Scala Compiler2.13.17 < Back
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# Packages

-  package root

  The Scala compiler and reflection APIs.

  The Scala compiler and reflection APIs.

  Definition Classes
    root
-  package scala
  Definition Classes
    root
-  package tools
  Definition Classes
    scala
-  package nsc
  Definition Classes
    tools
-  package transform
  Definition Classes
    nsc
-  package patmat
  Definition Classes
    transform
-  trait MatchTreeMaking extends MatchCodeGen with Debugging

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

  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.

  Definition Classes
    patmat
-  trait TreeMakers extends TypedSubstitution with CodegenCore
  Definition Classes
    MatchTreeMaking
- AbsCodegen
- AlternativesTreeMaker
- BodyTreeMaker
- Casegen
- CommonCodegen
- CondTreeMaker
- DummyTreeMaker
- EmptySubstitution
- EqualityTestTreeMaker
- ExtractorTreeMaker
- FunTreeMaker
- GuardTreeMaker
- NoNewBinders
- NonNullTestTreeMaker
- PreserveSubPatBinders
- ProductExtractorTreeMaker
- SubstOnlyTreeMaker
- Substitution
- TreeMaker
- TrivialTreeMaker
- TypeTestTreeMaker

c

scala.tools.nsc.transform.patmat.MatchTreeMaking.TreeMakers

# TypeTestTreeMaker

###
Companion object TypeTestTreeMaker

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

implements the run-time aspects of (§8.2) (typedPattern has already done the necessary type transformations)

Type patterns consist of types, type variables, and wildcards. A type pattern T is of one of the following forms:

- A reference to a class C, p.C, or T#C. This type pattern matches any non-null instance of the given class. Note that the prefix of the class, if it is given, is relevant for determining class instances. For instance, the pattern p.C matches only instances of classes C which were created with the path p as prefix. The bottom types scala.Nothing and scala.Null cannot be used as type patterns, because they would match nothing in any case.
- A singleton type p.type. This type pattern matches only the value denoted by the path p (that is, a pattern match involved a comparison of the matched value with p using method eq in class AnyRef). // TODO: the actual pattern matcher uses ==, so that's what I'm using for now // https://github.com/scala/bug/issues/4577 "pattern matcher, still disappointing us at equality time"
- A compound type pattern T1 with ... with Tn where each Ti is a type pat- tern. This type pattern matches all values that are matched by each of the type patterns Ti.
- A parameterized type pattern T[a1,...,an], where the ai are type variable patterns or wildcards _. This type pattern matches all values which match T for some arbitrary instantiation of the type variables and wildcards. The bounds or alias type of these type variable are determined as described in (§8.3).
- A parameterized type pattern scala.Array[T1], where T1 is a type pattern. // TODO This type pattern matches any non-null instance of type scala.Array[U1], where U1 is a type matched by T1.

Source
  MatchTreeMaking.scala

Linear Supertypes
java.io.Serializable, Product, Equals, CondTreeMaker, FunTreeMaker, TreeMaker, AnyRef, Any
Type Hierarchy

Ordering

1. Alphabetic
2. By Inheritance

Inherited

1. TypeTestTreeMaker
2. Serializable
3. Product
4. Equals
5. CondTreeMaker
6. FunTreeMaker
7. TreeMaker
8. AnyRef
9. Any

Implicitly

1. by any2stringadd
2. by StringFormat
3. by Ensuring
4. by ArrowAssoc

1. Hide All
2. Show All

Visibility

1. Public
2. Protected

### Instance Constructors

1.  new TypeTestTreeMaker(prevBinder: Global.Symbol, testedBinder: Global.Symbol, expectedTp: Global.Type, nextBinderTp: Global.Type)(pos: Global.Position, extractorArgTypeTest: Boolean = false)

### Value Members

1.  final def !=(arg0: Any): Boolean
   Definition Classes
     AnyRef → Any
2.  final def ##: Int
   Definition Classes
     AnyRef → Any
3.  def +(other: String): String
   Implicit
     This member is added by an implicit conversion from TypeTestTreeMaker toany2stringadd[TypeTestTreeMaker] performed by method any2stringadd in scala.Predef.
   Definition Classes
     any2stringadd
4.  def ->[B](y: B): (TypeTestTreeMaker, B)
   Implicit
     This member is added by an implicit conversion from TypeTestTreeMaker toArrowAssoc[TypeTestTreeMaker] performed by method ArrowAssoc in scala.Predef.
   Definition Classes
     ArrowAssoc
   Annotations
     @inline()
5.  final def ==(arg0: Any): Boolean
   Definition Classes
     AnyRef → Any
6.  final def asInstanceOf[T0]: T0
   Definition Classes
     Any
7.  def chainBefore(next: Global.Tree)(casegen: TreeMakers.Casegen): Global.Tree
   Definition Classes
     CondTreeMaker → TreeMaker
8.  def clone(): AnyRef
   Attributes
     protected[lang]
   Definition Classes
     AnyRef
   Annotations
     @throws(classOf[java.lang.CloneNotSupportedException]) @native()
9.  val cond: Result
   Definition Classes
     TypeTestTreeMaker → CondTreeMaker
10.  def ensuring(cond: (TypeTestTreeMaker) => Boolean, msg: => Any): TypeTestTreeMaker
    Implicit
      This member is added by an implicit conversion from TypeTestTreeMaker toEnsuring[TypeTestTreeMaker] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
11.  def ensuring(cond: (TypeTestTreeMaker) => Boolean): TypeTestTreeMaker
    Implicit
      This member is added by an implicit conversion from TypeTestTreeMaker toEnsuring[TypeTestTreeMaker] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
12.  def ensuring(cond: Boolean, msg: => Any): TypeTestTreeMaker
    Implicit
      This member is added by an implicit conversion from TypeTestTreeMaker toEnsuring[TypeTestTreeMaker] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
13.  def ensuring(cond: Boolean): TypeTestTreeMaker
    Implicit
      This member is added by an implicit conversion from TypeTestTreeMaker toEnsuring[TypeTestTreeMaker] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
14.  final def eq(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
15.  val expectedTp: Global.Type
16.  def finalize(): Unit
    Attributes
      protected[lang]
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.Throwable])
17.  final def getClass(): Class[_ <: AnyRef]
    Definition Classes
      AnyRef → Any
    Annotations
      @native()
18.  final def isInstanceOf[T0]: Boolean
    Definition Classes
      Any
19.  def isPureTypeTest: Result
20.  lazy val localSubstitution: TreeMakers.Substitution
    Definition Classes
      CondTreeMaker → TreeMaker
21.  final def ne(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
22.  lazy val nextBinder: Global.TermSymbol
    Definition Classes
      CondTreeMaker → FunTreeMaker
23.  val nextBinderTp: Global.Type
    Definition Classes
      TypeTestTreeMaker → CondTreeMaker
24.  final def notify(): Unit
    Definition Classes
      AnyRef
    Annotations
      @native()
25.  final def notifyAll(): Unit
    Definition Classes
      AnyRef
    Annotations
      @native()
26.  val pos: Global.Position
    Definition Classes
      TypeTestTreeMaker → FunTreeMaker → TreeMaker
27.  val prevBinder: Global.Symbol
    Definition Classes
      TypeTestTreeMaker → CondTreeMaker
28.  def productElementNames: Iterator[String]
    Definition Classes
      Product
29.  def renderCondition(cs: TypeTestCondStrategy): Result
30.  val res: Global.Tree
    Definition Classes
      TypeTestTreeMaker → CondTreeMaker
31.  def subPatternsAsSubstitution: TreeMakers.Substitution

    The substitution that specifies the trees that compute the values of the subpattern binders.

    The substitution that specifies the trees that compute the values of the subpattern binders.

    Should not be used to perform actual substitution! Only used to reason symbolically about the values the subpattern binders are bound to. See TreeMakerToCond#updateSubstitution.

    Overridden in PreserveSubPatBinders to pretend it replaces the subpattern binders by subpattern refs (Even though we don't do so anymore -- see scala/bug#5158, scala/bug#5739 and scala/bug#6070.)

    TODO: clean this up, would be nicer to have some higher-level way to compute the binders bound by this tree maker and the symbolic values that correspond to them

    Definition Classes
      TreeMaker
32.  def substitution: TreeMakers.Substitution

    captures the scope and the value of the bindings in patterns important *when* the substitution happens (can't accumulate and do at once after the full matcher has been constructed)

    captures the scope and the value of the bindings in patterns important *when* the substitution happens (can't accumulate and do at once after the full matcher has been constructed)

    Definition Classes
      TreeMaker
33.  final def synchronized[T0](arg0: => T0): T0
    Definition Classes
      AnyRef
34.  val testedBinder: Global.Symbol
35.  def toString(): String
    Definition Classes
      TypeTestTreeMaker → AnyRef → Any
36.  final def wait(): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException])
37.  final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException])
38.  final def wait(arg0: Long): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException]) @native()

### Deprecated Value Members

1.  def formatted(fmtstr: String): String
   Implicit
     This member is added by an implicit conversion from TypeTestTreeMaker toStringFormat[TypeTestTreeMaker] 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.

2.  def →[B](y: B): (TypeTestTreeMaker, B)
   Implicit
     This member is added by an implicit conversion from TypeTestTreeMaker toArrowAssoc[TypeTestTreeMaker] 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 java.io.Serializable

### Inherited from Product

### Inherited from Equals

### Inherited from CondTreeMaker

### Inherited from FunTreeMaker

### Inherited from TreeMaker

### Inherited from AnyRef

### Inherited from Any

### Inherited by implicit conversion any2stringadd fromTypeTestTreeMaker to any2stringadd[TypeTestTreeMaker]

### Inherited by implicit conversion StringFormat fromTypeTestTreeMaker to StringFormat[TypeTestTreeMaker]

### Inherited by implicit conversion Ensuring fromTypeTestTreeMaker to Ensuring[TypeTestTreeMaker]

### Inherited by implicit conversion ArrowAssoc fromTypeTestTreeMaker to ArrowAssoc[TypeTestTreeMaker]

### Ungrouped