Packages

t

scala.tools.nsc.transform.patmat

MatchTreeMaking

trait MatchTreeMaking extends MatchCodeGen with Debugging

Translate our IR (TreeMakers) into actual Scala Trees using the factory methods in MatchCodeGen.

The IR is mostly concerned with sequencing, substitution, and rendering all necessary conditions, mostly agnostic to whether we're in optimized/pure (virtualized) mode.

Source
MatchTreeMaking.scala
Linear Supertypes
Debugging, MatchCodeGen, Interface, TreeDSL, AnyRef, Any
Known Subclasses
patmat, MatchAnalysis, MatchApproximation, MatchOptimization, PatternMatching
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. MatchTreeMaking
  2. Debugging
  3. MatchCodeGen
  4. Interface
  5. TreeDSL
  6. AnyRef
  7. 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
    Definition Classes
    MatchCodeGen
  4. trait OptimizedCodegen extends CodegenCore with TypedSubstitution with MatchMonadInterface
    Definition Classes
    MatchCodeGen
  5. trait PureCodegen extends CodegenCore with PureMatchMonadInterface
    Definition Classes
    MatchCodeGen
  6. trait PureMatchMonadInterface extends MatchMonadInterface
    Definition Classes
    MatchCodeGen
  7. final case class Suppression(suppressExhaustive: Boolean, suppressUnreachable: Boolean) extends Product with Serializable
  8. trait TreeMakers extends TypedSubstitution with CodegenCore

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. object vpmName
    Definition Classes
    Interface
  4. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  5. final def ##(): Int
    Definition Classes
    AnyRef → Any
  6. def +(other: String): String
    Implicit
    This member is added by an implicit conversion from MatchTreeMaking to any2stringadd[MatchTreeMaking] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  7. def ->[B](y: B): (MatchTreeMaking, B)
    Implicit
    This member is added by an implicit conversion from MatchTreeMaking to ArrowAssoc[MatchTreeMaking] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  8. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  9. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  10. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  11. final def dealiasWiden(tp: Global.Type): Global.Type
    Attributes
    protected
    Definition Classes
    Interface
  12. def ensuring(cond: (MatchTreeMaking) ⇒ Boolean, msg: ⇒ Any): MatchTreeMaking
    Implicit
    This member is added by an implicit conversion from MatchTreeMaking to Ensuring[MatchTreeMaking] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  13. def ensuring(cond: (MatchTreeMaking) ⇒ Boolean): MatchTreeMaking
    Implicit
    This member is added by an implicit conversion from MatchTreeMaking to Ensuring[MatchTreeMaking] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  14. def ensuring(cond: Boolean, msg: ⇒ Any): MatchTreeMaking
    Implicit
    This member is added by an implicit conversion from MatchTreeMaking to Ensuring[MatchTreeMaking] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  15. def ensuring(cond: Boolean): MatchTreeMaking
    Implicit
    This member is added by an implicit conversion from MatchTreeMaking to Ensuring[MatchTreeMaking] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  16. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  17. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  18. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  19. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  20. final def hasStableSymbol(p: Global.Tree): Boolean
    Attributes
    protected
    Definition Classes
    Interface
  21. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  22. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  23. final def mkFALSE: Global.Literal
    Attributes
    protected
    Definition Classes
    Interface
  24. final def mkTRUE: Global.Literal
    Attributes
    protected
    Definition Classes
    Interface
  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( ... )
  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( ... ) @native()
  33. def →[B](y: B): (MatchTreeMaking, B)
    Implicit
    This member is added by an implicit conversion from MatchTreeMaking to ArrowAssoc[MatchTreeMaking] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
  34. object Suppression extends Serializable

Deprecated Value Members

  1. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from MatchTreeMaking to StringFormat[MatchTreeMaking] 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 Debugging

Inherited from MatchCodeGen

Inherited from Interface

Inherited from TreeDSL

Inherited from AnyRef

Inherited from Any

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

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

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

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

Ungrouped