApproximator
  8. trait MatchOptimizer extends OptimizedCodegen with SwitchEmission with CommonSubconditionElimination
  9. trait SwitchEmission extends TreeMakers with MatchMonadInterface
  10. final case class Suppression(suppressExhaustive: Boolean, suppressUnreachable: Boolean) extends Product with Serializable
    Definition Classes
    MatchTreeMaking
  11. trait TreeMakers extends TypedSubstitution with CodegenCore
    Definition Classes
    MatchTreeMaking
  12. trait TreesAndTypesDomain extends PropositionalLogic with CheckableTreeAndTypeAnalysis
    Definition Classes
    ScalaLogic
  13. trait CheckableTreeAndTypeAnalysis extends AnyRef
    Definition Classes
    TreeAndTypeAnalysis

Abstract Value Members

  1. abstract val global: Global
    Definition Classes
    Debugging

Concrete Value Members

  1. object CODE
    Definition Classes
    TreeDSL
  2. object debug
    Definition Classes
    Debugging
  3. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def ##: Int
    Definition Classes
    AnyRef → Any
  5. def +(other: String): String
    Implicit
    This member is added by an implicit conversion from MatchOptimization toany2stringadd[MatchOptimization] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  6. def ->[B](y: B): (MatchOptimization, B)
    Implicit
    This member is added by an implicit conversion from MatchOptimization toArrowAssoc[MatchOptimization] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  7. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  8. def alignAcrossRows(xss: List[List[Any]], sep: String, lineSep: String = "\n"): String
    Definition Classes
    Logic
  9. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  10. def binderTypeImpliedByPattern(pat: Global.Tree, pt: Global.Type): Global.Type

    Compute the type T implied for a value v matched by a pattern pat (with expected type pt).

    Compute the type T implied for a value v matched by a pattern pat (with expected type pt).

    Usually, this is the pattern's type because pattern matching implies instance-of checks.

    However, Stable Identifier and Literal patterns are matched using ==, which does not imply a type for the binder that binds the matched value. E.g., in case x@Nil => x , all we know about x is that it satisfies Nil == x, which could be anything. A type pattern with a literal type works the same as the corresponding literal pattern. A literal pattern with a Boolean or Unit pattern does enforce that the respective value (true, false, ()) was matched, so in those cases, the pattern type is assumed.

    The other patterns imply type tests, so we can safely deduce that the binder has the pattern's type when the pattern matches. Concretely, a literal, type pattern, a case class (the constructor's result type) or extractor (the unapply's argument type) all imply type tests.

    See scala/bug#1503, scala/bug#5024: don't cast binders to types we're not sure they have

    Definition Classes
    TreeAndTypeAnalysis
  11. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  12. def ensuring(cond: (MatchOptimization) => Boolean, msg: => Any): MatchOptimization
    Implicit
    This member is added by an implicit conversion from MatchOptimization toEnsuring[MatchOptimization] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  13. def ensuring(cond: (MatchOptimization) => Boolean): MatchOptimization
    Implicit
    This member is added by an implicit conversion from MatchOptimization toEnsuring[MatchOptimization] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  14. def ensuring(cond: Boolean, msg: => Any): MatchOptimization
    Implicit
    This member is added by an implicit conversion from MatchOptimization toEnsuring[MatchOptimization] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  15. def ensuring(cond: Boolean): MatchOptimization
    Implicit
    This member is added by an implicit conversion from MatchOptimization toEnsuring[MatchOptimization] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  16. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  17. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  18. def equivalentTree(a: Global.Tree, b: Global.Tree): Boolean
    Definition Classes
    TreeAndTypeAnalysis
  19. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  20. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from MatchOptimization toStringFormat[MatchOptimization] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  21. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  22. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  23. def instanceOfTpImplies(tp: Global.Type, tpImplied: Global.Type): Boolean
    Definition Classes
    TreeAndTypeAnalysis
  24. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  25. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  26. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  27. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  28. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  29. def toString(): String
    Definition Classes
    AnyRef → Any
  30. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  31. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  32. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()
  33. object Suppression extends java.io.Serializable
    Definition Classes
    MatchTreeMaking

Deprecated Value Members

  1. def [B](y: B): (MatchOptimization, B)
    Implicit
    This member is added by an implicit conversion from MatchOptimization toArrowAssoc[MatchOptimization] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use -> instead. If you still wish to display it as one character, consider using a font with programming ligatures such as Fira Code.

Inherited from MatchApproximation

Inherited from ScalaLogic

Inherited from Logic

Inherited from TreeAndTypeAnalysis

Inherited from MatchTreeMaking

Inherited from Debugging

Inherited from MatchCodeGen

Inherited from Interface

Inherited from TreeDSL

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd fromMatchOptimization to any2stringadd[MatchOptimization]

Inherited by implicit conversion StringFormat fromMatchOptimization to StringFormat[MatchOptimization]

Inherited by implicit conversion Ensuring fromMatchOptimization to Ensuring[MatchOptimization]

Inherited by implicit conversion ArrowAssoc fromMatchOptimization to ArrowAssoc[MatchOptimization]

Ungrouped