Packages

trait MatchCodeGen extends Interface

Factory methods used by TreeMakers to make the actual trees.

We have two modes in which to emit trees: optimized (the default) and pure (aka "virtualized": match is parametric in its monad).

Source
MatchCodeGen.scala
Linear Supertypes
Interface, TreeDSL, AnyRef, Any
Known Subclasses
patmat, MatchAnalysis, MatchApproximation, MatchOptimization, MatchTreeMaking, PatternMatching
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Inherited
  1. MatchCodeGen
  2. Interface
  3. TreeDSL
  4. AnyRef
  5. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Visibility
  1. Public
  2. All

Type Members

  1. trait MatchMonadInterface extends AnyRef

    Interface with user-defined match monad? if there's a __match in scope, we use this as the match strategy, assuming it conforms to MatchStrategy as defined below:

    Interface with user-defined match monad? if there's a __match in scope, we use this as the match strategy, assuming it conforms to MatchStrategy as defined below:

    type Matcher[P[_], M[+_], A] = {
  def flatMap[B](f: P[A] => M[B]): M[B]
  def orElse[B >: A](alternative: => M[B]): M[B]
}

abstract class MatchStrategy[P[_], M[+_]] {
  // runs the matcher on the given input
  def runOrElse[T, U](in: P[T])(matcher: P[T] => M[U]): P[U]

  def zero: M[Nothing]
  def one[T](x: P[T]): M[T]
  def guard[T](cond: P[Boolean], then: => P[T]): M[T]
}

    P and M are derived from one's signature (def one[T](x: P[T]): M[T])

    if no __match is found, we assume the following implementation (and generate optimized code accordingly)

    object __match extends MatchStrategy[({type Id[x] = x})#Id, Option] {
  def zero = None
  def one[T](x: T) = Some(x)
  // NOTE: guard's return type must be of the shape M[T], where M is the monad in which the pattern match should be interpreted
  def guard[T](cond: Boolean, then: => T): Option[T] = if(cond) Some(then) else None
  def runOrElse[T, U](x: T)(f: T => Option[U]): U = f(x) getOrElse (throw new MatchError(x))
}
    Definition Classes
    Interface
  2. trait TypedSubstitution extends MatchMonadInterface
    Definition Classes
    Interface
  3. trait CodegenCore extends MatchMonadInterface
  4. trait OptimizedCodegen extends CodegenCore with TypedSubstitution with MatchMonadInterface
  5. trait PureCodegen extends CodegenCore with PureMatchMonadInterface
  6. trait PureMatchMonadInterface extends MatchMonadInterface

Abstract Value Members

  1. abstract val global: Global
    Definition Classes
    TreeDSL

Concrete Value Members

  1. object CODE
    Definition Classes
    TreeDSL
  2. object vpmName
    Definition Classes
    Interface
  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 MatchCodeGen to any2stringadd[MatchCodeGen] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  6. def ->[B](y: B): (MatchCodeGen, B)
    Implicit
    This member is added by an implicit conversion from MatchCodeGen to ArrowAssoc[MatchCodeGen] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  7. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  8. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  9. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  10. final def dealiasWiden(tp: Global.Type): Global.Type
    Attributes
    protected
    Definition Classes
    Interface
  11. def ensuring(cond: (MatchCodeGen) ⇒ Boolean, msg: ⇒ Any): MatchCodeGen
    Implicit
    This member is added by an implicit conversion from MatchCodeGen to Ensuring[MatchCodeGen] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  12. def ensuring(cond: (MatchCodeGen) ⇒ Boolean): MatchCodeGen
    Implicit
    This member is added by an implicit conversion from MatchCodeGen to Ensuring[MatchCodeGen] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  13. def ensuring(cond: Boolean, msg: ⇒ Any): MatchCodeGen
    Implicit
    This member is added by an implicit conversion from MatchCodeGen to Ensuring[MatchCodeGen] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  14. def ensuring(cond: Boolean): MatchCodeGen
    Implicit
    This member is added by an implicit conversion from MatchCodeGen to Ensuring[MatchCodeGen] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  15. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  16. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  17. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  18. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  19. final def hasStableSymbol(p: Global.Tree): Boolean
    Attributes
    protected
    Definition Classes
    Interface
  20. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  21. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  22. final def mkFALSE: Global.Literal
    Attributes
    protected
    Definition Classes
    Interface
  23. final def mkTRUE: Global.Literal
    Attributes
    protected
    Definition Classes
    Interface
  24. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  25. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  26. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  27. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  28. def toString(): String
    Definition Classes
    AnyRef → Any
  29. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  30. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  31. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  32. def →[B](y: B): (MatchCodeGen, B)
    Implicit
    This member is added by an implicit conversion from MatchCodeGen to ArrowAssoc[MatchCodeGen] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Deprecated Value Members

  1. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from MatchCodeGen to StringFormat[MatchCodeGen] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.12.16) Use formatString.format(value) instead of value.formatted(formatString), or use the f"" string interpolator. In Java 15 and later, formatted resolves to the new method in String which has reversed parameters.

Inherited from Interface

Inherited from TreeDSL

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from MatchCodeGen to any2stringadd[MatchCodeGen]

Inherited by implicit conversion StringFormat from MatchCodeGen to StringFormat[MatchCodeGen]

Inherited by implicit conversion Ensuring from MatchCodeGen to Ensuring[MatchCodeGen]

Inherited by implicit conversion ArrowAssoc from MatchCodeGen to ArrowAssoc[MatchCodeGen]

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