Scala Compiler2.13.5 < 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 ast
  Definition Classes
    nsc
-  package parser
  Definition Classes
    ast
-  trait Parsers extends Scanners with MarkupParsers with ParsersCommon

  Performs the following context-free rewritings:

  Performs the following context-free rewritings:

  - Places all pattern variables in Bind nodes. In a pattern, for identifiers `x`:

                      x  => x @ _
                    x:T  => x @ (_ : T)

  - Removes pattern definitions (PatDef's) as follows: If pattern is a simple (typed) identifier:

               val x = e     ==>  val x = e
               val x: T = e  ==>  val x: T = e

  if there are no variables in pattern

             val p = e  ==>  e match (case p => ())

  if there is exactly one variable in pattern

             val x_1 = e match (case p => (x_1))

  if there is more than one variable in pattern

             val p = e  ==>  private synthetic val t$ = e match (case p => (x_1, ..., x_N))
                             val x_1 = t$._1
                             ...
                             val x_N = t$._N

  - Removes function types as follows:

             (argtpes) => restpe   ==>   scala.Function_n[argtpes, restpe]

  - Wraps naked case definitions in a match as follows:

             { cases }   ==>   (x => x.match {cases}), except when already argument to match

  Definition Classes
    parser
-  abstract class Parser extends ParserCommon
  Definition Classes
    Parsers
- InfixMode
- ParserTreeBuilder
- PatternContextSensitive
- SeqContextSensitive

t

scala.tools.nsc.ast.parser.Parsers.Parser

# PatternContextSensitive

###

#### sealed trait PatternContextSensitive extends AnyRef

Methods which implicitly propagate the context in which they were called: either in a pattern context or not. Formerly, this was threaded through numerous methods as boolean isPattern.

Source
  Parsers.scala

Linear Supertypes
AnyRef, Any
Known Subclasses
SeqContextSensitive
Type Hierarchy
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Ordering

1. Alphabetic
2. By Inheritance

Inherited

1. PatternContextSensitive
2. AnyRef
3. 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

### Abstract Value Members

1.  abstract def argType(): Global.Tree

       ArgType       ::=  Type

2.  abstract def functionArgType(): Global.Tree

### Concrete 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 PatternContextSensitive toany2stringadd[PatternContextSensitive] performed by method any2stringadd in scala.Predef.
   Definition Classes
     any2stringadd
4.  def ->[B](y: B): (PatternContextSensitive, B)
   Implicit
     This member is added by an implicit conversion from PatternContextSensitive toArrowAssoc[PatternContextSensitive] performed by method ArrowAssoc in scala.Predef.
   Definition Classes
     ArrowAssoc
   Annotations
     @inline()
5.  final def ==(arg0: Any): Boolean
   Definition Classes
     AnyRef → Any
6.  def annotType(): Global.Tree

       AnnotType        ::=  SimpleType {Annotation}

7.  final def asInstanceOf[T0]: T0
   Definition Classes
     Any
8.  def clone(): AnyRef
   Attributes
     protected[lang]
   Definition Classes
     AnyRef
   Annotations
     @throws(classOf[java.lang.CloneNotSupportedException]) @native()
9.  def compoundType(): Global.Tree

       CompoundType ::= AnnotType {with AnnotType} [Refinement]
                     |  Refinement

10.  def compoundTypeRest(t: Global.Tree): Global.Tree
11.  def ensuring(cond: (PatternContextSensitive) => Boolean, msg: => Any): PatternContextSensitive
    Implicit
      This member is added by an implicit conversion from PatternContextSensitive toEnsuring[PatternContextSensitive] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
12.  def ensuring(cond: (PatternContextSensitive) => Boolean): PatternContextSensitive
    Implicit
      This member is added by an implicit conversion from PatternContextSensitive toEnsuring[PatternContextSensitive] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
13.  def ensuring(cond: Boolean, msg: => Any): PatternContextSensitive
    Implicit
      This member is added by an implicit conversion from PatternContextSensitive toEnsuring[PatternContextSensitive] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
14.  def ensuring(cond: Boolean): PatternContextSensitive
    Implicit
      This member is added by an implicit conversion from PatternContextSensitive toEnsuring[PatternContextSensitive] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
15.  final def eq(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
16.  def equals(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef → Any
17.  def finalize(): Unit
    Attributes
      protected[lang]
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.Throwable])
18.  def formatted(fmtstr: String): String
    Implicit
      This member is added by an implicit conversion from PatternContextSensitive toStringFormat[PatternContextSensitive] performed by method StringFormat in scala.Predef.
    Definition Classes
      StringFormat
    Annotations
      @inline()
19.  def functionTypes(): List[Global.Tree]
20.  final def getClass(): Class[_ <: AnyRef]
    Definition Classes
      AnyRef → Any
    Annotations
      @native()
21.  def hashCode(): Int
    Definition Classes
      AnyRef → Any
    Annotations
      @native()
22.  def infixType(mode: InfixMode.Value): Global.Tree

        InfixType ::= CompoundType {id [nl] CompoundType}

23.  def infixTypeRest(t: Global.Tree, mode: InfixMode.Value): Global.Tree
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.  def simpleType(): Global.Tree

        SimpleType       ::=  SimpleType TypeArgs
                           |  SimpleType `#` Id
                           |  StableId
                           |  Path `.` type
                           |  Literal
                           |  `(` Types `)`
                           |  WildcardType

29.  final def simpleTypeRest(t: Global.Tree): Global.Tree
    Annotations
      @tailrec()
30.  final def synchronized[T0](arg0: => T0): T0
    Definition Classes
      AnyRef
31.  def toString(): String
    Definition Classes
      AnyRef → Any
32.  def typ(): Global.Tree

        Type ::= InfixType `=>` Type
               | `(` [`=>` Type] `)` `=>` Type
               | InfixType [ExistentialClause]
        ExistentialClause ::= forSome `{` ExistentialDcl {semi ExistentialDcl} `}`
        ExistentialDcl    ::= type TypeDcl | val ValDcl

33.  def typeArgs(): List[Global.Tree]

        TypeArgs    ::= `[` ArgType {`,` ArgType} `]`

34.  def types(): List[Global.Tree]

        Types ::= Type {`,` Type}

35.  final def wait(): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException])
36.  final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException])
37.  final def wait(arg0: Long): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException]) @native()

### Deprecated Value Members

1.  def →[B](y: B): (PatternContextSensitive, B)
   Implicit
     This member is added by an implicit conversion from PatternContextSensitive toArrowAssoc[PatternContextSensitive] 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 AnyRef

### Inherited from Any

### Inherited by implicit conversion any2stringadd fromPatternContextSensitive to any2stringadd[PatternContextSensitive]

### Inherited by implicit conversion StringFormat fromPatternContextSensitive to StringFormat[PatternContextSensitive]

### Inherited by implicit conversion Ensuring fromPatternContextSensitive to Ensuring[PatternContextSensitive]

### Inherited by implicit conversion ArrowAssoc fromPatternContextSensitive to ArrowAssoc[PatternContextSensitive]

### Ungrouped